STOP FAKE
SIGNUPS.
The adaptive API that scores user quality in 10-40ms. Filter bots, disposable emails, and multi-account fraud before they hit your database.
LIVE INTELLIGENCE
Enter an email to see the trust score and risk factors returned by our API.
4-WAY PARALLEL PIPELINE
Every signup is analyzed by 4 dedicated processors simultaneously. Results in 10-40ms.
Email Intelligence
Catches auto-updating disposable lists, recursive subdomains, DNS MX failures, domain typos (e.g. gmai.com), and role mailboxes (admin@, support@).
Network Analysis
Detects commercial VPNs, datacenter hosting, and Tor exit nodes via hourly sync. Safely verifies Apple iCloud Private Relay to protect legitimate Safari users.
Velocity Checks
3-tier real-time defense stops rapid bursts, multi-account signup farms, rotating proxy botnets, and plus-addressing alias spam loops in milliseconds.
Device Fingerprint
Detects headless automation (Puppeteer, Playwright, Selenium) and scraper clients. Features adaptive scoring that never penalizes server-to-server webhook calls.
Cross-Factor Threat Correlation & Adaptive Scoring
Attackers use clean browser tokens to mask burner emails and proxy farms. SiftlyAPI correlates multi-signal combinations in real time — triggering targeted threat caps for compound attacks (such as disposable emails on cloud datacenters) with weakest-link protection so critical risks are never overlooked.
PRICING
No hidden fees. Cancel anytime. Quotas reset monthly.