FusionAuth

Overview

FusionAuth is the practical self-hosted CIAM choice for teams that want to own their identity stack without building it. Founded in 2018, it ships as a single deployable application you can run anywhere, with a fully managed cloud option for teams that prefer it. Its defining trait is control: the self-hosted Community edition is free with no stated user cap, so teams that run it themselves avoid per-user fees entirely. Paid plans, which bundle hosting, are sized by monthly active users like most CIAM.

What it is good at

Deployment flexibility and pricing are the headline strengths. Self-host on your own infrastructure for data residency and control, or use FusionAuth Cloud, with the same product either way. Starting prices are published, and the free self-hosted edition gives teams a no-license-fee path at any volume. The feature set is broad: OIDC, OAuth, SAML, MFA, passwordless and passkeys, and first-class multi-tenancy, making it a strong fit for B2B SaaS that needs tenant-isolated identity. Developer experience is strong, with thorough APIs, documentation, and a no-time-limit community edition that lets teams evaluate it fully before paying.

Where it falls short

The trade-off of self-hosting is operations: you own upgrades, scaling, and availability unless you choose the managed cloud. It does not carry the analyst-brand recognition of the largest enterprise platforms, which can matter in procurement-heavy deals. Built-in governance and lifecycle are solid for CIAM but are not a substitute for a dedicated IGA tool, and the ecosystem, while healthy, is smaller than the category giants.

Pricing

The Community edition is free and unlimited for self-hosting. Paid plans publish starting prices (Starter from $162 a month, Essentials and Enterprise from $2,970 a month, billed annually), and the pricing page sizes them with a monthly-active-user selector, so confirm how the price moves with your volume rather than assuming a flat licence. Paid plans include hosting (basic, business, or high-availability by tier). Checked against the pricing page on 2026-11-05. Model it against per-MAU competitors with the TCO calculator.

Best for, and who should look elsewhere

Choose FusionAuth when self-hosting, a free path for running it yourself, or strong multi-tenancy drive the decision. For a fully open-source alternative, compare Keycloak and Zitadel; for a managed developer-first SaaS, see Auth0; and for a direct head-to-head, read SuperTokens vs FusionAuth.

Bottom line

The pragmatic self-hosted CIAM: broad features, first-class multi-tenancy, and a free self-hosted edition that sidesteps per-MAU fees, in exchange for owning the operations.