Fern

Fern belongs in the catalog because it sits at a high-leverage point in modern API delivery: the layer where API definitions become the SDKs and documentation developers actually touch. The official positioning is explicit about generated SDKs, branded docs, and contract-driven workflows. That makes Fern more than a docs site or a codegen utility in isolation. It is best understood as delivery infrastructure for teams that want their API surface to feel polished and consistent across languages.

It also deserves inclusion because the pricing is public and unusually legible for this category. The checked official pricing page currently shows docs at $0 per month on Basic, $150 per month on Team, and enterprise pricing by contact, while the SDK product is priced separately at $250 per month per SDK for Basic and $600 per month per SDK for Pro, both billed annually. That split matters editorially. Buyers are not choosing a generic developer tool. They are choosing whether to pay for a contract-native publishing and SDK layer that sits directly on the path between an API spec and a production-facing developer experience.