Skip to content
SPECIFICTION
Get listed

InboxTrue

inboxtrue.com

Free plan WebAPI
Visit inboxtrue.com
Spec score 7.9 #10 of 31 in Email Verification APIs

Spec sheet

Product
InboxTrue is an email validation API for checking whether addresses are real before sending email.Read 5 Oct 2026 · inboxtrue.com
Intended users
The privacy policy says the service is intended for businesses and developers and is not directed to children.Read 5 Oct 2026 · inboxtrue.com
Integrations
The maker describes integration through a REST API but does not name third-party app integrations on the opened pages.Read 5 Oct 2026 · inboxtrue.com
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.Read 5 Oct 2026 · inboxtrue.com
Compliance
For EU, UK, or Swiss personal data transfers, the policy says InboxTrue relies on safeguards such as Standard Contractual Clauses or other lawful transfer mechanisms.Read 5 Oct 2026 · inboxtrue.com
Support
Enterprise customers can request dedicated support, and the API documentation says customers can contact InboxTrue about higher rate limits.Read 5 Oct 2026 · inboxtrue.com
Headquarters
United StatesRead 28 Sep 2026 · inboxtrue.com
API integration
The API uses plain HTTP and requires no SDK, with examples for curl, Node.js, Python, and Go.Read 5 Oct 2026 · inboxtrue.com
API limits
Single-email validation accepts a timeout from 1 to 90 seconds, with a default of 60 seconds.Read 5 Oct 2026 · inboxtrue.com
Bulk validation
The bulk endpoint accepts up to 200,000 email addresses per order and supports delivery webhooks.Read 5 Oct 2026 · inboxtrue.com
Data handling
Submitted email addresses and results may be cached, stored in validation history, and used to improve service accuracy; the policy says they are not sold.Read 5 Oct 2026 · inboxtrue.com
SMTP behavior
The SMTP check uses a real handshake and says it does not send email.Read 5 Oct 2026 · inboxtrue.com
Validation checks
The service checks syntax, DNS/MX, SMTP mailbox existence, disposable addresses, and catch-all domains.Read 5 Oct 2026 · inboxtrue.com

Plans and prices

Free tier Free 1,000 validations/month · 1 request/second · no credit card Read 5 Oct 2026 · inboxtrue.com
One-time $50, paid once One-time cost ≈ $0.0050 / validation · credits never expire Read 5 Oct 2026 · inboxtrue.com
Enterprise Priced on request Available on request Custom volume and rate limits · dedicated support · invoicing and DPA Read 5 Oct 2026 · inboxtrue.com

Every InboxTrue plan and price →

Where Specifiction places it

Alternatives to InboxTrueAll alternatives →