Nullo turns every user into a guardian. The moment anyone spots a scam, the whole network is shielded.
A spammer dials your number. Nullo catches it before your phone even rings — or you report it after.
One tap. Pick a category — IRS scam, Medicare fraud, robocall, telemarketer — and optionally block their texts too.
Nullo instantly pushes the number to every user's blocklist. That spammer never reaches another Nullo member.
More reports = more accuracy. Spam patterns train our detection engine. The bigger the community, the stronger the shield.
Nullo goes beyond a simple blocklist — it's a real-time threat intelligence network in your pocket.
OS-level blocking on both iOS (CallKit) and Android (Telecom API). Spam is silenced before your phone rings — zero interaction required.
Live trending scam alerts — see what fraud campaigns are surging right now, in real time, powered by the Nullo community.
Suspicious call or text? Enter any number to instantly see its community reputation, report history, and risk level before you call back.
Tap to report with one of 8 scam categories. Optionally block texts from the same number. Your report protects every user instantly.
Paste a suspicious SMS or voicemail transcript. Nullo's AI engine evaluates it for scam patterns and tells you exactly what to watch for.
See exactly how many calls Nullo blocked for you today, this week, this year. Real numbers. Real protection you can feel.
Every new member makes Nullo smarter. More reports mean more accuracy. More accuracy means fewer scams reaching anyone.
Reports are verified and propagated across the entire network in seconds — not days.
Nullo works at the phone's operating system level. Spam is stopped cold — before it ever interrupts you.
Every report trains the detection engine. Nullo learns new scam patterns faster than any static blocklist can.
When you report a number, you're not just protecting yourself. You're protecting everyone else in the community.
The first 10,000 members lock in lifetime access for a one-time $4.99 — pay once, protected forever. After that, Nullo is $4.99/month for new users.
Join the Nullo waitlist. Founding members (first 10,000) lock in lifetime access for just $4.99 — one time, forever.
No spam. Ever. (That would be ironic.)