Scalar is a API & developer docs tool: Open-source API docs and client.

How much does Scalar cost?

Scalar is Open source; there is no mandatory paid plan.

What are the best alternatives to Scalar?

Community-listed alternatives to Scalar include Postman, Hoppscotch.

Does Scalar have a free trial?

Yes, Scalar offers a 7-day free trial.

What does Scalar integrate with?

Scalar integrates with OpenAPI, GitHub, Next.js, Hono, Fastify and more.

Scalar

Open-source API docs and client

Open source · $150API & developer docs

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Scalar is a aPI & developer docs tool for Developers, offered as open source ($150/mo). Founded in Germany in 2023. Popular alternatives include Postman, Hoppscotch.

About Scalar

Scalar is an open-source platform for API documentation and testing built around the OpenAPI standard. Its best-known product is the Scalar API Reference, a modern, interactive reference page generated from an OpenAPI or Swagger file, with a built-in API client so readers can send real requests from the docs instead of copying curl commands.

The reference can be dropped into a project with a script tag or through integrations for frameworks such as ASP.NET Core, FastAPI, Express, NestJS, Hono and Laravel, which is why it is often used as a modern replacement for Swagger UI. Microsoft's ASP.NET Core documentation lists Scalar as one way to display OpenAPI documents after Swashbuckle was removed from the default template in .NET 9. The Scalar API Client is also available as a standalone app for testing endpoints, similar to Postman. On top of the open-source tools, Scalar offers a hosted platform for publishing API references and guides with custom domains, themes and team features on a paid plan.

Scalar fits developers and startups that want polished API references with minimal setup and no licence cost. It is younger than established players, enterprise developer portal features such as analytics, access control and monetisation are still developing, and the community is smaller. Swagger UI and Redoc are the classic free renderers, Mintlify and ReadMe are full hosted documentation platforms, and Postman is the dominant API client.

Key features of Scalar

Modern API reference
API client
Framework integrations
Hosted docs
Open source
Themes

Pros and cons

Pros

Beautiful UI
Open source
Free
Easy integration

Cons

Younger
Fewer enterprise features
Smaller community
Portal features limited

Scalar pricing

Scalar uses a open source model. A 7-day free trial is available.

Plan	Price	Includes
Free	$0	Up to 3 APIs, 1 editor seat, 1 SDK up to 25 endpoints
Pro	$150 / mo	$125/mo billed yearly; 5 seats, 15 APIs
Business	$600 / mo	$500/mo billed yearly; SSO, 10 seats, 25 APIs
Enterprise	Custom	SLAs and migration services

Source: scalar.com · checked on Oct 20, 2026

How Scalar compares in API & developer docs

Rank by votes: #2 / 16
Starting price: $150
Free alternatives: 4

Scalar ranks #2 of 16 api & developer docs tools by community votes and is priced above most tools in the category.

Common use cases

1Embedding API docs in app
2Open-source API reference
3Testing APIs
4Startup docs

Best for

Developers wanting modern free API docs.

Not ideal for

Enterprise portals.

Integrations

OpenAPI
GitHub
Next.js
Hono
Fastify

Our take

Scalar is the nicest free API reference.

FAQ

What is Scalar?: Scalar is a API & developer docs tool: Open-source API docs and client.
How much does Scalar cost?: Scalar is Open source; there is no mandatory paid plan.
What are the best alternatives to Scalar?: Community-listed alternatives to Scalar include Postman, Hoppscotch.
Does Scalar have a free trial?: Yes, Scalar offers a 7-day free trial.
What does Scalar integrate with?: Scalar integrates with OpenAPI, GitHub, Next.js, Hono, Fastify and more.
Which platforms does Scalar support?: Scalar is available on web.
Who is Scalar for?: Developers wanting modern free API docs.

Alternatives to Scalar

Postman
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Hoppscotch
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Open source · $8DevelopersSmall businesses

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OrcaSMM
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Mintlify
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Apidog
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SwaggerHub
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SmartBear's hosted OpenAPI design, governance and docs platform
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GitBook
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Bump.sh
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Hosted API docs, changelogs and MCP servers from OpenAPI and AsyncAPI
Paid · $50DevelopersSmall businesses

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