Scalar

An open-source API client and OpenAPI docs platform, with a free hosted tier.

Free plan + paidOpen sourceAPI clients

Verified facts: 4 of 4
Alternatives ranked: 5
Approved reviews: 0
Visits sent from here: 0

About Scalar

Scalar is best known for its open-source API reference pages, and it ships a full API client built around OpenAPI. You can drag in an OpenAPI file or URL to generate a collection with requests, authentication and documentation, send requests, switch environments and keep everything in sync with your spec. The client runs as a desktop app for macOS, Windows and Linux, in the browser, and embedded inside Scalar's API reference pages so readers can try endpoints. The client and reference libraries are open source under the MIT licence and widely used in frameworks. Scalar the company sells a hosted platform for API docs, SDK generation and MCP servers: a free plan covers small APIs, and paid Pro and Business plans add editor seats, larger APIs, custom domains and SSO. The trade-offs are that the client is a companion to the docs product rather than a full testing suite, with fewer test and automation features than Postman. It suits API teams who work spec-first with OpenAPI.

Best for: API teams who work spec-first with OpenAPI and want docs and a client together.

What works

Open-source client and API reference
Generates collections straight from OpenAPI
Desktop, web and embedded in docs
Free hosted plan for small APIs

Why people leave

Fewer testing and automation features
Paid docs plans are pricey for small teams
Focus is on the docs platform

Top Scalar alternatives

See all 5

1
Apidog
Design-first API work with testing, mocks and docs in one app.
62.6
2
Insomnia
Desktop client with an OpenAPI design editor.
61.8
3
Hoppscotch
Open-source web client with self-hosting for teams.
59.4
4
Postman
A fuller testing platform with collections, monitors and mocks.
58.3
5
ReadMe
Hosted API documentation with interactive try-it consoles.
47.8

Why people left Scalar

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Scalar: common questions

Is Scalar free?

Scalar has a free plan and paid plans. Free plan: Yes, up to 25 endpoints (checked on Scalar's own site).

Is Scalar open source?

Yes. The source code is on GitHub at scalar/scalar.

What platforms does Scalar run on?

Scalar is available for Web, macOS, Windows and Linux.

What are the best alternatives to Scalar?

The highest-ranked Scalar alternatives right now are Apidog, Insomnia and Hoppscotch. See the full ranked list for pricing, platforms and verified facts.

See all 5 Scalar alternatives

Scalar facts

4 of 4 verified

License: MIT; Checked Oct 25, 2026github.com(opens source in a new tab); “License: MIT (MIT License).”
Platforms: macOS, Windows, Linux, browser; Checked Oct 25, 2026scalar.com(opens source in a new tab); “Download the app for macOS, Windows, or Linux, or jump straight into the browser version .”
OpenAPI import: Yes; Checked Oct 25, 2026scalar.com(opens source in a new tab); “Import your OpenAPI document Drag and drop an OpenAPI file or import from a URL to generate a complete collection with requests, authentication, and documentation.”
Free plan: Yes, up to 25 endpoints; Checked Oct 25, 2026scalar.com(opens source in a new tab); “Plan Price Summary Action Free $0 Beautiful API docs, landing pages, and 1 SDK for APIs up to 25 endpoints.”