Sapper VS openapi-generator

Compare Sapper vs openapi-generator and see what are their differences.


The next small thing in web development, powered by Svelte (by sveltejs)


OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3) (by OpenAPITools)
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Sapper openapi-generator
26 62
7,157 9,921
0.2% 4.0%
7.1 9.9
17 days ago 6 days ago
TypeScript Java
MIT License Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of Sapper. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-10-07.
  • How I Redesigned My Website With SvelteKit | 2021-10-07
    So after using Sapper for some time, I decided to move my website to SvelteKit. I remember saying that I would not move to SvelteKit till they hit version 1 but the framework looks too promising. It had features which I needed and those features weren't in Sapper.
  • Journey to Svelte (through Gatsby) | 2021-09-22
    By that time, we had some troubles with virtual dom itself in our custom rich text editor that we based on slate - it was getting a bit laggy when creating huge financial documents (they usually have enormous tables and a lot of infographics) -so we were already thinking about other options and that’s where svelte comes into the light - especially sapper which was de facto default framework to be used with svelte at that time (SvelteKit wasn’t even announced).
  • Deploying Sapper application to | 2021-09-03
    Sapper is a framework for building web applications of all sizes, with a beautiful development experience and flexible filesystem-based routing. It is the predecessor of Sveltekit.
  • Conheça o que são as siglas CSR, SSR e SSG | 2021-08-27
    Sapper - ecossistema Svelte
  • I'm building a web app that aims to combine features from CodePen, Reddit, Medium,, and Stack Overflow | 2021-07-10
    Lol I won’t, and to answer your question, it’s built using sapper:
  • Sveltekit - to use or not to use? | 2021-07-09
    I maintain a Svelte Starter Kit and all I had to do between several updates is change the layout file names, simplify the hooks, and convert the config file extensions. If you're learning Svelte in 2021, you shouldn't miss learning it, as it's "the missing CLI" and the svelte team's favoured project structure, to build full-stack server rendered and static sites, with File/Folder based routing, focus on server-less with adapters, API routes, and good baked-in conventions and constructs to support common web app needs. It's a successor to Sapper which served the aforementioned needs, with exception of adapters, which is special/unique(with no officially provided parallels in Next.js/Nuxt ecosystems yet) way to make vendor-agnostic, server-less first deployment concern a seamlessly integrated part of the framework.
  • Javascript's import vs require? | 2021-05-28
    Since Node v12, ES modules has been enabled by default. Hence my use of '.mjs' to run my file including a node module. Another way to resolve this issue is to use import with Node.js, you have to edit the package.json to 'type':'module'. However, using this caused my Sapper server to crash since it wasn't supported, as the rollup file outputs the format to commonjs Explained in (this GitHub issue).
  • planning to learn svelte for front-end, need advice | 2021-05-23
    I am not sure whether or not they help you, but both and are open source. both of those projects are built on sapper, not svelte-kit, but a quick look at should be enough to see what changed. (both of those make heavy use of markdown files so I don't know how helpful they are, also if you need help translating something from sapper to svelte-kit just reply and I'll probably be able to help)
  • Difference between SSR, SSG, CSR and SPA | 2021-04-11
    SSR (Server Side Rendering): the process of receiving a request from the client, e.g: a user goes to to load the homepage, and returning a rendered version of the webpage with all the needed info and data to load it as fast as possible. Examples of this are [NextJS](, [NuxtJS](, [Angular Universal](, [SvelteKit]( (currently in Beta) and [Sapper]( (currently going deprecated);
  • Getting my SvelteKit website on Netlify | 2021-04-10
    But wait a minute? The local version is not working anymore? Apparently, Vite, the local build tool, did not like it when I moved the packages. After trying several things, I gave up. As SvelteKit is still in beta, community resources are scarce. I did found a few Sapper examples, the predecessor of SvelteKit, using the adapter-static. Success! Well... kind of.


Posts with mentions or reviews of openapi-generator. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-10-09.
  • Using swaggo to generate typescript types | 2021-10-10
    Hi, we use swaggo to generate the documentation and then to generate a typescript-axios client-stub. The plan for us is to publish this client stub to a private npm registry for our frontend. Hope it helps.
  • Mmmm, sparkling JSON
    A huge overview here
  • Looking for help with Azure Autorest | 2021-10-04
    You may have better luck with go-swagger or OpenAPI Generator to generate Go code.
  • I started a new job using Angular and I miss React | 2021-10-02
  • A question regarding PHP, WSDL and Angular implementation | 2021-09-30
    Then whoever uses your API can use this to generate it into the language of their choice -
  • Apex Structure for working with API
    Second, are these APIs implemented with a standard like openapi? If so, you can generate the DTO/Data transfer objects from their schema/spec using something like this
  • Looking for full-featured OpenAPI generator for Go | 2021-09-26 is the best there is imo. DB CRUD support probably won't happen in that project, if you wanted to you could extend it with java code and moustache template tweaks to make it generate whatever Go code you need. | 2021-09-26
    I have been using for work and personal sutff. It is very minimalist, and uses interface for the server, so iteration easier. It can also generate the types that you need for models, and a client for testing if needed. It does not generate a ton of files like | 2021-09-26
    There's go-server, go-gin-server and go-echo-server in
  • Type-safe OpenAPI server for Rust? | 2021-09-19
    I was assuming the main (official??) Generator and one output language. Their cli(frontend) tool seems to save the version of the backend and recommends checking in the version file and sticking with one version.

What are some alternatives?

When comparing Sapper and openapi-generator you can also consider the following projects:

SvelteKit - The fastest way to build Svelte apps

NSwag - The Swagger/OpenAPI toolchain for .NET, ASP.NET Core and TypeScript.

awesome-svelte-kit - Awesome examples of SvelteKit in the wild

oapi-codegen - Generate Go client and server boilerplate from OpenAPI 3 specifications

smithy - Smithy is a protocol-agnostic interface definition language and set of tools for generating clients, servers, and documentation for any programming language.

fastapi-crudrouter - A dynamic FastAPI router that automatically creates CRUD routes for your models

smithy-go - Smithy code generators for Go (in development)

docsify - 🃏 A magical documentation site generator.

Alpine.js - A rugged, minimal framework for composing JavaScript behavior in your markup.

hotwire-rails - Use Hotwire in your Ruby on Rails app

datasette - An open source multi-tool for exploring and publishing data

rescript-compiler - The compiler for ReScript.