Company Overview
About Fern
Fern is a New York-based API tooling company that automatically generates multi-language SDKs and API documentation from OpenAPI specifications — enabling API companies to publish high-quality client libraries in TypeScript, Python, Java, Go, Ruby, and C# from a single source of truth, eliminating the significant engineering effort of manually building and maintaining SDKs for each programming language a developer audience uses. Founded in 2022 by Danny Sheridan and Deep Singhvi and a Y Combinator Winter 2023 graduate, Fern raised $13 million total including a $9 million Series A led by Bessemer Venture Partners with 30 employees.
Business Model & Competitive Advantage
Fern's SDK generation goes beyond simple code scaffolding: the generated SDKs include idiomatic code patterns for each language (not just translated code that feels foreign to native language speakers), proper error handling, type definitions, authentication patterns, and pagination handling that matches what a senior developer would write by hand. The documentation generation produces reference docs, API playground interfaces, and code examples that match the SDK code, creating a consistent developer experience from first API call through production integration.
Competitive Landscape 2025–2026
In 2025, Fern competes in the API developer experience and SDK generation market with Stainless (SDK generation, raised $25M), Speakeasy (SDK generation), and Postman (API documentation and testing) for API developer tooling. Companies building developer-first products (APIs and developer platforms) invest heavily in SDK quality because poor SDKs directly reduce developer adoption rates — friction in the first integration experience disproportionately affects API product success. Fern's Bessemer Series A validates the commercial opportunity in API tooling infrastructure. Customers include Cohere (AI API), ElevenLabs (voice AI API), and other developer-platform companies where SDK quality directly affects revenue. The 2025 strategy focuses on growing the API company customer base, deepening the SDK generation quality for emerging programming languages, and building the API change management features that help teams handle breaking changes gracefully.
Open Positions
Reddit Discussions
Key Differentiators
Emerging Innovator
Fern is an emerging player bringing innovative solutions to the Infrastructure market.
Frequently Asked Questions
Not So Random Others
Duckie
Duckie is a San Francisco-based AI customer support platform — backed by Y Combinator (W24) with $500,000 in funding from Y Combinator, Andreessen Horowitz, Greylock, KungHo Fund, Netflix, and 5 addit
Cursor
Cursor is an AI-powered code editor built on Visual Studio Code that integrates advanced language models to provide intelligent code completion, generation, debugging, and refactoring capabilities dir
Dusty Robotics
Dusty Robotics is a Mountain View, California-based construction robotics company — backed with $69.5 million in total funding from Root Ventures, Scale Venture Partners, Canaan Partners, GRIDS Capita
Hermes Robotics
Hermes Robotics is an autonomous mobile robot (AMR) and warehouse automation company developing robots and software for logistics and fulfillment operations in warehouses, distribution centers, and ma
Zeffy
Zeffy is a Montreal-based fundraising platform for nonprofit organizations that charges zero platform fees on donations — asking donors to optionally contribute a tip to cover Zeffy's operating costs
Oda Studio
Oda Studio is a United States-based AI-powered interior design platform — backed by Y Combinator (W20) — providing homebuyers, renters, and design enthusiasts with AI tools to discover their personal
Compare Fern with Competitors
Side-by-side AI visibility scores, platform breakdown, and market position.
Claim This Profile
Are you from Fern? Claim your profile to see full AI mention excerpts, get weekly visibility change alerts, and optimize how AI systems describe your brand.
Claim Fern Profile →Track AI Visibility in Real Time
Monitor how ChatGPT, Gemini, Perplexity, and Claude mention Fern vs competitors. Get alerts when AI recommendations shift.
Start Free Tracking →