Truelist

Truelist is an email validation platform that aims to resolve catch-all addresses instead of returning unknown. It runs syntax, DNS and SMTP checks on every email, then applies enhanced catch-all resolution only to the addresses where the standard check cannot give an answer, so you only pay the higher rate where it is needed.

Its pricing is its other selling point. Alongside low pay-as-you-go credits, Truelist offers unlimited standard validation for a fixed monthly price, which suits agencies and lead generation teams that verify millions of emails a month and are tired of buying credit bundles. The platform includes an API, a Chrome extension, an MCP server, recurring validation of saved lists and integrations with Mailchimp, Klaviyo, HubSpot, Zapier and Make. Deliverability monitoring of DNS authentication and blacklists is available as an add-on.

The free plan includes 100 validations. Pay-as-you-go standard validation starts at $1.40 per 1,000 emails, with enhanced catch-all checks at 3 credits each, and credits never expire. Unlimited plans start at $799 a month on a 12-month commitment.