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Fusio

Free#24 of 36 in API Management SoftwareApi 1 Rest Apis API Marketplace Software +1 more

Fusio: A self-hosted API platform with gateway, portal, analytics, security, and monetization tools. Ranked #24 of 36 in API Management Software by our editors (6.6/10); pricing: Open source; best for open-source API builders with monetization needs.

6.6/10Editor score

Visit Fusio

Fusio6.6 Visit Fusio

At a glance

Editor score
6.6 / 10
Pricing
Open source
Best for
Open-source API builders with monetization needs
Paid from
Free
Deployment model
Self_hosted
Facts checked
20 Sep 2026

Where it wins
- Combines gateway, portal, analytics, OAuth2, validation, and versioning
- Supports plans, quotas, and subscription billing for API monetization
- Connects databases, services, queues, payment tools, and cloud infrastructure
Where it doesn't
- Self-hosted deployment requires technical ownership of the platform
- Custom actions are limited to PHP, JavaScript, Python, and Java/Groovy
- Open-source delivery may not suit teams seeking managed product tiers

Our verdict on Fusio

Fusio is an open-source API management platform for developers and organizations that need to build, expose, secure, document, monitor, and monetize APIs. Primarily self-hosted, it provides an administrative backend, an API gateway for database and microservice backends, a developer portal, analytics, OAuth2 authorization, scoped access control, schema validation, API versioning, and SDK generation. It is a strong fit for teams that want control over their API stack and need product capabilities around publishing and monetization rather than only traffic routing.

Fusio's pricing model is open source. Its monetization features let an operator configure API plans, quotas, and subscription billing for that operator's APIs; these are not Fusio product subscription tiers. The platform connects with MySQL, PostgreSQL, MongoDB, Redis, HTTP/REST, SOAP, AMQP, Elasticsearch, Amazon Web Services, Stripe, PayPal, and SMTP. That combination supports API backends, infrastructure, payment collection, messaging, and developer-facing operations, while the portal includes documentation, testing tools, and API keys.

The standout depth is the combination of API product management and extensibility. Teams can define custom actions in PHP, JavaScript, Python, and Java/Groovy, generate SDKs in multiple languages, apply scoped OAuth2 access, and connect AI agents or MCP integrations. Fusio should appeal to open-source API builders with monetization needs and the technical capacity to operate a self-hosted platform. Teams looking for a managed service, conventional paid tiers, or deployment with less platform ownership should consider a different API management approach.

Your product? Our editors can test Fusio in depth and publish a review, labelled as paid · from $149/mo →

Fusio pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on fusio-project.org

Fusio fact sheet

Free plan	Not verified
Paid from	Free
Deployment model	Self_hosted
Developer portal	Yes
Lifecycle management	Yes
Access policies	Yes
API analytics	Yes
API catalog	Not verified
API product management	Yes
Deployment	Self-hosted, Desktop
Platforms	Web
Support	Live chat, Community, Tickets, Docs
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	12 integrations: MySQL, PostgreSQL, MongoDB, HTTP/REST, Redis, Amazon Web Services … See all →
Pricing	Open source
Website	fusio-project.org
Facts checked	20 Sep 2026

Fusio integrations

Fusio lists 12 integrations on its own site.

MySQL
PostgreSQL
MongoDB
HTTP/REST
Redis
Amazon Web Services
Stripe
PayPal
SOAP
SMTP
AMQP
Elasticsearch

See all Fusio integrations →

Alternatives to Fusio

See all Fusio alternatives →

Also Ranked In

Fusio is ranked in 5 of our directories.

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Featured on iTechGuides

Fusio is listed in our API Management Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update