# supertokens-vs-fusionauth

Source: https://startwithidentity.com/compare/supertokens-vs-fusionauth/
Last updated: 2026-08-29
License: content by Start with Identity. Cite the source URL.

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## The honest comparison

[SuperTokens](https://startwithidentity.com/vendors/ciam/supertokens/) and [FusionAuth](https://startwithidentity.com/vendors/ciam/fusionauth/) score 4.2 and 3.8, and they attract the same buyer: a team that has priced per monthly active user [CIAM](https://startwithidentity.com/guides/fundamentals/what-is-ciam/) at consumer volume and did not like the answer, or that cannot send identity data to a third party.

SuperTokens has an open-source core under a permissive model, with a managed cloud and paid add-ons for advanced features and MFA. Self-hosted, you pay only for infrastructure, and the escape hatch if the commercial direction changes is real because the core is open.

FusionAuth is self-hosted first with flat per-instance licensing: a free, full-featured community edition plus paid editions adding advanced capability and support. It is not open source, but the licensing economics are the flattest in the category, since cost does not move as users grow.

Both are genuine alternatives to per-MAU pricing. Neither removes the operational cost, which is the part teams consistently underestimate, because you now own availability for the system that gates every login.

## When SuperTokens wins

- You want an open-source core with a real licence rather than a free tier of a commercial product
- A managed cloud option matters as a fallback if self-hosting becomes a burden
- Active community and public development are part of the evaluation
- You want to start self-hosted with a supported path to managed later

## When FusionAuth wins

- Flat per-instance licensing is the point, and you want cost that does not move with user growth
- Multi-tenant self-hosted deployments where one instance serves many applications
- You want a full-featured community edition without a per-user ceiling
- Advanced features and vendor support available as a paid upgrade on the same deployment

## Pricing

SuperTokens self-hosted core is free and open source; you pay infrastructure only. Managed cloud and paid add-ons are transparently priced, and because cost does not scale punitively with users when self-hosted, the comparison against per-MAU competitors is usually decisive at volume.

FusionAuth uses flat per-instance licensing with a free community edition and paid editions for advanced features and support. Model both against a per-MAU incumbent at your projected user count with the [TCO calculator](https://startwithidentity.com/tools/tco-calculator/), and include an engineer's time for operations, because that is the line that decides whether self-hosting was the cheaper choice.

## Verdict

For teams that want a true open-source core with an option to move to managed, [SuperTokens](https://startwithidentity.com/vendors/ciam/supertokens/). For self-hosted deployments where flat licensing at any user count is the requirement, [FusionAuth](https://startwithidentity.com/vendors/ciam/fusionauth/). If neither operational burden is acceptable, revisit managed CIAM and price it honestly. See [FusionAuth vs Keycloak](https://startwithidentity.com/compare/fusionauth-vs-keycloak/), [Keycloak vs Zitadel](https://startwithidentity.com/compare/keycloak-vs-zitadel/), and [best CIAM for high scale](https://startwithidentity.com/rankings/best-ciam-for-high-scale/).