Customers

Built with Fern

From startups to public companies, Fern powers your API developer experience.

SDKs

Publish client libraries in popular languages.

Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
IoT platform for fleet and operations management
Identity and access management platform
No-code website builder with CMS management
Feature flag management platform
Neural search-as-a-service for enterprises
Voice generation and parsing AI platform
Vector database for AI applications
Enterprise LLM platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Notification infrastructure for developers
Unified API for B2B integrations
Speech-to-text API provider
API for healthcare payments & insurance
Data import & onboarding platform
Payments infrastructure and monetization platform for software companies
AI-enhanced geospatial intelligence
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
IoT platform for fleet and operations management
Identity and access management platform
No-code website builder with CMS management
Neural search-as-a-service for enterprises
Voice generation and parsing AI platform
Enterprise LLM platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Notification infrastructure for developers
Unified API for B2B integrations
API for healthcare payments & insurance
Data import & onboarding platform
Payments infrastructure and monetization platform for software companies
AI-enhanced geospatial intelligence
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
IoT platform for fleet and operations management
No-code website builder with CMS management
Neural search-as-a-service for enterprises
Voice generation and parsing AI platform
Enterprise LLM platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Notification infrastructure for developers
Unified API for B2B integrations
API for healthcare payments & insurance
Data import & onboarding platform
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
Feature flag management platform
Enterprise LLM platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Notification infrastructure for developers
Unified API for B2B integrations
Data import & onboarding platform
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
Feature flag management platform
Enterprise LLM platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Notification infrastructure for developers
Unified API for B2B integrations
Speech-to-text API provider
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
IoT platform for fleet and operations management
Vector database for AI applications
Speech-to-text API provider
Data import & onboarding platform
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
API for healthcare payments & insurance
Notification infrastructure for developers
Speech-to-text API provider
Voice AI infrastructure for developers
Point-of-sale & payment processing platform

We evaluated several SDK generators and Fern stood out for its clean, language-native, and thoughtfully architected code. The Fern team partnered with us every step of the way including OpenAPI improvements, alpha releases and launch announcements.

John Fellman
Head of Engineering, Developer Platform
Feature flag management platform
Enterprise LLM platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Notification infrastructure for developers
Unified API for B2B integrations
Data import & onboarding platform
Voice AI infrastructure for developers

Docs

Developer documentation tailored to your brand.

Enterprise automation and integration platform
No-code website builder with CMS management
Feature flag management platform
Blockchain data & compliance platform
AI-driven threat intelligence platform
Identity verification and compliance platform
Data orchestration with Apache Airflow
Intelligent document processing platform
AI customer support automation platform
Voice generation and parsing AI platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Enterprise LLM platform
API gateway for accessing open and proprietary LLMs
Financial management platform for startups
Payment processing and merchant services platform
Speech-to-text API provider
API for healthcare payments & insurance
Newsletter publishing and growth platform
Data import & onboarding platform
Payments infrastructure and monetization platform for software companies
AI-enhanced geospatial intelligence
Voice AI infrastructure for developers
Identity verification & fraud prevention
Open-sourced AI agents with stateful memory
Enterprise automation and integration platform
No-code website builder with CMS management
Feature flag management platform
AI customer support automation platform
Voice generation and parsing AI platform

Partnering with Fern, we went from 1 SDK → 4 SDKs and are set up to offer whatever language developers ask for next. Fern also generates our documentation website that perfectly matches Cohere's unique brand identity.

Billy Trend
Developer Relations Engineer
Enterprise LLM platform
Payments infrastructure and monetization platform for software companies
Open-sourced AI agents with stateful memory
No-code website builder with CMS management
Payments infrastructure and monetization platform for software companies
No-code website builder with CMS management
Feature flag management platform
Identity verification and compliance platform
AI-enhanced geospatial intelligence
Identity verification & fraud prevention
Feature flag management platform
No-code website builder with CMS management
Blockchain data & compliance platform
AI-driven threat intelligence platform
Financial management platform for startups
No-code website builder with CMS management
AI customer support automation platform
Voice generation and parsing AI platform
Payments infrastructure and monetization platform for software companies
Identity verification & fraud prevention

Ask Fern

Let your customers find answers in your documentation instantly with AI search.

No-code website builder with CMS management
Voice generation and parsing AI platform
API gateway for accessing open and proprietary LLMs
Speech-to-text API provider
Payments infrastructure and monetization platform for software companies
Voice AI infrastructure for developers

Get started today

We’ll guide you through launching and scaling your API Docs & SDK to reach millions of views and downloads.