Fern vs Readme: Features, Pricing and User Reviews 2026
Readme
Interactive API Documentation & Developer Hubs
Readme
Interactive API Documentation & Developer Hubs
What are Fern and Readme?
Fern is a platform that automatically generates SDKs and API documentation from your API definition. You provide your OpenAPI, AsyncAPI, or gRPC specification, and Fern creates ready-to-use client libraries in languages like TypeScript, Python, Go, Java, Ruby, C#, PHP, and Swift.
The platform also builds documentation websites that look professional and match your brand identity. These sites include interactive API references, code examples, and a playground where developers can test your API without leaving the documentation.
Fern is open source and available on GitHub. It integrates with your existing workflow by publishing SDKs directly to package registries like npm and PyPI. The tool is designed for companies that want to provide a great developer experience without dedicating engineering resources to manual SDK maintenance.
Readme is a platform that lets you create and publish interactive developer documentation for your APIs. Unlike traditional documentation tools, Readme automatically generates API references from your OpenAPI or Swagger files and keeps everything in sync with your code.
The platform includes a built-in editor where you can write guides, add code examples, and explain how your API works. Developers using your API can test endpoints directly from the documentation with the Try It feature, making it easier to understand how everything works.
Readme also provides analytics so you can see which parts of your documentation get the most views and where developers might be getting stuck, helping you improve your API experience over time.
Features of Fern and Readme
Automatic SDK generation in 8+ programming languages
Stripe-style API documentation websites
Direct publishing to package registries
OpenAPI and AsyncAPI support
Interactive API playground with live testing
Custom branding and domain support
Built-in OAuth 2.0 and authentication
Automatic pagination and retry logic
WebSocket and SSE support
Version control with Git
AI-powered search assistant
Open source on GitHub
Interactive API reference with Try It functionality
OpenAPI and Swagger file sync
Markdown editor for guides and tutorials
Multiple API version management
Custom domains and white-label branding
Real-time analytics and usage tracking
Team collaboration with reviews and branching
Changelog and discussion forums
SSO and advanced security
AI-powered documentation tools
Mobile responsive design
Use Cases of Fern and Readme
Pricing of Fern and Readme
Fern offers separate pricing for SDKs and documentation to fit different team needs.
For SDK generation, there are three tiers available:
Basic Plan ($250/month per SDK): Supports up to 50 endpoints with REST API support, automated publishing, and schema validation. Billed annually.
Pro Plan ($600/month per SDK): Includes up to 150 endpoints, WebSockets, webhooks, dedicated Slack support, and advanced features like pagination and OAuth. Billed annually.
Enterprise Plan (Custom pricing): Offers unlimited endpoints, SDK migration services, enterprise support with SLAs, GitHub issue monitoring, and custom code maintenance.
For documentation, pricing includes:
Basic Plan ($400/month): Stripe-like API reference, API playground, custom domain, and built-in components. Billed annually.
Pro Plan ($1,000/month): Everything in Basic plus custom React components, authenticated docs, role-based access control, and AI search capabilities. Billed annually.
Enterprise Plan (Custom pricing): Includes white-glove content migration, custom integrations, SSO authentication, design services, and enterprise support.
Readme offers flexible pricing to match different team sizes and needs. The platform provides four main plans plus an optional AI booster.
The Free plan costs nothing and includes unlimited API versions, interactive API reference, markdown editor, and basic AI features like AI Dropdown and LLMs.txt support.
The Startup plan at $99 per month adds important features like custom domains, changelogs, discussion forums, MDX components, and the Agent Owlbert AI assistant with AI Doc Linting.
The Business plan at $399 per month removes Readme branding and adds advanced features including CSS/HTML customization, reusable content, metrics export, and branching for team workflows.
The Enterprise plan offers custom pricing with everything in Business plus dedicated design help, shared component libraries, custom JavaScript, audit logs, SSO, and full Docs Audit capabilities with Ask AI API access.
FAQs: Fern vs Readme
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