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Best API Generation Software in 2026

API generation software helps turn defined inputs into APIs and related code. This list is for people comparing tools before choosing one for a project.

  1. 01 Fern
    Free plan Open source Web · Windows · macOS · Linux
    9.0 Visit Specs
  2. 02 DreamFactory

    It is aimed at experienced developers and data architects who need governed API access to data sources and can manage a self-hosted deployment.

    From $1,500/mo Free plan Linux · API · Self-hosted
    8.5 Visit Specs
  3. 03 Swagger Codegen

    Swagger Codegen suits API teams and developers working from OpenAPI descriptions who want generated clients, servers, documentation and scaffolding.

    Free plan Open source Web · Windows · macOS · Linux
    8.3 Visit Specs
  4. 04 TypeSpec

    TypeSpec suits API designers and developers who want shared models to generate specifications, schemas, code, or documentation.

    Free plan Web · Windows · macOS · Linux
    8.2 Visit Specs
  5. 05 Hasura

    Hasura suits developers building APIs over multiple supported databases, whether using cloud hosting, Docker deployment, or on-premises Enterprise Edition.

    Free plan Web · Linux · API · Self-hosted
    8.0 Visit Specs
  6. 06 Directus

    Directus suits teams managing localized content through web APIs and needing custom permissions, previews, webhooks, or transformed assets.

    From $499/mo Free plan Web
    7.9 Visit Specs
  7. 07 PostGraphile

    PostGraphile suits developers building PostgreSQL-backed GraphQL APIs for SaaS products or internal tools.

    From $25/mo Free plan Web · API · Self-hosted
    7.9 Visit Specs
  8. 08 Supabase

    Supabase suits developers and teams building backends around Postgres who need authentication, storage, realtime features, or server-side functions.

    From $25/mo Free plan Web · Windows · macOS · iOS
    7.9 Visit Specs
  9. 09 Xano
    From $85/mo Free plan Web · iOS · Android · API
    7.9 Visit Specs
  10. 10 PocketBase
    Free plan Web · Windows · macOS · Linux
    7.8 Visit Specs
  11. 11 OpenAPI Generator

    It suits developers who need to generate API clients, server stubs, or documentation from OpenAPI specifications.

    Free plan Web · Windows · macOS · Linux
    7.7 Visit Specs
  12. 12 oapi-codegen
    Free plan Linux · Self-hosted
    7.5 Visit Specs
  13. 13 Parse Platform
    Web · Linux · iOS · Android
    7.5 Visit Specs
  14. 14 Stainless

    Stainless suits API teams that use OpenAPI specifications to generate SDKs, documentation or MCP servers.

    Free plan Web · macOS · Linux
    7.5 Visit Specs
  15. 15 Speakeasy
    Web · Windows · macOS · Linux
    7.2 Visit Specs
  16. 16 FastAPI Code Generator
    5.8 Visit Specs
  17. 17 Microsoft Data API Builder
    Windows · macOS · Linux
    5.8 Visit Specs
  18. 18 Microsoft Kiota
    Windows · macOS · Linux
    5.8 Visit Specs
  19. 19 GraphQL Code Generator
    5.7 Visit Specs
  20. 20 GraphQL Mesh
    5.7 Visit Specs
  21. 21 gRPC-Gateway
    5.7 Visit Specs
  22. 22 liblab
    Web
    5.7 Visit Specs
  23. 23 Hey API
    5.6 Visit Specs
  24. 24 ogen
    5.4 Visit Specs
  25. 25 tsoa
    5.1 Visit Specs
How this list is ordered. Specifiction scores each tool on how fully its maker documents it, whether its prices are published, where the research puts it, the platforms it runs on and whether it can be tried for free (how we rank). Makers can also buy a numbered place (how Specifiction is paid for).

Compare generation inputs, output formats, API styles and generated languages. Check the deployment options, platform support, licence, free plan, trial terms and published paid price.

Compare Fern and DreamFactory Get a place on this list

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