Postman vs Insomnia vs Hoppscotch: Which API Client Is Best in 2024?
Open your browser’s developer tools on any given workday and you’ll find an API request waiting to be sent. Behind every login form, payment flow, and mobile app refresh sits a REST or GraphQL endpoint that someone has to test. For years, that job meant one tool: Postman. But the API client market has fractured in interesting ways, and in 2024 developers have three serious contenders worth evaluating—Postman, Insomnia, and Hoppscotch.
The stakes are higher than they look. Postman reports more than 30 million registered users and over 500,000 organizations, making it the de facto standard. Insomnia, acquired by Kong in 2019, carved out a niche among developers who found Postman too heavy. Hoppscotch, an open-source project that started as a side project in 2019, has grown into a lightweight browser-based alternative with a passionate community. Each takes a fundamentally different approach to the same problem. Here’s how they compare.
The Contenders at a Glance
| Feature | Postman | Insomnia | Hoppscotch |
|---|---|---|---|
| Type | Desktop + web | Desktop + web | Browser-first, PWA |
| Free tier | Generous but cloud-synced | Limited (cloud sync requires paid plan) | Fully open source, free |
| Pricing (paid) | From $14/user/month (billed annually) | From $5/user/month | From $5/user/month (cloud) |
| Protocol support | REST, GraphQL, gRPC, WebSocket, SOAP | REST, GraphQL, gRPC, WebSocket | REST, GraphQL, WebSocket, SSE, MQTT |
| Open source | No | No (core is source-available) | Yes (MIT license) |
| Best for | Teams and enterprise workflows | Individual developers and API design | Quick tests and privacy-conscious users |
That table hides as much as it reveals. The real differences show up in daily use.
Postman: The Everything Platform
Postman’s strength is breadth. It began as a Chrome extension for firing off HTTP requests and evolved into a full API lifecycle platform: collections, environments, mock servers, automated test suites, documentation generation, and a monitoring service that pings your endpoints on a schedule. If your team needs a shared workspace where a QA engineer, a backend developer, and a technical writer can all work from the same collection, Postman does that better than anyone.
The collection runner and Newman CLI remain genuinely useful for CI pipelines. You can write JavaScript assertions against responses, chain requests using variables, and fail a build when an endpoint returns the wrong status code. For teams already invested in Postman’s ecosystem, the switching cost is real.
The complaints are equally real. Postman has grown heavy—the desktop app can consume several hundred megabytes of RAM with a large workspace open. The 2023 update that pushed users toward cloud-synced accounts drew significant backlash from developers who preferred local-only storage, and Postman later walked back some of those changes. The free tier is generous for individuals but nudges teams toward paid plans quickly: the Professional plan starts at $14 per user per month when billed annually, and the Enterprise tier is custom-priced. For a ten-person team, that’s a meaningful line item.
Postman also isn’t open source, which matters to organizations with strict software supply chain requirements.
Insomnia: Focused, Fast, and a Little Controversial
Insomnia’s pitch is simplicity without sacrificing power. The interface feels lighter than Postman’s, launching faster and staying out of your way. It handles REST, GraphQL, gRPC, and WebSockets, and its GraphQL support is arguably the best of the three—schema introspection, autocomplete, and query linting are built in rather than bolted on.
Kong’s ownership shaped Insomnia’s direction. The tool now integrates with Kong’s API gateway tooling and emphasizes API design workflows: you can write an OpenAPI spec inside Insomnia and generate requests from it. For developers who think spec-first, that’s appealing.
Insomnia’s pricing is friendlier than Postman’s on paper—paid plans start at $5 per user per month—but there’s a catch. The free tier limits you to a small number of projects and collections, and cloud sync, which most teams want, requires a paid plan. Insomnia also made headlines in 2023 when it moved to a proprietary license and required account sign-in for some features, prompting a community fork called Insomnia REST (and later, broader frustration). The core app remains source-available, but it is not open source in the OSI sense.
For a solo developer who wants a fast, clean client with excellent GraphQL support and doesn’t mind paying a little, Insomnia is a strong pick. For open-source purists, it’s a harder sell.
Hoppscotch: The Lightweight Open-Source Challenger
Hoppscotch takes the opposite approach: start in the browser, stay fast, and give everything away. It began as a web app you could open at hoppscotch.io without installing anything, and it still works that way. As a progressive web app, it can run offline and be installed like a native app. The interface loads in under a second on a decent connection—a stark contrast to waiting for a desktop client to boot.
The feature set has matured considerably. Hoppscotch supports REST, GraphQL, WebSocket, Server-Sent Events, and MQTT, plus environment variables, collections, and pre-request scripts. The self-hosted version is MIT-licensed, meaning teams can run it entirely on their own infrastructure with no data leaving their network—a genuine differentiator for security-conscious organizations and developers working with sensitive APIs.
The trade-offs are real. Hoppscotch’s automated testing and CI integration are less mature than Postman’s. Its collaboration features, while improving, don’t match the polish of a shared Postman workspace. The desktop app exists but the browser-first design means you’re sometimes at the mercy of browser limitations. And while the open-source core is free, the cloud-hosted team features start at $5 per user per month, similar to Insomnia.
For quick endpoint testing, learning HTTP, or working in environments where installing software is restricted, Hoppscotch is hard to beat. It’s also the obvious choice for anyone who wants to inspect exactly what the tool is doing with their data.
How to Choose
The decision comes down to what you optimize for.
Choose Postman if you work on a team that needs shared collections, automated testing in CI, and documentation generation in one place, and your organization is willing to pay for it. The ecosystem and hiring familiarity are real advantages—most developers already know how to use it.
Choose Insomnia if you’re an individual developer or small team that values speed and clean GraphQL tooling, and you’re comfortable with Kong’s commercial direction. The lower price point helps.
Choose Hoppscotch if open source, self-hosting, and a lightweight footprint matter more than enterprise collaboration features. It’s also the best entry point for developers who just need to send a request without installing anything.
One practical note: none of these tools lock you in completely. Postman can import OpenAPI specs and cURL commands, Insomnia exports to multiple formats, and Hoppscotch imports Postman collections. Trying all three costs nothing but an afternoon.
The Bottom Line
There’s no universal winner in 2024, and that’s a healthy sign for the market. Postman remains the safest choice for teams that need a full platform and can absorb the cost. Insomnia is the focused alternative for developers who prioritize speed and GraphQL. Hoppscotch is the open-source option that has grown from a novelty into a legitimate daily driver.
The right question isn’t which tool is “best”—it’s which constraints matter most to you: budget, data privacy, collaboration needs, or raw speed. Answer that first, and the choice becomes obvious.