17.8
Fern Docs builds interactive documentation websites from Markdown and API specifications, while Fern also generates strongly typed client libraries.
Free planOpen sourceWebAPILinux
Best API Generation Software in 2026
API generation software creates APIs or related code from defined inputs. The chart compares generation inputs, output formats, API styles, generated languages and deployment options. If you plan to work from a Xiaomi, Redmi or POCO phone, check the product page for an Android app before choosing. Platform entries include web, Linux, self-hosted, macOS, Windows and API setups.
27.6
Supabase is a backend platform built around a Postgres database, with services for authentication, file storage, realtime data, and server-side functions.
Free planAndroidiOSWeb
37.6
Swagger Codegen generates API client libraries, server stubs and documentation from OpenAPI or Swagger definitions.
Free planOpen sourceWebAPILinux
- 4
Xano
Free planAndroidiOSWebAPI7.5From $85 a month - 5
Hasura
Hasura GraphQL Engine creates a data API over connected databases, so developers can expose data without writing handlers, schemas, or resolvers.
Free planWebAPILinuxSelf-hosted6.9Free plan - 6
PocketBase
Free planAndroidiOSWebAPI6.9Free plan - 7
TypeSpec
TypeSpec is a language for defining APIs and data models, then producing schemas, API specifications, code, and documentation.
Free planWebExtensionLinuxmacOS6.9Free plan - 8
PostGraphile
PostGraphile creates GraphQL APIs backed mainly by PostgreSQL, for uses such as SaaS backends and internal business tools.
Free planWebAPISelf-hosted6.7From $25 a month - 9
6.6From $499 a month - 10
DreamFactory
DreamFactory is a self-hosted data gateway and enterprise access platform that provides governed API access to data sources.
Free planAPILinuxSelf-hosted6.6From $1,500 a month - 11
OpenAPI Generator
OpenAPI Generator creates API clients, server stubs, and documentation from OpenAPI 2.0 and 3.x documents.
Free planWebLinuxmacOSSelf-hosted6.5Free plan - 12
Parse Platform
Parse Platform is an open-source backend for mobile and web applications that can run on infrastructure supporting Node.js, including your own infrastructure.
AndroidiOSWebAPI6.5 - 13
Stainless
Stainless generates SDKs, documentation, and MCP servers from OpenAPI specifications.
Free planWebLinuxmacOS6.4Free plan - 14
Speakeasy
Speakeasy is an AI control plane for connecting, securing, and observing agents and MCP servers from one entry point.
WebAPILinuxmacOS5.9 - 15
oapi-codegen
oapi-codegen is a free, open-source command-line tool and Go library that converts OpenAPI specifications into Go server implementations, API clients, and HTTP models.
Free planLinuxSelf-hosted5.8Free plan - 16
Microsoft Kiota
LinuxmacOSWindows4.8 - 17
Microsoft Data API Builder
LinuxmacOSWindows4.7 - 18
liblab
Web4.6 - 194.5
- 204.4
- 214.3
- 224.3
- 234.3
- 244.3
- 254.3
Choosing well
Match inputs and output formats
Start with the inputs your project can provide, then check the output formats a tool generates. These fields are part of the chart comparison and can affect how well the result fits your codebase.
Check API styles and languages
Compare the API styles and generated languages listed for a tool. A match with your backend language and preferred API approach can reduce conversion work.
Choose a deployment setup
Review deployment options before deciding. Tools in this category can run on the web, Linux, self-hosted systems, macOS, Windows or API-based setups, depending on the product.
Review price and source access
A free plan is available from tools in this category, while pricing can range from free to paid plans or pricing on request. Check trial terms and the stated starting price.
Open-source code is available from tools such as GraphQL Mesh and Microsoft Kiota. If you need to read or change the code, check the licence and deployment details.
Questions people ask
Can I start without paying?
A free plan is offered by tools in this category. Pricing details vary, so compare the listed free plan, paid starting price and trial terms.
Are open-source options available?
Yes. Open-source code is offered by tools in this category, including GraphQL Mesh and Microsoft Kiota.
Which platforms are covered?
Platform entries include web, Linux, self-hosted, macOS, Windows and API setups. Check a product's listing for its specific deployment model.
What should I compare before choosing?
Compare free plan, paid from, generation inputs, output formats, API styles, generated languages and deployment options.