Side by side

RDoc vs Scalar

RDoc

6.1#18 in documentation generatorsFree plan

Free planLinuxSelf-hosted

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Scalar

8.4#1 in documentation generatorsFrom $150 a month

Free planWebAPILinuxmacOS

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RDoc plans

RDocFree

Scalar plans

FreeFree
Pro$150 a month
Business$600 a month
EnterprisePriced on request

Pick RDoc if…

RDoc suits Ruby project maintainers who need generated API references, command-line documentation, and local previews on Linux or self-hosted systems. It also fits teams documenting Ruby, C, or RBS sources in automation workflows.

Pick Scalar if…

Scalar suits developers and teams that work with OpenAPI-based documentation, SDKs, or API registries. Its hosted and self-hosted options may suit teams with different deployment preferences.

Charts they share

Documentation Generators