Fundraising Fox

Crimson

YC X25

London, GB · Founded 2025 · 6 employees · 7 known investors

Crimson uses AI to automate document review, evidence sorting, and case file organization for litigation and arbitration teams. The platform is designed to free lawyers from tedious administrative tasks so they can focus on case strategy and advocacy.

AI & Machine LearningEnterprise SoftwareLegalTechSaaSLegalAIUnited KingdomEurope

Founders & leadership· Y Combinator alumni (X25)

Crimson was founded in 2025 by Mark Feldner and David Strömbäck.

MFMark Feldner
Mark FeldnerinFounderMark Feldner worked as a litigator at a major law firm before founding Crimson, which builds AI tools for litigation workflows.
DSDavid Strömbäck
David StrömbäckinFounderDavid Strömbäck is the founder of Crimson, an AI platform that automates document review and case file organization for litigation and arbitration teams.

Investors · 7

Y Combinator✓ verifiedSan Francisco · $500K
Twenty Two Ventures✓ verifiedPalo Alto · $50K – $250K
Amino CapitalreportedPalo Alto · $100K – $10M
Eight CapitalreportedCaguas
Progressive VenturesreportedPalo Alto

Also in the syndicate · 2

Scale Asia VenturesSymphony Ventures

Funding

SEC filings, press & company announcements

$2.5M disclosed across 1 of 2 rounds · 2026

Source: company announcements and press reports — follow each round's link for the claim.

In the news

Crimson Raises $2.5M in Seed Fundingfinsmes.com · May 2026YC-Backed Crimson Raises Oversubscribed $2.5M Seed Round to Bring Case Intelligence to Litigationlawfuel.com · May 2026YC-Backed Crimson Raises Oversubscribed $2.5M Seed Round to Bring Case Intelligence to Litigation | Crimsoncrimson.law · May 2026Litigation Platform Crimson Announces $2.5M Seed Round, New York Office | Law.comlaw.com · May 2026Litigation AI startup founded by former City lawyer raises $2.5mnonbillable.co.uk · May 2026AI litigation legaltech start-up Crimson raises $2.5m in seed funding round - The Global Legal Postgloballegalpost.com · May 2026Crimson litigation AI playbook: From task-level tools to matter-wide intelligence - Legal IT Insiderlegaltechnology.com · Jan 2026Crimson: The AI Associate for Litigation Lawyersycombinator.com · May 2025

Frequently asked questions

What does Crimson do?
Crimson uses AI to automate document review, evidence sorting, and case file organization for litigation and arbitration teams. The platform is designed to free lawyers from tedious administrative tasks so they can focus on case strategy and advocacy.
Who founded Crimson?
Crimson was founded by Mark Feldner, David Strömbäck in 2025.
Who are Crimson's investors?
Crimson's investors include Y Combinator, Twenty Two Ventures, Amino Capital, Eight Capital, Progressive Ventures.
How much funding has Crimson raised?
Crimson has disclosed $2.5M raised across 1 of its 2 known rounds.
Where is Crimson headquartered?
Crimson is headquartered in London, GB.