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Alternatives

Products that do what AssemblyAI: Universal-3 Pro Streaming does

The most accurate streaming speech model for voice agents.

  1. 1

    The first of its kind promptable speech language model

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  2. 2

    Voice agents powered by Simba 3.2 the world's #1 voice model

    Jul 2026 · speechify.ai

  3. 3IB

    I built a voice agent from scratch that averages ~400ms end-to-end latency (phone stop → first syllable). That’s with full STT → LLM → TTS in the loop, clean barge-ins, and no precomputed responses. What moved the needle: Voice is a turn-taking problem, not a transcription problem. VAD alone fails; you need semantic end-of-turn detection. The system reduces to one loop: speaking vs listening. The two transitions - cancel instantly on barge-in, respond instantly on end-of-turn - define the experience. STT → LLM → TTS must stream. Sequential pipelines are dead on arrival for natural…

    Mar 2026 · ntik.me

  4. 4

    Tighter instruction adherence in speech agents

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  5. 5
    Qwen3-TTS155

    Voice design, cloning & 97ms streaming

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  6. 6

    Text-to-Speech built for Voice Agents

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  7. 7MO

    I wanted to share our new speech to text model, and the library to use them effectively. We're a small startup (six people, sub-$100k monthly GPU budget) so I'm proud of the work the team has done to create streaming STT models with lower word-error rates than OpenAI's largest Whisper model. Admittedly Large v3 is a couple of years old, but we're near the top the HF OpenASR leaderboard, even up against Nvidia's Parakeet family. Anyway, I'd love to get feedback on the models and software, and hear about what people might build with it.

    Feb 2026 · github.com

  8. 8

    One API to build production-ready voice agents

    Apr 2026

  9. 9

    Fast, accurate STT for production-grade voice agents

    May 2026 · ringg.ai

  10. 10

    Create realistic AI Voiceovers within seconds

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  11. 11

    The fastest generative AI Text-to-Speech API

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  12. 12

    Our most capable voice agent is now available via API

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  13. 13

    Real Expressive AI Voices

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  14. 14

    Highly expressive and natural speech generation model

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  15. 15
    Voicebox216

    An all-in-one generative Al model for speech

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  16. 16

    Voice AI that feels as good as it sounds

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  17. 17

    Generate English subtitles for videos in any language

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  18. 18

    Generating uncanny AI avatars is now open source

    May 2026 · avaturn.live

  19. 19

    Level Up Your Audio with Realistic AI Voices

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  20. 20

    Multilingual TTS model with realistic and expressive speech

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  21. 21
    VoiceAI116

    Capture every conversation

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    Dub live streams in 150+ languages, instantly

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  23. 23

    Hume AI's new voice that truly understands emotion

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  24. 24
    GPT-Live211

    Full-duplex voice for ChatGPT

    Jul 2026 · openai.com

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