# Best Voice AI for Outbound Sales (2026)

> The best Voice AI platforms for outbound sales: Cognigy (NiCE) leads, for outbound sales and call-center campaigns. Verified pricing and per-use-case verdicts.

For outbound sales, **Cognigy (NiCE)** is our pick: For outbound sales and call-center campaigns, the single most critical capability is native outbound campaign support built into the platform. Outbound sales and call-center campaigns. Below is the full ranking and the tradeoffs, or read [how we score](https://www.versusref.com/methodology/).

## What matters for outbound sales campaigns

Weight ×5 = decisive, ×1 = relevant.

| Fact | Weight | Cognigy (NiCE) | STELLA Automotive AI | Decagon | Dentina | Dialzara |
| --- | --- | --- | --- | --- | --- | --- |
| Native outbound campaigns | ×5 | ✓  Yes (Jul 30) | ✓  Yes (Jul 30) | ✓  Yes (Jul 30) | ✓  Yes (Jul 30) | ✓  Yes (Jul 30) |
| Real production cost / min | ×4 | n/a | n/a | n/a | n/a | n/a |
| Concurrency limit (base) | ×4 | n/a | n/a | n/a | n/a | n/a |
| Native SIP trunking | ×3 | n/a | n/a | n/a | n/a | n/a |
| Warm transfer to human | ×2 | ✓  Yes (Jul 30) | n/a | ✓  Yes (Jul 30) | ✓  Yes (Jul 30) | n/a |

- ×5 **Native outbound campaigns:** Native campaign tooling is the whole job here.
- ×4 **Real production cost / min:** Outbound economics live or die on the per-minute rate at volume.
- ×4 **Concurrency limit (base):** Included concurrent lines cap campaign throughput.
- ×3 **Native SIP trunking:** Bring-your-own trunks cut telephony cost at call-center scale.
- ×2 **Warm transfer to human:** Qualified leads need a live handoff to close.

## The ranking, tool by tool

| Rank | Tool | Verdict | Score | Price |
| --- | --- | --- | --- | --- |
| 1 | [Cognigy (NiCE)](https://www.versusref.com/voice-ai/tools/cognigy/) | For outbound sales and call-center campaigns, the single most critical capability is native outbound campaign support built into the platform. | 4 of 4 points · 2 matchups | See pricing |
| 2 | [STELLA Automotive AI](https://www.versusref.com/voice-ai/tools/stella-automotive/) | For outbound sales campaigns, the single most critical capability is whether the platform natively supports outbound calling campaigns. | 4 of 4 points · 2 matchups | See pricing |
| 3 | [Decagon](https://www.versusref.com/voice-ai/tools/decagon/) | For outbound sales and call-center campaigns, the single most important capability is native outbound campaign support. | 2 of 2 points · 1 matchup | See pricing |
| 4 | [Dentina](https://www.versusref.com/voice-ai/tools/dentina/) | For outbound sales campaigns, the single most critical factor is whether a platform natively supports outbound campaign functionality. | 2 of 2 points · 1 matchup | From $299/mo |
| 5 | [Dialzara](https://www.versusref.com/voice-ai/tools/dialzara/) | For outbound sales campaigns, the single most critical capability is native outbound campaign support. | 2 of 2 points · 1 matchup | From $0.48/min |
| 6 | [Observe.AI](https://www.versusref.com/voice-ai/tools/observe-ai/) | For outbound sales and call-center campaigns, native outbound campaign capability is the single most critical factor. | 2 of 2 points · 1 matchup | See pricing |
| 7 | [Replicant](https://www.versusref.com/voice-ai/tools/replicant/) | For outbound sales and call-center campaigns, the single most important capability is verified native outbound campaign support. | 2 of 2 points · 1 matchup | See pricing |
| 8 | [Smith.ai](https://www.versusref.com/voice-ai/tools/smith-ai/) | For outbound sales campaigns, the most critical factor is whether a platform natively supports outbound campaigns. | 2 of 2 points · 1 matchup | From $150/mo |
| 9 | [Telnyx Voice AI Agents](https://www.versusref.com/voice-ai/tools/telnyx-voice-ai/) | For outbound sales campaigns, native outbound campaign functionality is the deciding factor. | 2 of 2 points · 1 matchup | From $0.05/min |
| 10 | [Retell AI](https://www.versusref.com/voice-ai/tools/retell/) | Both tools support native outbound campaigns, but Retell AI has meaningful cost and scale advantages for high-volume outbound sales. | 13 of 18 points · 9 matchups | From $0.07/min |
| 11 | [Bland AI](https://www.versusref.com/voice-ai/tools/bland/) | Both tools support native outbound campaigns, but Bland AI has several concrete advantages for outbound sales. | 12 of 18 points · 9 matchups | From $0.14/min |
| 12 | [Vapi](https://www.versusref.com/voice-ai/tools/vapi/) | For outbound sales campaigns, a purpose-built native outbound campaigns feature is the deciding factor. | 22 of 34 points · 17 matchups | From $0.05/min |
| 13 | [Assort Health](https://www.versusref.com/voice-ai/tools/assort-health/) | Both platforms support native outbound campaigns, so that capability does not separate them. | 1 of 2 points · 1 matchup | See pricing |
| 14 | [Bolna](https://www.versusref.com/voice-ai/tools/bolna/) | Both platforms support native outbound campaigns, warm transfer, and pass LLM/TTS costs through at cost. | 1 of 2 points · 1 matchup | From $0.06/min |
| 15 | [Salient](https://www.versusref.com/voice-ai/tools/salient/) | Both tools support native outbound campaigns, so that capability is a draw. | 1 of 2 points · 1 matchup | See pricing |
| 16 | [Avoca](https://www.versusref.com/voice-ai/tools/avoca/) | Both tools natively support outbound campaigns, so that critical capability is matched. | 1.5 of 4 points · 2 matchups | See pricing |
| 17 | [Phonely](https://www.versusref.com/voice-ai/tools/phonely/) | For outbound sales campaigns, native outbound campaign support is the deciding factor. | 3 of 10 points · 5 matchups | From $0.05/min |
| 18 | [OpenAI Realtime API](https://www.versusref.com/voice-ai/tools/openai-realtime-api/) | For outbound sales campaigns, connecting to existing phone infrastructure is a critical practical requirement. | 2 of 8 points · 4 matchups | See pricing |
| 19 | [Thoughtly](https://www.versusref.com/voice-ai/tools/thoughtly/) | Thoughtly includes native outbound campaigns (fact 71644153), warm transfer to human agents (fact a811b00b), 200+ native integrations including HubSpot and Salesforce (fact 47704dd3), a built-in knowledge base, and native SIP trunking. | 2 of 8 points · 4 matchups | From $500/mo |
| 20 | [Voiceflow](https://www.versusref.com/voice-ai/tools/voiceflow/) | Voiceflow has native outbound campaigns support (f2404772), which directly serves outbound sales and call-center use cases. | 2 of 8 points · 4 matchups | From $0.05/min |
| 21 | [Pipecat](https://www.versusref.com/voice-ai/tools/pipecat/) (OSS) | For outbound sales campaigns, the most critical attribute is native outbound campaign support. | 1.5 of 6 points · 3 matchups | From $0.01/min |
| 22 | [Cresta](https://www.versusref.com/voice-ai/tools/cresta/) | For outbound sales campaigns, the ability to plug into existing call-center infrastructure matters most. | 1 of 4 points · 2 matchups | See pricing |
| 23 | [PolyAI](https://www.versusref.com/voice-ai/tools/polyai/) | Enterprise voice assistants. | 1 of 4 points · 2 matchups | See pricing |
| 24 | [Alex (fka Apriora)](https://www.versusref.com/voice-ai/tools/alex/) | 'Interview everyone. Hire the best.' - autonomous AI interviewer (voice + video) for high-volume hiring, operated by Apriora Inc. dba Alex. | 0.5 of 2 points · 1 matchup | See pricing |
| 25 | [ConverzAI](https://www.versusref.com/voice-ai/tools/converzai/) | 'World's Leading Automation for Staffing Firms' - agentic virtual recruiters covering the pipeline from sourcing to placement, staffing-agency (not corporate HR) focus. | 0.5 of 2 points · 1 matchup | See pricing |
| 26 | [Loman AI](https://www.versusref.com/voice-ai/tools/loman/) | Restaurant voice AI with deep POS order-writing (Toast/Square/Clover/Olo etc.) - orders and payments, not just reservations and FAQs. | 0.5 of 2 points · 1 matchup | See pricing |
| 27 | [Numa](https://www.versusref.com/voice-ai/tools/numa/) | AI operating system for the AI-native dealership - voice AI plus agentic follow-up (Heat Case, Opportunity, Service Advisor agents) for franchise dealers and multi-rooftop groups. | 0.5 of 2 points · 1 matchup | See pricing |
| 28 | [Omilia](https://www.versusref.com/voice-ai/tools/omilia/) | Conversational AI platform for contact-center voice/IVR automation, with native 'Lexis' voice synthesis and agentic voice/chat agents. | 0.5 of 2 points · 1 matchup | See pricing |
| 29 | [Patter](https://www.versusref.com/voice-ai/tools/patter/) (OSS) | MIT-licensed, self-host-only voice AI SDK (Python + TypeScript) abstracting 27+ providers across LLM/STT/TTS/carrier layers - a middle ground between hosted platforms (Vapi/Retell) and heavyweight frameworks. | 0.5 of 2 points · 1 matchup | See pricing |
| 30 | [Sameday](https://www.versusref.com/voice-ai/tools/sameday/) | Trades-focused AI sales agent - sells and books jobs (claims 92%+ booking rate, voice cloning of your staff) rather than just taking messages. | 0.5 of 2 points · 1 matchup | From $449/mo |
| 31 | [Slang AI](https://www.versusref.com/voice-ai/tools/slang-ai/) | Hospitality-native voice AI ('Superhost') priced per location - reservation-system depth and guest recognition rather than generic receptionist features. | 0.5 of 2 points · 1 matchup | From $399/mo |
| 32 | [Zoom Virtual Agent Receptionist](https://www.versusref.com/voice-ai/tools/zoom-virtual-agent-receptionist/) | Big-tech price anchor for the receptionist segment: standalone AI receptionist at $29.99/mo (100 min), launched 2026-07-09; also bundled free with Zoom Phone. | 0.5 of 2 points · 1 matchup | From $29.99/mo |
| 33 | [ElevenLabs Agents](https://www.versusref.com/voice-ai/tools/elevenlabs-agents/) | Ringly.io explicitly lacks native outbound campaign support, whereas no such restriction is noted for ElevenLabs Agents. | 4.5 of 20 points · 10 matchups | From $0.05/min |
| 34 | [Millis AI](https://www.versusref.com/voice-ai/tools/millis/) | For outbound sales campaigns, Millis AI offers native outbound campaign support and native SIP trunking, which are directly relevant features. | 1 of 8 points · 4 matchups | From $0.02/min |
| 35 | [Ultravox](https://www.versusref.com/voice-ai/tools/ultravox/) | For outbound sales campaigns, Ultravox offers native outbound campaign support (fact 82367d69), warm transfer to human agents (fact deec6680), a built-in knowledge base (fact f1834a86), native SIP trunking (fact f34fa10e), and DTMF/IVR navigation (fact 2f574526). | 1 of 8 points · 4 matchups | From $0.05/min |
| 36 | [Vocode](https://www.versusref.com/voice-ai/tools/vocode/) (OSS) | Vocode has vendor-confirmed native outbound campaigns support, plus native SIP trunking and warm transfer to human, all critical for outbound sales call-center workflows. | 1 of 8 points · 4 matchups | See pricing |
| 37 | [Hume EVI](https://www.versusref.com/voice-ai/tools/hume-evi/) | Emotionally intelligent speech-to-speech API (Empathic Voice Interface, EVI 3 / EVI 4 mini) with voice cloning and supplemental-LLM support. | 0.5 of 4 points · 2 matchups | From $0.07/min |
| 38 | [Parloa](https://www.versusref.com/voice-ai/tools/parloa/) | AI Agent Management Platform (AMP) for enterprise contact centers - design, test, scale, optimize agentic AI. | 0.5 of 4 points · 2 matchups | See pricing |
| 39 | [Rosie](https://www.versusref.com/voice-ai/tools/rosie/) | Self-serve SMB AI answering service with bundled-minute pricing and bilingual EN/ES on every plan. | 0.5 of 4 points · 2 matchups | From $49/mo |
| 40 | [Toma](https://www.versusref.com/voice-ai/tools/toma/) | "AI Coworkers for the Automotive Enterprise" - dealership call automation with production safeguards, YC/a16z-backed. | 0.5 of 4 points · 2 matchups | See pricing |
| 41 | [Abby Connect](https://www.versusref.com/voice-ai/tools/abby-connect/) | Legacy virtual-receptionist provider (est. 2005) adding a lower-cost AI tier with built-in human backup; minute-bundle pricing on both lines. | 0 of 2 points · 1 matchup | From $99/mo |
| 42 | [Arini](https://www.versusref.com/voice-ai/tools/arini/) | The AI front desk for dental groups and DSOs - zero missed calls, 24/7. | 0 of 2 points · 1 matchup | See pricing |
| 43 | [ASAPP](https://www.versusref.com/voice-ai/tools/asapp/) | Generative AI CX platform whose GenerativeAgent overlays existing CCaaS stacks to automate voice and messaging interactions. | 0 of 2 points · 1 matchup | See pricing |
| 44 | [Brooke.ai](https://www.versusref.com/voice-ai/tools/brooke-ai/) | OEM-channel digital voice assistant for fixed ops - a sub-brand of Proactive Dealer Solutions (Better Car People), sold through programs like Stellantis MarketCenter rather than as a standalone startup. | 0 of 2 points · 1 matchup | See pricing |
| 45 | [Dasha](https://www.versusref.com/voice-ai/tools/dasha/) | Dev platform, conversational AI. | 0 of 8 points · 4 matchups | From $0.08/min |
| 46 | [Deepgram Voice Agent API](https://www.versusref.com/voice-ai/tools/deepgram-voice-agent-api/) | Unified STT + LLM orchestration + TTS voice-agent pipeline at a flat all-in rate ($4.50/hr), with BYO-LLM/TTS discounts and enterprise deployment options. | 0 of 2 points · 1 matchup | From $0.07/min |
| 47 | [Dograh](https://www.versusref.com/voice-ai/tools/dograh/) (OSS) | Self-hostable open-source voice agent platform ('OSS alternative to Vapi & Retell') with a no-code workflow builder and air-gapped on-prem deployment for regulated industries. | 0 of 2 points · 1 matchup | See pricing |
| 48 | [Domu](https://www.versusref.com/voice-ai/tools/domu/) | YC S24 collections-automation platform for financial institutions across the Americas - 'compliance is not a checkbox, it is the architecture'. | 0 of 2 points · 1 matchup | See pricing |
| 49 | [Google Gemini Live API](https://www.versusref.com/voice-ai/tools/gemini-live-api/) | Native-audio speech-to-speech model API (Gemini Live) with barge-in, affective dialog, and tool use over a stateful WebSocket. | 0 of 2 points · 1 matchup | From $0.02/min |
| 50 | [Hello Patient](https://www.versusref.com/voice-ai/tools/hello-patient/) | Conversational AI for healthcare's 'front door' - voice, SMS, and chat patient communication. | 0 of 2 points · 1 matchup | See pricing |
| 51 | [Kore.ai](https://www.versusref.com/voice-ai/tools/kore-ai/) | Enterprise agentic AI platform (Artemis) with voice AI agents for contact-center self-service at Global 2000 scale. | 0 of 2 points · 1 matchup | See pricing |
| 52 | [Level AI](https://www.versusref.com/voice-ai/tools/level-ai/) | LLM-native contact-center intelligence platform (QA/Agent Assist center of gravity) with an AI Virtual Agent for voice and chat automation. | 0 of 2 points · 1 matchup | See pricing |
| 53 | [LiveKit Agents](https://www.versusref.com/voice-ai/tools/livekit-agents/) (OSS) | Realtime infra + agents (OSS + cloud). | 0 of 10 points · 5 matchups | From $0.01/min |
| 54 | [Netic](https://www.versusref.com/voice-ai/tools/netic/) | Autonomous AI revenue engine for essential home services. | 0 of 2 points · 1 matchup | See pricing |
| 55 | [Ringly.io](https://www.versusref.com/voice-ai/tools/ringly/) | Ecommerce phone agents. | 0 of 6 points · 3 matchups | From $0.29/min |
| 56 | [Sierra](https://www.versusref.com/voice-ai/tools/sierra/) | Outcome-priced conversational AI agent platform from Bret Taylor and Clay Bavor; voice product replaces IVR with an empathetic agent. | 0 of 2 points · 1 matchup | See pricing |
| 57 | [Twilio ConversationRelay](https://www.versusref.com/voice-ai/tools/twilio-conversationrelay/) | Carrier-grade voice harness for BYO-LLM agents inside Twilio Programmable Voice. | 0 of 4 points · 2 matchups | From $0.07/min |
| 58 | [Upfirst](https://www.versusref.com/voice-ai/tools/upfirst/) | Per-call-bundle AI receptionist with 35+ languages and declining overage rates up to 600 calls/mo. | 0 of 2 points · 1 matchup | From $24.95/mo |

### 1. Cognigy (NiCE)

For outbound sales and call-center campaigns, the single most critical capability is native outbound campaign support built into the platform. [Full Cognigy (NiCE) vs Parloa verdict](https://www.versusref.com/voice-ai/cognigy-vs-parloa/)

For outbound sales campaigns, native outbound campaign support is the deciding factor. [Full Cognigy (NiCE) vs Kore.ai verdict](https://www.versusref.com/voice-ai/cognigy-vs-kore-ai/)

### 2. STELLA Automotive AI

For outbound sales campaigns, the single most critical capability is whether the platform natively supports outbound calling campaigns. [Full STELLA Automotive AI vs Toma verdict](https://www.versusref.com/voice-ai/stella-automotive-vs-toma/)

For outbound sales and call-center campaigns, the single most important capability is whether the platform natively supports outbound campaigns rather than requiring custom workarounds. [Full STELLA Automotive AI vs Brooke.ai verdict](https://www.versusref.com/voice-ai/brooke-ai-vs-stella-automotive/)

### 3. Decagon

For outbound sales and call-center campaigns, the single most important capability is native outbound campaign support. [Full Decagon vs Sierra verdict](https://www.versusref.com/voice-ai/decagon-vs-sierra/)

### 4. Dentina

For outbound sales campaigns, the single most critical factor is whether a platform natively supports outbound campaign functionality. [Full Dentina vs Arini verdict](https://www.versusref.com/voice-ai/arini-vs-dentina/)

### 5. Dialzara

For outbound sales campaigns, the single most critical capability is native outbound campaign support. [Full Dialzara vs Upfirst verdict](https://www.versusref.com/voice-ai/dialzara-vs-upfirst/)

### 6. Observe.AI

For outbound sales and call-center campaigns, native outbound campaign capability is the single most critical factor. [Full Observe.AI vs Level AI verdict](https://www.versusref.com/voice-ai/level-ai-vs-observe-ai/)

### 7. Replicant

For outbound sales and call-center campaigns, the single most important capability is verified native outbound campaign support. [Full Replicant vs Cresta verdict](https://www.versusref.com/voice-ai/cresta-vs-replicant/)

### 8. Smith.ai

For outbound sales campaigns, the most critical factor is whether a platform natively supports outbound campaigns. [Full Smith.ai vs Abby Connect verdict](https://www.versusref.com/voice-ai/abby-connect-vs-smith-ai/)

### 9. Telnyx Voice AI Agents

For outbound sales campaigns, native outbound campaign functionality is the deciding factor. [Full Telnyx Voice AI Agents vs Twilio ConversationRelay verdict](https://www.versusref.com/voice-ai/telnyx-voice-ai-vs-twilio-conversationrelay/)

### 10. Retell AI

Both tools support native outbound campaigns, but Retell AI has meaningful cost and scale advantages for high-volume outbound sales. [Full Retell AI vs Voiceflow verdict](https://www.versusref.com/voice-ai/retell-vs-voiceflow/)

Both tools support native outbound campaigns and warm transfer, but Retell AI adds a no-code agent builder (Vocode lacks one per b235d200) and partial white-label support versus none for Vocode (474ef2b2), which matter for sales teams and agencies. [Full Retell AI vs Vocode verdict](https://www.versusref.com/voice-ai/retell-vs-vocode/)

For outbound sales campaigns, Retell AI wins on multiple dimensions. [Full Retell AI vs Ultravox verdict](https://www.versusref.com/voice-ai/retell-vs-ultravox/)

For outbound sales campaigns, cost and accessibility matter greatly. [Full Retell AI vs Thoughtly verdict](https://www.versusref.com/voice-ai/retell-vs-thoughtly/)

Both tools support native outbound campaigns, warm transfer, and no-code builders. [Full Retell AI vs Phonely verdict](https://www.versusref.com/voice-ai/phonely-vs-retell/)

Both tools support native outbound campaigns, SIP trunking, and no-code builders. [Full Retell AI vs Millis AI verdict](https://www.versusref.com/voice-ai/millis-vs-retell/)

For outbound sales campaigns, Retell AI has native outbound campaign support while LiveKit Agents does not (facts 90744e3a vs 6ad921b6). [Full Retell AI vs LiveKit Agents verdict](https://www.versusref.com/voice-ai/livekit-agents-vs-retell/)

Retell AI has native outbound campaigns built in (fact 90744e3a), which directly matches this use case. [Full Retell AI vs Dasha verdict](https://www.versusref.com/voice-ai/dasha-vs-retell/)

For high-volume outbound sales campaigns, cost and concurrency matter most. [Full Retell AI vs Vapi verdict](https://www.versusref.com/voice-ai/retell-vs-vapi/)

### 11. Bland AI

Both tools support native outbound campaigns, but Bland AI has several concrete advantages for outbound sales. [Full Bland AI vs Voiceflow verdict](https://www.versusref.com/voice-ai/bland-vs-voiceflow/)

Both tools support native outbound campaigns and warm transfer, but Bland AI adds a no-code agent builder (Vocode has none per b235d200), making it far easier to spin up and iterate on sales scripts without engineering effort. [Full Bland AI vs Vocode verdict](https://www.versusref.com/voice-ai/bland-vs-vocode/)

For outbound sales campaigns, Bland AI offers a no-code agent builder (Ultravox lacks one, per fact 9049ca31) and barge-in interruption handling (Ultravox does not support this, per ae0eaf39), both critical for natural sales conversations. [Full Bland AI vs Ultravox verdict](https://www.versusref.com/voice-ai/bland-vs-ultravox/)

Both tools support outbound campaigns and warm transfers, but Bland AI wins on cost and accessibility for outbound sales. [Full Bland AI vs Thoughtly verdict](https://www.versusref.com/voice-ai/bland-vs-thoughtly/)

For outbound sales campaigns, Bland AI wins on multiple decisive dimensions. [Full Bland AI vs Ringly.io verdict](https://www.versusref.com/voice-ai/bland-vs-ringly/)

For high-volume outbound sales campaigns, real cost per minute is critical. [Full Bland AI vs Phonely verdict](https://www.versusref.com/voice-ai/bland-vs-phonely/)

Both tools support native outbound campaigns, no-code builders, and self-serve signup. [Full Bland AI vs Millis AI verdict](https://www.versusref.com/voice-ai/bland-vs-millis/)

Bland AI includes native outbound campaigns, warm transfer to human, and a no-code agent builder, all critical for sales workflows. [Full Bland AI vs LiveKit Agents verdict](https://www.versusref.com/voice-ai/bland-vs-livekit-agents/)

Bland AI offers native outbound campaigns (fact 3bf81179), warm transfer to human agents (436dfcde), a base concurrency of 10 calls versus Dasha's 1 call (ab3a0fe1 vs 7dac60ee), a no-code agent builder (2618ade6), and a built-in knowledge base (254d9b27). [Full Bland AI vs Dasha verdict](https://www.versusref.com/voice-ai/bland-vs-dasha/)

### 12. Vapi

For outbound sales campaigns, a purpose-built native outbound campaigns feature is the deciding factor. [Full Vapi vs Pipecat verdict](https://www.versusref.com/voice-ai/pipecat-vs-vapi/)

For outbound sales campaigns, the most critical factor is whether a platform natively supports outbound campaigns at scale, and Vapi explicitly offers native outbound campaigns while no equivalent capability is documented for Hume EVI. [Full Vapi vs Hume EVI verdict](https://www.versusref.com/voice-ai/hume-evi-vs-vapi/)

For outbound sales campaigns, native outbound campaign support is the deciding factor. [Full Vapi vs Dograh verdict](https://www.versusref.com/voice-ai/dograh-vs-vapi/)

Both platforms support native outbound campaigns, so that capability is a wash. [Full Vapi vs Deepgram Voice Agent API verdict](https://www.versusref.com/voice-ai/deepgram-voice-agent-api-vs-vapi/)

For outbound sales campaigns, the most critical capability is native outbound campaign management. [Full Vapi vs OpenAI Realtime API verdict](https://www.versusref.com/voice-ai/openai-realtime-api-vs-vapi/)

For outbound sales campaigns, a dedicated native outbound campaigns feature is the deciding factor. [Full Vapi vs Twilio ConversationRelay verdict](https://www.versusref.com/voice-ai/twilio-conversationrelay-vs-vapi/)

Both tools support native outbound campaigns, but Vapi edges ahead on cost structure and infrastructure. [Full Vapi vs Voiceflow verdict](https://www.versusref.com/voice-ai/vapi-vs-voiceflow/)

Both tools support native outbound campaigns and warm transfer to human agents. [Full Vapi vs Vocode verdict](https://www.versusref.com/voice-ai/vapi-vs-vocode/)

Both tools support native outbound campaigns, SIP trunking, and warm transfer. [Full Vapi vs Ultravox verdict](https://www.versusref.com/voice-ai/ultravox-vs-vapi/)

Both tools support native outbound campaigns, but Vapi charges $0 per month versus Thoughtly's $500 per month, making it far more accessible for cost-sensitive sales teams. [Full Vapi vs Thoughtly verdict](https://www.versusref.com/voice-ai/thoughtly-vs-vapi/)

Vapi has native outbound campaign support, while Ringly.io explicitly does not. [Full Vapi vs Ringly.io verdict](https://www.versusref.com/voice-ai/ringly-vs-vapi/)

Both tools support native outbound campaigns, warm transfer, and no-code builders. [Full Vapi vs Phonely verdict](https://www.versusref.com/voice-ai/phonely-vs-vapi/)

Both tools support native outbound campaigns and no-code builders. [Full Vapi vs Millis AI verdict](https://www.versusref.com/voice-ai/millis-vs-vapi/)

Vapi natively supports outbound campaigns while LiveKit Agents does not (facts 2ad82640 vs 6ad921b6). [Full Vapi vs LiveKit Agents verdict](https://www.versusref.com/voice-ai/livekit-agents-vs-vapi/)

Vapi offers native outbound campaign support, 10 concurrent calls on the base plan versus Dasha's 1, and a lower base price of $0.05/min versus Dasha's $0.08/min. [Full Vapi vs Dasha verdict](https://www.versusref.com/voice-ai/dasha-vs-vapi/)

### 13. Assort Health

Both platforms support native outbound campaigns, so that capability does not separate them. [Full Assort Health vs Hello Patient verdict](https://www.versusref.com/voice-ai/assort-health-vs-hello-patient/)

### 14. Bolna

Both platforms support native outbound campaigns, warm transfer, and pass LLM/TTS costs through at cost. [Full Bolna vs Vapi verdict](https://www.versusref.com/voice-ai/bolna-vs-vapi/)

### 15. Salient

Both tools support native outbound campaigns, so that capability is a draw. [Full Salient vs Domu verdict](https://www.versusref.com/voice-ai/domu-vs-salient/)

### 16. Avoca

Both tools natively support outbound campaigns, so that critical capability is matched. [Full Avoca vs Netic verdict](https://www.versusref.com/voice-ai/avoca-vs-netic/)

### 17. Phonely

For outbound sales campaigns, native outbound campaign support is the deciding factor. [Full Phonely vs Rosie verdict](https://www.versusref.com/voice-ai/phonely-vs-rosie/)

Phonely includes native outbound campaigns (ac536a15), warm transfer to human agents (61b8db21), a built-in knowledge base (3c8a3bfd), DTMF/IVR navigation, and native number provisioning, all directly relevant to outbound sales call-center workflows. [Full Phonely vs ElevenLabs Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-phonely/)

### 18. OpenAI Realtime API

For outbound sales campaigns, connecting to existing phone infrastructure is a critical practical requirement. [Full OpenAI Realtime API vs Google Gemini Live API verdict](https://www.versusref.com/voice-ai/gemini-live-api-vs-openai-realtime-api/)

### 19. Thoughtly

Thoughtly includes native outbound campaigns (fact 71644153), warm transfer to human agents (fact a811b00b), 200+ native integrations including HubSpot and Salesforce (fact 47704dd3), a built-in knowledge base, and native SIP trunking. [Full Thoughtly vs ElevenLabs Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-thoughtly/)

### 20. Voiceflow

Voiceflow has native outbound campaigns support (f2404772), which directly serves outbound sales and call-center use cases. [Full Voiceflow vs ElevenLabs Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-voiceflow/)

### 21. Pipecat

For outbound sales campaigns, the most critical attribute is native outbound campaign support. [Full Pipecat vs LiveKit Agents verdict](https://www.versusref.com/voice-ai/livekit-agents-vs-pipecat/)

### 22. Cresta

For outbound sales campaigns, the ability to plug into existing call-center infrastructure matters most. [Full Cresta vs ASAPP verdict](https://www.versusref.com/voice-ai/asapp-vs-cresta/)

### 23. PolyAI

Enterprise voice assistants. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 24. Alex (fka Apriora)

'Interview everyone. Hire the best.' - autonomous AI interviewer (voice + video) for high-volume hiring, operated by Apriora Inc. dba Alex. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 25. ConverzAI

'World's Leading Automation for Staffing Firms' - agentic virtual recruiters covering the pipeline from sourcing to placement, staffing-agency (not corporate HR) focus. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 26. Loman AI

Restaurant voice AI with deep POS order-writing (Toast/Square/Clover/Olo etc.) - orders and payments, not just reservations and FAQs. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 27. Numa

AI operating system for the AI-native dealership - voice AI plus agentic follow-up (Heat Case, Opportunity, Service Advisor agents) for franchise dealers and multi-rooftop groups. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 28. Omilia

Conversational AI platform for contact-center voice/IVR automation, with native 'Lexis' voice synthesis and agentic voice/chat agents. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 29. Patter

MIT-licensed, self-host-only voice AI SDK (Python + TypeScript) abstracting 27+ providers across LLM/STT/TTS/carrier layers - a middle ground between hosted platforms (Vapi/Retell) and heavyweight frameworks. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 30. Sameday

Trades-focused AI sales agent - sells and books jobs (claims 92%+ booking rate, voice cloning of your staff) rather than just taking messages. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 31. Slang AI

Hospitality-native voice AI ('Superhost') priced per location - reservation-system depth and guest recognition rather than generic receptionist features. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 32. Zoom Virtual Agent Receptionist

Big-tech price anchor for the receptionist segment: standalone AI receptionist at $29.99/mo (100 min), launched 2026-07-09; also bundled free with Zoom Phone. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 33. ElevenLabs Agents

Ringly.io explicitly lacks native outbound campaign support, whereas no such restriction is noted for ElevenLabs Agents. [Full ElevenLabs Agents vs Ringly.io verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-ringly/)

LiveKit Agents explicitly lacks native outbound campaign support (fact 6ad921b6), which is a core requirement for outbound sales and call-center work. [Full ElevenLabs Agents vs LiveKit Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-livekit-agents/)

For outbound sales campaigns at scale, per-minute cost and concurrency are critical. [Full ElevenLabs Agents vs Dasha verdict](https://www.versusref.com/voice-ai/dasha-vs-elevenlabs-agents/)

### 34. Millis AI

For outbound sales campaigns, Millis AI offers native outbound campaign support and native SIP trunking, which are directly relevant features. [Full Millis AI vs ElevenLabs Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-millis/)

### 35. Ultravox

For outbound sales campaigns, Ultravox offers native outbound campaign support (fact 82367d69), warm transfer to human agents (fact deec6680), a built-in knowledge base (fact f1834a86), native SIP trunking (fact f34fa10e), and DTMF/IVR navigation (fact 2f574526). [Full Ultravox vs ElevenLabs Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-ultravox/)

### 36. Vocode

Vocode has vendor-confirmed native outbound campaigns support, plus native SIP trunking and warm transfer to human, all critical for outbound sales call-center workflows. [Full Vocode vs ElevenLabs Agents verdict](https://www.versusref.com/voice-ai/elevenlabs-agents-vs-vocode/)

### 37. Hume EVI

Emotionally intelligent speech-to-speech API (Empathic Voice Interface, EVI 3 / EVI 4 mini) with voice cloning and supplemental-LLM support. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 38. Parloa

AI Agent Management Platform (AMP) for enterprise contact centers - design, test, scale, optimize agentic AI. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 39. Rosie

Self-serve SMB AI answering service with bundled-minute pricing and bilingual EN/ES on every plan. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 40. Toma

"AI Coworkers for the Automotive Enterprise" - dealership call automation with production safeguards, YC/a16z-backed. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 41. Abby Connect

Legacy virtual-receptionist provider (est. 2005) adding a lower-cost AI tier with built-in human backup; minute-bundle pricing on both lines. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 42. Arini

The AI front desk for dental groups and DSOs - zero missed calls, 24/7. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 43. ASAPP

Generative AI CX platform whose GenerativeAgent overlays existing CCaaS stacks to automate voice and messaging interactions. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 44. Brooke.ai

OEM-channel digital voice assistant for fixed ops - a sub-brand of Proactive Dealer Solutions (Better Car People), sold through programs like Stellantis MarketCenter rather than as a standalone startup. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 45. Dasha

Dev platform, conversational AI. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 46. Deepgram Voice Agent API

Unified STT + LLM orchestration + TTS voice-agent pipeline at a flat all-in rate ($4.50/hr), with BYO-LLM/TTS discounts and enterprise deployment options. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 47. Dograh

Self-hostable open-source voice agent platform ('OSS alternative to Vapi & Retell') with a no-code workflow builder and air-gapped on-prem deployment for regulated industries. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 48. Domu

YC S24 collections-automation platform for financial institutions across the Americas - 'compliance is not a checkbox, it is the architecture'. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 49. Google Gemini Live API

Native-audio speech-to-speech model API (Gemini Live) with barge-in, affective dialog, and tool use over a stateful WebSocket. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 50. Hello Patient

Conversational AI for healthcare's 'front door' - voice, SMS, and chat patient communication. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 51. Kore.ai

Enterprise agentic AI platform (Artemis) with voice AI agents for contact-center self-service at Global 2000 scale. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 52. Level AI

LLM-native contact-center intelligence platform (QA/Agent Assist center of gravity) with an AI Virtual Agent for voice and chat automation. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 53. LiveKit Agents

Realtime infra + agents (OSS + cloud). No won verdicts for this use case yet; it ranks on ties and near-misses.

### 54. Netic

Autonomous AI revenue engine for essential home services. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 55. Ringly.io

Ecommerce phone agents. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 56. Sierra

Outcome-priced conversational AI agent platform from Bret Taylor and Clay Bavor; voice product replaces IVR with an empathetic agent. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 57. Twilio ConversationRelay

Carrier-grade voice harness for BYO-LLM agents inside Twilio Programmable Voice. No won verdicts for this use case yet; it ranks on ties and near-misses.

### 58. Upfirst

Per-call-bundle AI receptionist with 35+ languages and declining overage rates up to 600 calls/mo. No won verdicts for this use case yet; it ranks on ties and near-misses.

Source: https://www.versusref.com/voice-ai/best/outbound/