Built to stop the signups that waste your money
AI and SaaS companies lose thousands of dollars every month to fake signups. Disposable email addresses, temporary inboxes, and bot-generated accounts burn through free-tier resources, pollute analytics, and inflate infrastructure costs.
The existing tools were not built for this problem. Legacy email verification services focus on bulk list cleaning, not real-time signup validation. They are too slow for inline use, too expensive at scale, or too shallow in their checks (just a blocklist and an MX lookup).
BigShield was designed from the ground up for the signup validation use case. One API call runs 30+ detection checks — 15 email validation signals and 15 detection layers — returning a risk score with 99% confidence in under 100 milliseconds. Fast enough for inline validation, accurate enough to catch what blocklists miss, and affordable enough to run on every signup.
What we care about
Speed
Under 100ms response time. Fast enough for inline signup validation without adding latency your users can feel. Tier 1 signals run synchronously, and decisive scores skip slower checks entirely.
Accuracy
30+ detection checks for 99% confidence. Not just a blocklist check. BigShield combines 15 email validation signals and 15 detection layers — from syntax validation to network graph analysis — into a single confidence-weighted risk score.
Simplicity
One API call, one risk score. No complex configuration, no multi-step workflows, no need to combine multiple vendors. Send an email address, get back a score from 0 to 100 with a clear verdict and the signals that contributed to it.
Affordability
Start free, scale as you grow. No annual contracts, no minimums, no surprise overages. Every plan includes a generous monthly quota, and you only upgrade when you need more volume.
Ready to protect your signups?
See how BigShield's multi-signal approach works, or find a plan that fits your volume.