Best Auth Providers With Social Login, Magic Links & Passkeys (2026)

Hanko is the clearest pick if you're building auth from scratch in 2026 and want passkeys to be a first-class citizen rather than a bolted-on extra. Where most providers treat passkeys as 'one more method' alongside passwords, Hanko was designed from the ground up around the passkey era — and that shows in the details. The Hanko Elements library ships drop-in web components that work in React, Vue, Svelte, or vanilla JS, and the conditional UI handling automatically prompts users with stored passkeys without requiring a 'Sign in with passkey' button at all.

For the social-login + magic-link + passkey trifecta, Hanko nails the integration. Social providers (Google, GitHub, Apple, Microsoft) plug in via config, magic links are built-in with no extra service required, and passkeys use FIDO2-certified flows. The fact that it's open-source under AGPL with a self-hosting option means you're never locked in — you can run Hanko Cloud during early growth and switch to self-hosted at scale without rewriting your auth layer. The free tier covers 10,000 MAU, and qualifying startups get up to 1M MAU free.

The trade-off is maturity: Hanko is a smaller company than Auth0 or Firebase, so the ecosystem of third-party integrations and Stack Overflow answers is thinner. For most product teams that's a fair exchange for cleaner DX.

Logto is the pragmatic choice for B2B SaaS teams that need all three modern auth methods plus first-class multi-tenancy. Where Hanko optimizes for passkey UX and Auth0 optimizes for enterprise breadth, Logto sits in the sweet spot: it ships social login (Google, GitHub, Apple, Microsoft, plus regional providers), magic links via email, and WebAuthn passkeys as a built-in MFA method — all on a modern OIDC/OAuth 2.1 foundation. The 50K MAU free tier is the most generous in this entire list, which makes Logto especially attractive for early-stage SaaS that's pre-revenue but post-product-market-fit.

What sets Logto apart for the social + magic + passkey use case is the organization model. If you're building a B2B SaaS where one user might belong to multiple companies, or each tenant needs its own SSO config, Logto handles this out of the box — no custom claims logic, no fragile mapping tables. Org-level RBAC, per-tenant branding, and tenant-aware sign-in flows are core features rather than enterprise upsells.

The SDKs cover 30+ frameworks including a polished Next.js App Router integration, and the pre-built sign-in UI is fully themable. As an open-source platform with both cloud and self-host options, Logto offers the same lock-in escape hatch as Hanko and SuperTokens.

Auth0 is still the default safe choice when you need every modern auth method plus the deepest catalog of enterprise integrations on the market. For the social login + magic link + passkey combination, Auth0's Universal Login handles all three in a single hosted flow — 30+ social providers, passwordless email/SMS, and WebAuthn passkeys are all supported. The Actions framework lets you customize every step of the login pipeline with serverless code, which is the only way some advanced flows (progressive enrollment, custom passkey conditional logic) can be built cleanly.

Where Auth0 really separates from the open-source pack is in the layers around auth: breached password detection, anomaly detection, adaptive MFA, and compliance certifications (SOC 2, HIPAA, ISO 27001) are built in. If you're selling into regulated industries or large enterprises, that audit trail is non-negotiable, and you don't want to build it yourself.

The cost is, well, cost. The 25K MAU free tier is genuinely useful, but Essential ($23/mo) only takes you so far before you're talking Professional ($700+/mo) or Enterprise (~$30K+/year). For consumer apps with millions of MAU, Auth0 becomes the most expensive line item on the bill — which is why Hanko and Logto exist.

SuperTokens is the pick when data ownership trumps every other criterion. As a YC-backed open-source project, SuperTokens lets you self-host the entire auth stack with unlimited MAU at zero licensing cost — your user table lives in your own database, not somebody else's. For teams in privacy-sensitive industries or geographies (healthcare, EU GDPR-strict environments, government), this matters more than DX polish.

On the modern-auth criteria, SuperTokens covers all three: social/OAuth 2.0 login (Google, GitHub, Apple, Facebook, plus custom OIDC providers), magic-link and OTP passwordless via email or phone, and TOTP-based MFA. Passkey support is available via the Multi-Factor Authentication recipe but isn't quite as polished as Hanko's conditional UI implementation — it's there, it works, but you'll write a bit more glue code.

Where SuperTokens shines is the session management layer. Built-in protection against XSS, CSRF, and session fixation, plus automatic session theft detection, makes it more security-aware than most managed competitors. The managed cloud free tier (5K MAU, then $0.02/MAU) is reasonable, but the real value is the self-hosted path — for teams comfortable running their own infrastructure, this is the cheapest scalable option in the list.

Firebase Authentication is the path of least resistance if you're already inside the Google Cloud ecosystem — and that's both its strength and its limitation. For social login, Firebase has first-class support for Google, Facebook, Apple, Twitter/X, GitHub, and Microsoft with one-line SDK calls. Email link (magic link) sign-in is built in. Passkey support arrived via the Firebase Identity Platform layer and works, though it requires explicit enrollment flows rather than the conditional UI approach Hanko offers.

The real selling point is integration. If your backend is already Firestore, Cloud Functions, and Firebase Hosting, then Firebase Auth is the only choice that doesn't introduce cross-vendor friction. Security rules can reference auth state directly, custom claims propagate to ID tokens automatically, and the Admin SDK is mature across every major language.

The limitations show up at scale. The Identity Platform tier (which you'll need for passkeys, SAML, and multi-tenancy) is priced per verification, which can become unpredictable for high-traffic apps. And while Firebase Auth is excellent for consumer apps and mobile-first products, the multi-tenant and B2B story is noticeably weaker than Logto or Auth0. Most teams that outgrow Firebase Auth end up migrating to Auth0 or a self-hosted option — and that migration is harder than it should be because Firebase user IDs and ID token formats are Firebase-specific.