runsonwhat

FYI Combinator's tech stack

What does FYI Combinator use?

FYI Combinator (fyicombinator.com) uses at least 7 tools we can see from public records, including Vercel for hosting, PostHog for analytics, web-vitals for monitoring and Let's Encrypt for security. Last checked .

Re-check liveVisit fyicombinator.com
Tools found
7
Categories
5
Layers
4 of 5
Last checked
Oct 2026

FYI Combinator's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

1 tool, where the bytes are served from

Hosting & Cloud

Application

1 tool, what the product is built with

Frontend

Data & Observability

2 tools, what they measure and store

Monitoring

Analytics

Company Ops

3 tools, what the team runs on day to day

Security & Compliance

Companies like FYI Combinator also use

Tools common among companies with a similar stack that we haven't found at FYI Combinator.

Companies with a stack like FYI Combinator's

Ranked by shared tools, with rare tools counting more.

FYI Combinator tech stack FAQ

What tools does FYI Combinator use?

We've found 7 tools at FYI Combinator (fyicombinator.com). Edge & Hosting: Vercel. Application: Next.js. Data & Observability: web-vitals and PostHog. Company Ops: Let's Encrypt, Sectigo and Google Trust Services. Last checked October 2, 2026.

What cloud does FYI Combinator run on?

FYI Combinator uses Vercel for hosting. We found Vercel through DNS records.

What analytics tools does FYI Combinator use?

FYI Combinator uses PostHog for analytics. We found PostHog through website code.

Does FYI Combinator use Let's Encrypt?

Yes. We found Let's Encrypt at FYI Combinator through DNS records. Let's Encrypt is used by 23,019 companies we track.

How does runsonwhat know what FYI Combinator uses?

We read public traces only: FYI Combinator's DNS and email records, certificate logs, the code its website loads, and published subprocessor lists. A tool is listed only when a direct record backs it up. DNS is rechecked weekly and the website monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.