Plants Plans that grow with you

Automate SDK maintenance so your engineers can spend time on higher-value projects.

Developer docs customized to match your brand.

Easy migration from Mintlify, Readme, & Docusaurus
Hobby
$0/mo

Free forever

For individuals getting started

2 team members
250 AI credits
Custom domain
Guides, API refs, and changelogs
API explorer
Web editor
Trusted by
Team
$150/mo

Billed yearly

Save 25%

For small teams

Everything in Hobby, plus:
5 team members
1,000 AI credits
Custom subpath
Version and product switching
Password-protected docs
PDF exports
Trusted by
Enterprise
Custom

Tailored pricing terms

For scaling teams and enterprises

Everything in Team, plus:
Visitor authentication (JWT,  SSO)
Role-based access control (RBAC)
Translated content
Self-hosting
Enterprise SSO
Dedicated Slack & Teams channel
Trusted by
Protocol support
REST
Webhooks
WebSockets
Server-sent events
Protobuf
Specification support
OpenAPI
OpenAPI Overlays
OpenAPI Arazzo
AsyncAPI
gRPC
GraphQL
OpenRPC
AI features
AI credits
250 credits
1,000 credits
Custom
AI search
AI writing agent
AI translations
/llms.txt
MCP server
Custom
Features
Keyword search
Web editor
API Explorer
Auto-populate API key
Docs-as-code
Markdown guides
Changelog
Landing pages
User feedback
Custom CSS & JavaScript
Version switcher
Product switcher
PDF exports
Custom React
Localization
Publishing
# of sites
1
1
Custom
Custom domain
Custom domain subpath
Preview links
SEO optimizations
Multiple repo sources
Custom
Self-hosting
Remove Fern branding
Custom
Visitor authentication
Password protection
RBAC
JSON web tokens (JWT)
Single sign-on (SSO)
Organization
Members
2
5
Custom
Analytics dashboard
Member roles
Support and SLAs
Email support
Support via Slack & Teams
Standard MSA
Custom MSA
Custom
Incident creation
Custom
Business Associate Agreement
Custom
Security & compliance
User permissions
Dashboard SSO login
SOC 2 Type Il report
Security questionnaire
Custom
Support & services
Dedicated deployed engineer
Custom
Migration services
Custom
Design services
Custom

FAQs

Common questions related to security, trust, and compliance.

Does Fern only do API docs?

No, Fern provides customers with the ability to offer customized Docs including cookbooks, guides, an API explorer, and more.

How customizable is the look and feel of your Docs site?

Fern is completely customizable. We offer a robust brand template that can edited. In addition, customers can add custom JS, CSS, and React components.

Security Reviews

Security reviews are offered with our Enterprise plan.

Custom MSAs

Custom MSAs are offered with our Enterprise plan.

Who is our compliance vendor?

Our compliance certifications can be found here.

Where are we based?

The entire team is based in Williamsburg, New York.

Who are your investors?

We're raised $12M+ from Bessemer, YC, and top-tier investors.

Get started today

Our team partners with you to perfect your OpenAPI spec and launch SDKs that scale to millions of downloads.

Start with SDKs, add Docs anytime.

Language support
Basic
$250/mo per SDK, billed annually.

For small teams who are just beginning their API journey.

Up to 50 endpoints
Support for REST APIs
Automated publishing to registries
Add unlimited custom code
Schema validation
Trusted by

14 day free trial †

Pro
$600/mo per SDK, billed annually.

For companies looking for purpose-built SDKs.

Everything in Basic, plus:
Up to 150 endpoints
SSE, WebSockets and Webhooks
Dedicated Slack support channel
Pagination, Retries, and OAuth
Trusted by
Enterprise
Custom per SDK, billed annually.

For enterprises who need fully-featured SDKs with a dedicated team.

Everything in Pro, plus:
Unlimited endpoints
SDK Migration services
Enterprise support and SLAs
Github Issue triage + monitoring
Custom code maintenance
Trusted by
Basic
$250/mo
per
SDK
Get started
Get started
Pro
$600/mo
per
SDK
Book a demo
Book a call
Enterprise
Custom
Book a demo
Book a call
Protocols
REST API (OpenAPI)
Up to 50 endpoints
Up to 150 endpoints
Unlimited
Webhook verification
WebSockets (AsyncAPI)
Server-sent events
gRPC
OpenRPC
Authentication
Basic, bearer, API key
OAuth 2.0
HMAC, digest
Augment with custom code
Custom logic
Custom dependencies
Custom code maintenance
Features
Strongly typed
Idiomatic method names
Schema validation
Multipart form data
Forward compatibility
Polymorphism
Auto-pagination
Retries with backoff
Idempotency headers
Mock server tests
Integration tests
Automation
Semantic versioning
Registry publishing
Merge multiple APls
Up to 5
Unlimited
Filter with audiences
Code Snippets
In the SDK
In GitHub
In your Fern Docs
In your third-party docs
Via our API
Dynamically via your API
Onboarding and Support
Support channels
OpenAPI audit
SDK migration services
GitHub issue triage
Service level agreement
SOC 2 report
Integration
Github & Gitlab
NPM
PyPI
Maven
RubyGems
Packagist

FAQs

Common questions related to security, trust, and compliance.

What languages do you support?

We support 7 languages: TypeScript, Python, Go, Java (Kotlin), PHP, Ruby. Swift and Rust are on our roadmap next.

Can I add custom code?

Yes, you can extend the generated SDKs with custom code and dependencies.

What plan is right for me as an AI company?

AI companies require specific features like Websockets and SSE so most AI companies subscribe to a Pro or Enterprise plan.

What is migration process for my existing SDKs?

Fern provides complete migration support for your existing SDKs as part of our Enterprise plan. It will be written into your contract.

Can I merge multiple OpenAPI specs?

Yes, you can provide multiple OpenAPI specs and Fern will automatically combine common namespace and generate one combined SDK.

Who maintains and responds to community contributions?

On the Basic and Pro plans, you are responsible for monitoring and managing community contributions. With our Enterprise plan, Fern takes care of reviewing all community contributions and ensuring updates are merged in.

Security Reviews

Security reviews are offered with our Enterprise plan.

Custom MSAs

Custom MSAs are offered with our Enterprise plan.

Who is our compliance vendor?

Our compliance certifications can be found here.

Where are we based?

The entire team is based in Williamsburg, New York.

Who are your investors?

We're raised $12M+ from Bessemer, YC, and top-tier investors.

Get started today

Our team partners with you to perfect your OpenAPI spec and launch SDKs that scale to millions of downloads.