Automated prompt regression testing across every major AI model. Paste your prompts once — PromptGuard tests them every time a new model drops.
Demo mode: simulated results against GPT-4o, o3-mini, and Spud preview
Paste system prompts, add test cases with expected outputs. Takes 5 minutes to set up your full app's prompt suite.
PromptGuard automatically runs your full suite against new models the moment they're available — GPT-5.5, Claude 4, Gemini 3, all of them.
When a prompt degrades — wrong format, lower quality, changed behavior — you get an alert before your users do. Compare side-by-side diffs.
See pass/fail rates across every model. Know exactly which prompts need fixes before you flip the migration switch.
No SDK to install, no codebase to modify. Paste prompts in the dashboard, define expected behavior, run instantly. Works in 5 minutes.
PromptGuard monitors all major AI providers. The moment GPT-5.5 drops, your test suite runs automatically and alerts you to failures.
Compare your prompts' outputs across GPT-4o, o3, Spud, Claude, and Gemini simultaneously. Spot regressions at a glance.
Not just quality — see estimated cost delta when migrating from one model to another. Know if Spud will cost 30% more before you migrate.
Instant notifications when tests fail or degrade. Configure thresholds — alert only when confidence drops below 80%, for example.
Run your test suite daily, weekly, or on demand. Catch prompt drift over time, not just during major model launches.
Test as many prompts as you need. Upgrade only when you grow.
Be the first to know when PromptGuard launches. Early users get Pro free for 30 days.
The Spud launch window is narrow — don't get caught unprepared.
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