Industry

YC Security Companies

131 Y Combinator security startups with verified founder contacts, batch info, and company data.

131

Companies

108

Active

Acquired

Public

YC Company Directory

31 companies

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Company	Batch	Description	Status	Location	Team	Founders	Reveal
Dyneti Technologies	W19	Reduce payment fraud	Active	San Francisco, CA, USA	3	Julia Zheng	Reveal
Termius	W19	Termius is an SSH client with team collaboration features	Active	—	35	Roman Kudiyarov, Dmitry Lyfar	Reveal
Anjuna	W18	Anjuna enabled organizations to trust any infrastructure	Active	Palo Alto, CA, USA	55	Ayal Yogev	Reveal
Anjuna	W18	Anjuna enabled organizations to trust any infrastructure	Active	San Francisco, CA, USA; Palo Alto, CA, USA	55	Ayal Yogev	Reveal
Hunter2	W18	Hunter2 trains engineering teams in application security through…	Acquired	Boston, MA, USA	—	Fletcher Heisler	Reveal
Quantstamp	W18	Security auditing for Web3	Active	San Francisco, CA, USA; Remote	80	Richard Ma	Reveal
Sqreen	W18	Sqreen is the application security platform for the modern enterprise	Acquired	San Francisco, CA, USA	120	Pierre Betouin, Jean-Baptiste Aviat	Reveal
Vanta	W18	Vanta—the proven leader in automated compliance helping startups…	Active	San Francisco, CA, USA	700	Christina Cacioppo	Reveal
Ambient.ai	W17	AI company transforming enterprise physical security to prevent…	Active	San Francisco, CA, USA	150	Shikhar Shrestha, Vikesh Khanna	Reveal
Apozy	W17	Apozy makes every website safe to browse	Active	San Francisco, CA, USA; Remote	9	Erhan Justice	Reveal
Castle	W16	Block bots & bad behavior	Active	San Francisco, CA, USA; Remote	20	Johan Brissmyr, Sebastian Wallin	Reveal
Salt Security	W16	Protects organizations from getting breached through their APIs.	Active	New York City, NY, USA; Tel Aviv-Yafo, Tel Aviv District, Israel	200	Roey Eliyahu, Michael Nicosia	Reveal
CyberFend	W15	Cyberfend delivers robust, real-time web and mobile security by…	Acquired	San Francisco, CA, USA; Santa Clara, CA, USA	2	Sreenath Kurupati	Reveal
Smyte	W15	Smyte stops bad actors on social networks and marketplaces.	Acquired	San Francisco, CA, USA	11	Pete Hunt, Julian Tempelsman, Josh Yudaken	Reveal
Swif.ai	S20	The guardrail for AI on every device	Active	880 W Maude Ave, Sunnyvale, CA 94085, USA	20	Angelo (KC) Huang	Reveal
Swif.ai	S20	Manage every device. Govern every AI agent.	Active	San Francisco, CA, USA	20	Angelo (KC) Huang, Angelo Huang	Reveal
Vectrix	S20	Scan your SaaS apps and instantly identify security issues	Acquired	San Francisco, CA, USA	7	Corey Mahan, Alex Dunbrack, Matthew Lewis	Reveal
Canix	S19	Canix makes it easy to get and stay compliant as a cannabis business.	Active	San Francisco, CA, USA; Remote	22	Stacey Hronowski	Reveal
Canix	S19	Canix makes it easy to get and stay compliant as a cannabis business.	Active	San Francisco, CA, USA	22	Stacey Hronowski	Reveal
LunaSec	S19	An Open Source dependency security tool that is smarter than the rest	Inactive	Seattle, WA, USA; Remote	4	Free Wortley, Matthew Bryant	Reveal
Traces	S19	Transform your video monitoring with AI	Active	Mountain View, CA, USA	10	Veronika Yurchuk, Kostyantyn Shysh	Reveal
TRM Labs	S19	TRM is building a safer world for billions of people.	Active	San Francisco, CA, USA; Remote	400	Esteban Castaño, Rahul Raina, Esteban Castano	Reveal
D-ID	S17	Enable creators and developers to generate realistic AI personas	Active	Tel Aviv-Yafo, Tel Aviv District, Israel	27	Sella Blondheim, Eliran Kuta, Gil Perry	Reveal
D-ID	S17	Enable creators and developers to generate realistic AI personas	Active	Tel Aviv-Yafo, Israel	27	Sella Blondheim, Eliran Kuta, Gil Perry	Reveal
Templarbit	S17	Protecting applications from malicious activity	Acquired	San Francisco, CA, USA	11	Bjoern Zinssmeister	Reveal
Upfort	S17	Turnkey security & hassle-free cyber insurance from leading insurers	Active	San Francisco, CA, USA; Remote	38	Han Wang, Daniel Bilbao	Reveal
Upfort	S17	Turnkey security & hassle-free cyber insurance from leading insurers	Active	San Francisco, CA, USA	38	Han Wang, Daniel Bilbao	Reveal
Upfort	S17	Turnkey security & hassle-free cyber insurance from leading insurers	Active	San Francisco, CA, USA	38	Han Wang, Daniel Bilbao	Reveal
Appcanary	S15	Appcanary tracks the dependencies you use in your apps and servers…	Acquired	Toronto, ON, Canada	2	Filipa Mendonça-Vieira, Max Veytsman	Reveal
Foxpass	S15	Making enterprise security practices available for all companies.	Acquired	San Francisco, CA, USA	10	Aren Sandersen	Reveal
Sift	S11	The Leader in Digital Trust & Safety	Active	San Francisco, CA, USA	—	Jason Tan	Reveal

Batch Distribution

XX261 XX258 WW267 WW253 WW247 WW2310

Status Breakdown

Active108 Acquired19 Inactive4

Top Locations

San Francisco72 New York City12 New York6 Paris4 Seattle4 Tel Aviv-Yafo3

About YC Security Companies

Y Combinator has funded 131 security companies since its founding in 2005. These startups span from early-stage pre-launch to publicly traded companies, making YC one of the most prolific backers of security innovation globally.

108 of these companies are currently active. 19 have been acquired. VCBacked tracks verified founder contact information, team sizes, and company status for every YC security startup.

Related Industries

B2B3278 Healthcare805 Fintech709 Consumer654 Engineering, Product and Design610 Industrials489 Infrastructure303 Productivity208

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