FusionAuth

Single-tenant CIAM you can self-host for free (Community) or run on FusionAuth Cloud, priced in MAU brackets with unlimited identity providers.

Teams wanting a single-tenant CIAM they can either run themselves or buy hosted get both options here. Self-hosting the Community edition is free with unlimited MAU, though it is free rather than open source. The cloud Starter plan is priced in MAU brackets, from $162/month at 10k to $837 at 100k billed annually, with contact sales above that. SAML v2 and OIDC identity providers are unlimited on every plan, avoiding the per-connection fees of Clerk, Descope or Stytch, but Business and HA hosting cost extra.

Headquarters: 🇺🇸 United States
Parent jurisdiction: 🇺🇸 United States
EU self-serve plan: Available; check eligible plans and regions
GDPR DPA: Yes
Billing: subscription
Free tier: Community edition is free with unlimited MAU when self-hosted; Community on FusionAuth Cloud from $37/month.
Open source: No · self-hostable
Website: fusionauth.io
Source last checked: 2026-10-06
Pricing evidence: Published rates

Pricing

Calculated from the listed vendor rates; exclusions still apply. How to read these estimates.

Plan	Base fee / month
Starter 10k MAU	$162
Starter 25k MAU	$312
Starter 50k MAU	$462
Starter 75k MAU	$687
Starter 100k MAU	$837

Allowances, plan limits & calculation details

Rates are shown at their recorded precision. A zero means no charge in this calculation; the vendor may charge for things we leave out. See the notes for usage assumptions and currency conversions.

Starter 10k MAU

Base fee / month: $162
Included monthly active users (thousands): 10
1k additional active users: $0
Included enterprise connections: 0
Enterprise connection / month: $0
1k SSO active users: $0
Modeled plan limits: ≤ 10 monthly active users (thousands)

Starter 25k MAU

Base fee / month: $312
Included monthly active users (thousands): 25
1k additional active users: $0
Included enterprise connections: 0
Enterprise connection / month: $0
1k SSO active users: $0
Modeled plan limits: ≤ 25 monthly active users (thousands)

Starter 50k MAU

Base fee / month: $462
Included monthly active users (thousands): 50
1k additional active users: $0
Included enterprise connections: 0
Enterprise connection / month: $0
1k SSO active users: $0
Modeled plan limits: ≤ 50 monthly active users (thousands)

Starter 75k MAU

Base fee / month: $687
Included monthly active users (thousands): 75
1k additional active users: $0
Included enterprise connections: 0
Enterprise connection / month: $0
1k SSO active users: $0
Modeled plan limits: ≤ 75 monthly active users (thousands)

Starter 100k MAU

Base fee / month: $837
Included monthly active users (thousands): 100
1k additional active users: $0
Included enterprise connections: 0
Enterprise connection / month: $0
1k SSO active users: $0
Modeled plan limits: ≤ 100 monthly active users (thousands)

Prices from the pricing-page slider, billed annually and including basic cloud hosting. Starter is $162/month up to 10k MAU, $312 at 25k, $462 at 50k, $687 at 75k and $837 at 100k; above 100k it's contact sales. Essentials ($240 at 1k MAU, $800 at 5k, $1,500 at 10k, $2,500 at 25k) adds support and advanced threat detection. Enterprise adds the SSO tenant manager and HA hosting. SAML v2 and OIDC identity providers are unlimited on every plan, so there is no per-connection fee. The Community edition is free, not open source, and unlimited when self-hosted (you pay for hosting and maintenance). Community hosted on FusionAuth Cloud costs $37/month on a single dev/test-grade server. Business hosting ($225/month) and HA hosting ($500/month) are extra. Cloud deployments can be placed in EU AWS regions. FusionAuth is based in Denver, Colorado.

Managed alternatives

At 50K monthly active users, no enterprise SSO connections. Adjust usage and requirements.

FusionAuth: $5,544/yr estimated.

Clerk: $0/yr estimated · $5,544/yr bill differencePublished rates
Firebase Authentication / Google Identity Platform: $0/yr estimated · $5,544/yr bill differencePublished rates
Logto: $0/yr estimated · $5,544/yr bill differenceModeled ratesAssumes one access token per MAU per month; frequent token issuance increases cost. Paid feature add-ons are excluded.
Supabase Auth: $0/yr estimated · $5,544/yr bill differencePublished rates
WorkOS: $0/yr estimated · $5,544/yr bill differencePublished rates

The price difference leaves out migration costs, operating costs and any features you’d need to replace.

Self-hosted options

Operating cost is not estimated. These options are not counted as savings against managed services.

Other authentication comparisons

Found a wrong rate or plan restriction? Report a correction with a current source.