Git-like version control for AI prompts

Stop Guessing Which Prompt Actually Works

Visual side-by-side diff viewer for AI prompt iterations. Track performance metrics, run A/B tests, and manage prompt history with a Git-like branching interface.

Start for $15/moLearn More
prompt-v2 → prompt-v3 · accuracy +12% · latency -80ms
v2 — Before
- You are a helpful assistant. Answer the user question.
Respond in plain text only.
- Keep it short.
v3 — After
+ You are an expert assistant. Answer concisely and accurately.
Respond in plain text only.
+ Use bullet points for lists. Max 3 sentences.
⎇

Git-like Branching

Branch, merge, and tag prompt versions just like code.

📊

Performance Metrics

Track accuracy, latency, cost, and custom KPIs per version.

🔬

A/B Testing

Run controlled experiments and compare prompt variants statistically.

Simple Pricing

Pro
$15
per month
  • ✓ Unlimited prompt versions
  • ✓ Side-by-side diff viewer
  • ✓ Performance metrics dashboard
  • ✓ A/B testing with statistics
  • ✓ Git-like branching & tagging
  • ✓ Team collaboration (up to 5)
  • ✓ API access
Get Started

FAQ

Which LLM providers are supported?

PromptDiff works with any LLM — OpenAI, Anthropic, Mistral, Cohere, and custom models. You bring your API keys; we handle the versioning and metrics.

How does A/B testing work?

Define two prompt variants, set a traffic split, and run them against real or synthetic inputs. We compute statistical significance so you know when a winner is clear.

Can I cancel anytime?

Yes. Cancel from your billing dashboard at any time. You keep access until the end of your billing period with no hidden fees.