OneChater — AI chat with GPT, Claude and Gemini in one place, with a persistent memory that follows you across every model
The only AI chat app that doesn't forget you when you switch models. GPT, Claude and Gemini in one place, with a memory that travels with you.
Works with
2,400+ professionals worldwide · BYOK · 0% fee
Up and running in 60 seconds
No complicated setup. No subscriptions to manage. Paste your keys and get started.
Connect your API keys
Paste your OpenAI, Anthropic or Google keys. They're encrypted and tied to your account, restored on any device when you log in. Set it up once, forever.
Chat with every model
Write once and get answers from GPT, Claude and Gemini in real time, side by side. Compare them and pick the best.
Memory learns as you go
After every chat, OneChater extracts what matters: projects, preferences, decisions. Next time, every model already knows you.
Never repeat yourself to your AI again
OneChater builds a private memory for every user, so your assistants remember your preferences, projects, goals and long-term context.
A single memory shared across all your AI models, keeping context consistent everywhere.
Personal Memory
Every user gets an independent memory. Information is stored only to improve the quality of their conversations.
Continuous Context
Switch between GPT, Claude, Gemini or other models without losing important information about you or your projects.
Progressive Learning
OneChater can remember relevant details shared in earlier conversations to deliver more consistent, personalized answers.
Persistent Preferences
Writing style, technical preferences, active projects and settings can carry over between sessions.
Privacy First
Your memory is tied to your account only and is never shared with other users.
Full Control
You can review, edit or delete the stored information at any time.
Users keep full control over their information. Memory exists to improve your experience and can be managed from the settings panel.
Every model you use
Connect your own API key for each provider and pay them directly.
+ Amazon Bedrock, Azure OpenAI, Replicate and any OpenAI-compatible endpoint
The best of every AI, fused into one answer
Send your prompt once. GPT, Claude and Gemini answer simultaneously. OneChater's Fusion mode synthesizes all three into one superior, sharper response — automatically.
Write once
Your prompt is sent to GPT, Claude and Gemini simultaneously. No switching tabs, no copy-pasting.
Three answers in parallel
All three models respond in real time, side by side. See their different approaches instantly.
One fused response
Fusion mode analyzes all three answers and synthesizes the best parts into a single, superior response.
Fusion mode uses your own API keys — you pay providers directly, zero markup.
Simple, transparent pricing
You already pay for your API keys. OneChater should be affordable too.
Start with zero friction. No credit card required.
- Free-AI providers only (Groq, OpenRouter, Mistral, Gemini)
- Personal memory profile
- 1 project
- Conversation history
- Community support
For professionals who live in AI every day.
- Every provider — bring any API key
- Unlimited memory profile
- Semantic history search
- Unlimited projects
- Cross-device sync
- Full spend dashboard
- Priority support
For teams that want AI with shared context.
- Everything in Pro
- Up to 10 members
- Shared prompt library
- Team memory
- SSO / SAML
- Dedicated Slack support
Ready to unify your
AI workflow?
Join thousands of professionals and freelancers who use OneChater to get the most out of every AI model — with one memory that connects them all.
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