Lero - Email Validator

Product Introduction

1. Lero - Email Validator is an enterprise-grade email validation tool designed to verify email addresses in real time with high precision and speed. It enables users to check the validity of email addresses programmatically via an API or through manual CSV uploads, ensuring accurate deliverability for marketing and communication campaigns. The platform operates with a 97.3% accuracy rate audited for Q2 2025 and complies with GDPR and ISO 27001 standards for data security.
2. The core value of Lero lies in its cost-effective, scalable solution for reducing email bounce rates and optimizing outreach efforts. By offering pay-as-you-go pricing starting at $0.0003 per email and a free tier of 500 initial checks, it eliminates upfront costs and overpayment for invalid email verifications. Its enterprise-grade infrastructure ensures rapid validation in 50 milliseconds, making it ideal for startups and founders prioritizing budget efficiency and operational reliability.

Main Features

1. Lero provides real-time email validation with a 97.3% accuracy rate, verified through independent audits in Q2 2025, ensuring reliable results for critical campaigns. The validation process checks syntax, domain validity, and mailbox existence while filtering disposable or role-based addresses.
2. The platform supports bulk email validation via CSV file uploads or direct API integration, enabling seamless integration into existing workflows. Users can process large email lists without manual entry, with results delivered in structured formats for easy analysis.
3. Lero operates on ISO 27001-certified hosting infrastructure, guaranteeing data security and GDPR compliance for handling sensitive user information. Enterprise users benefit from audit-ready documentation and encryption protocols for all data transfers.

Problems Solved

1. Lero addresses the problem of high email bounce rates caused by invalid or inactive addresses, which damage sender reputations and increase campaign costs. By filtering invalid emails before deployment, it improves deliverability rates and reduces wasted resources.
2. The tool targets founders, startups, and growth teams requiring scalable email validation without enterprise-level pricing. It is particularly suited for businesses running cold email campaigns, CRM hygiene maintenance, or newsletter subscriptions.
3. Typical use cases include validating user sign-up lists to reduce churn, cleaning CRM databases before outreach campaigns, and ensuring compliance with data protection regulations during bulk email processing.

Unique Advantages

1. Unlike competitors, Lero combines enterprise-level security certifications (GDPR, ISO 27001) with founder-friendly pricing, offering a rare balance of affordability and compliance. Competitors often charge higher rates for similar audit-ready features.
2. The platform’s 50-millisecond validation speed is 30% faster than industry averages, enabling real-time integration into sign-up forms or checkout processes without latency. This is achieved through optimized API endpoints and distributed server networks.
3. Lero’s pay-as-you-go model with no monthly commitments allows users to scale usage precisely with campaign needs, avoiding overprovisioning. The inclusion of 500 free credits and volume discounts above 100,000 emails provides unmatched flexibility for startups.

Frequently Asked Questions (FAQ)

1. How does Lero’s pricing compare to other email validation services? Lero charges $9 for 10,000 emails ($0.0003 per email) with no hidden fees, making it 40-60% cheaper than competitors offering similar accuracy and compliance features. Volume discounts apply for batches exceeding 100,000 emails.
2. What is included in the free tier? Users receive 500 free email validations upon sign-up, which can be used for testing or small-scale campaigns. No credit card is required, and unused credits do not expire.
3. How do I validate emails using Lero? Emails can be checked individually via the web interface, pasted in bulk, or uploaded as CSV files. For automated workflows, integrate the REST API into your application using provided API keys and documentation.
4. Is Lero compliant with EU data regulations? Yes, Lero is fully GDPR-compliant and processes all data on ISO 27001-certified servers located in the EU. User data is encrypted in transit and at rest, with audit logs available upon request.
5. How is the 97.3% accuracy rate verified? Independent third-party audits in Q2 2025 confirmed the accuracy through cross-testing with 10 million email addresses. Lero’s algorithms update hourly to adapt to new domain rules and mailbox provider changes.