Abstract Email Validation API vs InboxTrue
Abstract Email Validation API
abstractapi.comInboxTrue
inboxtrue.comSide by side
| Figure | Abstract Email Validation API | InboxTrue |
|---|---|---|
| Price from | $17/mo | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 5 | 3 |
| Spec score · Email Verification APIs | 7.8 (#13) | 7.9 (#10) |
| Bulk validation | The API supports bulk email validation and CSV upload is included on paid plans listed on the page. | The bulk endpoint accepts up to 200,000 email addresses per order and supports delivery webhooks. |
| Integrations | The maker lists integrations including HubSpot, AWS, Salesforce, Zapier, Snowflake, Shopify, Make, Mailchimp, and Azure. | The maker describes integration through a REST API but does not name third-party app integrations on the opened pages. |
| Support | The product page says questions are usually answered by a real person within a few hours via email or [email protected]. | Enterprise customers can request dedicated support, and the API documentation says customers can contact InboxTrue about higher rate limits. |
| Validation checks | One call checks address format, domain MX records, live SMTP without sending a message, and disposable or catch-all addresses. | The service checks syntax, DNS/MX, SMTP mailbox existence, disposable addresses, and catch-all domains. |
Plans
Abstract Email Validation API
- Starter$17 a month
- Standard$37 a month
- Professional$39 a month
- EnterprisePriced on request
- FreePrice not published
In their own words
Abstract Email Validation API
Abstract Email Validation API checks whether submitted email addresses are correctly formed and can receive mail. One call checks address format, domain MX records, live SMTP without sending a message, and disposable or catch-all addresses. Responses arrive as structured JSON with deliverability, a quality score, SMTP status, and MX validation. The API supports signup form cleanup, B2B lead verification, and efforts to reduce bounce rates without tying a developer to one email provider. The product page says real-time validation responses arrive in under 300ms, and the API also supports bulk checks. CSV upload is included with listed paid plans. The Free plan includes 100 requests at three requests per second. Starter is $17 a month, billed annually, with 60,000 requests per year, three requests per second, domain whitelisting, and bulk CSV upload. The listed integrations include HubSpot, AWS, Salesforce, Zapier, Snowflake, Shopify, Make, Mailchimp, and Azure. The product page lists a 99.99% uptime SLA and describes privacy protections and compliance resources.