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Startups14,448Programs29

14,448 startups · 29 programs

Sitefire

Active · Marketing suite for the agentic web

WebsiteYC profile

Why it ranks

How the rank works
9signal of 100 · rising 9
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5
  • hiringHiring · Titles (titles.fru.dev), YC+2

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

Competitors

OtherTradeXShared: create content, marketing, brandYC W22San FranciscoStartup →AIDarwinShared: agentic webspeedrun SR004San FranciscoStartup →AILimy AIShared: agentic web, brandspeedrun SR005New YorkStartup →AISuperbarShared: marketing, page, driveYC S22TorontoStartup →AIInactiveGluetrailShared: automatically create, marketing, driveYC W23ParisStartup →
Companies closest to Sitefire
Company
TradeXShared: create content, marketing, brandYC W22ActiveOther
DarwinShared: agentic webspeedrun SR004Not statedAI
Limy AIShared: agentic web, brandspeedrun SR005Not statedAI
SuperbarShared: marketing, page, driveYC S22ActiveAI
GluetrailShared: automatically create, marketing, driveYC W23InactiveAI

Adjacent

AIJustAIShared: marketing, agenticYC W24San FranciscoStartup →AIKayaShared: marketing, analytics, growthYC S21Kuala LumpurStartup →AIAffil.aiShared: marketing, contentYC S24San FranciscoStartup →AIRankaiShared: marketing, page, discoveredYC S23San FranciscoStartup →AIAcquiredResonanceShared: marketing, content, automaticallyYC W24San FranciscoStartup →
Companies next to Sitefire
Company
JustAIShared: marketing, agenticYC W24ActiveAI
KayaShared: marketing, analytics, growthYC S21ActiveAI, Data
Affil.aiShared: marketing, contentYC S24ActiveAI
RankaiShared: marketing, page, discoveredYC S23ActiveAI
ResonanceShared: marketing, content, automaticallyYC W24AcquiredAI

Also from W26 in AI

All of W26
AIVeriadAI operating system for advertisingYC W26LondonStartup →AI/dev/fast/dev/fast is the AI-native code forgeYC W26San FranciscoStartup →AI10x ScienceThe AI-native platform for next-generation protein characterization.YC W26San FranciscoStartup →AI21stUI building blocks for the agentic internetYC W26San FranciscoStartup →AIAemonThe Forward-Deployed AI Research EngineerYC W26San FranciscoStartup →AIAgentic FabriqThe control plane for AI agents.YC W26San FranciscoStartup →
Company
VeriadAI operating system for advertisingteam of 2ActiveAI
/dev/fast/dev/fast is the AI-native code forgeteam of 4ActiveAI, Devtools
10x ScienceThe AI-native platform for next-generation protein characterization.team of 5hiringActiveAI
21stUI building blocks for the agentic internetteam of 3ActiveAI, Devtools
AemonThe Forward-Deployed AI Research Engineerteam of 3hiringActiveAI, Devtools
Agentic FabriqThe control plane for AI agents.team of 2ActiveAI

Founders

  • Jochen MadlerFounder/CEO
  • Vincent JeltschFounder/CTO

About Sitefire

Sitefire (YC W26) helps brands market their products to agents. They create content and tools that get their products discovered and used by AI agents (ChatGPT, OpenClaw). Sitefire identifies which content drives AI visibility, and automatically creates it. The teams using Sitefire execute on-page and off-page actions to deliver measurable top-line growth.

YC batch
W26 · Winter 2026
Status, per YC
Active
Category
AI, Data
Team size
2
Location
BY, Germany
Founded
2025
Checked
6h ago

YC tags: Analytics, Marketing, AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

Sitefire in W26: 199 companies, 81% AI

LinkedIn

Sitefire: questions

Which YC batch was Sitefire in?

Sitefire was in Y Combinator's Winter 2026 batch (W26).

Is Sitefire still active?

Y Combinator lists Sitefire as active.

Who founded Sitefire?

Sitefire's founders, as listed on its YC page: Jochen Madler (Founder/CEO), Vincent Jeltsch (Founder/CTO).

Where is Sitefire based?

Sitefire lists BY, Germany as its location on YC's directory.