What is PromptKnit?
Design and test prompts across GPT and Claude without an API key.
Who is PromptKnit best for?
PromptKnit is best for developers and prompt designers who want to test prompts on OpenAI and Claude models.
Testing function calls
The conversation editor lets you edit a function schema and fake the function's reply, so you can check a tool-calling prompt before writing any code.
Comparing prompt versions
Inline variable groups run one prompt with different inputs side by side, and every edit is kept so you can compare and restore earlier versions.
Trying models without your own keys
Runs are paid from the plan's monthly credits, so you can start testing without an OpenAI or Anthropic API key.
Small teams sharing prompts
Projects group prompts by use case with member access levels, and PromptKnit generates code to drop a finished prompt into your app.
How much does PromptKnit cost?
PromptKnit has a free Starter plan with 100 credits a month, and its paid plans cost $10 a month for Plus or $30 a month for Pro, or $7 and $21 a month billed yearly.
- 2 projects with 4 prompts each
- 100 credits a month on basic models
- Function call simulation, 3-day prompt history
- 5 projects with 30 prompts each
- 2,000 credits a month, GPT-4 and all models, image prompts
- Unlimited runs with your own API keys, 30-day history
- Unlimited projects and prompts
- 10,000 credits a month, member access control
- Unlimited prompt history, onboarding and 1:1 chat support
Billed yearly, Plus is $7 a month and Pro $21 a month, 30% less than paying monthly. The pricing page does not say how much a single run costs in credits. Full pricing on promptknit.com. We checked these prices on .
How do readers rate PromptKnit?
No one has rated PromptKnit yet. Be the first.
Sign in to rate. One rating per account.
What are the best PromptKnit alternatives?
Three tools on Recaply do PromptKnit's job.
Questions about PromptKnit
What is PromptKnit?
Design and test prompts across GPT and Claude without an API key.
Who is PromptKnit for?
PromptKnit is best for developers and prompt designers who want to test prompts on OpenAI and Claude models.
Is PromptKnit free?
Yes. PromptKnit's Starter plan is free with no end date and includes 2 projects, 4 prompts per project, 100 credits a month and basic models. GPT-4 access, more projects and runs with your own API keys start with Plus at $10 a month.
How much does PromptKnit cost?
PromptKnit's paid plans are Plus at $10 per month and Pro at $30 per month.
What are the best PromptKnit alternatives?
The closest alternatives on Recaply are PromptGround, PromptPoint and Quartzite.
Where can I try PromptKnit?
On its official website, promptknit.com.
TestDriver
Claude Code Review
testRigor
Testsigma
Claude Security
Harness AI Test Automation