SignUp Guard

Disposable detection

Catch burner emails before they pollute your product

Combine curated disposable-domain lists with AI risk scoring to stop temporary inboxes, abuse patterns, and throwaway signups in real time.

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SignUp Guard — Recent analyses
EmailTypeScoreVerdict
alex@acme.ioBusiness92Allow
jane@gmail.comPersonal58Review
test@mailinator.comPersonal6Block

Why it matters

From problem to solution

The problem

Disposable emails inflate your user count, skew activation metrics, and never convert. Static blocklists alone miss new burner services within hours.

How SignUp Guard helps

SignUp Guard matches against known disposable providers and layers AI scoring for patterns static lists miss — aliases, role accounts, and suspicious local parts.

Key capabilities

See it in action

Every check runs through the same pipeline — here's what that looks like for disposable detection.

@tmp-inbox.net
@0sec.email
qx1@mailinator.comDisposable
6score
Block

allow ≥ 66 · review 31–65 · block ≤ 30

  • List + AI combined

    Curated disposable lists catch known providers; AI scoring catches variants and emerging patterns.

  • 0–100 quality score

    Every check returns a numeric score where higher means a more trustworthy signup, plus allow, review, or block recommendations your code can act on.

  • Sub-second responses

    Built for the signup hot path — validate before you provision accounts or send welcome emails.

Use cases

Built for real workflows

  • Block temp-mail signups

    01

    Block temp-mail signups on registration

    qx1@tmpmail.ioScore 6Blocked

  • Flag risky emails

    02

    Flag risky emails for manual review

    user+99@proton.meScore 42Review queue

  • Protect free tiers

    03

    Protect free tiers from abuse farmers

    bot@0sec.emailDisposableSignup denied

Ready to protect your signups?

Start free with 500 checks per month. No credit card required.

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