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Migration guide · API Development

The 4 best free & open-source Postman alternatives

Postman is a widely used, cloud-connected API development platform for designing, testing, documenting, monitoring, and collaborating on APIs. It organizes requests into shared collections and workspaces and layers team collaboration, mock servers, monitors, and AI features on top of a hosted account model, supporting REST, GraphQL, gRPC, and WebSocket protocols.

The cost

Free tier centered on a single user; paid plans are Solo $9, Team $19, and Enterprise $49 per user/month (billed annually), with metered AI credits and usage caps (API calls, monitors) layered on top.

Why people consider an alternative

People commonly look at alternatives for a few practical reasons: cost that grows as a team scales, a 2026 plan restructure that moved team collaboration onto paid tiers, and a cloud- and account-centric model. Others simply prefer a local-first or git-native workflow where API collections live in plain files beside the code they test, or need to work fully offline. For many individual developers Postman's free plan remains a perfectly good fit — the alternatives matter most for teams, privacy-sensitive work, and those who want to own their collections outright.

The verdict — at a glance

AlternativeLicenseSelf-hostPricingSovereignty
Bruno★MITYesFree and open-source core; optional Pro ($6/user/mo) and Ultimate ($11/user/mo) for advanced Git, SSO, and support95
HoppscotchMITYesFree and open-source; free hosted cloud; optional paid cloud team tier; self-host for free90
API DashApache-2.0YesFree and open-source89
InsomniaApache-2.0YesFree with a generous plan; paid tiers for unlimited collaboration, Git Sync, and org/SSO features82
95
Macrostack's top pick

Bruno

A fast, git-native API client that stores collections as plain files.

Every alternative, compared

#1★ TOP PICK

Bruno

A fast, git-native API client that stores collections as plain files.

95
OPEN SOURCEMITSELF-HOSTLOCAL-FIRST

Bruno is an open-source desktop API client that keeps every request as a plain-text .bru file on your filesystem, so collections version-control in git right alongside the code they test. It runs entirely offline with no account required, imports existing Postman collections, and is notably lightweight and quick to start. The free core is fully featured for individuals and small teams; advanced Git, SSO, and org-scale management sit on paid Pro and Ultimate tiers.

Strengths

  • +Fully open-source (MIT)
  • +Collections are plain .bru files you version-control in git
  • +Works offline with no account
  • +Lightweight and fast to start
  • +Imports Postman collections

Trade-offs

  • −Advanced Git, SSO, and org features require paid Pro/Ultimate tiers
  • −Younger ecosystem than Postman
  • −Postman sandbox scripts may need manual rewriting on import
  • −No built-in cloud sync for non-technical teammates
Free and open-source core; optional Pro ($6/user/mo) and Ultimate ($11/user/mo) for advanced Git, SSO, and support
WebsiteSourceDocs
#2

Hoppscotch

An open-source, browser-based API ecosystem you can self-host.

90
OPEN SOURCEMITSELF-HOSTLOCAL-FIRST

Hoppscotch is an open-source API development tool that runs in the browser as an installable PWA with offline support, covering REST, GraphQL, WebSocket, and Server-Sent Events. It is quick to start with nothing to install, and teams that want a shared workspace can self-host the full stack on their own infrastructure. The default hosted experience at hoppscotch.io is cloud-based, with a paid cloud team tier for managed collaboration.

Strengths

  • +Open-source (MIT)
  • +Runs in the browser with an installable, offline-capable PWA
  • +Supports REST, GraphQL, WebSocket, and SSE
  • +Can be self-hosted for a shared team workspace

Trade-offs

  • −Default experience is the hosted cloud at hoppscotch.io
  • −Self-hosting requires running and maintaining Docker services
  • −A paid cloud team tier exists for managed collaboration
  • −Browser-based model differs from a native desktop app
Free and open-source; free hosted cloud; optional paid cloud team tier; self-host for free
WebsiteSourceDocs
#3

API Dash

A fully offline, cross-platform FOSS API client, mobile included.

89
OPEN SOURCEApache-2.0SELF-HOSTLOCAL-FIRST

API Dash is a fully open-source, cross-platform API client built with Flutter that runs completely offline with no account, on desktop and mobile alike. It handles everyday REST and GraphQL workflows, imports collections, and can generate client code. It is the most sovereign option on this list in posture, though it is younger and less battle-tested than the others.

Strengths

  • +Fully open-source (Apache-2.0)
  • +Completely offline and local with no account
  • +Cross-platform including mobile (Flutter)
  • +Actively developed FOSS project

Trade-offs

  • −Younger and smaller community than the others
  • −Fewer advanced and enterprise features
  • −Smaller plugin and integration ecosystem
  • −Less battle-tested for large team workflows
Free and open-source
WebsiteSourceDocs
#4

Insomnia

A mature, multi-protocol API client with a fully local storage mode.

82
OPEN SOURCEApache-2.0SELF-HOSTLOCAL-FIRST

Insomnia is an open-source, cross-platform API client maintained by Kong, covering REST, GraphQL, gRPC, WebSocket, and SSE. Its Local Vault and Scratch Pad options keep collections 100% on your device, and Git Sync stores them in a repository you control, while optional Cloud Sync adds end-to-end-encrypted team collaboration. It is well-established and feature-rich, though most capabilities beyond the local Scratch Pad require a (free) account.

Strengths

  • +Open-source (Apache-2.0), backed by Kong
  • +Local Vault and Scratch Pad allow fully local storage
  • +Git Sync keeps collections in your own repository
  • +Mature and multi-protocol (REST, GraphQL, gRPC, WebSocket)

Trade-offs

  • −Most features beyond the local Scratch Pad require a free account
  • −The product is steered toward Kong's cloud
  • −Premium collaboration and Git Sync sit on paid plans
  • −Some users prefer a fully no-account tool
Free with a generous plan; paid tiers for unlimited collaboration, Git Sync, and org/SSO features
WebsiteSourceDocs

Questions people ask

▸ Can I bring my existing Postman collections across?

Yes. Bruno, Hoppscotch, Insomnia, and API Dash all import Postman collection JSON (Collection v2.1). Most requests, headers, and bodies migrate cleanly; pre-request and test scripts written in Postman's sandbox often need some manual rewriting, and folder ordering can shift on import.

▸ Do I need to run a server to use these?

No for the desktop clients — Bruno, Insomnia, and API Dash run locally with nothing to host. Hoppscotch works in the browser and can optionally be self-hosted with Docker if a team wants a shared, self-run workspace.

▸ Is Postman still the right choice for some teams?

Often, yes. Postman's ecosystem, integrations, monitoring, and collaboration for non-technical stakeholders are still strong, and its free plan covers most solo developers. The alternatives matter most when you want local-first or git-native collections, offline work, no account, or lower cost as a team grows.

Entry last verified 2026-07-05. Licenses and pricing change — spotted something out of date? That's a correction we want.