OpenSEO
New accelerator entry · 2026-09-29 · the record
In their words
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.
What the record says
Checked away from the directory entry. Neither line below comes from the company's Y Combinator page.
OpenSEO is the open source alternative to Ahrefs and Semrush. Keyword research, backlinks, rank tracking, and site audits, billed by usage instead of a $100-plus monthly subscription. Self-host it free, or connect it to your AI agents over MCP.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Counted only where a thread links to this company's own site, announces it by name on that forum, or names it beside its own Y Combinator batch. A thread whose title merely carries the words is not counted — a name is not an identifier. Hacker News is not us, and nothing above is our opinion of the company.
Founders, titles and bios as the company published them. Photographs are our own copies of the ones on that record, so they do not break when the original link expires.
- 1 founder named on the directory entry.
- One of 171 companies held here in B2B › Marketing.
No investor is drawn from a Form D — the form states how many invested and never who. The one investor on this graph is named because a batch has exactly one.
Want the whole picture on OpenSEO?
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
A Full Report on OpenSEO: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on OpenSEO covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
10 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
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The full profile
Source Check, INVEST, RECRUIT and Press Requests on OpenSEO
- Source Check — verify Ben Senescu's other claims against the registers that hold them.
- INVEST — size up this company on the figures its record states.
- RECRUIT — see who is already on the team.
- Press Requests — connect with Ben Senescu for a story.
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Is this you?
If you're behind OpenSEO: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. FoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.
Sourced from the company's Y Combinator directory entry, from the company's own site, read directly on 2026-09-30 (openseo.so), from the public GitHub account that record links to (every-app), and from Hacker News, where 3 threads met the matching rule stated beside the count.