InboxTrue vs MailboxValidator
InboxTrue
inboxtrue.com
MailboxValidator
mailboxvalidator.comSide by side
| Figure | InboxTrue | MailboxValidator |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 3 | 10 |
| Spec score · Email Verification APIs | 7.9 (#10) | 7.9 (#12) |
| Bulk validation | The bulk endpoint accepts up to 200,000 email addresses per order and supports delivery webhooks. | Users can upload an email list in text or CSV format for bulk validation. |
| Headquarters | United States | Penang, Malaysia |
| Integrations | The maker describes integration through a REST API but does not name third-party app integrations on the opened pages. | Listed integrations include Zapier, Make, MailChimp, AWeber, Mailgun, SendGrid, Campaign Monitor, SparkPost, HubSpot, MailerLite, Constant Contact, VerticalResponse, MooSend, Mailjet, iContact, ActiveCampaign, Intercom, Autopilot, ChatGPT, and MCP. |
| Security | The privacy policy says data is encrypted in transit and at rest, access is role-based and audit logged, and API keys are hashed. | Hexasoft says it maintains technical, administrative, and physical measures reasonably designed to help protect personal data from unauthorized processing. |
| Support | Enterprise customers can request dedicated support, and the API documentation says customers can contact InboxTrue about higher rate limits. | The privacy policy lists [email protected] and says to allow up to four weeks for a reply to privacy inquiries. |
| Validation checks | The service checks syntax, DNS/MX, SMTP mailbox existence, disposable addresses, and catch-all domains. | Checks include syntax, MX records, SMTP response, greylisting, disposable addresses, free providers, role addresses, suppression, DMARC, strict SPF, and website reachability. |
Plans
MailboxValidator
- API-FREEFree
- API-FREE+Free
- BULK-TRIALFree
- BULK-1$19.95, paid once
- BULK-5$39.95, paid once
- BULK-10$59.95, paid once
- BULK-50$149.95, paid once
- BULK-100$199.95, paid once
- BULK-500$399.95, paid once
- BULK-1000$699.95, paid once
In their own words
MailboxValidator
MailboxValidator checks email addresses and mailboxes to flag invalid addresses and help reduce email bounces. It is available on the web and through an API, with single-address results returned as JSON or XML. For lists, users can upload text or CSV files for bulk validation. Checks cover syntax, MX records, SMTP responses, greylisting, disposable and free-provider addresses, role addresses, suppression, DMARC, strict SPF, and website reachability. The company says it tests the connection through the SMTP server without sending a message to the recipient. Listed integrations include Zapier, Make, MailChimp, Mailgun, SendGrid, HubSpot, and others; API documentation links libraries for Node.js, Ruby, PHP, Perl, Python, Java,.NET, Go, and Rust. The free API plan is free, billed per month, with 300 queries and 30-day validity. A bulk trial is free for 100 queries and 30-day validity. Yahoo validations are unsupported, and non-ASCII addresses are marked invalid syntax. The FAQ says refunds are not offered; its privacy policy says processed personal data is retained indefinitely, subject to policy limits on deletion requests.