Free while you build. Pro when your team ships.
Every tool on this site is free and stays free. Paid plans will cover what needs a server: runs on a schedule, a shared workspace, CI and credits. They are not built yet. Join the waitlist and tell us which one you need first.
Free
$0 forever
For anyone writing or shipping prompts. Available today.
- All ten tools: Prompt Grader, Robot-Speak Checker, Fact Check List, Safe Paste, Model Compare, Prompt Tester, Chatbot Safety Test, AI Cost Calculator, Version Compare and My Prompts
- Unlimited use with your own API keys, or free keys from Google AI Studio, OpenRouter and Groq
- Local library with version history, suites and results
- Export everything as JSON or CSV; share links that carry no data to us
Pro Planned
$19 per month, planned
For people who own prompts in production.
- Everything in Free
- Scheduled regression runs of your test suites, with an email when a pass rate drops
- Re-run suites automatically when a provider ships a new model
- Sync across your devices, with longer run history
- Managed model credits, so no key is needed
- Prompt CI: run suites from the command line or GitHub Actions
- Price alerts: an email when a model you use changes price or a cheaper one passes your tests
- Spend tracking: import your provider’s usage export and compare real spend with your estimates
Team Planned
$49 per seat per month, planned
For teams that review prompt changes like code.
- Everything in Pro
- Shared library and suites for the whole team
- Shared budgets and saved cost scenarios, with a monthly spend report
- Review and approval of prompt changes, with the eval evidence attached
- Roles, audit log and single sign-on
- Priority support
Planned prices and features may change before launch. Green marks are available today; outlined marks are planned.
Tell us what to build first
We build the paid plans in the order people ask for them. One email when your pick is ready; nothing else.
- Why not paid now? We would rather charge for something you asked for than guess.
- Will the free tools change? No. They run in your browser and cost us almost nothing to serve.
Questions about paying
What do I pay for today?
Nothing to us. When a tool calls a model, your provider bills that call to your key at its normal price. The AI Cost Calculator shows what a prompt will cost before you run it.
Can I use it without paying any provider?
Yes. Google AI Studio and Groq give free keys with rate limits, and OpenRouter offers free models. Every tool works with them. Free tiers may log what you send, so keep sensitive data off them.
Will my local data move to Pro?
That is the plan: export from Settings and import into your Pro workspace. Nothing leaves your browser unless you choose to move it.