OpenSEO

Active · Open source alternative to Semrush and Ahrefs

YC F26

Website YC profile

Why it ranks

How the rank works

7signal of 100 · rising 7

went through YCProgram · this site+4
team of 2Team size · YC's directory+2.5

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

Also from F26 in AI

All of F26

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Agent RelayThe infrastructure to run coding agents for your teamteam of 2ActiveAI, Devtools	AI, Devtools	Active
AgeospatialPhysical intelligence for every decision with Geospatial AI.ActiveAI	AI	Active
antimattrvoice-first hardware interface for human-agent interactionteam of 2ActiveAI	AI	Active

About OpenSEO

Connect to your AI Agent in 2 minutes. Get expert level advice tailored to your business backed by real data like keyword search traffic, backlinks, and technical audits of your site. Here are some good skills to start with: /seo-audit What 1-2 changes to your website will drive more traffic? /keyword-research Find topics worth writing about? /competitor-analysis Understand your competitors’ SEO strategy.

YC batch: F26 · Fall 2026
Status, per YC: Active
Category: AI, Developer tools
Team size: 2
Location: Boston, MA, USA
Checked: 8d ago

YC tags: Open Source, Marketing, SEO

Changes seen

Changes to OpenSEO seen by the refresh
Change	Seen
Listed in YC F26	Oct 5, 2026yesterday

OpenSEO in F26: 111 companies, 87% AI

OpenSEO: questions

Which YC batch was OpenSEO in?

OpenSEO was in Y Combinator's Fall 2026 batch (F26).

Is OpenSEO still active?

Y Combinator lists OpenSEO as active.

Where is OpenSEO based?

OpenSEO lists Boston, MA, USA as its location on YC's directory.