All your AI models.
One workspace.
Chat with GPT, Claude, Gemini, and more — side by side. Save your best prompts and reuse them anywhere. No API key required to start.
Works with the models you already use
OpenAI, Anthropic, Google, DeepSeek, Mistral, xAI, Groq, Perplexity — and more.
One workspace for every way you use AI
Chat, compare, and reuse your best prompts — across every provider, on the web and in your browser.
Chat with every model from one place
Switch between GPT, Claude, Gemini, and more mid-conversation, side by side in a multi-pane workspace.
Your best prompts, one click away
Save, organize, and reuse prompts with folders, stars, and instant search — synced across web and extension.
Two answers at once
Run one prompt against two models and pick the better answer.
On every page
Open Vellio from any tab in Chrome and Firefox.
Vellio in your pocket
Native iOS and Android apps are on the roadmap — chat, prompts, and your library wherever you are.
Compare two models, side by side
Run the same prompt against two models and switch tabs to compare answers. No sign-up needed to look around — this preview is scripted.
Press Run to see GPT-5.5 answer.
Responses above are a scripted preview.
Vellio is in private beta
We're onboarding builders in small batches. Join now and help shape what comes next.
“I cancelled three separate AI subscriptions. Vellio gives me all of them in one tab, and my prompt library finally lives somewhere sane.”
“The side-by-side compare is the thing I didn't know I needed. I pick the better answer in seconds instead of copy-pasting between tabs.”
“Onboarding got me chatting with two models within a minute, no API key wrangling required.”
Beta-tester quotes, shared with permission.
Simple pricing, scales with you
Start free. Upgrade when you want unlimited prompts and live AI chat.
Free
- Up to 10 prompts
- Search and tag filtering
- Browser extension and web app
- Save provider API keys
Pro
- Unlimited prompts
- Full search and tags
- Live AI chat (OpenAI & Anthropic)
- Your own API keys — you pay providers
- 2,000 hosted credits per month on Vellio keys
- Manage billing in Stripe portal
Pro+
- Everything in Pro
- 8,000 hosted credits per month on Vellio keys
- Best for teams and heavy hosted-AI usage
- Manage billing in Stripe portal
See full plan details on the pricing page.
One workspace for all your AI. Start in seconds.
Free to try, no credit card. Bring your own keys or use hosted credits.