A/B Test Prompt Templates.
Rank What Actually Works.
Send the same query through multiple prompt templates across AI providers, compare outputs side-by-side, and surface the highest-performing variants with custom scoring.
Start Testing Prompts — $39/moCancel anytime. No credit card lock-in.
Parallel Runs
Fire the same query through all templates simultaneously and collect results in seconds.
Custom Scoring
Define your own rubric — relevance, tone, length, accuracy — and auto-rank every variant.
Performance History
Track which templates win over time and spot regressions before they reach production.
Simple Pricing
Pro
$39
/month
- ✓Unlimited prompt templates
- ✓A/B tests across GPT-4, Claude, Gemini
- ✓Custom scoring rubrics
- ✓Performance history & trend charts
- ✓CSV export of all results
- ✓Priority support
FAQ
Which AI providers are supported?
PromptRanker works with OpenAI (GPT-4o, GPT-4), Anthropic (Claude 3.5), and Google (Gemini 1.5 Pro). You bring your own API keys — we never store them.
How does the scoring system work?
You define weighted criteria (e.g. relevance 40%, conciseness 30%, tone 30%). Each output is scored automatically using an LLM judge, then ranked. You can override scores manually.
Can I cancel my subscription anytime?
Yes. Cancel from your account dashboard at any time. You keep access until the end of your billing period with no questions asked.