| Firebase Auth (Google) |
General auth |
Email/password, social logins (Google, Facebook, Apple), phone auth, anonymous, MFA |
Web2 |
Excellent docs, SDKs for Web, iOS, Android, Unity, Flutter |
Easy to set up, trusted infra, scalable |
Not privacy-preserving, limited customization |
| Auth0 (Okta) |
Enterprise-grade auth |
Social, enterprise SSO (SAML, OpenID), MFA, RBAC, rules & hooks, extensibility |
Web2 |
SDKs for all major languages & frameworks |
Highly customizable, good enterprise support |
Can get expensive, vendor lock-in |
| Clerk.dev |
Developer-first auth |
Prebuilt UIs, JWT sessions, MFA, user roles, social logins |
Web2 |
SDKs for React, Next.js, Remix, etc. |
Slick DX, flexible UI or API-based |
Still growing, some features behind paywall |
| Descope |
Passwordless-first |
Email magic link, biometrics, WebAuthn, passkeys, flows, MFA, RBAC |
Web2 |
Great low-code tools & SDKs (JS, React, Node, etc.) |
Focus on security, passwordless UX |
Enterprise use cases still maturing |
| Magic.link |
Wallet-based login |
Passwordless, Web3 login with email, phone, wallet |
Web2 + Web3 |
SDKs for JS, React Native, Unity, iOS |
Easy onboarding for Web3 users, non-custodial keys |
Less flexibility for fully custom flows |
| Web3Auth |
Aggregated wallet login |
Social + wallet auth, MPC, Google login for Web3, modal or no-modal UI |
Web3 |
SDKs for Web, iOS, Android, React Native |
Great UX for dApps, supports self-custody or MPC |
Not suitable for Web2-only projects |
| Privy |
Web3-native auth |
Embedded wallet, session management, social login, phone/email |
Web3 |
SDKs for React, Next.js, etc. |
Fully embedded wallets, dev-first, good UX |
Still limited mobile wallet support |
| Lit Protocol (Lit Auth) |
Decentralized key management |
Programmable access control, key sharding, decentralized auth |
Web3 |
JS SDK, integration with SIWE and threshold cryptography |
Privacy-first, fine-grained auth |
Early-stage, high learning curve |
| AuthKit (by Thirdweb) |
Plug & play Web3 auth |
Sign-in with wallet, embedded wallets, email login (AuthCore) |
Web3 |
SDK for React + Thirdweb ecosystem |
Quick to integrate with Thirdweb stack |
Limited use outside Thirdweb |
| Passport (by Privy) |
Identity layer for Web3 |
Cross-wallet identity, KYC, social verification |
Web3 |
SDK for React + REST APIs |
Smooth UX for Web3 onboarding, composable identity |
Less useful for traditional login scenarios |