Best Auth and Access Tools for B2B SaaS

Frontegg, Ory, and ZITADEL all live closer to the identity side of the stack. They help products authenticate users, manage organizations, support SSO and SCIM, and create the kinds of account structures B2B SaaS teams need. Permit.io sits further into authorization, where the real challenge is modeling who can do what after the user is already inside the product.

That distinction matters because many teams overbuy identity and underinvest in authorization. A polished login flow does not solve entitlement sprawl, multi-tenant resource permissions, or policy change management. Conversely, a strong authorization tool does not replace customer identity or enterprise login support.

Frontegg is the most explicitly productized B2B SaaS choice here. It is built around the reality that software companies need enterprise-ready customer IAM quickly. Ory feels more infrastructure-like and modular, which appeals to teams that want more architectural control. ZITADEL offers a simpler pricing ladder with a flexible cloud-to-self-host path. Permit.io is different again because its center of gravity is product authorization rather than authentication.

That means buyers should think about internal team shape as much as features. If the team wants a faster product wrapper, Frontegg is attractive. If it wants primitives and more control, Ory is stronger. If it wants a cleaner middle path, ZITADEL can be compelling. If the real pain is permissions, Permit is often the most important buy.

All four products publish enough pricing information to be useful, but they meter value differently. Frontegg emphasizes included monthly users and enterprise connections. Ory meters identity usage more explicitly across aDAU, machine-to-machine tokens, and permission checks. ZITADEL uses a clearer plan ladder with DAU thresholds and paid add-ons. Permit.io prices around MAU and tenants because it is solving product authorization, not only identity.

That means the right cost comparison is not just 'who is cheapest.' It is which pricing model matches the way your product and customers actually grow.