Private beta · careers intelligence

Join the startup before it booms.

Preboom reads the public paper trail most people never see (SEC filings, investors lining up to buy in, hiring surges) and ranks private tech companies by how fast they're taking off. See it early, understand why, and join before the equity reprices and everyone else applies.

Request early access How it works

Built to spot, not to promise. Rankings with evidence, never probabilities.

engine · scoring illustration

Tessellate AI a made-up company · infra · founded 2023

  1. form_d$24M round filed, first sale 3 months earlier+
  2. age2 years old: $12M a year for its age+
  3. board4 directors on the round+
  4. spv3 sponsors formed vehicles to buy in+
  5. hiringopen roles 7 → 16 in twelve weeks+
score78.4Rocketing · top 2%

confidence: well backed · a ranking, not a probability

Last night's run

Runs every night at 19:00 UTC

private tech companies scored
thousands
Rocketing: the top 2%
–
on the watch list
thousands
SEC filings read, since 2016
half a million

Live counts from the engine. Company names stay inside the app.

How it works

Breakouts leave tracks long before the headline.

Preboom follows the trails a company can't help leaving in public, turns each one into a scored signal, and re-ranks every tracked company every night. Each signal's weight comes from a backtest over 2018 to 2024, judged on years the model never saw.

  1. 01

    Record

    Every SEC Form D since 2016, every SPV that forms, and a daily snapshot of every tracked company's job board.

  2. 02

    Score

    Each signal fires or it doesn't, weighted by its tested effect. Missing data counts as average and lowers the confidence.

  3. 03

    Rank

    Rocketing, Primed and Watching are the top 2%, 10% and 25% of tech companies that raised in the last two years.

  4. 04

    Explain

    Every score comes with the dated facts behind it, what we don't know yet, and how it changed week to week.

The signals

Five trails. Three recording today.

  1. Live

    Money

    SEC Form D filings, often filed before the press release. How fast money arrives for a company this young.

  2. Live

    Demand

    Investors forming SPVs to buy in. When outsiders line up for a company's shares, it shows.

  3. Recording

    Talent

    Every tracked job board, snapshotted daily: hiring growth, first recruiter, first sales team.

  4. Soon

    Buzz

    Early chatter and deal talk, read by AI and checked against a hand-labelled test set.

  5. Soon

    Paper trail

    Trademarks, government contracts, and the hires that come before an IPO.

The signals show up in public months before the headline.

illustration · a made-up company
How a made-up company's score climbs as its signals appear An illustration: the score starts just above the Primed line when a funding round is filed, rises as SPV sponsors appear and hiring doubles, crosses the Rocketing line by month seven, and exit proximity turns high when acquisition talks are reported a month before the headline. Rocketing line Primed line score month 0 month 12 Month 0 $24M round filed: Primed Month 4 3 SPV sponsors appear Month 7 Roles 7 → 16: Rocketing Month 11 Deal talk reported · exit high The headline
An illustration of how signals stack up, with a made-up company. Most companies that heat up never make headlines; the point is to see the ones that might, early, with the evidence in front of you.

What you'll see

Every company ranked, with the reasons attached.

A score is only as good as its evidence, so every one comes with dated facts you can check, the confidence behind it, and what we don't know yet.

preboom.io/app · illustration
Company Tier Score vs tier lines Why it's here
Tessellate AIAI infrastructure · CA Rocketing 78.4 3 SPV sponsors; roles 7 → 16
Northwind LabsDeveloper tools · NY Rocketing 71.0 2 rounds in 12 months
Halcyon SecuritySecurity · WA Primed 55.8 New $25M round in the last 6 months
Meridian DataData infrastructure · CO Watching 41.2 4 directors; hiring not measured yet

  • The market, as a heat map

    Which sectors are heating up, week by week, and the companies driving it.

  • Why each company is here

    The raise path, hiring over time, who's lining up to buy in, and the exit tier.

  • Your watchlist

    Star companies and watch them heat up, with private notes only you can see.

  • Roles like yours later

    An agent brings openings that match your background at companies the engine ranks, by email.

Principles

Honest by design.

1

A ranking, not a promise

Scores rank companies, with evidence and a confidence. No "% chance" anywhere, ever.

2

Evidence for every score

Every signal is a dated public fact you can check yourself.

3

Public data, collected politely

SEC filings and companies' own job boards. We never scrape LinkedIn, Glassdoor or Blind.

4

Careers, not investing

Preboom helps you choose where to work. It isn't investment advice and never tells you to buy anything.

Be early to the next breakout.

Preboom is in private beta. Sign-in with Google opens soon, and every account is approved by hand while we're small.

Requests open soon

Pricing will be set during the beta.