# Fern

> Fern is a Brooklyn-born developer tools company that turns API definitions into branded documentation, language-specific SDKs and tools for AI agents. Founded in 2022, it joined Postman in January 2026 and continues as an independent product within the company.

- **Founded:** 2022
- **Headquarters:** New York, United States
- **Founders:** Danny Sheridan (Co-founder and CEO), Deep Singhvi (Co-founder and CTO), Zach Kirsch (Co-founder; former Fern builder)
- **Products:** Fern SDK Generator, Fern Docs, Ask Fern, Fern Agent, Fern CLI
- **Notable:** Joined Y Combinator Winter 2023., Raised a $9 million Series A in April 2025, bringing announced total funding to $13 million., Reported more than 200 customer companies at the January 2026 Postman acquisition.

## Products & services

- **Fern SDK Generator** — Generates typed, language-specific client libraries from API definitions, with release, publishing, retries, pagination and customization workflows.
- **Fern Docs** — Builds branded API documentation sites with guides, generated references, an API explorer, versioning and docs-as-code editing.
- **Ask Fern** — AI search and answers within documentation, with controls for versions, products and reader roles.
- **Fern Agent** — Reads documentation analytics, search and feedback, then proposes edits through the dashboard, Slack or MCP.
- **Fern CLI** — Commands for initializing projects, validating definitions, generating SDKs and publishing docs; the product line also includes agent-facing API CLI tooling.

## Achievements

- Joined Y Combinator Winter 2023.
- Raised a $9 million Series A in April 2025, bringing announced total funding to $13 million.
- Reported more than 200 customer companies at the January 2026 Postman acquisition.
- Auth0 case study reports 7,000-plus engineering hours saved annually through generated SDKs.
- Frame.io case study reports first successful API call time falling from 1–14 days to under an hour.
- Fern SDKs and Docs remained independent products after Postman acquired the company in January 2026.

## Latest updates

- **2026-09** — Published Fern Agent engineering account and continued SDK and CLI updates.
- **2026-08** — Launched Fern Agent to work across documentation content, analytics, navigation and styling.
- **2026-06** — Two product designers described rebuilding Fern’s marketing site in five weeks, with approximately $4,225 in Claude Code spend.
- **2026-05** — Redesigned the Fern website around product outcomes, including interactive Docs and SDK examples.
- **2026-01** — Postman acquired Fern; Fern said its brand and product would continue independently.

## Links

- Website: https://buildwithfern.com/
- LinkedIn: https://www.linkedin.com/company/buildwithfern
- Twitter/X: https://twitter.com/buildwithfern
- GitHub: https://github.com/fern-api

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Profile page: https://yespress.io/fern
Published by YesPress — https://yespress.io
Last updated: 2026-09-29