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Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. vs Insomnia

Insomnia is an open-source client for calling APIs you own, whereas Fusion provides ready-made micro-services.
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.The Notion Like API ClientInsomniaOpen-source API client for REST, GraphQL and gRPC

Which to pick

Pick Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. if you want…

  • Unified API catalog for diverse jobs
  • Integrations with cURL, Node or Python (on Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.'s list, not Insomnia's)

Pick Insomnia if you want…

  • Collaborative AI-native API testing
  • Self-hosted API testing
  • Open-source code (Kong/insomnia on GitHub, Apache-2.0 license)
  • Integrations with Kong Konnect, OIDC or SAML (on Insomnia's list, not Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.'s)

Side by side

What it is
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:Fusion is an API catalog offering 1,500+ endpoints for file conversion, data extraction, validation and more, with a single token.
Insomnia:Insomnia is an open-source API client for designing, testing, debugging and mocking REST, GraphQL, gRPC, SOAP and WebSocket APIs.
Best for
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:Unified API catalog for diverse jobs
Insomnia:Collaborative AI-native API testing
Who it’s for
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:Developers and teams needing ready-made micro-services without building them.
Insomnia:API developers, security-focused teams, and organizations needing collaborative API workflows.
Pricing
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:Freemium
Insomnia:Freemium
Plans
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:Starter Free · Pro $16 per month · Pro+ $42 per month
Insomnia:—
Open source
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:—
Insomnia:Yes, 40,038 GitHub stars
Works with
Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.:cURL, Node, Python, Go, Java
Insomnia:Kong Konnect, OIDC, SAML, SCIM, Inso CLI

Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. features

  • Single token access. One apy-token works on every endpoint in the catalog.
  • Free tier. Free plan includes 3,000 atoms, 5 req/sec and one API key, no card required.
  • Try-it panel. Test any API in the browser with live responses before coding.
  • Self-hosted options. Data can be processed in EU or US regions with GDPR, SOC 2, ISO 27001 compliance.
  • MCP server. Expose selected endpoints as a single micro-service for AI agents.
  • Extensive catalog. 400+ services across file conversion, validation, SEO, finance and more.

Insomnia features

  • Design-first API editor. Create and preview OpenAPI specs in real time with live linting.
  • Native API mocking. Generate dynamic mock responses from collections, specs or plain language.
  • Automated testing at scale. Run unlimited collection tests with pre/post scripts and CI/CD integration via Inso CLI.
  • Kong Konnect integration. Sync API catalog directly with Kong Konnect for up-to-date endpoint discovery.
  • Collaboration & RBAC. Real-time project sharing, role-based access controls and unlimited collaborators per project.
  • Flexible storage options. Store data locally, in Git, in the cloud, or hybrid with end-to-end encryption.
  • Enterprise identity & security. SSO via OIDC/SAML, SCIM provisioning, SOC 2 compliance and enterprise SLAs.
  • MCP client support. Test and debug MCP servers with AI-powered workflows.

Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. vs Insomnia FAQ

Is Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. or Insomnia free?+

Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. has a free plan (Starter); paid plans start at $16/month (Pro). Insomnia has a free plan and paid plans.

Is Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. or Insomnia open source?+

Insomnia is open source (Kong/insomnia on GitHub, Apache-2.0 license). DevHunt has no public source repository on record for Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs..

Do Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. and Insomnia integrate with the same tools?+

Their integration lists don't overlap: Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. lists cURL, Node, Python, Go and 1 more; Insomnia lists Kong Konnect, OIDC, SAML, SCIM and 1 more.

On DevHunt

Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs.

14 upvotes · Launched on DevHunt on Jul 29, 2025

Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. on DevHunt →Fusion: A modern API Client: Build, Test, Document and Collaborate on APIs. alternatives

Insomnia

Listed by DevHunt

Insomnia on DevHunt →Insomnia alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.