Security & Privacy·Standings
Compare Multi-Factor Authentication APIs
Multi-factor authentication APIs add a second identity check to an app; compare the verification methods and the platforms you need.
Use the signal score out of 10 as a guide, then check the API, open-source and free-tier marks. The board also compares pricing, passkeys, push verification, one-time codes, SDK languages and webhooks.
- 25 platforms
- 2 with a public API on this page
- 14 with a free tier
- Checked 23 Sept 2026
- 1 SSuperTokenssupertokens.com
An open-source authentication provider with MFA options, passkeys, social login, and session management.
- 2 A
Authgearauthgear.comAuthgear is an identity-as-a-service platform for authentication and user management in web and mobile applications.
- 3 F
FusionAuthfusionauth.ioAn identity server for authentication and user management that supports OAuth, OpenID Connect, and SAML.
- 4 L
LinOTPlinotp.orgAn open-source MFA platform that integrates with SAML, OIDC, ADFS, and RADIUS.
- 5 OA
OpenOTP Authentication Serverrcdevs.comAn MFA server with one-time passwords and FIDO2 for securing network access.
- 6 SVSinch Verification APIsinch.com
A verification API that checks users by SMS, voice call, flash call, or mobile data.
- 7 MMminiOrange Multi-Factor Authenticationminiorange.com
The MFA solution requires users to verify identity with two or more factors before accessing an account or system.
- 8 P
privacyIDEAprivacyidea.orgprivacyIDEA is a modular authentication server for adding two-factor authentication to applications, VPNs, remote access, SSH, websites, and web portals.
- 9 D
Descopedescope.comAn identity platform with MFA, passkeys, and a visual builder for login screens and flows.
- 10 SStytchstytch.com
An identity platform with MFA, passkeys, SSO, and tools for managing organizations and roles.
- 11 M
MojoAuthmojoauth.comA sign-in service offering passkeys, magic links, one-time codes, and social login.
- 12 PV
Plivo Verifyplivo.comA verification API that sends and checks one-time passwords by SMS or voice, with WhatsApp pricing listed.
- 13 BV
Bird Verifybird.comA contact check that confirms a recipient received and entered a verification code.
- 14 A
Authsignalauthsignal.comAuthsignal is an MFA and passkeys-as-a-service platform that adds risk-based MFA and passkeys to an existing identity stack.
- 15 L
LoginRadiusloginradius.comLoginRadius describes its platform as a fully managed Customer Identity and Access Management (CIAM) service for authentication, authorization, and identity…
- 16 TSTraitWare SDKtraitware.com
- 17 TVTwilio Verifytwilio.com
Verify is a managed API for user verification and authentication flows, including one-time passcodes, two-factor authentication, account recovery, and step-up…
- 18 YYubiCloudyubico.com
- 19 YSYubico SDKsyubico.com
- 20 TVTelesign Verifytelesign.com
A verification service with SMS, email, and push options, plus webhooks and mobile SDKs.
- 21 TVTelnyx Verifytelnyx.com
- 22 VVVonage Verifyvonage.com
- 23 I2Infobip 2FAinfobip.com
- 24 DADuo Auth APIduo.com
An authentication API with push and SMS verification, plus SDKs for seven programming languages.
- 25 RRRublon REST APIrublon.com
A REST API for multi-factor authentication; pricing is available on request.
Places #1, #2, #3, #4, #5 on this board are open to sponsors. Take #1 · Other ways to advertise
How to choose
Which platforms does it need to run on?
Choose a service that supports the places your app runs. Platform labels include web, API, Android, iOS, self-hosted and Linux.
Check the individual listing for the platforms you need; support for one does not establish support for another.
Which verification methods should I compare?
Match the supported methods to the checks your app needs, such as passkeys, push verification, time-based one-time passwords (TOTP), SMS codes or email codes.
Compare method support in the listing rather than assuming a service offers a particular option.
How should I compare free plans and pricing?
Check whether a free plan is available, what the paid starting price is, and whether a trial is offered. A free plan and a free trial are different terms.
For example, Authgear lists a free plan and paid pricing from $50 per month. Authsignal lists pricing from $499 per month and a 30-day trial, with no free plan.
What should I check before connecting it to my app?
Review SDK language support and webhook support against your app's needs. A webhook is a way for a service to send an app an update when an event happens.
If you need to inspect or change the software's code, check its open-source mark and the terms that apply.
Questions
What is a multi-factor authentication API?
It is a way for an app to add another identity check, such as a passkey, push approval, or one-time code.
How do I compare multi-factor authentication APIs?
Compare supported platforms and verification methods, then check SDK languages, webhooks, pricing and the free-tier and open-source marks.
What does TOTP mean in multi-factor authentication?
TOTP means time-based one-time password: a short-lived code that changes over time.
Is a free trial the same as a free plan?
No. A free plan is a continuing plan; a trial gives access for a limited period. Check the pricing details for the terms.
What is webhook support for an authentication API?
A webhook lets the service send your app an update when an event happens. Check the listing to see whether it is supported.
Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure