Authentication

285+ open-source auth tools — OAuth, SSO, passkeys, MFA, and session management. Alternatives to Auth0, Clerk, and Firebase Auth.

AliasVault

End-to-end encrypted password manager with a built-in email alias generator and server

Authentication
password-manageremail-aliasencrypted
Visit →
Auth0

Authentication & authorization as a service

Authentication
identityssomfa
Visit →
Corbado

Passkey-first authentication as a service

Authentication
passkeyspasswordlessmfa
Visit →
Bearer

Static application security testing (SAST) tool for JavaScript and Ruby stacks

Authentication
api-securitysensitive-datamisconfiguration
Visit →
arkworks-rs/circom-compat

Arkworks bindings to Circom's R1CS, for Groth16 Proof and Witness generation

Authentication
rustcircomzk-snarks
Visit →
acmetool

ACME (Let's Encrypt) client tool with automatic renewal

Authentication
goacmeletsencrypt
Visit → 2091★
kpcyrd/authoscope

A scriptable network authentication cracker

Security Tools
authenticationoauthdebug
Visit → 415★
pii-shield

Zero-code log sanitization sidecar for Kubernetes that redacts PII from logs

Authentication
gopiidata-masking
Visit → 45★
leakhound

Static analysis tool to detect accidental logging of sensitive struct fields, preventing data leaks in logs

Authentication
gosecretleak
Visit → 13★
FusionAuth

Security-centric authentication as a Service, including self-hosting

Authentication
ssomfaoauth
Visit →
acopw-go

Small cryptographically secure password generator package for Go

Authentication
password-generatorgolibrary
Visit →
AWS Cognito

AWS's authentication as a service

Authentication
awsmanageduser-auth
Visit →
Compare tools: Lucia Auth vs keyper · keyper vs SSOReady · SSOReady vs Arctic