Sinch Verification API
Sinch Verification API provides phone number verification and multi-factor authentication for app sign-up, login, and password resets.
What Sinch Verification API is
Sinch Verification API provides phone number verification and multi-factor authentication for app sign-up, login, and password resets. Developers can use one-time passwords, password-free verification, and other account checks through REST APIs or native Android and iOS SDKs. Methods include SMS, voice calls, flash calls, and data verification. Data Verification requires mobile data to be enabled, and Sinch advises contacting an account manager to use it. The service supports Android, iOS, web, and API use, with multilingual delivery and fallback options. Sinch says its network has more than 600 direct tier-1 operator connections. The Dashboard displays verification results and delivery and conversion metrics in real time. Named identity integrations include Okta and Auth0, while developer guides also cover ForgeRock and SAP. Sinch offers free trial credit through Sinch Build and describes pay-as-you-go verification billed per request; SMS charges vary by country and operator, and flash calls have a fixed price per attempt. No Verification API price is stated.
Good
- SMS, voice, flash call, and data verification methods
- REST APIs and native Android and iOS SDKs
- Dashboard shows results and delivery metrics in real time
- Integrations include Okta and Auth0
- Free trial credit available through Sinch Build
Watch out
- No Verification API price is stated
- Data Verification requires mobile data and account-manager contact
- SMS charges vary by country and operator
Who it suits
The API suits developers adding phone verification or multi-factor authentication to account flows. Its REST APIs and Android and iOS SDKs support backend and mobile app integration.
Verdict
Sinch Verification API offers several verification methods and integration routes for app account flows. Review the usage-based pricing details and Data Verification requirements before adopting it.
Plans and prices
From Sinch Verification API's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Pay-as-you-go verification | Priced on request | Current pricing list available in the Sinch Build dashboard · Per request; SMS pricing varies by country and operator, and flash calls have a fixed price per attempt. |
The facts
Each one read from Sinch Verification API's own pages, with the date it was checked.
What it does
- Additional integrations
- The developer documentation lists integration guides for Auth0, ForgeRock, Okta, and SAP.checked 7 Oct 2026
- Authentication use cases
- Sinch describes the API as supporting multi-factor authentication and password-free phone number verification.checked 7 Oct 2026
- Data Verification availability
- Sinch says Data Verification requires mobile data to be enabled and advises contacting an account manager to use it.checked 7 Oct 2026
- Developer access
- The Verification SDK is available for iOS and Android, and backend services are exposed through REST APIs.checked 7 Oct 2026
- Global reach
- The service supports verification on any device or platform, in multiple languages, with fallback options for delivery, conversion, and price.checked 7 Oct 2026
- Integration
- Sinch lists Okta and Auth0 as customer identity and access management integrations.checked 7 Oct 2026
- Integration requirement
- The Auth0 integration guide requires a Sinch account with enough credits and the user's phone number in metadata under phone_number.checked 7 Oct 2026
- Integrations
- The product page names Okta and Auth0 as customer identity and access management integrations.checked 7 Oct 2026
- Intended uses
- Sinch describes Data Verification use cases including banking, e-commerce, and social apps.checked 7 Oct 2026
- Mobile SDKs
- Sinch provides native SDKs for building verification into Android and iOS apps.checked 7 Oct 2026
- Network
- Sinch says its global network has more than 600 direct tier-1 operator connections.checked 7 Oct 2026
- Pricing
- The pricing page describes pay-as-you-go SMS pricing but does not state a Verification API price.checked 7 Oct 2026
- Pricing model
- Verification is priced per request; SMS price depends on country and operator, and flash calls have a fixed price per attempt.checked 7 Oct 2026
- Purpose
- The API provides scalable multi-factor authentication for app security and user verification.checked 7 Oct 2026
- Request protection
- For SDK requests from untrusted mobile devices, Sinch recommends Public Authentication and requires verification callbacks to validate requests and help prevent fraud.checked 7 Oct 2026
- Security
- Sinch says it is GDPR compliant, MEF Code of Conduct approved, and ISO 27001 certified.checked 7 Oct 2026
- Support
- The product page provides regional phone support hours for the Americas, EMEA, Singapore, and Melbourne.checked 7 Oct 2026
- Trust documentation
- Sinch's Trust Center lists ISO 27001:2022, SOC 2 Type II, PCI, GDPR, and HIPAA badges and says certifications may apply to specific products.checked 7 Oct 2026
- Usage insights
- The Sinch Dashboard displays verification results and delivery and conversion metrics in real time.checked 7 Oct 2026
The company
- Company history
- Sinch says its founders set out to transform customer communications in 2008.checked 7 Oct 2026
- Founded
- 2008checked 28 Sep 2026
- Headquarters
- Stockholm, Swedenchecked 28 Sep 2026
Money
- Free access
- Sinch's SMS Verification page instructs users to sign up for a free account to send a verification request.checked 7 Oct 2026
- Trial
- Sinch Build offers free trial credit for testing Verification, including OTP, silent authentication, and number lookup.checked 7 Oct 2026
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