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Well Run profileThe Chase Pack · #329 of 720

Position 329

Chalk

Real-time data and compute platform that feeds fresh context to ML models and agents

Pace
4:40/kmTempo3.5
Distance
Distance Half.
Open ops roles
2
Last week
#275
Move
▼ 54
Peak
#275
Weeks in the 100
0
The Chart →
Rank and score over time
Board rank
#265#296#327#275Oct 18#317Oct 25
Pace score
02463.5Oct 183.5Oct 25

One point per Sunday re-rank, tracking since Oct 18. The lines fill in week by week.

Chalk runs in the Tempo lane (4:40/km): 129 of 166. Further right = more momentum. No competitors on the board yet, so it runs alone.
Total raised
$60M+see rounds ↓
Founded
2022
HQ
San Francisco, CA

Leadership

The problem

Fraud, lending and AI apps need fresh features at inference time, not stale batch data

What they do

Real-time data and compute platform that feeds fresh context to ML models and agents

Traction Team 30 to ~100 in ~2 years; customers incl. Whatnot, Ramp, Socure, Sunrun

Hiring trend

Open roles
19
Ops roles
2
Headcount
~100

Headcount +170% YoY to ~90-100 (LinkedIn); 17 open roles

Hiring in

  • San Francisco
  • New York
  • London
  • Remote (Singapore)

Funding

Last round
$50M
Stage
Series A
Date
May 2025

Led by Felicis

Distance

Half · edge: hard to leave

Runs inside fraud and ranking systems at Whatnot, Ramp and Socure; team tripled in two years.

Sources: Chalk: Introducing Chalk Compute (Jun 2026) ↗

Last checked Oct 25, 2026

Funding historyTotal raised $60M+

  1. May 2025Series A$50Mat $500MLed by Felicis chalk.ai ↗
  2. Dec 2023Seed$10MLed by General Catalyst, Unusual Ventures, Xfund chalk.ai ↗

Profile facts checked Oct 19, 2026. Every fact links to its public source.

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