18.5
Authgear is an identity-as-a-service platform for authentication and user management in web and mobile applications.
Free planOpen sourceAndroidiOSWeb
Best Multi-Factor Authentication APIs in 2026
Multi-factor authentication APIs help apps add sign-in checks such as passkeys, push verification, TOTP, SMS OTP and email OTP. Compare the API features, SDK languages and webhook support that fit your sign-in flow. Services in this category run across web, API, Android, iOS, self-hosted and Linux environments. If Android access matters, check the service's Android support and how its API connects to your app.…
28.5
SuperTokens is an open-source authentication provider for developers adding customizable sign-in and session management to applications.
Free planOpen sourceAndroidiOSWeb
38.3
FusionAuth is a Customer Identity and Access Management server for authentication, authorization, and user management.
Free planAndroidiOSWeb
- 4
Descope
Descope is a customer and agentic identity platform for authentication, user management, authorization, and identity journeys.
Free planAndroidiOSWebAPI7.6From $249 a month - 5
MojoAuth
MojoAuth provides passwordless authentication for consumer apps through one API for customer sign-in across web and mobile.
Free planAndroidiOSWebAPI7.3From $120 a month - 6
miniOrange Multi-Factor Authentication
miniOrange Multi-Factor Authentication requires users to verify their identity with two or more factors before accessing an account or system.
Free planWebLinuxmacOSSelf-hosted7.2From $2 a month - 7
OpenOTP Authentication Server
OpenOTP Authentication Server is a multi-factor authentication server for securing network access with OTP and FIDO2.
Free planAndroidiOSWebAPI7.0Free plan - 8
Stytch
Stytch is an identity platform for applications used by people and AI agents, bringing authentication, authorization, and security tools together.
Free planAndroidiOSWebAPI7.0Free plan - 9
Authsignal
AndroidiOSWebAPI6.9From $499 a month - 10
LinOTP
LinOTP is an open-source platform for multi-factor authentication, built to protect digital identities and transactions.
Free planAndroidiOSWebAPI6.9Free plan - 11
Sinch Verification API
Sinch Verification API provides phone number verification and multi-factor authentication for app sign-up, login, and password resets.
AndroidiOSWebAPI6.9 - 12
privacyIDEA
privacyIDEA is an open-source, modular authentication server for adding two-factor authentication to applications, VPNs, remote access, SSH, websites, and web portals.
AndroidiOSWebAPI6.7From €165 a month - 13
LoginRadius
LoginRadius is a fully managed Customer Identity and Access Management service for authentication, authorization, and identity administration.
AndroidiOSWebAPI6.6 - 14
TraitWare SDK
AndroidiOSWebAPI6.3 - 15
Twilio Verify
WebAPI6.3 - 16
Bird Verify
Bird Verify confirms control of a phone number or email address by sending a code and checking the response.
Free planWebAPI6.2Free plan - 17
Plivo Verify
Plivo Verify is an API for sending and validating one-time passwords used in two-factor authentication.
Free planWebAPI6.2Free plan - 18
Telesign Verify
AndroidiOSWeb5.5 - 19
Yubico SDKs
AndroidiOSLinuxmacOS5.4 - 205.1
- 21
Infobip 2FA
Web4.8 - 224.8
- 23
YubiCloud
Web4.7 - 244.3
- 254.3
Choosing well
Match the sign-in methods
Compare passkey, push verification, TOTP, SMS OTP and email OTP support against the factors your app needs.
A service may focus on one delivery method or support several, so check its feature details before planning the integration.
Check platforms and SDKs
The listed platforms include web, API, Android, iOS, self-hosted and Linux. Confirm that the service supports the environment where your app and authentication logic run.
Review the SDK languages, Android availability and webhook support so events can reach your existing systems.
Read the pricing terms
Free plans appear across the category, while paid pricing ranges from listed starting rates to pricing on request. Authgear lists a free plan with paid service from $50 per month; miniOrange lists plans from $2 per user per month.
Trials vary by service. Authsignal lists a 30-day trial, Infobip 2FA a 60-day trial, and LoginRadius a 14-day trial. Check whether a trial or free plan covers the features you need.
Decide where it runs
Self-hosted and Linux options can suit teams that want to operate the authentication service themselves. LinOTP is listed as open source.
Hosted services may fit teams that prefer an external API. Check deployment requirements, documentation and webhook handling before committing.
Questions people ask
Do these MFA APIs support Android?
Android is one of the platforms represented in this category. Check the individual service for Android support, SDK details and integration requirements.
Which authentication methods can I compare?
The comparison covers passkeys, push verification, TOTP, SMS OTP and email OTP, along with SDK languages and webhook support.
Are free plans available?
Free plans are offered by services in this category. Terms differ, so review the listed plan limits and paid starting price.
Can I run an MFA API myself?
Self-hosted and Linux platforms are represented. LinOTP is listed as open source; verify deployment and maintenance requirements for your setup.
Do these services offer trials?
Trial periods vary. Listed examples include 14-day, 30-day and 60-day trials, while other services show no trial or pricing on request.