Top 12 Open-Source Alternatives to OpenID

The top open-source alternatives to OpenID are Portier, IdentityServer, and Auth0. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Portier Landing Page
1

Portier

An email-based, passwordless authentication service that you can host yourself.
Pricing:
- Open Source
#Identity And Access Management #Network & Admin #Identity Provider 2 social mentions
IdentityServer Landing Page
2

IdentityServer

An open-source, standards-compliant, and flexible OpenID Connect and OAuth 2.x framework for ASP.NET Core
Pricing:
- Open Source
#Identity Provider #Identity And Access Management #SSO 7 social mentions
Auth0 Landing Page
3

Auth0

Auth0 is a program for people to get authentication and authorization services for their own business use.
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO 175 social mentions
Keycloak Landing Page
4

Keycloak

Open Source Identity and Access Management for modern Applications and Services.
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO 4 social mentions
KeePass Landing Page
5

KeePass

KeePass is an open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password or key file.
Pricing:
- Open Source
#Security & Privacy #Password Management #Password Managers 206 social mentions
Lastpass Landing Page
6

Lastpass

LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Pricing:
- Open Source
#Password Management #Password Managers #Security & Privacy 22 social mentions
OAuth2 Landing Page
7

OA

OAuth2

Application and Data, Application Utilities, and User Management and Authentication
Pricing:
- Open Source
#Identity Provider #Identity And Access Management #SSO
Buttercup Landing Page
8

Buttercup

Free and open source password manager for Windows/Mac/Linux
Pricing:
- Open Source
#Password Management #Password Managers #Security & Privacy 9 social mentions
SimpleSAMLphp Landing Page
9

SimpleSAMLphp

SimpleSAMLphp is an OAuth authentication application written in native PHP.
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #Monitoring Tools 4 social mentions
Apache Directory Studio Landing Page
10

Apache Directory Studio

Apache Directory Studio is a complete directory tooling platform intended to be used with any LDAP...
Pricing:
- Open Source
#Personal Finance #Identity And Access Management #Cloud Computing 4 social mentions
Ory Landing Page
11

Ory

Developer-first Access Management
Pricing:
- Open Source
#Identity And Access Management #Identity Provider #SSO 17 social mentions
Nitrokey Landing Page
12

Nitrokey

Email Encryption. Encrypt your emails with GnuPG, OpenPGP, S/MIME or your favourite email client.
Pricing:
- Open Source
#Identity And Access Management #Two Factor Authentication #Authentication 1 social mentions