Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Fern

Acquired · Instantly offer SDKs and API Docs

WebsiteYC profile

Why it ranks

How the rank works
16signal of 100 · rising 5
  • team of 30Team size · YC's directory+7.7
  • acquiredOutcome · YC, program pages, Acquisitions+4
  • went through YCProgram · this site+4

A sum of public facts, not a judgement and not investment advice.

Competitors

AITheneoShared: api docs, api documentationYC W22TbilisiStartup →Developer toolsJSightShared: api documentation, sourceAlchemist Class 29DelawareStartup →Developer toolsTerminalShared: including industry, industry leader, apiYC S23TorontoStartup →AIWandShared: multiple source, syncAWS GenAI Inaugural cohortStartup →
Companies closest to Fern
Company
TheneoShared: api docs, api documentationYC W22ActiveAI, Devtools
JSightShared: api documentation, sourceAlchemist Class 29Not statedDevtools
TerminalShared: including industry, industry leader, apiYC S23ActiveDevtools
WandShared: multiple source, syncAWS GenAI Inaugural cohort +1Not statedAI

Adjacent

OtherWindwalkShared: industry leaderYC W19AustinStartup →Developer toolsAcquiredDyteShared: api, sdksYC W21BengaluruStartup →Developer toolsVerifiableShared: apiYC S20San FranciscoStartup →AIVeryfi, Inc.Shared: api, sdksYC W17San FranciscoStartup →DataReJotShared: api, sdks, docsYC W25AmsterdamStartup →
Companies next to Fern
Company
WindwalkShared: industry leaderYC W19ActiveOther
DyteShared: api, sdksYC W21AcquiredDevtools
VerifiableShared: apiYC S20ActiveDevtools
Veryfi, Inc.Shared: api, sdksYC W17ActiveAI, Devtools
ReJotShared: api, sdks, docsYC W25ActiveData, Devtools

Also from W23 in AI

All of W23
AIAcquiredDAGWorks Inc.Open source tools & services for reliable AI Agents & AI ApplicationsYC W23San FranciscoStartup →AIEscapeOffensive security for the teams that are 100x outnumberedYC W23ParisStartup →AIAcquiredHeliconeLLM Observability for DevelopersYC W23San FranciscoStartup →AIInfisicalSecurity infrastructure for developers and agentsYC W23San FranciscoStartup →AIAcquiredLangfuseOpen source LLM engineering platformYC W23BerlinStartup →AILiteLLMCall every LLM API like it's OpenAI [100+ LLMs]YC W23San FranciscoStartup →
Company
DAGWorks Inc.Open source tools & services for reliable AI Agents & AI Applicationsacquiredteam of 2AcquiredAI, Devtools
EscapeOffensive security for the teams that are 100x outnumberedteam of 29hiringActiveAI, Devtools
HeliconeLLM Observability for Developersteam of 5acquiredAcquiredAI, Data, Devtools
InfisicalSecurity infrastructure for developers and agentsteam of 70hiringActiveAI, Devtools
LangfuseOpen source LLM engineering platformteam of 26acquired by ClickHouseAcquiredAI, Data, Devtools
LiteLLMCall every LLM API like it's OpenAI [100+ LLMs]59.6k starsteam of 20ActiveAI, Devtools

About Fern

APIs underpin the internet but are still painful to work with. They are often untyped, unstandardized, and out-of-sync across multiple sources of truth. Fern helps companies deliver SDKs and API documentation that they’re are proud to share with their customers. Since launching in 2023, we’ve been trusted by over 200 customers, including industry leaders like Square, Webflow, ElevenLabs, Auth0, and Intercom, to power their developer and agent experiences. We’re fewer than 40 people, based in Brooklyn, NY, and are building open source.

YC batch
W23 · Winter 2023
Status, per YC
Acquired
Category
AI, Developer tools
Team size
30
Location
New York City, NY, USA
Checked
6h ago

YC tags: Developer Tools, SaaS, B2B, Open Source, API

Fern in W23: 274 companies, 69% AI

Fern: questions

Which YC batch was Fern in?

Fern was in Y Combinator's Winter 2023 batch (W23).

Is Fern still active?

Y Combinator lists Fern as acquired.

Where is Fern based?

Fern lists New York City, NY, USA as its location on YC's directory.