Mailbeam review
A batch-capable verification API with broad checks, but a higher entry price and API-only access.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Mailbeam is a REST API for checking email addresses before they enter applications, signup flows, or marketing databases. It is aimed at API teams that need both single-address, real-time verification and large-scale list cleaning. Checks cover syntax, MX records, SMTP mailbox existence, disposable domains, role-based addresses, free providers, and catch-all domains. Results include a 0–100 quality score and machine-readable reason codes, while bearer-token authentication and API-key rotation support operational control.
The published plans scale from a Free tier with 1,000 verifications per month to Starter at €19 per month for 10,000, Growth at €49 for 50,000, Pro at €149 for 200,000, and Scale at €499 for 1,000,000. Free includes REST API access, CSV uploads, batch API access, core checks, and webhooks. Starter adds SMTP probing, typo suggestions, and email support. Growth adds an asynchronous batch endpoint and priority email support; Pro adds a 12-hour support response time and dedicated IP pool; Scale adds a four-hour response time and a dedicated IP pool option. Enterprise supports 10M+ verifications per month with on-premise deployment, custom IP allocation, a dedicated account manager, and a custom SLA.
Its strongest fit is asynchronous processing: jobs can handle up to 500,000 addresses, with webhook events for completion. Bulk CSV upload, batch APIs, and integrations with HubSpot, Salesforce, Typeform, Zapier, and Make extend its workflow reach, while EU-hosted infrastructure and GDPR-focused data handling suit teams with European data considerations. The tradeoff is a narrower delivery model: Mailbeam is API-only, and its €19 starting price may not suit teams seeking lower-cost credit-based verification. Choose it for programmable, high-volume verification; consider an alternative if you need a primarily visual workflow or more flexible credit economics.
Mailbeam pros and cons
- Where it wins
- Processes asynchronous batches of up to 500,000 addresses per job
- Combines syntax, MX, SMTP, disposable, role, and catch-all checks
- Provides 0–100 quality scores, reason codes, and webhook events
- Where it doesn't
- €19 monthly entry price is higher than many credit-based competitors
- API-only coverage limits access to API-based workflows
- Credit rollover is not included
Mailbeam fact sheet, pricing and score →
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