About us
StopReg helps engineering teams reduce fraud, preserve clean user databases, and improve conversion quality from day one.
StopReg is a disposable email detection and domain intelligence platform built for developers who care about data quality, security, and scalable growth.
Modern applications face constant abuse from temporary inboxes, email masking services, and throwaway domains. These lead to fake accounts, trial abuse, distorted metrics, and unnecessary infrastructure costs.
StopReg solves this at the edge of your signup flow.
Our API validates email domains in real time, identifying disposable providers, masked addresses, and low-trust domains before accounts are created. We maintain a continuously updated domain intelligence engine backed by automated discovery, manual verification, and behavioral analysis to ensure high accuracy with minimal false positives.
Our Mission
Our mission is to give developers a reliable, frictionless way to stop disposable email abuse at signup — helping teams build trusted platforms, protect their infrastructure, and grow with real users.
We aim to make email validation simple, fast, and precise, so engineering teams can focus on building products instead of fighting spam and fake accounts.
StopReg is Built for Production
Whether you're protecting a SaaS product, API service, or internal system, StopReg gives you a reliable signal at signup — helping you block disposable emails while allowing legitimate users through.
DOMAIN
Real-time domain classification
REST API
REST API with sub-second response times
JSON
JSON responses optimized for automation
WEB DASHBOARD
Web dashboard for manual checks and monitoring
What We Believe In
Clean data first
Your product decisions are only as good as your data.
Security without friction
Blocking abuse shouldn't punish legitimate users.
Developer simplicity
Integration should be straightforward, predictable, and well-documented.
Accuracy over volume
We prioritize precision and low false positives over massive unchecked domain lists.
Continuous improvement
Disposable email providers evolve fast, and so do we.
User trust above all
Every decision we make should strengthen confidence and long-term reliability.
What We Focus On
Our goal is straightforward: provide developers with a fast, accurate way to prevent disposable email abuse — without breaking onboarding flows.
High-precision disposable domain detection
Continuous domain intelligence updates
Low-latency validation
Developer-friendly implementation
Infrastructure built to scale
Frequently Asked Questions
Your questions around disposable email, answered.
A disposable email blocker is a tool that automatically detects and blocks temporary, fake, or throwaway email addresses from signing up on your website. This helps you maintain a clean user database, reduce spam, and protect your platform from abuse.
Disposable emails are commonly used for fraud, spam, duplicate account creation, free-trial abuse, and bot signups. Blocking them helps you:
- Improve lead quality
- Reduce fraud and abuse
- Protect your free trials
- Increase conversion accuracy
- Improve email deliverability
Yes. The API validates emails instantly (typically within milliseconds), allowing you to block disposable emails during signup, checkout, or form submission.
Yes. You can whitelist domains you trust to ensure legitimate users are never blocked by mistake.
No. We do not store full email addresses. For privacy and compliance, we only check the domain part and discard all data immediately.
No. Only temporary and fake domains. Corporate, ISP, and custom domain emails are always allowed unless they appear in known disposable lists.
Yes. We offer flexible plans, including:
- Monthly subscription
- Unlimited requests for enterprise users
Yes. Feel free to test the free trial and see how many fake signups you prevent within minutes.
Yes. By blocking temporary and fake emails:
- Your bounce rate drops
- Your sender reputation improves
- You stay compliant with email service providers
This helps your real messages reach real inboxes.