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Sinch Verification API
Stockholm, Sweden
What it is
Sinch Verification API provides multi-factor authentication and phone number verification for app sign-up, login, and password resets. Developers can use it for one-time passwords, password-free phone verification, and other account checks through backend REST APIs or native Android and iOS SDKs. Verification methods include SMS, voice calls, flash calls, and data verification. Sinch describes multilingual support across devices and platforms, with fallback options for delivery, conversion, and price, backed by more than 600 direct tier-1 operator connections. Its Dashboard displays verification results and delivery and conversion metrics in real time. Named identity and access management integrations include Okta and Auth0; developer guides also cover ForgeRock and SAP. For SDK requests from untrusted mobile devices, Sinch recommends Public Authentication and says callbacks should validate requests to help prevent fraud. Data Verification requires mobile data to be enabled, and Sinch advises contacting an account manager to use it. The service offers free trial credit through Sinch Build and a free account for sending a verification request. Verification is billed per request; SMS pricing varies by country and operator, while flash calls have a fixed price per attempt. The current pricing list is available in the Sinch Build dashboard.
For and against
For
- Offers SMS, voice, flash calls, and data verification.
- Provides REST APIs and Android and iOS SDKs.
- Displays delivery and conversion metrics in real time.
- Free trial credit is available through Sinch Build.
Against
- Data Verification requires mobile data to be enabled.
- Data Verification use requires contacting an account manager.
The verdict
Sinch Verification API supports several verification methods and developer access paths, with per-request pricing. Check the dashboard for current pricing and confirm account and callback requirements for your integration.
Who it suits
It suits developers adding phone verification or multi-factor authentication to app account flows. Data Verification is described for banking, e-commerce, and social apps, and requires mobile data to be enabled.
Plans and prices
Pay-as-you-go verification
Current pricing list available in the Sinch Build dashboard
Read 7 Oct 2026 · developers.sinch.com
On the record
- Additional integrations
- The developer documentation lists integration guides for Auth0, ForgeRock, Okta, and SAP.developers.sinch.com · read 7 Oct 2026
- Authentication use cases
- Sinch describes the API as supporting multi-factor authentication and password-free phone number verification.sinch.com · read 7 Oct 2026
- Company history
- Sinch says its founders set out to transform customer communications in 2008.sinch.com · read 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.developers.sinch.com · read 7 Oct 2026
- Developer access
- The Verification SDK is available for iOS and Android, and backend services are exposed through REST APIs.developers.sinch.com · read 7 Oct 2026
- Free access
- Sinch's SMS Verification page instructs users to sign up for a free account to send a verification request.sinch.com · read 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.sinch.com · read 7 Oct 2026
- Integration
- Sinch lists Okta and Auth0 as customer identity and access management integrations.sinch.com · read 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.developers.sinch.com · read 7 Oct 2026
- Integrations
- The product page names Okta and Auth0 as customer identity and access management integrations.sinch.com · read 7 Oct 2026
- Intended uses
- Sinch describes Data Verification use cases including banking, e-commerce, and social apps.sinch.com · read 7 Oct 2026
- Mobile SDKs
- Sinch provides native SDKs for building verification into Android and iOS apps.developers.sinch.com · read 7 Oct 2026
- Network
- Sinch says its global network has more than 600 direct tier-1 operator connections.sinch.com · read 7 Oct 2026
- Pricing
- The pricing page describes pay-as-you-go SMS pricing but does not state a Verification API price.sinch.com · read 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.developers.sinch.com · read 7 Oct 2026
- Purpose
- The API provides scalable multi-factor authentication for app security and user verification.sinch.com · read 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.developers.sinch.com · read 7 Oct 2026
- Security
- Sinch says it is GDPR compliant, MEF Code of Conduct approved, and ISO 27001 certified.sinch.com · read 7 Oct 2026
