{"slug":"better-auth","name":"Better Auth","domain":"better-auth.com","verdict":"As of 2026-07-20, ChatGPT, Claude, Gemini, Grok collectively rank Better Auth first for authentication library for next.js applications (one of 2 leaderboards it appears on). Source: https://modelsagree.com/product/better-auth (modelsagree.com, CC BY 4.0).","best_rank":1,"categories":2,"entries":[{"slug":"best-authentication-library-for-nextjs-applications","title":"Best authentication library for Next.js applications","rank":1,"of":6,"score":19,"appearances":4,"modelRanks":{"ChatGPT":1,"Claude":1,"Gemini":2,"Grok":1},"reason":"Best overall value for teams wanting open-source, database-owned authentication with first-class Next.js 16 support, strong TypeScript ergonomics, and plugins for organizations, passkeys, MFA, SSO, and SCIM; a near-tie with Clerk, ranked first assuming the team can operate its auth database","reasons":[{"model":"ChatGPT","reason":"Best overall value for teams wanting open-source, database-owned authentication with first-class Next.js 16 support, strong TypeScript ergonomics, and plugins for organizations, passkeys, MFA, SSO, and SCIM; a near-tie with Clerk, ranked first assuming the team can operate its auth database"},{"model":"Claude","reason":"TypeScript-first open-source library that became the community default for self-hosted auth in Next.js; owns your database schema and sessions with no vendor lock-in, ships a broad plugin ecosystem (2FA, passkeys, organizations/multi-tenancy, magic links) that previously required paid services, and its App Router/server-actions integration is first-class; active, fast-moving maintenance contrasts sharply with NextAuth's stagnation, which materially shaped ranking it above Auth.js"},{"model":"Grok","reason":"Full data ownership with sessions in your DB for immediate revocation; modern TypeScript-first plugin architecture with excellent Next.js 16 App Router/middleware support; active maintenance (took over Auth.js); strong for self-hosted SaaS with multi-tenancy and extensibility; aligns with typical practitioner preference for control without vendor lock-in in 2026."},{"model":"Gemini","reason":"Comprehensive TypeScript-native open-source auth framework offering zero vendor lock-in, direct ORM integration with Drizzle and Prisma, modular plugin architecture, and full data ownership. Flags a near-tie with Clerk for teams requiring self-hosted infrastructure."}],"fixes":[{"model":"ChatGPT","fix":"You own deployment, email flows, security configuration, migrations, and incident response, so it is not the lowest-operations choice"},{"model":"Claude","fix":"You run it — password reset emails, rate limiting, session-store scaling, and security hardening are your operational burden; teams wanting zero auth ops or prebuilt polished UI are better served by a hosted provider"},{"model":"Gemini","fix":"Requires self-managing database tables, session storage, and email transport without plug-and-play hosted UI suites."},{"model":"Grok","fix":"Requires more initial setup and infrastructure management than managed services (not for teams prioritizing zero-maintenance speed over ownership)."}],"updated":"2026-07-20","rank_history":{"days":["2026-07-19","2026-07-20"],"ranks":[1,1]},"api":"https://modelsagree.com/api/v1/best/best-authentication-library-for-nextjs-applications.json"},{"slug":"best-auth-provider","title":"Best authentication provider for web apps","rank":5,"of":10,"score":4,"appearances":2,"modelRanks":{"ChatGPT":4,"Claude":4},"reason":"Strongest self-hosted choice for TypeScript applications, combining ownership and portability with sessions, social login, organizations, 2FA, passkeys, and extensible plugins without per-user fees","reasons":[{"model":"ChatGPT","reason":"Strongest self-hosted choice for TypeScript applications, combining ownership and portability with sessions, social login, organizations, 2FA, passkeys, and extensible plugins without per-user fees"},{"model":"Claude","reason":"The strongest open-source option for the modern TypeScript stack — auth lives in your own database with no per-MAU fees, a rich plugin system (2FA, organizations, passkeys, SSO), and it became the de facto default for new TS projects by 2025–2026. Near-tie with Keycloak — Better Auth wins for TS teams, Keycloak for polyglot/enterprise self-hosting."}],"fixes":[{"model":"ChatGPT","fix":"You own availability, abuse prevention, upgrades, and security operations, and its TypeScript-first scope excludes teams wanting a fully managed language-neutral service"},{"model":"Claude","fix":"TypeScript-only and self-operated — you own security patching, token storage, and scaling, and it lacks the compliance attestations a managed provider hands you."}],"updated":"2026-07-15","rank_history":{"days":["2026-06-29","2026-07-08","2026-07-09","2026-07-10","2026-07-14","2026-07-15"],"ranks":[null,5,null,6,5,6]},"reasoning_shift":[{"model":"ChatGPT","from":"2026-07-14","to":"2026-07-15","added":[{"t":"ownership and portability","q":"combining ownership and portability"},{"t":"sessions, social login","q":"sessions, social login"},{"t":"fully managed language-neutral service","q":"fully managed language-neutral service"}],"dropped":[{"t":"broad database and framework support","q":"broad database and framework support"},{"t":"SSO, SCIM, API keys","q":"SSO, SCIM, API keys, and OAuth-provider capabilities"},{"t":"email delivery","q":"email delivery"}]},{"model":"Claude","from":"2026-07-10","to":"2026-07-14","added":[{"t":"Keycloak suits polyglot enterprise hosting","q":"Keycloak for polyglot/enterprise self-hosting"},{"t":"TypeScript-only","q":"TypeScript-only"},{"t":"Lacks compliance attestations","q":"it lacks the compliance attestations a managed provider hands you"}],"dropped":[{"t":"Full data ownership","q":"full data ownership with no vendor lock-in"},{"t":"Multi-tenancy plugin coverage","q":"multi-tenancy"}]}],"api":"https://modelsagree.com/api/v1/best/best-auth-provider.json"}],"page":"https://modelsagree.com/product/better-auth","check":"https://modelsagree.com/check?q=Better%20Auth","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}