Give your stream an AI character that talks back.
StreamBuddy is an AI character viewer and companion app. Your character watches your stream, responds with live voice, appears on screen with a PNGTuber avatar and subtitles, and remembers your community — a co-host with a personality, not just a chatbot.
Everything your character needs to come alive
Turn an AI model into a character your community knows by name.
Live voice responses
Your character hears what's happening and replies out loud in real time, in a voice you choose — Azure, OpenAI, or free gTTS.
- Real-time spoken responses
- Choose its voice & personality
On-stream overlays
Upload your own avatar, and connect it through an OBS browser source to display it on your stream.
- PNGTuber avatar overlay
- Live subtitlesy
Native Twitch integration
Connect your Twitch channel and your character reacts live to chat, subscriptions, and channel-point and extension events.
- Reacts to chat, subs & events
- Twitch extension support
Memory & control
Your character builds a memory of your community and grows with it, and you stay in control of how it behaves.
- Per-character memory
- Fine-tune how it responds
Stays in character
You frame the world your character lives in, so it understands its own context and never breaks character — whether it's a sarcastic gremlin, a dramatic space pirate, or a wizard who insists everything is a prophecy.
- Define its world & persona
- Consistent, in-character responses
Share with friends
Invite your friends into your character's session so they can join in, chat, and be part of the show — and your character remembers each of them by name across streams.
- Bring friends into your session
- Remembers people in your community
Start free. Upgrade when you're ready to host.
Join and use other creators' sessions for free. To host your own character, the Standard plan includes $10 of usage every month, then bills only for what you use.
Good to know
What does StreamBuddy do?
It runs an AI character that co-hosts your stream — it responds with live voice, appears on screen as a PNGTuber with subtitles, reacts to your Twitch chat and events, and remembers your community.
Is it free?
You can join and use other creators' sessions for free. Hosting your own character requires a paid plan. Standard includes $10 of usage each month.
How does billing work?
Securely through Stripe. Your plan includes a monthly usage credit; anything beyond it is billed on what you use. See the pricing page for details.
Can I cancel anytime?
Yes — from the billing portal at any time, and you keep access through the end of your current period. See the Refund & Cancellation Policy.
Questions? Talk to us.
Send us a message and we'll get back to you.
Reach us directly
Prefer email or post? Any of these work.
Spokane, WA 99201-0581
United States