Postman vs Insomnia vs Hoppscotch: Which API Client Is Best in 2025?

Three API clients, three very different trajectories. Postman now bundles an AI agent and a cloud platform into what used to be a simple request builder. Insomnia was acquired by Kong in 2023 and has spent the time since repositioning itself around a Git-friendly, plugin-driven workflow. Hoppscotch, the open-source underdog, has quietly become the default choice for developers who want a browser tab instead of a desktop install.

All three can send a GET request and show you JSON. The differences show up in week two, when your team has 200 endpoints, a shared environment file, and a CI pipeline that needs to run tests on every pull request. Here’s how they compare on the things that actually matter.

The Contenders at a Glance

Postman is the incumbent. It’s a full API platform: client, mock servers, automated test runner, documentation hosting, and monitoring. The free tier covers basic use; paid plans start at $14 per user per month (billed annually) for the Basic tier and climb from there.

Insomnia is the design-focused client. Kong’s ownership has pushed it toward spec-first workflows (OpenAPI, GraphQL, gRPC) and a plugin ecosystem. A free tier exists; the Individual plan runs $5 per month, and team plans start higher.

Hoppscotch is the lightweight, open-source option. It runs in the browser, installs as a PWA, and offers a self-hostable version. The cloud free tier is generous; paid plans start around $5 per user per month for teams that need collaboration features.

Performance and Resource Footprint

Postman is an Electron app, and it feels like one. On a 16GB machine with a browser, an IDE, and Slack open, Postman can easily consume 800MB to 1.5GB of RAM. Cold starts take several seconds. For developers who keep the client open all day, that adds up.

Insomnia is also Electron-based but noticeably leaner, typically sitting in the 300–600MB range. It launches faster and stays out of the way.

Hoppscotch wins on footprint by default: it’s a web app. If you use the browser version, it costs whatever the tab costs—usually under 100MB. The desktop app (also Electron) exists for people who need it, but many users never install it.

The trade-off is real, though. Hoppscotch’s browser version runs into CORS restrictions unless you install a browser extension or use the desktop app. That’s a friction point for anyone testing internal APIs without proper CORS headers.

Collaboration and Team Features

This is where Postman justifies its price for many organizations. Workspaces, shared collections, role-based access, change history, and comments all work out of the box. The Postman API Network and public workspace model have made it a de facto standard for API documentation sharing. If your company already has 50 collections in Postman, switching costs are steep.

Insomnia’s collaboration story improved under Kong but still lags. Shared workspaces and cloud sync exist on paid plans, but the experience is less polished than Postman’s. The bigger draw is Git sync: Insomnia can store collections as files in a repo, which fits teams that treat API definitions like code.

Hoppscotch offers team workspaces and shared collections on paid tiers, plus self-hosting for organizations that can’t send API traffic through a third party. For a small team or an open-source project, the free collaboration features are surprisingly usable.

Testing and Automation

Postman’s test runner is the most mature. You write tests in JavaScript with the pm API, chain requests, use dynamic variables, and run collections via Newman (the CLI) in CI. The newer Postman CLI replaces Newman and adds reporting. For teams doing contract testing or smoke tests against staging, this is a complete solution.

Insomnia supports unit testing through its plugin system and can run request chains, but automated collection runs in CI are less straightforward. Kong has been investing here, and the CLI story is improving, but it’s not yet at Postman’s level.

Hoppscotch added test scripts and a CLI for CI runs, and for straightforward assertions (“status is 200,” “body contains this field”) it works fine. Complex multi-step test suites are where it starts to strain.

Protocol Support and Developer Experience

All three handle REST, GraphQL, and WebSocket requests. The differences:

  • Postman supports gRPC, MQTT, and a long list of auth types. Its AI features (request generation, test writing) are genuinely useful but tied to paid tiers and raise obvious questions about sending API details to a vendor.
  • Insomnia has strong GraphQL tooling (schema introspection, autocomplete) and solid gRPC support. Its plugin system lets you extend auth flows and template tags. The UI is cleaner than Postman’s, which has grown cluttered as features accumulated.
  • Hoppscotch covers REST, GraphQL, WebSocket, SSE, and MQTT. The interface is fast and minimal—arguably the best pure request-sending experience of the three. It lacks some advanced auth helpers, but for most day-to-day work that doesn’t matter.

One practical note: Hoppscotch’s import feature handles Postman collections and OpenAPI specs well, so migrating a personal workflow takes minutes, not days.

Pricing Reality Check

Postman’s free tier is fine for individuals but restricts collaboration (limited shared requests, capped mock server calls). Once a team needs shared workspaces and higher limits, costs scale per seat—a 20-person team on the Basic plan pays roughly $3,360 per year.

Insomnia’s Individual plan at $5/month is cheap; team pricing is competitive with Postman but the feature set is narrower.

Hoppscotch’s free tier covers most individual needs, and self-hosting the open-source version costs only infrastructure. For budget-conscious teams, it’s the obvious starting point.

The Verdict

There’s no single winner, because the right choice depends on what you’re optimizing for.

Choose Postman if you need enterprise collaboration, mature CI test automation, and documentation hosting in one place—and your organization will pay for it.

Choose Insomnia if you want a cleaner, lighter client with strong GraphQL support and a Git-centric workflow, and you don’t need Postman’s full platform.

Choose Hoppscotch if speed, low resource use, and open-source flexibility matter more than deep automation—or if you want to self-host and keep API traffic in-house.

A reasonable default for 2025: start with Hoppscotch for daily request work, keep Postman around if your team already depends on its test runner, and evaluate Insomnia if you’re designing APIs spec-first. The tools are converging on features; what separates them now is weight, price, and how much platform you’re willing to accept along with your request builder.