Foxy
Agent online

Know about new YC startups first.

Foxy watches five sources and pings your Slack the moment a new company appears — or a founder announces before YC does.

Add to Slack How it works

Free · nothing to install

5.0 on Pond 297 alerts sent 2,475 tracked

The gap

You hear it days before the market does.

Day 0 Founder posts. Foxy alerts you.
Day 11 YC lists them. Everyone else finds out.
24Fall 2026 listed by YC
100sactually in the batch

In Slack

Two kinds of alert.

# yc-signals · 9:14 AM
FoxyApp9:14 AM
Founder announced before YC
Company
Adalat AI
Source
X
Status
Not in YC directory
Confidence
100%

“Adalat AI is now backed by Y Combinator. We're the first nonprofit…”

Original post·Website

The one worth acting on. Nobody else has seen it yet.

# yc-signals · 2:03 PM
FoxyApp2:03 PM
New YC company
Company
Talos
Batch
Fall 2026
Location
Baltimore, MD
Team
3

Predictive maintenance for power infrastructure.

YC profile·talos-us.com

Still useful. Just not exclusive.

Why Foxy

Three reasons it earns its place.

Day 0Foxy tells you
Day 11YC publishes

Foxy reads what founders post and checks it against the directory, so you hear about a company while it is still unlisted.

$ foxy sweep yc_directory 100 seen 3 new $ foxy sweep yc_directory 100 seen 0 new

Every company it has ever seen is remembered. Run it a hundred times and each one is reported exactly once.

YC Directory$0
Launch YC$0
Speedrun$0
X and LinkedInoptional key

Three of the five sources are public feeds that cost nothing. Add a key later only if you want wider reach.

Ready in one minute.

Approve it, choose a channel, and Foxy takes it from there.

Add to Slack Setup guide

The idea

The directory runs late.

Foxy treats it as the answer key, not the source. It reads founder posts first, then asks whether YC has published them yet.

The pipeline

From a post to an alert.

Tap a step.

Every eight hours it checks all five sources for anything new.

Drops the obvious noise: recruiters, advice threads, people congratulating a friend.

Pulls the company name and batch out of however the founder happened to write it.

Looks the company up in the directory that governs its programme: YC's, or Speedrun's.

Posts to Slack with one of three verdicts.

Verdicts

What Foxy concludes.

Tap one to see a real example.

“Adalat AI is now backed by Y Combinator. We're the first nonprofit…”

EarlyCompany read as Adalat AI. Not in the YC directory.

Fires an alert. This is the one worth acting on.

“We got into Y Combinator! Agnost AI (YC S26) is the infra for self-improving agents.”

ConfirmedExact match found: Agnost AI, Summer 2026.

Still alerts, marked as already published.

“We got into YC S26. And for the first time in the history of YC startups…”

UnverifiedGenuine announcement, but no company name is stated.

Goes to the daily digest. Foxy will not claim it is missing from YC, because it never checked.

Why the third one exists. If Foxy cannot identify a company, it does not get to say the company is absent from YC. Treating “I couldn't check” as “it isn't there” is how a monitor starts crying wolf.

Accuracy

Measured, not claimed.

100%
Precision
88%
Recall
15
Real posts tested

Every lookalike below contains a textbook announcement phrase and would fool a keyword search:

8 startups I referred got into YCa referrer
exactly one year ago today, we got into Y Combinatoran anniversary
I invested early into a startup that was recently acceptedan investor

Sources

Where it looks.

YC DirectoryNew companies, newest firstFree
Launch YCFounder launch postsFree
Speedrun251 a16z companies, SR001 to SR007Free
XFounder announcementsKey optional
LinkedInPosts and new company pagesKey optional
Speedrun is a16z's, not YC's. Foxy monitors the real one, and watches YC's sitemap in case that ever changes.

Pricing

Start free. Pay when it earns it.

Every workspace gets fifty alerts to find out whether Foxy catches the companies you care about.

Free
$0

50 alerts, then it pauses

  • All five sources
  • Early founder signals included
  • Checked every eight hours
  • Never the same company twice
Add to Slack
Most popular
Pro
$5 per month

1,000 alerts a month

  • Founders who announce before YC publishes
  • All five sources, every eight hours
  • Follow-up in thread when YC confirms
  • Priority on new sources
  • Cancel any time
Get Pro on Pond
Team
Let's talk

Built around how you work

  • Several channels or workspaces
  • Sources picked for your thesis
  • Webhook into your CRM
  • A human who answers
Get in touch

Plans are sold and billed through Pond. Foxy never sees a card.

What counts as an alert?

One company, once. A detection reported to your channel — a new YC or Speedrun listing, or a founder announcing before the directory catches up. Foxy remembers everything it has seen, so the same company is never counted twice.

What happens when the free alerts run out?

Foxy pauses and says so in your channel. Nothing is lost — it keeps watching, and picks up from where it stopped the moment you upgrade.

Do I need an API key?

No. Three of the five sources are public feeds that cost nothing. X and LinkedIn reach further with a free search key, and Foxy works without one.

Can I cancel?

Any time, through Pond. Your workspace drops back to the free plan and keeps everything it has already received.

Setup

Click, choose a channel, done.

Nothing to install and nothing to run. Foxy is hosted, so approving it in Slack is the whole setup.

1 Add to Slack Approve the app in your workspace.
2 Choose a channel Pick it from a dropdown. No channel IDs.
3 That is it Alerts arrive every eight hours.
Add to Slack

Free · about one minute

Prefer to run it yourself? Everything below still works, and the code is on GitHub. Self-hosting means your data never leaves your machine.

Self-hosted, from the terminal:

git clone https://github.com/ana-momin/Foxy.git
cd Foxy
python -m app.cli init
docker compose up -d
git clone https://github.com/ana-momin/Foxy.git
cd Foxy
pip install -r requirements.txt
python -m app.cli init
uvicorn app.main:app --port 8000

init checks your token, lists your channels, joins the one you pick, and sends a test message before writing anything.

$ python -m app.cli init Connected to Acme Inc as @Foxy Where should alerts go? 1. #yc-signals (already added) 2. #general Enter 1-2: 1 Sent, go and check Slack. Saved to .env. Setup is done.

Confirm

Check the memory works.

python -m app.cli sweep --dry

Run it twice. The second should report 0 new, which is why Foxy never tells you about the same company twice.

Optional

Add a key, widen coverage.

SerperMuch better X and LinkedIn reach2,500 free
AnthropicUnderstands unusual phrasings< $2/mo
twitterapi.ioFull X search$0.15 / 1k
ApifyFull LinkedIn post text$0.005 / post
Tuning. Keywords and thresholds live in config.yaml. Adding a phrase is a config edit, never a code change.

Hosting

Keeping it running.

DockerAny machine. Restarts itself.Simplest
GitHub ActionsEvery 8h free. Needs a free Postgres.Free
VercelHosts the Pond agent endpoints.This site
Pond agent. Foxy speaks Pond Protocol V1. Its manifest and health check are public.
Renaming an app you already installed? Editing the manifest file will not rename it. Open your app, go to App Manifest, paste the current one, save, then Reinstall.