# Y Combinator's Cybersecurity Investments: 45 Startups in Its Portfolio (2026) > The 45 Cybersecurity startups Y Combinator has backed, by stage: $1.1B raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/y-combinator-cybersecurity-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Pre-seed and seed 22 - [Journey](https://millionrounds.com/company/journey) - [Authy](https://millionrounds.com/company/authy) - [ContraForce](https://millionrounds.com/company/contraforce) - [*BA* Better Auth](https://millionrounds.com/company/better-auth) - [Next Caller](https://millionrounds.com/company/next-caller) - [SuperTokens](https://millionrounds.com/company/supertokens) - [Repacket](https://millionrounds.com/company/repacket) - [Tesseral](https://millionrounds.com/company/tesseral) - [PromptArmor](https://millionrounds.com/company/promptarmor) - [Xeol](https://millionrounds.com/company/xeol) - [Optery](https://millionrounds.com/company/optery) - [Telivy](https://millionrounds.com/company/telivy) - [LunaSec](https://millionrounds.com/company/lunasec) - [NudgeLabs](https://millionrounds.com/company/nudgelabs) - [Trench](https://millionrounds.com/company/trench) - [Alacrity](https://millionrounds.com/company/alacrity) - [GhostEye](https://millionrounds.com/company/ghosteye) - [Cotool](https://millionrounds.com/company/cotool) - [*E* Entry](https://millionrounds.com/company/entry) - [Blyss](https://millionrounds.com/company/blyss) - [Glasskube](https://millionrounds.com/company/glasskube) - [Magic Agentic ID](https://millionrounds.com/company/magic-agentic-id) ## Series A 8 - [Red Balloon](https://millionrounds.com/company/red-balloon) - [MedCrypt](https://millionrounds.com/company/medcrypt) - [Sqreen](https://millionrounds.com/company/sqreen) - [Feroot Security](https://millionrounds.com/company/feroot-security) - [AuthZed](https://millionrounds.com/company/authzed) - [*A* Authologic](https://millionrounds.com/company/authologic) - [Upfort](https://millionrounds.com/company/upfort) - [*S* Smyte](https://millionrounds.com/company/smyte) ## Stage not reported 7 - [CLEAR](https://millionrounds.com/company/clear) - [Strike](https://millionrounds.com/company/strike) - [Paladin Drones](https://millionrounds.com/company/paladin-drones) - [Kangaroo](https://millionrounds.com/company/kangaroo) - [*PC* Paladin Cyber](https://millionrounds.com/company/paladin-cyber) - [BlockScore](https://millionrounds.com/company/blockscore) - [Firezone](https://millionrounds.com/company/firezone) ## Series C and later 4 - [SecurityScorecard](https://millionrounds.com/company/securityscorecard) - [*SS* Sift Science](https://millionrounds.com/company/sift-science) - [Wallarm](https://millionrounds.com/company/wallarm) - [Flashpoint](https://millionrounds.com/company/flashpoint) ## Series B 4 - [Infisical](https://millionrounds.com/company/infisical) - [SafeBase](https://millionrounds.com/company/safebase) - [*R* Riot](https://millionrounds.com/company/riot) - [Inscribe](https://millionrounds.com/company/inscribe) ## Segment by segment ### Pre-seed and seed 22 startups · $57M raised - [**Journey**](https://millionrounds.com/company/journey) Journey provides mental health solution. United States $7.7M - [**Authy**](https://millionrounds.com/company/authy) Authy provides strong authentication for the connected world, protecting people and the enterprise against malicious attacks. United States $6.1M - [**ContraForce**](https://millionrounds.com/company/contraforce) ContraForce is an AI-powered Security Delivery Platform founded in 2020, based in McKinney, Texas, with additional locations in Fr United States $5.2M - [*BA* **Better Auth**](https://millionrounds.com/company/better-auth) Ethiopia $5.0M - [**Next Caller**](https://millionrounds.com/company/next-caller) Next Caller develops and offers a real time call verification technology solution that provides phone fraud detection services. United States $5.0M - [**SuperTokens**](https://millionrounds.com/company/supertokens) SuperTokens is an open-source user authentication and session management platform founded in 2019. United States $3.5M - [**Repacket**](https://millionrounds.com/company/repacket) Repacket makes browsing the internet secure. United States $3.5M - [**Tesseral**](https://millionrounds.com/company/tesseral) Tesseral is a technology startup based in San Francisco, founded in 2023. United States $3.3M ### Series A 8 startups · $100M raised - [**Red Balloon**](https://millionrounds.com/company/red-balloon) Red Balloon specializes in digital marketing, website design, branding, digital strategy, and e-commerce automation services. United States $22M - [**MedCrypt**](https://millionrounds.com/company/medcrypt) Medcrypt is a cybersecurity company founded in 2016, specializing in proactive security solutions and strategic consulting for med United States $16M - [**Sqreen**](https://millionrounds.com/company/sqreen) Sqreen is a monitoring and protection platform made to be incredibly powerful yet very easy to use. United States $14M - [**Feroot Security**](https://millionrounds.com/company/feroot-security) Feroot Security is an AI-native cybersecurity and compliance platform based in Toronto, Ontario, Canada. Canada $14M - [**AuthZed**](https://millionrounds.com/company/authzed) AuthZed is a New York-based software company founded in 2020 that specializes in permissions systems as a service. United States $12M - [*A* **Authologic**](https://millionrounds.com/company/authologic) Poland $8.2M - [**Upfort**](https://millionrounds.com/company/upfort) Upfort is a cybersecurity and cyber insurance platform that combines advanced security tools with comprehensive insurance coverage. United States $8.0M - [*S* **Smyte**](https://millionrounds.com/company/smyte) Smyte stops bad actors on marketplaces and social networks. United States $6.3M ### Stage not reported 7 startups · $278M raised - [**CLEAR**](https://millionrounds.com/company/clear) Clear is a fintech platform that provides services for invoices, taxes, payments, and credit. United States $146M - [**Strike**](https://millionrounds.com/company/strike) Strike Ventures, a new model for early growth investing. Uruguay $94M - [**Paladin Drones**](https://millionrounds.com/company/paladin-drones) Paladin Drones is a simple system to give first responders instant situational awareness United States $18M - [**Kangaroo**](https://millionrounds.com/company/kangaroo) Kangaroo is a New York-based entertainment company that develops NFT-based storytelling video games. United States $15M - [*PC* **Paladin Cyber**](https://millionrounds.com/company/paladin-cyber) United States $3.6M - [**BlockScore**](https://millionrounds.com/company/blockscore) BlockScore provides real-time identity verification services. United States $2.0M - [**Firezone**](https://millionrounds.com/company/firezone) Firezone is an open-source, zero-trust access platform founded in 2021 and headquartered in Mountain View, California. United States $500K ### Series C and later 4 startups · $502M raised - [**SecurityScorecard**](https://millionrounds.com/company/securityscorecard) SecurityScorecard is a leader in cybersecurity ratings and third-party risk management, providing AI-driven solutions for continuo United States $278M - [*SS* **Sift Science**](https://millionrounds.com/company/sift-science) United States $107M - [**Wallarm**](https://millionrounds.com/company/wallarm) Wallarm is a prominent provider of API and AI security solutions, headquartered in San Francisco, California. United States $66M - [**Flashpoint**](https://millionrounds.com/company/flashpoint) Flashpoint is an international tech investment firm with approximately $500 million in assets under management (AUM), focusing on U.S. Ireland $52M ### Series B 4 startups · $147M raised - [**Infisical**](https://millionrounds.com/company/infisical) Infisical is a San Francisco-based cybersecurity startup founded in 2022 by Maidul Islam, Vlad Matsiiako, and Tony Dang. United States $56M - [**SafeBase**](https://millionrounds.com/company/safebase) Safebase interprets and analyses large data to improve operations through big data, machine learning and artificial intelligence. United States $33M - [*R* **Riot**](https://millionrounds.com/company/riot) France $30M - [**Inscribe**](https://millionrounds.com/company/inscribe) InScribe is a digital student support and community platform based in Denver, Colorado, founded in 2017. United States $28M **How this map is made.** Every startup here works in Cybersecurity and has raised money in a round we track that names Y Combinator as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Sector portfolio **Y Combinator's AI portfolio** 1,143 startups · $44B](https://millionrounds.com/portfolio-maps/y-combinator-ai-portfolio)[Sector portfolio **Y Combinator's Fintech portfolio** 338 startups · $24B](https://millionrounds.com/portfolio-maps/y-combinator-fintech-portfolio)[Sector portfolio **Y Combinator's Big Data & Analytics portfolio** 201 startups · $3.4B](https://millionrounds.com/portfolio-maps/y-combinator-big-data-analytics-portfolio)[Sector portfolio **Y Combinator's Healthtech portfolio** 150 startups · $4.2B](https://millionrounds.com/portfolio-maps/y-combinator-healthtech-portfolio)[Sector portfolio **Y Combinator's IT Services portfolio** 148 startups · $840M](https://millionrounds.com/portfolio-maps/y-combinator-it-services-portfolio)[Sector portfolio **Y Combinator's Web3 & Crypto portfolio** 139 startups · $7.4B](https://millionrounds.com/portfolio-maps/y-combinator-web3-crypto-portfolio) ## Raising from investors like Y Combinator? Find the investors who back startups like yours, with their cheques, rounds and partners, in the app with filters, lists and exports. [Find investors](https://millionrounds.com/login?join=1&next=/app/investors)[Market maps](https://millionrounds.com/market-maps)