Every plan runs the same detection engine, so accuracy does not depend on what you pay. Paid plans add higher rate limits, IP threat intelligence, and the option to stop contributing attack data.
For side projects and evaluation
Free • 100,000 requests/month
For a live app with real users
Instant access • Cancel anytime
Everything in Free, plus:
For teams running at volume
Scale with confidence
Everything in Starter, plus:
Requests past your plan's monthly limit are rejected with an HTTP 429 response that includes the date your quota resets. Nothing is charged automatically and there is no overage billing, so you cannot get a surprise invoice. Your traffic keeps flowing again at the reset date, or immediately if you upgrade. Decide in advance how your app should behave if validation is unavailable, and see the fail-open and fail-closed guidance in the docs.
SafePrompt prompt injection detection starts at $0/month with a free tier (100,000 validations/month). The Starter plan is $29/month for 500,000 validations. The Business plan is $99/month for 1,000,000 validations. Every plan runs the same detection engine. No per-request fees, no hidden costs, no credit card required for the free tier.
Yes. SafePrompt offers a free tier with 100,000 API validations per month at no cost. The free tier uses the same detection engine as paid plans — pattern detection, external reference detection, and AI validation. No credit card is required. Sign up with your email and get instant access. One difference to know before you choose it: free-tier validations contribute anonymised attack patterns to the shared network defence and cannot opt out. Paid plans can turn that off in Privacy Settings.
SafePrompt's free tier includes 100,000 validations per month, full AI protection (same engine as paid plans), pattern and AI validation, multi-turn attack detection, and network defense contribution. You get GDPR-compliant data export and deletion. The main limitations vs paid plans are no priority support and no intelligence opt-out.
Yes! Sign up and confirm your email for instant access: 100,000 requests/month, no credit card required and no time limits.
Yes! Upgrade anytime, downgrade at the end of any billing cycle. No contracts or penalties.
Yes. Cancel anytime from your dashboard. No cancellation fees, no questions asked.
No credit card needed. Sign up with just your email and start protecting your AI apps immediately.
Every plan uses our full AI validation engine with pattern detection, multi-turn attack protection, and network defense.
Yes! You can upgrade from your dashboard settings anytime. Instant access as soon as payment is confirmed.
No. SafePrompt validates input before it reaches your model, so it works with OpenAI, Anthropic, Google, Mistral, and any other LLM. Switch providers anytime, with no vendor lock-in, and export or delete your data on any plan.
Open-source filters are free to license but you self-host, maintain, and scale them yourself. SafePrompt is fully managed and always-on: one API call, no infrastructure to run, and a free tier so you can start without a credit card.