SDK Customer Showcase

At Fern, we help businesses build and distribute world-class SDKs that developers love. From startups to global enterprises, our customers trust Fern to elevate their developer experience and simplify API integration. Below are some of the companies leveraging Fern to power their SDKs.

Square
Square

Public company

Square trusts Fern to generate and maintain 7 SDKs, ensuring their APIs are easily accessible to developers building on any platform.

Check out Square’s SDKs as they become generally available:

Go SDK

View the Go source code in GitHub

Pinecone
Pinecone

gRPCREST

Pinecone leverages Fern to create an SDK that supports both gRPC and REST, bridging the gap between broad compatibility and peak performance.

Check out Pinecone’s C# SDK here:

C# SDK

View the C# source code in GitHub

Read about the first auto-generated SDK with gRPC and REST.

ElevenLabs
ElevenLabs

File uploadsWebSockets

ElevenLabs uses Fern to generate SDKs with advanced capabilities for file uploads and websocket communication, enabling smooth interactions with their AI-powered audio APIs.

Check out these features in ElevenLabs’ SDKs here:

Candid
Candid

OAuth

Candid uses Fern to generate an SDK with built in OAuth support, enabling secure and seamless authentication for developers.

Check out OAuth in Candid’s SDK here:

Humanloop
Humanloop

SSE

Humanloop uses Fern to support server-sent events (SSE) in their SDKs, allowing developers to build robust AI features with LLMs using best-in-class tooling.

Check out SSE in Humanloop’s SDK here:

Abound
Abound

Integration tests

Abound relies on Fern to manage a full suite of integration tests, ensuring their SDKs and APIs deliver a reliable experience for partners and developers.

Check out Abound’s integration tests here:

TypeScript SDK

View the source code for integration tests

Ready to streamline your SDK development? Get started with Fern today.