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>log in to commentHi! STREAM-MATE — An in-character AI co-host for Twitch and YouTube: live chat,…. Open source, MIT. Source, docs and issue tracker: https://streammate.bond/. Feedback on the rule set is welcome.
STREAM-MATE is an in-character AI co-host for Twitch and YouTube with live chat, realtime voice and on-screen avatar.
- for
- Streamers who want AI-assisted, moderated on-air interaction.
- pricing
- open source
Key features
- Live chat AI — Generates AI replies to live chat messages in real time.
- Realtime voice — Speaks generated replies using a voice synthesizer during the stream.
- On-screen avatar — Displays a customizable avatar that lip-syncs with the AI voice.
- Reply moderation — Every AI reply is checked before it is broadcast to prevent unwanted content.
- Bilingual UI — Interface available in English and Russian.
- Web-based — Runs in the browser, no local installation required.
- MIT licensed — Open-source code under an MIT license.
- Standard-library first — Reads only the data you point it at and does not send data elsewhere.
Use cases
- Add an AI co-host to a Twitch stream for interactive chat responses.
- Provide a bilingual AI avatar for YouTube live broadcasts.
- Moderate AI-generated voice replies to keep streams safe.
- Create a consistent on-screen character that engages viewers.
- Run the tool locally via the web interface without external data transmission.
STREAM-MATE vs alternatives
 STREAM-MATE |  ElevenLabs |  Piper TTS |  Coqui TTS |  Rubii AI | |
|---|---|---|---|---|---|
| Best for | AI co-host with moderation for live streams | Voice cloning and TTS | Fast local TTS | Deep-learning TTS | AI role-play bots |
| Pricing | Open source | Subscription | Free | Free | Subscription |
| DevHunt upvotes | 1 | 0 | 0 | 0 | 3 |
| Launched | Oct 2031 | — | — | — | Nov 2024 |
- STREAM-MATE vs ElevenLabs: ElevenLabs provides high-quality voice cloning but no chat moderation or avatar.
- STREAM-MATE vs Piper TTS: Piper TTS is a local neural TTS engine, lacking live chat and avatar features.
- STREAM-MATE vs Coqui TTS: Coqui TTS offers open-source speech synthesis but no integrated streaming co-host.
- STREAM-MATE vs Rubii AI: Rubii AI focuses on AI role-play with voice and image generation, not specifically for live stream moderation.
STREAM-MATE FAQ
What platforms does STREAM-MATE support?+
It works with Twitch and YouTube live streams.
How are AI replies moderated?+
Each generated reply is checked by a rule-based filter before being sent to the stream.
Does the tool send any data to external services?+
No, it reads only the data you point it at and does not transmit anything elsewhere.
Is STREAM-MATE free to use?+
Yes, the source code is MIT licensed and freely available.
Can I use STREAM-MATE in Russian?+
The UI is available in both English and Russian.
Summarized by DevHunt from ameobius-products.ameobius-lane.workers.dev · Oct 24, 2026. Details may change; check the official site.
