FusionAuth vs Logto
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
FusionAuth
Complete authentication and authorization platform
VS
Logto
Developer-friendly authentication and authorization platform
| Feature | FusionAuth | Logto |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 70 · Good | 94 · Excellent |
| Category | Identity & SSO | Identity & SSO |
| License | Apache-2.0 | MPL-2.0 |
| Language | Dockerfile | TypeScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 512 MB |
| Deployment | docker, kubernetes, bare-metal | docker, kubernetes, binary |
| GitHub stars | ★ 241 | ★ 14,621 |
| First released | 2018 | 2022 |
| Replaces | Auth0, Okta | Auth0, Firebase Auth, Clerk |
What are FusionAuth and Logto?
FusionAuth
FusionAuth is a self-hostable customer identity and access management platform supporting OAuth, OIDC, SAML, MFA, and user management. The community edition runs free on your own infrastructure.
- OAuth, OIDC and SAML support
- Multi-factor authentication
- User and tenant management
- Themable login pages
Logto
Logto is an open-source identity solution built for developers, offering passwordless sign-in, social login and enterprise SSO. It provides prebuilt sign-in experiences and SDKs for many frameworks.
- Prebuilt customizable sign-in experiences
- Passwordless and social authentication
- Multi-framework SDKs
- Role-based access control
FusionAuth vs Logto: key differences
FusionAuth is written in Dockerfile, while Logto is built with TypeScript. Licensing differs — Apache-2.0 for FusionAuth versus MPL-2.0 for Logto. Logto is the lighter option, starting around 512 MB of RAM against 1,024 MB for FusionAuth. FusionAuth is the more established project (first released 2018), while Logto arrived in 2022. Logto has the considerably larger community, at 14,621 GitHub stars versus 241.
Why pick each one
Choose FusionAuth if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
- Written in Dockerfile
Choose Logto if…
- Great developer experience
- Modern UI and SDKs
Watch out for
- Younger project with evolving APIs
Frequently asked questions
Is FusionAuth or Logto better?
Neither is universally better. Logto has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are FusionAuth and Logto free and open-source?
Yes. FusionAuth is licensed under Apache-2.0 and Logto under MPL-2.0. Both can be self-hosted at no software cost.
Can I run FusionAuth and Logto with Docker?
FusionAuth: yes. Logto: yes.
Which is lighter on resources, FusionAuth or Logto?
Logto has the smaller minimum footprint at 512 MB of RAM, compared to about 1,024 MB for FusionAuth. Real-world usage depends on library size, user count, and enabled features.