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Fedify

Free#35 of 37 in API Integration Platforms

Fedify: A focused, open-source toolkit for developers building ActivityPub services. Ranked #35 of 37 in API Integration Platforms by our editors (5.6/10); pricing: Free plan; best for developers building ActivityPub integrations.

5.6/10Editor score
Visit Fedify
Fedify5.6 Visit Fedify

At a glance

  • Editor score
    5.6 / 10
  • Pricing
    Free plan
  • Best for
    Developers building ActivityPub integrations
  • Free plan
    Yes
  • Paid from
    Free
  • Workflow builder
    Code
  • Facts checked
    23 Sep 2026
Fedify screenshot

  • Where it wins

    • Typed Activity Vocabulary objects, WebFinger, and signature support
    • Inbox and outbox listeners with queued, retried delivery
    • Integrations for Express, Elysia, Next.js, Hono, Fresh, and SvelteKit

  • Where it doesn't

    • Focused on ActivityPub rather than general-purpose API integration
    • Workflow building is code-based rather than visual
    • No custom connectors or reusable workflows

Our verdict on Fedify

Fedify is an open-source TypeScript library for building federated server applications with ActivityPub and related standards. It is aimed at developers creating fediverse services who want protocol functionality without writing that infrastructure from scratch. The library supports Deno, Node.js, and Bun, and can be deployed on cloud or self-hosted infrastructure. For developers evaluating API integration platforms, its main distinction is that it is a protocol-specific framework, not a general-purpose tool for connecting unrelated APIs.

Its protocol coverage includes typed Activity Vocabulary objects and extensions, a WebFinger client and server, HTTP Signatures and HTTP Message Signatures, and Object Integrity Proofs and Linked Data Signatures. Inbox listeners handle incoming ActivityPub activities, while outbox listeners cover client-to-server activities. Outgoing activity delivery can be queued and retried. Middleware integrations are available for Express, Elysia, Next.js, Hono, Fresh, and SvelteKit, and CLI scaffolding and development tools support project work. This makes Fedify a fit when the integration requirement centers on federation and ActivityPub behavior; it is less suited to teams seeking broad API connectivity or visual workflow design.

Fedify’s approach is code-first: workflow building is listed as code, and the product does not offer custom connectors or reusable workflows. That trade-off aligns with a library intended to add protocol and federation capabilities to an application, rather than a platform for assembling reusable cross-service automations. Documentation and community are its listed support channels. Developers who need ActivityPub vocabulary, signature handling, inbox and outbox processing, or delivery retries within TypeScript applications should consider it. Teams whose primary need is a general-purpose API integration platform with visual workflows or custom connectors should look elsewhere.

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

Fedify pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on fedify.dev

Fedify fact sheet

Free planYes
Paid fromFree
Workflow builderCode
Self-hosted deploymentYes
Custom connectorsNo
Webhook triggersYes
Included executionsNot verified
Reusable workflowsNo
DeploymentCloud, Self-hosted
SupportCommunity, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations6 integrations: Express, Elysia, Next.js, Hono, Fresh, SvelteKit
PricingFree plan
Websitefedify.dev
Facts checked23 Sep 2026

Fedify integrations

Fedify lists 6 integrations on its own site.

  • Express
  • Elysia
  • Next.js
  • Hono
  • Fresh
  • SvelteKit

Alternatives to Fedify

See all Fedify alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Fedify 5.6/10

Fedify is listed in our API Integration Platforms 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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