CleanSignUps

CleanSignups is a real-time email verification API that stops disposable emails and fake signups from destroying your sender reputation and wasting your marketing budget. With sub-50ms verification speed and a database of 70,000+ disposable domains, it blocks the 20-30% of low-quality signups that inflate bounce rates, drain campaign budgets, and prevent your emails from reaching real subscribers who will actually convert.

TL;DR

CleanSignups delivers 99.9% accurate email verification in under 50 milliseconds, catching disposable addresses and fraudulent signups before they corrupt your list.

With both real-time API protection and bulk list cleaning capabilities, it safeguards your sender reputation while reducing CRM costs and ensuring your campaigns reach engaged subscribers instead of temporary addresses that will never convert.

At-A-Glance

Overview

CleanSignups is a specialized email verification platform designed to solve the costly problem that’s quietly destroying email marketing ROI: low-quality signups that waste resources, damage sender reputation, and skew campaign metrics without ever generating real engagement.

Lightning-Fast Real-Time Protection

CleanSignups verifies emails in under 50 milliseconds, integrating seamlessly into signup forms without creating user friction or noticeable delays that might increase abandonment rates. This lightning-fast response time validates emails as users type, catching disposable addresses and fraudulent patterns before they can submit registration forms and corrupt your database.

The platform maintains a constantly updated database of over 70,000 disposable email domains with automatic daily updates, ensuring protection against new temporary email services the moment they appear. With 99.9% accuracy, CleanSignups confidently blocks fraudulent signups while ensuring legitimate subscribers never face false rejections that could cost you valuable leads.

Bulk Email List Cleaning for Campaign Success

Upload email lists and receive immediate detailed results showing valid emails, invalid addresses, suspicious entries, and temporary disposables that threaten your deliverability. The verification dashboard displays comprehensive quality distributions breaking down your list by domain, showing exactly which providers your subscribers use and highlighting problems before they impact your sender reputation.

Download detailed verification reports with complete control over exported segments, extract only valid emails for your campaign, isolate invalid addresses for removal, or export comprehensive reports containing all results with quality scores and risk assessments. This flexibility ensures you maintain the exact list cleanliness your campaigns require while keeping detailed records of verification activities.

Intelligent Disposable Detection System

CleanSignups specializes in identifying disposable and temporary email addresses that users create specifically to abuse free trials, promotional offers, and gated content without genuine subscription intent. The intelligent detection system catches sophisticated evasion tactics including suspicious variations like “[email protected]” and “[email protected]” that users create to register multiple times with a single actual address.

Dedicated support team members continuously monitor the internet for emerging disposable email providers, adding newly discovered domains to the verification database within hours of their launch. This proactive approach ensures fraudsters can’t exploit gaps in coverage during the window between when new services launch and when they get added to competitor databases.

Multi-Domain Management and Reporting

The platform supports multiple API key generation, allowing you to create separate keys for different domains, applications, or clients. Each key operates independently with its own usage tracking and reporting, making CleanSignups perfect for agencies managing email verification across multiple customer accounts or businesses running several properties that each require validation.

API key-level reporting provides detailed insights into verification patterns for each key, showing request volumes, result distributions, and usage trends over time. This granular reporting ensures you always understand how verification resources are being utilized across different applications and can identify unusual patterns that might indicate integration issues or abuse attempts.

Developer-Friendly API Integration

CleanSignups offers a straightforward JSON REST API with comprehensive documentation and native code samples for Node.js, Python, PHP, Ruby, Go, and JavaScript. The simple API requires just a single request to verify any email address with no complex authentication flows or convoluted setup processes, getting you operational in minutes rather than hours.

Whether integrating into custom applications, CRM systems, or website signup forms, the well-documented API fits seamlessly into your technology stack without requiring architectural changes. The API enforces a generous rate limit of 100 requests per minute per key, providing ample capacity for real-time form validation without requiring complex rate limiting implementation in your application code.

Professional Email Diagnostic Tools

CleanSignups includes a comprehensive suite of free email diagnostic tools that provide valuable functionality beyond core verification. The MX Record Checker validates mail server configuration for any domain, the Email Header Analyzer inspects SPF records, DKIM signatures, and DMARC policies to identify authentication failures, and the Email Deliverability Checker provides comprehensive assessment of whether emails will successfully reach their destination.

These professional utilities help email marketers troubleshoot deliverability issues and diagnose why campaigns might be landing in spam folders. By revealing authentication failures and configuration problems that damage sender reputation, these tools enable proactive fixes before deliverability problems impact campaign performance.

Protect your sender reputation and marketing ROI before this lifetime opportunity disappears!

Get your CleanSignups Lifetime Deal exclusively at Earlybird

Plan & Features

Deal Terms and Conditions

Lifetime access to CleanSignups

All future updates

You must activate your license within 60 days of purchase

30 day money-back guarantee. 

Try it out for 30 days to make sure it’s right for you!

Features Included In All Plans

Real-Time API Verification

Bulk Email List Cleaning

Disposable Email Detection

Suspicious Pattern Recognition

Multiple API Key Management

Quality Score Analysis

Downloadable Verification Reports

Free Email Diagnostic Tools

CleanSignUps FAQ