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    Auth.js preview

    Auth.js Reviews, pricing and alternatives 2026

    Open-source library for adding flexible authentication to JavaScript apps.

    Best for
    What it does
    Security

    Auth.js

    ToolTrim Verdict
    4.4/5
    Very good

    Auth.js fits developers seeking free, flexible OAuth; for fully managed needs, SaaS like Auth0 fits better.

    Visit websiteExplore around Auth.js

    Pricing verified on

    Practical uses

    • Implement OAuth in Next.js app in minutes.
    • Add social login (GitHub, Discord) to a project.
    • Reduce server load for authentication in production.

    Pros and cons

    What Auth.js does especially well — and the limits to anticipate.

    Pros

    • Entirely free, no hidden costs.
    • Highly flexible and framework-agnostic.
    • Large ecosystem of integrated OAuth providers.
    • Mature, well-maintained open-source project.

    Cons

    • Initial configuration requires development knowledge.
    • No official commercial support included.
    • No admin UI dashboard for simplified administration.

    Auth.js: when it makes sense.

    Auth.js fits developers seeking free, flexible OAuth; for fully managed needs, SaaS like Auth0 fits better.

    Keep if

    You're building a modern web app with popular frameworks.. You want OAuth without paying for a SaaS auth solution.

    Challenge if

    You need commercial support and guaranteed SLAs.. You're not comfortable with Node.js or React.

    How much does Auth.js cost?

    Free0 €

    Free or open source depending on usage

    Paid plan

    Paid options may apply depending on hosting, team, or volume

    Best alternatives to Auth.js.

    Direct substitutes

    Axe DevTools logoAxe DevToolsBurp Suite logoBurp SuiteClerk logoClerkCloudflare logoCloudflareDependabot logoDependabotGitHub Advanced Security logoGitHub Advanced Security

    Auth.js Summary

    Category
    tool.
    Price from
    Free.
    Best for
    professionals.
    Avoid if
    You need commercial support and guaranteed SLAs.; You're not comfortable with Node.js or React..
    ToolTrim verdict
    Auth.js fits developers seeking free, flexible OAuth; for fully managed needs, SaaS like Auth0 fits better.

    Our verdict on Auth.js.

    Why this verdict

    Very good

    Auth.js is hard to replace short-term, a free tier to test before paying, clearly documented use cases.

    Tool FAQ

    Frequently asked questions about Auth.js

    Pricing, usage, alternatives, and context: useful answers before adding one more tool to your stack.

    What is Auth.js used for?

    Open-source library for adding flexible authentication to JavaScript apps.

    How much does Auth.js cost?

    Auth.js costs €0 (free). Price verified on 2026-03-29.

    Is Auth.js suitable for beginners?

    Auth.js suits most professionals. See the "Who is it for" section for details.

    Is Auth.js worth the price?

    Auth.js fits developers seeking free, flexible OAuth; for fully managed needs, SaaS like Auth0 fits better.

    What are the best alternatives to Auth.js?

    No direct alternative listed.