Postman vs Insomnia vs Hoppscotch: Best API Client for Developers in 2025
In 2024, Postman’s public API network passed 40 million registered developers, Insomnia was acquired by Kong and folded into a broader API lifecycle platform, and Hoppscotch quietly crossed 60,000 GitHub stars with a browser-first model that needs no install. Three very different bets on what an API client should be.
The choice matters more than it used to. An API client now sits at the center of your debugging loop, your test suite, your team’s documentation, and sometimes your CI pipeline. Picking one is a multi-year commitment to a workflow. Here’s how the three stack up in 2025, with the trade-offs spelled out rather than ranked into a single “winner.”
The three tools at a glance
- Postman — The incumbent. Electron desktop app plus a full web client, with collections, environments, mock servers, monitors, a public API network, and an AI assistant. Free tier is generous for individuals; paid plans start around $14 per user per month (billed annually) and climb steeply for teams.
- Insomnia — Now branded “Insomnia by Kong.” A leaner desktop client with strong support for REST, GraphQL, gRPC, WebSockets, and SSE. Free tier covers core use; paid plans begin around $12 per user per month, with enterprise tiers tied to Kong’s platform.
- Hoppscotch — Open-source (MIT-licensed core), runs in the browser or as a desktop app, and can be self-hosted. Supports REST, GraphQL, WebSocket, SSE, MQTT, and Socket.IO. Free for individuals; cloud team plans are modest, and self-hosting is free if you bring the infrastructure.
Postman: the ecosystem play
Postman’s advantage is breadth. If you need to design an API spec, generate a collection from it, spin up a mock server, run a monitor on a schedule, and publish docs to a public workspace, Postman does all of it without leaving the app. The scripting layer (pre-request and test scripts in JavaScript) is mature, and the newman CLI lets you run collections in CI.
The costs are real. The desktop app is heavy — Electron-based, and users regularly report it consuming several hundred megabytes of RAM with a large workspace open. The 2023 controversy over the scrapping of the Scratch Pad (later partially walked back) left a lasting trust question about how aggressively the company pushes users toward cloud accounts. And pricing scales in a way that surprises teams: what’s cheap for three developers gets uncomfortable at thirty.
Best for: teams that want one tool for the full API lifecycle and are willing to pay for it; anyone who relies on the public API network for discovery.
Insomnia: focus over breadth
Insomnia’s pitch is that it does the core job — sending requests, organizing them into collections, managing environments — with less overhead. The interface is cleaner, the app feels lighter, and GraphQL support in particular is well-regarded, with schema introspection and autocomplete built in. The plugin system (though less active than it once was) lets you extend request handling.
The Kong acquisition changed the calculus. Insomnia is increasingly positioned as an on-ramp to Kong’s API gateway and governance products. For teams already in the Kong ecosystem, that’s a feature. For everyone else, it means the roadmap is steered by priorities that may not match yours. The free tier also now requires an account for cloud sync features, and some users have chafed at the login prompts.
Best for: individual developers and small teams who want a fast, focused desktop client, especially with GraphQL-heavy work.
Hoppscotch: open source and browser-first
Hoppscotch started as a lightweight web alternative and has grown into a genuine contender. Because the core is open source and self-hostable, it appeals to teams with data-residency requirements or a principled preference for avoiding vendor lock-in. The browser-first model means zero install friction — paste a URL and send a request in seconds.
The trade-offs are maturity and depth. Collection runners, CI integration, and enterprise features like SSO are less developed than Postman’s. The self-hosted path requires you to run and maintain the stack, which is real work. And while the community is active, the ecosystem of tutorials, integrations, and third-party tooling is thinner. For straightforward REST and GraphQL testing, though, it covers the vast majority of daily needs — and the price is hard to argue with.
Best for: open-source-minded teams, cost-sensitive organizations, and anyone who wants self-hosting or browser-based access without an install.
Feature comparison
| Capability | Postman | Insomnia | Hoppscotch |
|---|---|---|---|
| REST / GraphQL / gRPC | Yes | Yes | Yes (gRPC in progress) |
| WebSocket / SSE | Yes | Yes | Yes |
| CLI for CI | Newman (mature) | inso CLI | Limited |
| Mock servers | Yes | Limited | Limited |
| Self-hosting | Enterprise only | No | Yes (free) |
| Open source core | No | No | Yes (MIT) |
| Free tier generosity | High | High | Very high |
| Desktop app weight | Heavy | Moderate | Light (web) / moderate |
Treat the table as directional — all three ship updates frequently, and details shift quarter to quarter.
Performance and resource use
If you work on a laptop with 16 GB of RAM and a dozen other apps open, this matters. Postman is the heaviest of the three; its feature set comes with a footprint. Insomnia sits in the middle. Hoppscotch in the browser is the lightest, though a browser tab with many open requests has its own costs, and the desktop build is a reasonable middle ground. None of these differences are dealbreakers, but “my API client is eating my battery” is a complaint you’ll hear about Postman far more than the others.
Pricing reality check
For a solo developer, all three are effectively free. The divergence starts at small-team scale. Postman’s per-seat pricing adds up quickly once you include everyone who touches the API — including QA and support staff who may only need read access. Insomnia’s pricing is comparable but increasingly bundled with Kong’s platform. Hoppscotch’s self-hosted option is the outlier: free software, your infrastructure, your maintenance burden. Run the math for your actual headcount before committing; the sticker price is only part of the story.
Security and data handling
All three store request history and environment variables, which can include API keys and tokens. Postman and Insomnia sync to their clouds by default (configurable). Hoppscotch’s browser model means requests originate from your browser, which has implications for CORS and for where credentials live. For regulated industries, Hoppscotch’s self-hosting is the clearest path to keeping data in-house; Postman offers enterprise self-hosting but at enterprise prices.
The verdict
There’s no universal winner, and anyone who tells you otherwise is selling something.
- Choose Postman if your team needs the full lifecycle — design, mock, test, monitor, document — in one place and the budget supports it.
- Choose Insomnia if you want a fast, focused desktop client and either work heavily in GraphQL or already live in the Kong ecosystem.
- Choose Hoppscotch if open source, self-hosting, or zero-install convenience are priorities, and your needs center on everyday request testing rather than enterprise governance.
The pragmatic move for many teams is to standardize on one for shared collections and CI, while letting individuals use whichever client they prefer for ad-hoc debugging. Collections are portable enough that this doesn’t create the chaos it once did.
The takeaway: in 2025 the API client market has segmented by philosophy rather than feature checklist. Postman sells an ecosystem, Insomnia sells focus, and Hoppscotch sells openness. Match the tool to how your team actually works — and revisit the decision when your headcount or compliance requirements change, because that’s when the pricing and data-handling differences stop being abstract.