Bolna Review
Open-source voice-agent orchestration with a hosted platform priced for Indian-language call volume.
Among the 13 voice ai tools we track, Bolna has the 3rd-highest included concurrency and the 6th-lowest latency - a fit for high-traffic deployments and real-time, conversational apps.
From $0.06/min
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What we know about Bolna
Bolna is a voice ai platform: open-source voice-agent orchestration with a hosted platform priced for Indian-language call volume. This profile tracks every Bolna fact we have verified, each linked to a primary source and dated.
On pricing, Bolna starts at $0.06 per minute for its entry tier. That is the sticker rate: real production cost usually runs higher once you add a language model, a voice provider, and telephony minutes.
New Bolna accounts get $5 in free credits on signup to test with before a card is required, which is enough to run a handful of real calls and judge latency and voice quality for your own script rather than a demo.
On capabilities, Bolna covers llm/tts costs passed through at cost?, bring-your-own llm, bring-your-own tts voice, native outbound campaigns, warm transfer to human, and built-in knowledge base. Each of those is verified against Bolna's own docs or dashboard, not marketing copy.
On performance, Bolna reports a median end-to-end latency around 300 ms (vendor claim) and 100 concurrent calls concurrent calls on the base plan. Latency figures are vendor claims until we measure them ourselves, and they are labeled that way on the Bolna fact sheet, so treat them as a starting point rather than a guarantee.
Placed against the 13 voice ai tools we track, Bolna's strongest showing is the 3rd-highest included concurrency, while it trails at 24th on languages - a spread worth weighing against your own priorities.
In total we track 19 verified facts for Bolna today, each linking the primary source it came from so you can check our work - and vendor claims we have not measured ourselves are labeled as such on the Bolna fact sheet below.
Reviewed by vsref Editorialfacts verified Jul 30, 2026Methodology →
Bolna pricing
≈ $0.06 per minute all-in (est.), verified Jul 30, 2026 (source).
| Monthly volume | All-in monthly bill |
|---|---|
| 1K min/moSolo builder | $60 |
| 10K min/moAgency | $600 |
| 100K min/moCall center | $6,000 |
All-in monthly: platform fee + per-minute + telephony. Assumes GPT-4o class model, ElevenLabs voice. How we compute costs →
Fact sheet
Every row independently verifiedConsidering a switch? Best Bolna alternatives →
TTS in this stack
Bolna lets you bring your own text-to-speech voice, so the voice engine is a separate pricing and quality decision. Compare the engines builders plug in most: ElevenLabs, Cartesia, OpenAI TTS, or the full text-to-speech comparison →
STT in this stack
A voice agent hears through its speech-to-text engine, and transcription accuracy and streaming latency are priced per audio minute. Compare the engines builders pair with Bolna: Deepgram, AssemblyAI, GPT-4o Transcribe, or the full speech-to-text comparison →