# AntiTrial
> AntiTrial is real-time trial and signup abuse protection for SaaS. Score every signup in under 50ms with ALLOW, BLOCK, CHALLENGE, or LIMIT decisions — before free-trial fraud costs you infrastructure, support, and revenue.

AntiTrial helps B2B SaaS teams stop multi-accounting, disposable-email signups, trial farming, and signup velocity attacks at the point of registration. Integrate via REST API, Node SDK, React SDK, or Web SDK with a backend-for-frontend (BFF) pattern.

Key facts:
- Product: signup risk scoring and trial abuse prevention
- API base: https://api.antitrial.com/v1
- Dashboard: https://app.antitrial.com
- Documentation: https://docs.antitrial.com
- Pricing: usage-based per evaluation (free tier available)
- Sitemap: https://antitrial.com/sitemap.xml

## Site
- [Home](https://antitrial.com/): Product overview, features, and integration preview
- [Pricing](https://antitrial.com/pricing/): Self-serve plans priced per evaluation
- [Savings calculator](https://antitrial.com/calculator/): Estimate cost of trial abuse for your SaaS
- [Try it](https://antitrial.com/try/): Interactive demo of signup risk decisions
- [Blog](https://antitrial.com/blog/): Guides on free trial abuse, SaaS fraud, and prevention
- [Sign up](https://app.antitrial.com/sign-up): Create a free AntiTrial account
- [Sign in](https://app.antitrial.com/sign-in): AntiTrial dashboard

## Developers
- [Documentation](https://docs.antitrial.com): Full developer docs — quickstart, architecture, API reference, SDKs
- [Five-minute React quickstart](https://docs.antitrial.com/docs/quickstart/five-minute-react): Minimal React signup with AntiTrial
- [API reference](https://docs.antitrial.com/docs/api-reference): REST API — evaluate, decisions, rules, webhooks
- [Node SDK](https://docs.antitrial.com/docs/sdks/node): Server-side evaluate and identity checks
- [React SDK](https://docs.antitrial.com/docs/sdks/react): Provider, hooks, and challenge components
- [Web SDK](https://docs.antitrial.com/docs/sdks/web): Browser device signals and passkey helpers

## Blog
- [What is free trial abuse and how much does it cost SaaS?](https://antitrial.com/blog/what-is-free-trial-abuse/): Definition, attack patterns, and cost model for SaaS trial fraud
- [How to prevent free trial abuse when launching your SaaS](https://antitrial.com/blog/how-to-prevent-free-trial-abuse-launching-saas/): Launch checklist for scoring signups, layering signals, and enforcing ALLOW/BLOCK/CHALLENGE/LIMIT before provisioning
- [Disposable email detection for SaaS signups](https://antitrial.com/blog/disposable-email-detection-saas-signups/): What disposable emails are, how detection works, what to block vs challenge, and why email alone is not enough
- [SaaS signup fraud: 5 signals to score before granting a trial](https://antitrial.com/blog/saas-signup-fraud-signals-score-trial/): Signup risk scoring guide — email reputation, device fingerprint, IP velocity, OAuth metadata, behavioral signals
- [Building a B2B SaaS? Add trial abuse protection before you launch](https://antitrial.com/blog/b2b-saas-trial-abuse-protection-before-launch/): Why to integrate trial abuse APIs at build time, BFF architecture, build-vs-buy comparison, pre-launch checklist

## Optional
- [Extended site context](https://antitrial.com/llms-full.txt): Marketing, pricing, and product summary for LLMs
- [Full documentation index](https://docs.antitrial.com/llms.txt): Complete docs link index for LLM context
- [Extended documentation context](https://docs.antitrial.com/llms-full.txt): Full markdown export of all documentation pages
- [Privacy policy](https://antitrial.com/privacy/): How AntiTrial handles personal data
- [Terms of service](https://antitrial.com/terms/): Terms for the website, API, and SDKs
- [Status](https://status.antitrial.com): Service uptime and incidents
- [Changelog](https://docs.antitrial.com/docs/changelog): Platform and docs release notes