Theseus was founded by Ian Laffey, Sacha Lévy in 2024.

Who are Theseus's investors?

Theseus's investors include Y Combinator, First Round Capital, Pioneer, Antler, Endor Capital, Foresite Capital, Fusion, Longitude Capital and 6 more.

How much funding has Theseus raised?

Theseus has disclosed $4.3M raised across 1 of its 2 known rounds.

Where is Theseus headquartered?

Theseus is headquartered in San Francisco, US.

Theseus

YC S24

San Francisco, US · Founded 2024 · 7 employees · Hiring · 14 known investors

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Theseus builds robotic situational awareness software using visual positioning for drones that operate in GPS-denied environments. The company serves military and defense platforms, providing a Micro Visual Positioning System designed for contested operational conditions.

Also known as Theseus Technology Corporation

Advanced Manufacturing AI & Machine Learning Defense Tech Hardware Robotics Drones DefenseUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S24)

Theseus was founded in 2024 by Ian Laffey and Sacha Lévy.

Ian Laffey Co-founder · Chief Executive OfficerFounder of Theseus, which develops visual positioning software for autonomous systems operating in GPS-denied environments.

Sacha Lévy Co-founder · Chief Technology OfficerHe previously conducted computer science research at Yale University on applications of large language models to biological data, and holds a computer engineering degree from McGill University.

Luca Lery MoffatCOO

Carl SchoellerFounderuntil 2025

Yasmin AcevedoRecruiterformer

Investors · 14

Y Combinator✓ confirmed by TheseusSan Francisco · $500K

How we know: the company's own site · the Y Combinator directory · funding news · traded.co · open dataset · 5k.vc investor directory · Not right? Tell us

First Round Capitallisted by First Round CapitalSan Francisco · $100K – $20M

How we know: funding news · traded.co · firstround.com · Y Combinator's founder network · Not right? Tell us

Pioneerlisted by PioneerToronto, Ontario

How we know: Y Combinator's founder network · pioneerfund.vc · open dataset · 5k.vc investor directory · Not right? Tell us

AntlerreportedSingapore · $125K

How we know: funding news · open dataset · 5k.vc investor directory · Not right? Tell us

Endor Capitalreported

How we know: Y Combinator's founder network · Not right? Tell us

Foresite CapitalreportedWest Hollywood

How we know: funding news · press coverage · Not right? Tell us

FusionreportedPalo Alto · $500K – $1M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Longitude CapitalreportedMenlo Park · $10M – $30M

How we know: press coverage · Not right? Tell us

Lux CapitalreportedNew York · $100K – $100M

How we know: funding news · traded.co · Y Combinator's founder network · Not right? Tell us

NexTech VenturesreportedPrague

How we know: press coverage · Not right? Tell us

OrbiMedreportedNew York · $1M – $75M

How we know: press coverage · Not right? Tell us

Pontifax Venture CapitalreportedHerzeliya

How we know: press coverage · Not right? Tell us

Rock Springs CapitalreportedBaltimore

How we know: press coverage · Not right? Tell us

T. Rowe PricereportedBaltimore

How we know: press coverage · Not right? Tell us

Funding

SEC filings, press & company announcements

$4.3M disclosed across 1 of 2 rounds · 2025

$4.3MSeed FundingApr 2025 · 2 sources
First Round Capital (lead), Lux Capital, Y Combinator
Source ↗

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

Related companies · 5

Mass MagneticsMass Magnetics manufactures high-performance neodymium-iron-boron rare-earth magnets in the United States from recycled and domestic feedstocks, using a rapid sintering process and machine learning to sort scrap by grade and chemistry. It targets defense and industrial buyers needing DFARS-compliant domestic magnets and also sells DFARS-compliant rare-earth alloys to domestic metallurgists.

Greypoint IndustriesGreypoint Industries manufactures affordable autonomous interceptor systems designed to counter drone swarm attacks, offering military forces a cost-effective defensive solution that can be deployed and operated by soldiers.

OrnadyneOrnadyne makes flapping-wing unmanned aircraft designed to resemble birds for covert reconnaissance missions. The company addresses limitations of conventional drones by engineering systems optimized for stealth, endurance, and autonomous operation in field environments.

Vernius Systems, Inc.Vernius makes drop-in hardware modules that add autonomous or operator-assisted targeting to existing FPV interceptor drones. The module sits between the drone's receiver and flight controller to provide beyond-visual-range sensing, autonomous guidance, or target bearing data for manual pilots, aimed at low-cost, high-volume defense deployment.

Albacore Inc.Albacore develops mass-producible long-range drone submarines (Ghostfin platform) designed for military autonomous underwater operations. The systems use commercial off-the-shelf components and advanced propulsion technology to enable extended transit and loiter times, with embedded autonomous navigation and analytics for remote mission execution.

Companies working in the same space as Theseus.

Legal entities · 1

corporate structure

Theseus Technology Corporation

In the news

Defense tech Theseus landed Y Combinator, the US Special Forces, and $4.3M from a tweet | TechCrunchtechcrunch.com · Apr 2025

9 startups that stood out on YC Demo Day 2techcrunch.com · Sep 2024

Theseus: GPS Denied Navigation for Dronesycombinator.com · Sep 2024

Frequently asked questions

What does Theseus do?: Theseus builds robotic situational awareness software using visual positioning for drones that operate in GPS-denied environments. The company serves military and defense platforms, providing a Micro Visual Positioning System designed for contested operational conditions.
Who founded Theseus?: Theseus was founded by Ian Laffey, Sacha Lévy in 2024.
Who are Theseus's investors?: Theseus's investors include Y Combinator, First Round Capital, Pioneer, Antler, Endor Capital, Foresite Capital, Fusion, Longitude Capital and 6 more.
How much funding has Theseus raised?: Theseus has disclosed $4.3M raised across 1 of its 2 known rounds.
Where is Theseus headquartered?: Theseus is headquartered in San Francisco, US.