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Fern vs xyd: Features, Pricing and User Reviews 2026

Compare features, pricing, reviews, and more to make an informed decision

Try Fern
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Fern

Fern generates production-ready SDKs and beautiful API documentation automatically from your OpenAPI specification for multiple programming languages.

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API Documentation ToolsOpenAPI Documentation Tools
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Try xyd
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xyd

xyd is a free open-source documentation framework that helps developers build fast, beautiful, and interactive documentation sites with ease.

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Developer Documentation PlatformsDocs-as-Code Platforms
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Fern

  • 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

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xyd

  • Six beautiful built-in themes available

  • Automatic API docs from OpenAPI, GraphQL, TypeScript, React

  • Hot reload development server with zero configuration

  • Full customization of all components and layouts

  • Rich plugin ecosystem for search, analytics, chat

  • Interactive code examples and dynamic content

  • Built-in analytics and A/B testing support

  • Lightning-fast full-text search functionality

  • Open source and completely free

  • Migration tools from other frameworks

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Fern

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.

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xyd

xyd is completely free and open source, with no hidden costs or premium tiers. You can download, use, modify, and distribute it without paying anything. The entire codebase is available on GitHub under an open source license, meaning you have full access to all features from day one.

There are no subscription plans, user limits, or feature restrictions. Whether you are a solo developer, small team, or large enterprise, you get the same complete framework at no cost. The open source model means the community can contribute improvements, and you can customize xyd to fit your exact needs without vendor lock-in.

For companies that want professional support or custom development, you can contact the LiveSession team directly, though the framework itself remains free for everyone to use.