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A/B Prompt Tester

Test and compare AI prompts side-by-side

You're a developer. You don't need another tool that gets in the way. A/B Prompt Tester is test and compare ai prompts side-by-side — built by devs, for devs. No fluff.

Start Free — Bring Your API Key Try with a free Gemini key →

Why This Is Different

You've spent more time debugging your AI integration than building features. A/B Prompt Tester doesn't add complexity — it removes it. Test and compare ai prompts side-by-side. Clean. Fast. No bloat.

What You Get

✅ A/B Prompt Tester — Test and compare AI prompts side-by-side
✅ Your own API key — full power, no limits
✅ Free Google Gemini key included — start now, pay nothing
✅ No credit card required. No trial expiration. Free forever.

No catch. Bring your own API key (free from Google), run A/B Prompt Tester as long as you want. If you want our key and higher limits, upgrade anytime.

Zero config. Zero lock-in. Your key, your data, your workflow. A/B Prompt Tester is the tool you wish you'd built yourself. Free BYOK tier — start shipping faster today.
Start Free — Bring Your API Key Try with a free Gemini key →
FREE
BYOK
$0/mo
Bring your own API key
Full power, no limits
Starter
$4.99/mo
Bring your own key
150 uses/month
POPULAR
Single App
$14.99/mo
Our key, 1 app
300 uses/month
BEST VALUE
All-Access
$29.99/mo
Our key, all 50 apps
300 uses/app/month

Get a free Gemini API key at Google AI Studio · Cancel anytime · No lock-in