Ruby API Builder

Open-source Ruby projects categorized as API Builder
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Top 23 Ruby API Builder Projects

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  1. Grape

    An opinionated framework for creating REST-like APIs in Ruby.

  2. Stream

    Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.

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  3. graphql

    Ruby implementation of GraphQL

    Project mention: Ruby Solved My Problem | news.ycombinator.com | 2025-11-07

    > actually, in some cases, it outperforms C -> https://railsatscale.com/2023-08-29-ruby-outperforms-c/

    Bit of a clarification after reading the article - that article demonstrates a pure-Ruby implementation [0] outperforming a C extension [1], which is not what I had originally expected when first clicking on the link.

    [0]: https://github.com/tenderlove/tinygql

    [1]: https://github.com/rmosolgo/graphql-ruby/tree/master/graphql...

  4. ActiveModel::Serializers

    ActiveModel::Serializer implementation and Rails hooks

    Project mention: [Rails] How We Reduced API Response Rendering Time by 30% | dev.to | 2025-02-01

    Other candidates included the following gems such as alba, active_model_serializers, and jsonapi-serializer. Considering team-wide adoption and maintenance, we preferred gems with syntax similar to Jbuilder if possible.

  5. Rails::API

    Rails for API only applications

  6. Fast JSON API

    No Longer Maintained - A lightning fast JSON:API serializer for Ruby Objects.

  7. jbuilder

    Jbuilder: generate JSON objects with a Builder-style DSL

    Project mention: [Rails] How We Reduced API Response Rendering Time by 30% | dev.to | 2025-02-01

    Jbuilder is a domain-specific language (DSL) integrated into Ruby on Rails for generating JSON responses. It allows you to intuitively build JSON responses as if you’re writing a view. However, performance issues can arise when handling large amounts of data.

  8. rabl

    General ruby templating with json, bson, xml, plist and msgpack support

  9. InfluxDB

    InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

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  10. JSONAPI::Resources

    A resource-focused Rails library for developing JSON:API compliant servers.

  11. Her

    Her is an ORM (Object Relational Mapper) that maps REST resources to Ruby objects. It is designed to build applications that are powered by a RESTful API instead of a database.

  12. Roar

    Parse and render REST API documents using representers.

  13. jsonapi-serializer

    A fast JSON:API serializer for Ruby (fork of Netflix/fast_jsonapi)

    Project mention: [Rails] How We Reduced API Response Rendering Time by 30% | dev.to | 2025-02-01

    Other candidates included the following gems such as alba, active_model_serializers, and jsonapi-serializer. Considering team-wide adoption and maintenance, we preferred gems with syntax similar to Jbuilder if possible.

  14. Jb

    A simple and fast JSON API template engine for Ruby on Rails

    Project mention: [Rails] How We Reduced API Response Rendering Time by 30% | dev.to | 2025-02-01

    Next, I investigated template engines. The first one I explored was a gem called jb, maintained by Ruby/Rails committer Matsuda-san. I replaced Jbuilder with it but didn’t see significant improvements.

  15. Blueprinter

    Simple, Fast, and Declarative Serialization Library for Ruby

  16. Pliny

    An opinionated toolkit for writing excellent APIs in Ruby.

  17. Version Cake

    :cake: Version Cake is an unobtrusive way to version APIs in your Rails or Rack apps

  18. Blanket

    A dead simple API wrapper (by inf0rmer)

  19. Praxis

    Praxis is a framework that focuses on both the design and implementation aspects of creating APIs.

  20. jsonapi-rb

    Efficiently produce and consume JSON API documents.

  21. api_struct

    API wrapper builder with response serialization

  22. Crêpe

    🥞 The thin API stack. (by crepe)

  23. Pragma

    An expressive, opinionated ecosystem for building beautiful RESTful APIs with Ruby. (by pragmarb)

  24. Jsonite

    A tiny, HAL-compliant JSON presenter for your Ruby APIs.

  25. ib_ruby_proxy

    Invoke IB api from ruby

  26. SaaSHub

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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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    www.saashub.com | 23 Dec 2025
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Index

What are some of the best open-source API Builder projects in Ruby? This list will help you:

# Project Stars
1 Grape 9,982
2 graphql 5,428
3 ActiveModel::Serializers 5,345
4 Rails::API 5,147
5 Fast JSON API 5,050
6 jbuilder 4,408
7 rabl 3,640
8 JSONAPI::Resources 2,324
9 Her 2,090
10 Roar 1,847
11 jsonapi-serializer 1,425
12 Jb 1,314
13 Blueprinter 1,257
14 Pliny 802
15 Version Cake 656
16 Blanket 459
17 Praxis 302
18 jsonapi-rb 243
19 api_struct 233
20 Crêpe 128
21 Pragma 90
22 Jsonite 28
23 ib_ruby_proxy 17

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