Test AI Prompt Templates
with Every Variable Combo
Define prompt templates with variables, auto-generate all combinations, call AI APIs, and visualize results — all in one place.
Get Access — $19/moCancel anytime. Instant access after payment.
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Template Editor
Write prompts with {{variable}} placeholders and define value sets per variable.
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Auto Combinations
Cartesian product engine generates every combination and runs them in parallel.
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Results Grid
Compare outputs side-by-side, score responses, and export to CSV.
Simple Pricing
Pro
$19
/month · billed monthly
- ✓ Unlimited prompt templates
- ✓ Up to 500 combinations per run
- ✓ OpenAI & Anthropic API support
- ✓ CSV export & result scoring
- ✓ Priority support
FAQ
Do I need to provide my own AI API keys?
Yes. You bring your own OpenAI or Anthropic API key. We never store your keys — they stay in your browser session.
How many variable combinations can I test at once?
Pro accounts can run up to 500 combinations per batch. Each combination is sent as a separate API call in parallel.
Can I cancel my subscription at any time?
Absolutely. Cancel from your Lemon Squeezy customer portal with one click. No questions asked.