Join the fern team

Fern automated SDK maintenance, allowing us to support all popular programming languages without needing dedicated engineering resources. Working with the Fern team is like having 'McKinsey for APIs' -- they bring expert-level guidance in OpenAPI and SDK design.

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.

We used an alternative SDK generator, OpenAPI Generator, for years, and customers constantly complained. Since adopting Fern, customers have migrated rapidly to our new SDKs and have been blown away by the quality.

The Fern team helped us offer a top-tier developer experience. They embedded with our docs team, migrated over 700+ pages of content, and created an intuitive information architecture across API reference, guides and SDK reference.

The Fern Definition is absolutely fantastic. Compared to OpenAPI, it's more ergonomic and comes with powerful capabilities - you can organize endpoints by resource, import types across files, and represent complex APIs like server sent events and websockets.

Fern is a mission-critical part of Candid's API. Keeping our docs, SDKs, and server implementation in sync was a nightmare. Fern enabled us to adopt API-first development — our engineers update the spec, run fern generate, and everything stays perfectly aligned.

Fern has been instrumental in delivering an incredible onboarding experience to our customers. We often get compliments in sales calls and during new pilot onboardings about the quality of our docs.