Fern vs Document360: Features, Pricing and User Reviews 2026

Fern

Auto-Generate SDKs and API Documentation

API Documentation OpenAPI Documentation

Document360

AI-Powered Knowledge Base for Teams

Knowledge Management API Documentation+1 more

Fern

Auto-Generate SDKs and API Documentation

API Documentation OpenAPI Documentation

Document360

AI-Powered Knowledge Base for Teams

Knowledge Management API Documentation+1 more

Fern

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.

Document360

Document360 is a software tool that helps organizations create and maintain knowledge bases. A knowledge base is a central place where people can find answers, guides, and instructions about products or services. You can build both public knowledge bases for customers and private ones for employees.

The platform includes powerful editing tools that work like a word processor, making it simple to write and format articles. It offers AI features that help with writing, searching, and translating content. Document360 also provides detailed tracking to see which articles get the most views and what people are searching for.

Companies can customize the appearance to match their brand and integrate Document360 with other tools they already use like support systems and communication platforms.

Features of Fern and Document360

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

Document360

AI-powered writing and search assistance
Visual and markdown editors with media support
Auto-translate to 50+ languages
Version control and rollback options
Custom workflows and approval processes
Detailed analytics and reporting
SEO optimization tools
API documentation support
Team collaboration features
30+ third-party integrations
Custom branding and design
Mobile-responsive knowledge base

Use Cases of Fern and Document360

Fern

Documentation Content Management API Documentation Creation SDK Documentation Generation OpenAPI Specification Documentation

Document360

Documentation Content Management Knowledge Base Management Help Center Creation API Documentation Creation Documentation Search Documentation Usage Analysis

Pricing of Fern and Document360

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.

Document360

Document360 offers three main pricing tiers with custom pricing based on your needs. All plans include a 14-day free trial with full Enterprise features.

The Professional Plan is built for growing teams and includes internal and external knowledge bases, custom domains, auto-translation to 50+ languages, SEO customization, API documentation, and AI writing tools. You also get 24/5 support and guided setup.

The Business Plan adds advanced features for mid-sized teams, including custom workflow builders, embedded help centers, support ticket deflection, advanced analytics, integration with 30+ tools, API support, and a dedicated account manager. This plan includes AI search and answer capabilities.

The Enterprise Plan provides everything in Business plus multiple sign-on options, interactive decision trees, testing environments, security audit trails, dedicated design experts, and 24/5 priority support. Enterprise customers get auto-generated glossaries through AI.

Pricing varies by region and usage. Contact Document360 for specific pricing details tailored to your organization.