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Restlet Framework

Free#33 of 33 in API Development Tools

Restlet Framework: A self-hosted Java framework for REST APIs, with routing, server features, and extensions. Ranked #33 of 33 in API Development Tools by our editors (5.8/10); pricing: Free plan; best for java developers building REST APIs with a framework.

5.8/10Editor score
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Restlet Framework5.8 Visit Restlet

At a glance

  • Editor score
    5.8 / 10
  • Pricing
    Free plan
  • Best for
    Java developers building REST APIs with a framework
  • Free plan
    Yes
  • Paid from
    Free
  • API design
    No
  • Facts checked
    25 Sep 2026

  • Where it wins

    • Supports client- and server-side REST API development.
    • Built-in routing, web server features, and authentication support.
    • Extensions connect with tools such as Spring, Jetty, Jackson, and GSON.

  • Where it doesn't

    • Requires Java development and self-hosted deployment.
    • Does not include API design, testing, or mock-server features.
    • Its focus is framework-based API development rather than a broader API lifecycle.

Our verdict on Restlet Framework

For Java developers building REST APIs within an application, Restlet Framework provides a framework for both client- and server-side development. It combines URI-template-based routing with resource handling, authentication and authorization, and representation conversion. Its documented range also includes websites and web clients, so it can support more than API endpoints while remaining centered on Java development. The published documentation identifies itself as a guide for version 2.3, a relevant consideration for teams evaluating fit against their maintenance needs.

The framework’s server capabilities are a notable part of its scope: content negotiation, compression, logging, and conditional requests are built in. Connectors cover HTTP, files, classloaders, and in-JVM resources. Conversion integrations let Java objects map to and from representations, while the documented standards and formats include HTTP, XML, JSON, OData, RDF, and Atom. This makes Restlet a candidate for teams that want routing and HTTP handling in a framework, rather than separate API design, testing, or mock-server tooling.

Restlet is open source, with a free plan, and is deployed self-hosted. Its extension model includes integrations such as Servlet, Spring, Jetty, JAXB, Velocity, FreeMarker, Thymeleaf, Jackson, SLF4J, and GSON; support channels include documentation and community. These options suit Java teams that can select and operate their own runtime stack. It is less suitable for buyers seeking a hosted service or a wider API lifecycle suite, and teams should weigh the versioned documentation when assessing long-term fit. Choose it for framework-level REST work in Java; look elsewhere if API design and testing tools are central requirements.

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

Restlet Framework pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on restlet.github.io

Restlet Framework fact sheet

Free planYes
Paid fromFree
API designNo
API testingNo
Mock serversNo
API spec formatsWADL
DeploymentSelf_hosted
Version controlNo
DeploymentSelf-hosted
SupportCommunity, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations10 integrations: Servlet, Spring, Jetty, JAXB, Velocity, FreeMarker …
PricingFree plan
Websiterestlet.github.io
Facts checked25 Sep 2026

Restlet Framework integrations

Restlet Framework lists 10 integrations on its own site.

  • Servlet
  • Spring
  • Jetty
  • JAXB
  • Velocity
  • FreeMarker
  • Thymeleaf
  • Jackson
  • SLF4J
  • GSON

Alternatives to Restlet Framework

See all Restlet Framework alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Restlet Framework 5.8/10

Restlet Framework is listed in our API Development Tools 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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