Auth0 Organizations: what they solve, what they cost, and where the limits are

Short answer: Auth0 Organizations are a B2B feature: each organization represents a customer or partner, with its own members, roles, branding and enterprise connections inside one Auth0 tenant. The number of organizations is capped by plan: 5 on Free, 10 on the paid B2C plans, and unlimited on the paid B2B plans. The B2B plans also cost more and include a fixed number of enterprise SSO connections; extras are $100 per connection per month.

If you are building a B2B SaaS product, the question is usually not "what is an organization" but "does this model fit the way we sell, and what does it cost at 50 or 500 customers".

What an organization is

An organization is a logical grouping of users inside a tenant. Auth0 describes them as a way to represent business customers and partners, manage membership, configure branded federated login flows per business, and offer machine-to-machine access to B2B APIs.

In practice, an organization gives you:

• Per-organization branding, so each customer sees its own name and logo on the login page.
• Per-organization connections, so customer A can use its own Entra ID or Okta tenant while customer B uses a different one.
• Members and roles, so a customer's administrators can be scoped to their own users.
• Organization metadata, for tenant-specific settings your application needs.

What it does not give you is physical or configuration isolation. Organizations share the tenant, the user pool and most of the configuration. If a customer requires a separate tenant, a separate database or a separate region, organizations are not the tool.

Limits by plan

Auth0 publishes the organization limits in its pricing table:

The important line is the gap between B2C and B2B. A B2C plan can create a handful of organizations, but the feature set that most B2B products need, enterprise connections at scale, is packaged in the B2B plans.

What the B2B plans cost

Auth0 prices B2B separately from B2C. Entry prices, per month:

The price rises with MAU in steps. Annual billing is 11 times the monthly price, so it is one month free rather than a discount percentage.

Two costs are easy to miss:

• Extra enterprise connections are $100 per month each, capped at 30 total. At 50 customers with their own IdPs, that is 45 extra connections, or $4,500 per month on top of the plan.
• M2M tokens are metered separately. Professional includes 5,000; the add-on starts at 2,500 tokens for $10 per month.

Organizations or separate tenants?

Both models are valid, and the choice is mostly about isolation versus operations.

Use organizations when customers share your application, your login experience and your operational model, and each needs its own branding, connections and members. One tenant means one configuration to maintain, one set of rules and one place to look when something breaks.

Use separate tenants when a customer requires a separate user pool, a separate region, separate rate limits or a contractual boundary. Tenants give stronger isolation, but every tenant is another configuration to manage, and cross-tenant features become harder.

A common compromise is organizations for most customers and a dedicated tenant for the few that require it. That works, but it doubles the operational surface for those few.

When the Auth0 model fits

Auth0 Organizations are a good fit when:

• your customers are businesses that bring their own identity provider;
• you want a mature B2B feature set without building tenant-aware login yourself;
• your MAU count is modest or your price per seat can absorb per-MAU pricing;
• you value the Auth0 ecosystem, rules and marketplace more than a flat bill.

They fit less well when:

• you have hundreds of customers, each with an enterprise connection, and the per-connection add-on dominates the bill;
• your users sign in rarely, so MAU-based pricing is hard to predict;
• you need self-hosting, data residency in a specific country, or LDAP and RADIUS for devices;
• you want the same platform to cover employees and customers.

The open-source alternative: Casdoor organizations

Casdoor has an organization model with the same shape: each organization has its own users, applications, identity providers, roles and branding, and organization administrators can manage their own members. The difference is the commercial model.

• No per-organization limit. Organizations are part of the open-source product, not a plan tier.
• No per-connection fee. Customer A can use Entra ID and customer B can use Okta without an add-on line item.
• Flat pricing. Casdoor Cloud is a dedicated instance from $9 per month with unlimited users; self-hosting is free.
• More protocols in one place. OIDC, SAML, CAS, LDAP, RADIUS and SCIM, with Casbin authorization built in.

The trade-off is that Casdoor is not Auth0. It does not have Auth0's marketplace, and if you need a vendor with SOC 2 or ISO 27001 reports for the hosted service today, Casdoor Cloud does not have them yet; teams with that requirement self-host Casdoor in their own certified environment.

Migration notes

If you are moving B2B tenants from Auth0 to Casdoor:

1. Map each Auth0 organization to a Casdoor organization. Users, roles and metadata have a direct counterpart.
2. Recreate enterprise connections per organization. SAML and OIDC connections need new metadata or a new issuer URL and client credentials; the customer's IdP administrator usually has to update their side.
3. Decide what happens to passwords. Auth0 can export password hashes on some plans, but the hash format and the import path need to be verified before promising users they can keep their passwords.
4. Move one customer at a time. Start with an internal test organization, then a friendly customer, then the rest.
5. Keep the old tenant readable during the transition, so support can answer questions about historical accounts.

For the pricing background, see Auth0 pricing. For the full platform comparison, see Casdoor vs Auth0.

FAQ

How many organizations does Auth0 allow? Five on the Free plan, ten on the paid B2C plans, and unlimited (subject to system limits) on the paid B2B plans.

Do Auth0 Organizations cost extra? The organization feature is part of the plan; the cost is the B2B plan itself and any extra enterprise connections beyond the included number.

How much is an extra enterprise connection? $100 per month or $1,100 per year each, with a maximum of 30 total connections on the B2B plans.

What is the difference between an organization and a tenant? An organization is a logical grouping inside one tenant. A tenant is a separate configuration and user pool. Organizations are simpler to operate; tenants give stronger isolation.

Can Casdoor replace Auth0 Organizations? For the B2B tenant model, yes: Casdoor organizations have their own users, applications, providers and roles, with no per-organization limit or per-connection fee. Check the protocol and migration details against your own tenants before committing.