AfterQuery

Applied research lab curating data solutions to accelerate foundation model development.

Foundation models and researchY Combinator

Latest funding

$30M Series A · April 23, 2026

Led by Altos Ventures · Source: Beinsure

Total raised: $30.5M* across 2 sourced rounds

All 2 rounds ↓

Website: afterquery.com.

X: @afterquery · 3,831 followers.

LinkedIn: linkedin.com.

Category: Foundation models and research.

Sectors: AI.

Subcategory: foundation model data curation.

Stage: Series A.

Based in: San Francisco, United States.

Total raised: $30.5M* in 2 sourced rounds.

Last round: Apr 23, 2026 · 203 days ago.

Team: 30 people on the team page.

On Recent Funding since: Sep 22, 2026.

Signals

X account@afterquery · created Feb 7, 2025 (21 months old) · 3,831 followers

Website registeredJan 12, 2025 (22 months old)

TIMELINE · MONEY RAISED

AfterQuery | 466 days from website to first raise on record

@afterquery·Raised $30M in 1 sourced round·2 signals before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

April 23, 2026
Series A · $30M · $300M valuation
AAltos Ventures (lead)
Source: Beinsure
February 7, 2025
X account created
January 12, 2025
Website created
Date unknown
Round · $500K*
YY Combinator
Source: ycombinator.com

Founders and team

SM
Spencer Mateega Co-Founder, CEO

LinkedIn · source: foundertrace.com
CG
Carlos Georgescu CTO, Co-Founder

LinkedIn · source: foundertrace.com
DT
Danny Tang Co-Founder

LinkedIn · source: foundertrace.com

Investors

Companies like AfterQuery

BBlank Bio$7.2M Seed · May 2026
FFoundation IndustriesSeed · Jul 2026
PPolymathicPre Seed · Mar 2026
PPhylo$13.5M Seed · Feb 2026

Other companies backed by Altos Ventures

FFirecrawl$75M Series B+ · Sep 2026
CCandex$40M Series B+ · Mar 2026
AAmae Health$25M Series B+ · Nov 2025
TTracksuit$25M Series B+ · Jun 2025
PPopulix$4.3M Series B+ · Apr 2025
CCandidly$52.5M Series B+ · Feb 2025

Altos Ventures portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/afterquery (get a free API key).