Dia / Dia2 Review
OSSBest-known open model for scripted two-speaker dialogue rather than narration - Apache-2.0, English-only, GPU-oriented.
Among the 46 text-to-speech tools we track, Dia / Dia2 has the 43rd-widest language coverage.
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What we know about Dia / Dia2
Dia / Dia2 sits in the text-to-speech apis category, where it is best-known open model for scripted two-speaker dialogue rather than narration - Apache-2.0, English-only, GPU-oriented. We keep this Dia / Dia2 profile grounded in primary sources, each fact dated to when we last confirmed it.
Dia / Dia2 does not publish a public per-minute rate we have been able to verify, so the price figure here stays blank until we can confirm one. We would rather show nothing than a guessed number; if you have a current Dia / Dia2 quote, it is the fastest way for us to close that gap.
On capabilities, Dia / Dia2 covers streaming audio output, instant voice cloning, emotion / style controls, and self-host / on-prem option. Each of those is verified against Dia / Dia2's own docs or dashboard, not marketing copy.
Dia / Dia2 ranks the 43rd-widest language coverage of the 46 text-to-speech tools we track, so where it lands for you depends on which of those matters more.
In total we track 12 verified facts for Dia / Dia2 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 Dia / Dia2 fact sheet below.
Reviewed by vsref Editorialfacts verified Jul 20, 2026Methodology →
Fact sheet
Every row independently verifiedConsidering a switch? Best Dia / Dia2 alternatives →
STT in this stack
Text-to-speech is half of a voice pipeline: the other half is the speech-to-text that listens. Compare transcription engines on accuracy, streaming latency, and per-minute price: Deepgram, AssemblyAI, GPT-4o Transcribe, or the full speech-to-text comparison →
Voice agents in this stack
The engine is one layer: a voice agent speaks through its text-to-speech engine, but orchestration, telephony, and turn-taking come from the agent platform. Compare the platforms builders pair Dia / Dia2 with: Pipecat, OpenAI Realtime API, Twilio ConversationRelay, or the full voice-agent comparison →
Distribute it
Most Dia / Dia2 voiceover ends up in short-form video, and publishing that video across TikTok, YouTube, and Instagram is a scheduling problem with real per-channel pricing. Compare the schedulers creators actually run: Buffer, Postiz, Mixpost, or the social media scheduling platforms compared →
Avatar video in this stack
A cloned or bring-your-own Dia / Dia2 voice does not have to stay audio-only: AI avatar video platforms lip-sync it onto a talking avatar for finished video. Compare the platforms: HeyGen, Synthesia, Hedra, or the full avatar-video comparison →