OpenFGA is a dedicated, self-hosted authorization engine for modeling fine-grained relationship-based permissions, while Stytch is a broader identity platform…
Best for OpenFGA: Engineering teams needing deep, Zanzibar-style relationship-based permission modeling — for example, resource- or document-level sharing rules — who are willing to self-host at no licensing cost.
Best for Stytch: Teams needing a managed platform that combines authentication (passkeys, magic links, SSO/SCIM), basic RBAC, machine-to-machine/AI agent auth, and fraud/bot protection in one API, free up to 10,000 monthly active users or AI agents.
At a Glance
OpenFGA
Stytch
Primary category
Security
Security
Rating
Not documented
Not documented
Pricing model
Open Source
freemium/usage-based
Starting price
Free
Free up to 10,000 monthly active users
Free plan
Not documented
Yes
Free trial
Not documented
Not documented
Platforms
Not documented
Not documented
Team collaboration
Not documented
Not documented
AI features
Not documented
Not documented
Public API
Yes
Yes
Key Differences
Product Scope
OpenFGA: OpenFGA is a single-purpose authorization/permissions engine.
Stytch: Stytch is a full identity platform spanning authentication, basic authorization (RBAC), multi-tenancy, and fraud/bot protection.
Teams need to know whether they're comparing a narrow point solution against a broader platform before evaluating either on price or features.
Pricing Model
OpenFGA: OpenFGA is entirely free and open source with no paid plans.
Stytch: Stytch is freemium, free up to 10,000 monthly active users/AI agents with usage-based overages and no hard pricing cliffs.
A zero-cost self-hosted tool versus a managed freemium API changes both upfront cost and ongoing operational responsibility.
Authorization Depth
OpenFGA: OpenFGA offers deep Zanzibar-inspired relationship-based access control with Check, Read, Expand, and ListObjects operations.
Stytch: Stytch documents RBAC in its base tier but doesn't detail ReBAC-style relationship modeling.
Complex sharing and permission models (e.g., nested groups, resource hierarchies) need relationship-based authorization, not just role checks.
Hosting
OpenFGA: OpenFGA must be self-hosted, for example via Docker, with no managed offering.
Stytch: Stytch is a managed API/platform service, not self-hosted.
Self-hosting gives full infrastructure control but requires ops capacity; a managed API removes that burden but ties a team to the vendor's infrastructure.
Fraud and Bot Protection
OpenFGA: OpenFGA does not offer fraud or bot detection, as it's scoped purely to authorization decisions.
Stytch: Stytch includes device fingerprinting and intelligent rate limiting, described as achieving 99.99% bot detection accuracy, with 10,000 free fingerprints per month.
Consumer-facing applications often need fraud/bot protection as part of their identity stack, not as a separate purchase.
Feature-by-Feature
Authorization Depth
Feature
OpenFGA
Stytch
Zanzibar-inspired ReBAC modeling
Available
Not documented
RBAC support
Limited
Available
Millisecond authorization checks
Available
Not documented
Authentication & Identity
Feature
OpenFGA
Stytch
Passwordless login (passkeys, magic links, OTP)
Unavailable
Available
Enterprise SSO / SCIM
Unavailable
Available
Machine-to-machine / AI agent authentication
Not documented
Available
Fraud / bot protection
Unavailable
Available
Deployment & Pricing
Feature
OpenFGA
Stytch
Self-hosted deployment
Available
Unavailable
Managed API / hosted service
Unavailable
Available
Free to use
Available
Limited
Multi-language SDKs
Available
Not documented
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
OpenFGA
Open Source (Self-Hosted) — Free N/A
Stytch
Pay as You Go — Free up to 10,000 MAU Usage-based
Enterprise — Custom (contact sales) Custom
Pros & Cons
OpenFGA
Pros
Fully open source and free with no licensing cost for the core engine
Backed by Okta and Grafana Labs engineers under transparent CNCF governance
Handles ReBAC, RBAC, and ABAC authorization patterns in a single unified system
Built for low-latency performance at scale, following Google's proven Zanzibar model
Broad SDK and integration support across popular languages and identity providers
Cons
Requires engineering effort to design and self-host an authorization model correctly
Steeper learning curve than simple built-in framework authorization for teams new to ReBAC concepts
No official first-party managed OpenFGA hosting outside of Okta's separate Auth0 FGA product
Smaller ecosystem than long-established authorization libraries baked into specific frameworks
As an infrastructure component, it adds an additional service to operate and monitor in production
Stytch
Pros
Strong developer experience and documentation
Generous free tier covering up to 10,000 monthly active users
Flexible building blocks instead of a rigid all-in-one auth widget
Built for both consumer apps and B2B multi-tenant products
Backed by Twilio's infrastructure and reach following the acquisition
Cons
Roadmap and pricing may shift as Stytch integrates into Twilio
Additional SSO or SCIM connections and fraud fingerprints cost extra beyond free allotments
Enterprise features like HIPAA and BAA compliance require a custom contract
Primarily aimed at developers rather than non-technical teams
Email branding removal is a separate one-time fee
Use Cases
Choose OpenFGA: Engineering teams needing deep, Zanzibar-style relationship-based permission modeling — for example, resource- or document-level sharing rules — who are willing to self-host at no licensing cost.
Choose Stytch: Teams needing a managed platform that combines authentication (passkeys, magic links, SSO/SCIM), basic RBAC, machine-to-machine/AI agent auth, and fraud/bot protection in one API, free up to 10,000 monthly active users or AI agents.
Need both: A team could use Stytch to handle authentication, SSO/SCIM, and fraud protection for its application, then layer OpenFGA on top as the dedicated policy engine for fine-grained relationship-based decisions, such as document- or resource-level sharing permissions, that go beyond Stytch's built-in RBAC.
OpenFGA
Multi-tenant SaaS permissions — Model complex organization, team, and resource-level permissions for a multi-tenant SaaS product using relationship-based access control.
Document and file sharing authorization — Implement nested sharing permissions, such as folder-level access that cascades to contained documents, similar to Google Drive.
API and microservices authorization — Centralize authorization checks across distributed microservices with low-latency permission evaluation.
Stytch
Passwordless Login for Consumer Apps — Replacing traditional password login with magic links or one-time passcodes.
B2B SaaS SSO and Multi-Tenant Management — Managing organization-level authentication policies and SSO for business customers.
Machine-to-Machine and AI Agent Authentication — Authenticating API-to-API calls and AI agents using M2M tokens.
Frequently Asked Questions
Do OpenFGA and Stytch compete directly?
Only partially. OpenFGA is purely an authorization/permissions engine, while Stytch bundles authentication, basic RBAC, and fraud protection into one platform.
Is OpenFGA free?
Yes, it's fully free and open source, and must be self-hosted.
Does Stytch have a free tier?
Yes, free up to 10,000 monthly active users/AI agents, 5 SSO/SCIM connections, and 1,000 M2M tokens.
Which tool supports AI agent authentication?
Stytch explicitly supports machine-to-machine authentication for AI agents in its free tier. OpenFGA doesn't document AI-agent-specific authentication, though its authorization checks could still govern agent permissions once authenticated.
Does Stytch offer relationship-based access control like OpenFGA?
This isn't documented. Stytch's features list RBAC but don't describe Zanzibar-style relationship-based access control the way OpenFGA does.
Can OpenFGA be used for fraud or bot protection?
No, this isn't part of OpenFGA's documented feature set. Stytch offers dedicated fraud/bot protection with device fingerprinting and rate limiting.