DeBounce

DeBounce is an email verification service that checks addresses in bulk or in real time, flagging bounces, spam traps, disposable addresses, catch-all domains and duplicates before they enter a sending list. It also supports list monitoring, data enrichment, lead finding and programmatic checks through an API.

Core capabilities include syntax elimination, anti-greylisting retries, catch-all domain analysis, spam-trap and honeypot filtering, optional deduplication, and selectable export segments. A real-time validation widget checks addresses as users type on website forms. Lead Finder generates and validates email permutations from a first name, last name and company domain, while reverse email lookup and the API enrich records with contact details. The API supports multiple keys, webhooks, usage monitoring and interactive documentation. Integrations cover ESPs and platforms including HubSpot, Google Sheets, Mailchimp, ActiveCampaign, Mailjet, Mautic, ConvertKit, MailerLite, Klaviyo, Brevo, Gist, WordPress, Zapier and HTML forms.

DeBounce is aimed at marketers, sales teams and developers who need to clean lists, protect sender reputation or validate addresses within their own applications. It is packaged as a pay-as-you-go service with credits that do not expire, and all validation features are available on every plan. A free option lets users test single-address checks without registration or a credit card, and the API includes free verifications for testing.