# Top 50 Security Startups in the United States by Funding (2026) > The 50 best-funded security startups in the United States, ranked by total funding raised: $29B combined. Source: https://millionrounds.com/top-lists/security-startups-united-states (Millionrounds; every figure on the page links to its filing or article) - 1 [**Hadrian** Hadrian is a machine parts startup that manufactures precision components for technology companies.](https://millionrounds.com/company/hadrian) Hadrian is a machine parts startup that manufactures precision components for technology companies. *Founded* 2020 United States **$2.2B** last round Oct 2026 - 2 [**KnowBe4** KnowBe4 is a security platform for security awareness training and simulated phishing attacks.](https://millionrounds.com/company/knowbe4) KnowBe4 is a security platform for security awareness training and simulated phishing attacks. *Founded* 2010 Clearwater, United States **$1.8B** last round Jun 2025 - 3 [**Verkada** Verkada Inc.](https://millionrounds.com/company/verkada) Verkada Inc. *Founded* 2016 San Mateo, United States **$1.6B** last round Jul 2026 - 4 [**Rubrik** Rubrik offers live data access for recovery and application development by fusing enterprise data management with web-scale IT.](https://millionrounds.com/company/rubrik) Rubrik offers live data access for recovery and application development by fusing enterprise data management with web-scale IT. *Founded* 2014 Palo Alto, United States **$1.6B** last round May 2025 - 5 [**Keyfactor** Keyfactor is a global leader in digital trust, specializing in public key infrastructure (PKI) and crypto-agility solutions.](https://millionrounds.com/company/keyfactor) Keyfactor is a global leader in digital trust, specializing in public key infrastructure (PKI) and crypto-agility solutions. *Founded* 2001 Independence, United States **$1.1B** last round Jul 2026 - 6 [**NinjaOne** NinjaOne is a cloud-native Unified IT Operations Platform that simplifies IT management for Managed Service Providers (MSPs) and corporate IT departments.](https://millionrounds.com/company/ninjaone) NinjaOne is a cloud-native Unified IT Operations Platform that simplifies IT management for Managed Service Providers (MSPs) and corporate IT departments. *Founded* 2013 Austin, United States **$900M** last round Jun 2026 - 7 [**True Anomaly** True Anomaly is a defense technology company specializing in space defense.](https://millionrounds.com/company/true-anomaly) True Anomaly is a defense technology company specializing in space defense. *Founded* 2022 Englewood, United States **$860M** last round May 2026 - 8 [**Chainguard** Chainguard is a cybersecurity company founded in 2021, focused on software supply chain security.](https://millionrounds.com/company/chainguard) Chainguard is a cybersecurity company founded in 2021, focused on software supply chain security. *Founded* 2021 Kirkland, United States **$776M** last round Oct 2025 - 9 [**Upwind**](https://millionrounds.com/company/upwind) *Founded* - United States **$750M** last round Oct 2026 - 10 [**Quantum Computing** Quantum Computing is developing processes to commercialize quantum computing hardware and application services.](https://millionrounds.com/company/quantum-computing) Quantum Computing is developing processes to commercialize quantum computing hardware and application services. *Founded* 2018 Hoboken, United States **$750M** last round Oct 2025 - 11 [**Saviynt** Saviynt is a global enterprise identity security company based in El Segundo, California.](https://millionrounds.com/company/saviynt) Saviynt is a global enterprise identity security company based in El Segundo, California. *Founded* 2010 El Segundo, United States **$740M** last round Dec 2025 - 12 [**Quantinuum** Quantinuum accelerates quantum computing and the development of applications across chemistry, cybersecurity, finance, and optimization.](https://millionrounds.com/company/quantinuum) Quantinuum accelerates quantum computing and the development of applications across chemistry, cybersecurity, finance, and optimization. *Founded* 2021 Broomfield, United States **$700M** last round Sept 2026 - 13 [**Fidium** Fidium was developed to defy consumer expectations of network and internet service providers.](https://millionrounds.com/company/fidium) Fidium was developed to defy consumer expectations of network and internet service providers. *Founded* 2021 Mattoon, United States **$665M** last round Mar 2026 - 14 [**Island** Island is an innovative company founded in 2020, specializing in the Enterprise Browser.](https://millionrounds.com/company/island) Island is an innovative company founded in 2020, specializing in the Enterprise Browser. *Founded* 2020 Dallas, United States **$650M** last round Sept 2026 - 15 [**SandboxAQ**](https://millionrounds.com/company/sandboxaq) *Founded* - United States **$650M** last round Jun 2026 - 16 [**Dataminr** Dataminr develops an artificial intelligence platform designed for real-time event and risk detection.](https://millionrounds.com/company/dataminr) Dataminr develops an artificial intelligence platform designed for real-time event and risk detection. *Founded* 2009 New York, United States **$587M** last round Apr 2025 - 17 [**Tanium** Tanium is a privately held company focused on Autonomous IT, specializing in cybersecurity and systems management.](https://millionrounds.com/company/tanium) Tanium is a privately held company focused on Autonomous IT, specializing in cybersecurity and systems management. *Founded* 2007 Kirkland, United States **$577M** last round May 2018 - 18 [**Illumio** Illumio is a cybersecurity company based in Sunnyvale, California, specializing in breach containment and Zero Trust segmentation.](https://millionrounds.com/company/illumio) Illumio is a cybersecurity company based in Sunnyvale, California, specializing in breach containment and Zero Trust segmentation. *Founded* 2013 Sunnyvale, United States **$558M** last round Jun 2021 - 19 [**Armis**](https://millionrounds.com/company/armis) *Founded* - United States **$547M** last round Nov 2025 - 20 [**ReliaQuest** ReliaQuest is a leading cybersecurity company based in Tampa, Florida, dedicated to enhancing enterprise security.](https://millionrounds.com/company/reliaquest) ReliaQuest is a leading cybersecurity company based in Tampa, Florida, dedicated to enhancing enterprise security. *Founded* 2007 Tampa, United States **$530M** last round Apr 2025 - 21 [**Cybereason** Cybereason is an endpoint detection and response platform that identifies cyber attacks for effective response.](https://millionrounds.com/company/cybereason) Cybereason is an endpoint detection and response platform that identifies cyber attacks for effective response. *Founded* 2012 San Diego, United States **$509M** last round Mar 2025 - 22 [**Flock Safety** Flock Safety develops security solutions using automated license plate recognition (ALPR) cameras.](https://millionrounds.com/company/flock-safety) Flock Safety develops security solutions using automated license plate recognition (ALPR) cameras. *Founded* 2017 Atlanta, United States **$485M** last round Apr 2026 - 23 [**CrowdStrike** CrowdStrike is a global cybersecurity leader with an advanced cloud-native platform for protecting endpoints, cloud workloads, identities and data.](https://millionrounds.com/company/crowdstrike) CrowdStrike is a global cybersecurity leader with an advanced cloud-native platform for protecting endpoints, cloud workloads, identities and data. *Founded* 2011 Austin, United States **$461M** last round Dec 2022 - 24 [**Demisto** Demisto Enterprise is a security operations platform that combines intelligent automation and collaboration into a single ChatOps interface.](https://millionrounds.com/company/demisto) Demisto Enterprise is a security operations platform that combines intelligent automation and collaboration into a single ChatOps interface. *Founded* 2015 United States **$450M** last round Oct 2018 - 25 [**Armadin**](https://millionrounds.com/company/armadin) *Founded* - United States **$446M** last round Oct 2026 - 26 [**ID.me**](https://millionrounds.com/company/id-me) *Founded* - United States **$444M** last round Sept 2025 - 27 [**Docker** Docker’s platform helps millions of developers efficiently and collaboratively build, share, and run applications.](https://millionrounds.com/company/docker) Docker’s platform helps millions of developers efficiently and collaboratively build, share, and run applications. *Founded* 2011 San Francisco, United States **$412M** last round Mar 2022 - 28 [**Arctic Wolf** Arctic Wolf helps companies end cyber risk by providing cloud-native security operations technology.](https://millionrounds.com/company/arctic-wolf) Arctic Wolf helps companies end cyber risk by providing cloud-native security operations technology. *Founded* 2012 Eden Prairie, United States **$401M** last round Oct 2022 - 29 [**Netskope**](https://millionrounds.com/company/netskope) *Founded* - United States **$400M** last round Sept 2024 - 30 [**Cloaked** Cloaked is a consumer-first privacy company founded in 2020 by brothers Arjun and Abhijay Bhatnagar.](https://millionrounds.com/company/cloaked) Cloaked is a consumer-first privacy company founded in 2020 by brothers Arjun and Abhijay Bhatnagar. *Founded* 2020 New York, United States **$400M** last round Mar 2026 - 31 [**Cylance** BlackBerry helps organizations defend against cyberthreats.](https://millionrounds.com/company/cylance) BlackBerry helps organizations defend against cyberthreats. *Founded* 2012 Waterloo, United States **$397M** last round Jun 2018 - 32 [**AnchorFree** AnchorFree is an internet privacy and security company based in Redwood City, California.](https://millionrounds.com/company/anchorfree) AnchorFree is an internet privacy and security company based in Redwood City, California. *Founded* 2005 Redwood City, United States **$358M** last round Sept 2018 - 33 [**BitSight** Bitsight is the global leader in cyber risk intelligence, helping teams make informed risk decisions with the industry’s most extensive external security data a](https://millionrounds.com/company/bitsight) Bitsight is the global leader in cyber risk intelligence, helping teams make informed risk decisions with the industry’s most extensive external security data a *Founded* 2011 Boston, United States **$350M** last round Sept 2021 - 34 [**Alice**](https://millionrounds.com/company/alice) *Founded* - United States **$329M** last round Oct 2026 - 35 [**Druva** Druva is the leading provider of data security solutions, empowering customers to secure and recover their data from all threats.](https://millionrounds.com/company/druva) Druva is the leading provider of data security solutions, empowering customers to secure and recover their data from all threats. *Founded* 2008 Santa Clara, United States **$328M** last round Jun 2019 - 36 [**Mosyle** Mosyle is a leading provider of Apple Mobile Device Management (MDM) and security solutions designed for enterprise and education customers.](https://millionrounds.com/company/mosyle) Mosyle is a leading provider of Apple Mobile Device Management (MDM) and security solutions designed for enterprise and education customers. *Founded* 2012 Winter Park, United States **$312M** last round Apr 2026 - 37 [**Glow**](https://millionrounds.com/company/glow) *Founded* - United States **$306M** last round Jul 2026 - 38 [**Cylake** Cylake is a cybersecurity startup founded in March 2026, focusing on AI-native, data-driven cybersecurity platforms.](https://millionrounds.com/company/cylake) Cylake is a cybersecurity startup founded in March 2026, focusing on AI-native, data-driven cybersecurity platforms. *Founded* - Sunnyvale, United States **$290M** last round Sept 2026 - 39 [**Lookout** Lookout, Inc.](https://millionrounds.com/company/lookout) Lookout, Inc. *Founded* 2007 Boston, United States **$282M** last round Feb 2015 - 40 [**SecurityScorecard** SecurityScorecard is a leader in cybersecurity ratings and third-party risk management, providing AI-driven solutions for continuous monitoring of over 12 milli](https://millionrounds.com/company/securityscorecard) SecurityScorecard is a leader in cybersecurity ratings and third-party risk management, providing AI-driven solutions for continuous monitoring of over 12 milli *Founded* 2013 New York, United States **$278M** last round Mar 2021 - 41 [**TENEX.AI** TENEX.AI is a cybersecurity company founded in 2024 and based in Sarasota, Florida, with additional offices in Overland Park and Phoenix.](https://millionrounds.com/company/tenex-ai) TENEX.AI is a cybersecurity company founded in 2024 and based in Sarasota, Florida, with additional offices in Overland Park and Phoenix. *Founded* 2024 Sarasota, United States **$277M** last round Apr 2026 - 42 [**Socure** Socure is a prominent American technology company that specializes in AI-driven digital identity verification, fraud prevention, and risk decisioning.](https://millionrounds.com/company/socure) Socure is a prominent American technology company that specializes in AI-driven digital identity verification, fraud prevention, and risk decisioning. *Founded* 2012 Incline Village, United States **$273M** last round Aug 2026 - 43 [**RADAR**](https://millionrounds.com/company/radar) *Founded* - United States **$269M** last round May 2026 - 44 [**Aura**](https://millionrounds.com/company/aura) *Founded* - United States **$264M** last round Feb 2026 - 45 [**Clumio** Clumio is a cloud-native backup-as-a-service company based in Santa Clara, California.](https://millionrounds.com/company/clumio) Clumio is a cloud-native backup-as-a-service company based in Santa Clara, California. *Founded* 1996 Tinton Falls, United States **$261M** last round Feb 2024 - 46 [**Criticalstart** Critical Start is a cybersecurity company based in Plano, Texas, founded in 2012 by Rob Davis.](https://millionrounds.com/company/criticalstart) Critical Start is a cybersecurity company based in Plano, Texas, founded in 2012 by Rob Davis. *Founded* 2012 Plano, United States **$255M** last round Apr 2022 - 47 [**ThreatLocker** ThreatLocker is a leader in Zero Trust endpoint security, providing advanced cybersecurity solutions to protect servers, endpoints, and digital environments fro](https://millionrounds.com/company/threatlocker) ThreatLocker is a leader in Zero Trust endpoint security, providing advanced cybersecurity solutions to protect servers, endpoints, and digital environments fro *Founded* 2017 Orlando, United States **$250M** last round Jul 2026 - 48 [**Horizon3** Horizon3 invest in long-term growth companies with a strong customer and user focus integrated into profitable and scalable business models.](https://millionrounds.com/company/horizon3) Horizon3 invest in long-term growth companies with a strong customer and user focus integrated into profitable and scalable business models. *Founded* 2022 United States **$250M** last round Aug 2026 - 49 [**Pindrop** Pindrop is an American cybersecurity company founded in 2011, headquartered in Atlanta, Georgia, with additional offices in London and Toronto.](https://millionrounds.com/company/pindrop) Pindrop is an American cybersecurity company founded in 2011, headquartered in Atlanta, Georgia, with additional offices in London and Toronto. *Founded* 2011 Atlanta, United States **$237M** last round Jul 2024 - 50 [**Oosto** Oosto is a global Visual AI company that specializes in real-time video analytics.](https://millionrounds.com/company/oosto) Oosto is a global Visual AI company that specializes in real-time video analytics. *Founded* 2015 New York, United States **$235M** last round Jul 2021 **Total funding** how the list is ranked **15 November 2026** updated nightly **Rounds we track** source: Millionrounds Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list. ## Who backed them? Open any company for its rounds and investors, or search the investors who back security startups in the United States in the app, with filters, lists and exports. [Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[All top lists](https://millionrounds.com/top-lists) ## More security lists [See all](https://millionrounds.com/top-lists?t=Security) [*H* *K* *V* **Security startups worldwide** 1,740 companies · $30B](https://millionrounds.com/top-lists/security-startups)[*T* *Q* *D* **Security startups in the United Kingdom** 164 companies · $3.9B](https://millionrounds.com/top-lists/security-startups-united-kingdom)[*F* *VS* *G* **Security startups in France** 59 companies · $854M](https://millionrounds.com/top-lists/security-startups-france)[*V* *1* *T* **Security startups in Canada** 41 companies · $1.4B](https://millionrounds.com/top-lists/security-startups-canada)[*I* *S* *ML* **Security startups in Germany** 27 companies · $448M](https://millionrounds.com/top-lists/security-startups-germany)[*FC* *RP* *I* **Security startups in Spain** 26 companies · $293M](https://millionrounds.com/top-lists/security-startups-spain)[*A* *S* *E* **Security startups in Switzerland** 17 companies · $294M](https://millionrounds.com/top-lists/security-startups-switzerland) ## More lists for United States [See all](https://millionrounds.com/top-lists?r=United%20States) [*O* *A* *X* **Startups in the United States** 42,176 companies · $870B](https://millionrounds.com/top-lists/startups-united-states)[*GV* *V* *RP* **Health startups in the United States** 7,411 companies · $71B](https://millionrounds.com/top-lists/health-startups-united-states)[*O* *A* *X* **AI startups in the United States** 5,656 companies · $718B](https://millionrounds.com/top-lists/ai-startups-united-states)[*V* *RP* *DH* **Healthcare startups in the United States** 4,148 companies · $51B](https://millionrounds.com/top-lists/healthcare-startups-united-states)[*S* *P* *I* **IT Services startups in the United States** 3,482 companies · $27B](https://millionrounds.com/top-lists/it-services-startups-united-states)[*D* *CE* *AD* **Big Data & Analytics startups in the United States** 2,107 companies · $132B](https://millionrounds.com/top-lists/big-data-startups-united-states)[*O* *A* *W* **AI startups in the United States that raised in 2026** 1,648 companies · $431B in 2026](https://millionrounds.com/top-lists/ai-startups-united-states-raised-2026)[*D* *P* *A* **Software startups in the United States** 1,638 companies · $77B](https://millionrounds.com/top-lists/software-startups-united-states)