Okta is your front door and your IdP. B5 is the enforcement behind it, in .NET.
Okta runs workforce and customer identity, and Okta FGA externalizes fine-grained authorization as a service. An IdP decides who you are at the edge; an external FGA service decides in a synced store. Both still depend on your application to honor the answer at the action. B5 is that enforcement — idiomatic in .NET, in-process, with nothing copied to an external store.
Framing: Use Okta as the IdP and front door. Use B5 to enforce each action in your .NET tier, with no tuple store to sync.Okta owns the front door — and the “broken access control is OWASP #1” framing.
Okta’s developer-first reach and its framing of broken access control as the number-one application risk are genuinely useful, and B5 inherits Okta’s identities rather than competing for them. The difference is where authorization is decided and enforced. Okta FGA externalizes the decision to a service and a synced relationship store; B5 keeps the decoupled-policy benefit but co-locates decision and enforcement in-process — no external store, no sync, no hot-path round trip.
Borrow this, don’t fight it
- Dominant workforce and customer IdP with deep federation and SSO
- Okta FGA brings Zanzibar-style relationship modeling to authorization
- Developer-first ecosystem and the OWASP broken-access-control narrative
- Conditional access and adaptive signals at the edge
Decide at the edge or in a synced store; enforce… where?
- The IdP decision is made at the edge; the action runs later, inside your code
- Okta FGA requires calling an external service and often copying authorization data to its store
- An external FGA service is another live dependency, sub-processor question, and round trip
- B5 evaluates [Permission] in-process at the method — the decoupled benefit without the external store
Okta decides. B5 enforces — at the line of code.
| Okta (+ Okta FGA) | B5 Secure | |
|---|---|---|
| Locus of enforcement | Edge (IdP) + external FGA service / synced store | In-process, at the call site |
| New live attack surface | Yes — operated services | No added service or endpoint |
| Authorization data leaves your boundary | Relationship tuples sync to the FGA store | No — evaluated in-process |
| New sub-processor for the customer | Yes | No |
| .NET integration | SDK, generic | Idiomatic [Permission] attributes & middleware |
| Agent identity model | First-class (IdP) / resource-scoped (FGA) | First-class + in-process enforcement today; agent OBO + ephemeral scope is a Q4 2026 roadmap extension |
| Best role in your architecture | Authenticate & model decisions | Enforce the decision where it executes |
Capability status. In-process [Permission] enforcement Generally Available Agent OBO delegation, ephemeral SPIFFE-compatible agent identity and CAEP/SSF signal ingestion are Q4 2026 roadmap extensions Preview.
The questions a buyer actually asks
We use Okta for SSO and are looking at Okta FGA.
Keep Okta as the IdP — B5 consumes its identities. For authorization, ask whether you want to copy relationship data to an external store and call out per action, or evaluate the decision in-process at the method. B5 gives you the decoupled-policy model natively in .NET, with no sync.
Isn’t Okta FGA already “fine-grained”?
It models fine-grained decisions well. B5’s point is locus: a decision modeled in an external service still has to be enforced in your code. B5 makes the .NET method itself the enforcement point — attribute-driven, evaluated every call, no external lookup on the hot path.
Do we have to choose?
No. Okta authenticates and can model; B5 enforces in the .NET tier inside your boundary. For regulated FIs, that split also shortens the Trust Center conversation — B5 adds no new sub-processor or data-residency question.
Complementary, not competitive.
Okta authenticates; B5 enforces every action in .NET.
Let Okta be the IdP and the front door, and (if you choose) model relationships in Okta FGA. Let B5 enforce the resulting decision in-process at each .NET method — designed to bind agent OBO scope to the call site (H2 2026) and keeping authorization data inside your boundary. The front door is necessary; the enforcement behind it is where money moves.
Keep your IdP. Add the enforcement layer it assumes your code provides.
Bring your architecture to a B5 architect. We’ll show you exactly where Okta ends and where in-process enforcement begins — and the Trust Center a library, not a platform, gets to publish.
See enforcement at the record. Live.
Thirty minutes with a B5 engineer: your stack, the B1–B5 pipeline, and a data-element authorization decision you can watch happen — for humans, services, and AI agents alike.