Built with Fern
From startups to public companies, Fern powers your API developer experience.
SDKs customers
Publish client libraries in popular languages.
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.
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.
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 is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
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 APls like server sent events and websockets.
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.
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 is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
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 APls like server sent events and websockets.
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.
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.
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 APls like server sent events and websockets.
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.
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.
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.
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 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.
Docs customers
Developer documentation tailored to your brand.
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.
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.
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.
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 is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
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 APls like server sent events and websockets.
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.
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.
Fern is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
Fern is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
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 APls like server sent events and websockets.
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.
Fern is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
Ask Fern customers
Instant answers for your Docs with AI search.
Fern is absolutely elite. Fern made it easy for us to single-source our developer resources — from code examples in the docs to our Postman Collection and SDKs. Migrating to Fern was the the smoothest migration I've ever experienced, and we were live in under a month.
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