# Greylock's Cybersecurity Investments: 19 Startups in Its Portfolio (2026) > The 19 Cybersecurity startups Greylock has backed, by stage: $2.0B raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/greylock-partners-cybersecurity-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Series C and later 11 - [*U* Upwind](https://millionrounds.com/company/upwind) - [Lookout](https://millionrounds.com/company/lookout) - [Obsidian Security](https://millionrounds.com/company/obsidian-security) - [Censys](https://millionrounds.com/company/censys) - [Agari](https://millionrounds.com/company/agari) - [Skyhigh Networks](https://millionrounds.com/company/skyhigh-networks) - [*AN* Avi Networks](https://millionrounds.com/company/avi-networks) - [OpenDNS](https://millionrounds.com/company/opendns) - [Imperva](https://millionrounds.com/company/imperva) - [*S* Skyhigh](https://millionrounds.com/company/skyhigh) - [Arista NDR](https://millionrounds.com/company/arista-ndr) ## Stage not reported 4 - [Dazz](https://millionrounds.com/company/dazz) - [*D* Decru](https://millionrounds.com/company/decru) - [*AS* Awake Security](https://millionrounds.com/company/awake-security) - [Kangaroo](https://millionrounds.com/company/kangaroo) ## Series A 2 - [Abnormal Security](https://millionrounds.com/company/abnormal-security) - [Sqreen](https://millionrounds.com/company/sqreen) ## Series B 2 - [Apiiro](https://millionrounds.com/company/apiiro) - [Opal Security](https://millionrounds.com/company/opal-security) ## Segment by segment ### Series C and later 11 startups · $1.7B raised - [*U* **Upwind**](https://millionrounds.com/company/upwind) United States $750M - [**Lookout**](https://millionrounds.com/company/lookout) Lookout, Inc. United States $282M - [**Obsidian Security**](https://millionrounds.com/company/obsidian-security) Obsidian Security is a cybersecurity company founded in 2017, specializing in comprehensive security solutions for SaaS and enterp United States $191M - [**Censys**](https://millionrounds.com/company/censys) Censys provides an internet intelligence platform for threat hunting and exposure management. United States $93M - [**Agari**](https://millionrounds.com/company/agari) Agari is a cloud-native email security platform based in Foster City, California. United States $85M - [**Skyhigh Networks**](https://millionrounds.com/company/skyhigh-networks) Manage shadow IT and securely enable sanctioned IT with unparalleled cloud visibility, threat detection, and policy enforcement. United States $73M - [*AN* **Avi Networks**](https://millionrounds.com/company/avi-networks) Avi Networks is a cloud application services platform that offers software load balancer, web application, and API security solutions. United States $60M - [**OpenDNS**](https://millionrounds.com/company/opendns) OpenDNS is a provider of Internet security and Domain Name System services for homes and businesses. United States $51M ### Stage not reported 4 startups · $135M raised - [**Dazz**](https://millionrounds.com/company/dazz) Dazz delivers unified security remediation across code, clouds, infrastructure, and applications for security and development teams. United States $50M - [*D* **Decru**](https://millionrounds.com/company/decru) Decru was a storage security company based in Redwood City, California, founded in 2001. United States $40M - [*AS* **Awake Security**](https://millionrounds.com/company/awake-security) United States $30M - [**Kangaroo**](https://millionrounds.com/company/kangaroo) Kangaroo is a New York-based entertainment company that develops NFT-based storytelling video games. United States $15M ### Series A 2 startups · $38M raised - [**Abnormal Security**](https://millionrounds.com/company/abnormal-security) Abnormal Security is an email security company that protects enterprises and organizations from targeted email attacks. United States $24M - [**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 ### Series B 2 startups · $145M raised - [**Apiiro**](https://millionrounds.com/company/apiiro) Apiiro is a cybersecurity company focused on protecting AI-driven development environments. United States $100M - [**Opal Security**](https://millionrounds.com/company/opal-security) Opal Security is an AI-native access governance and identity security platform founded in 2020 and based in San Francisco, California. United States $45M **How this map is made.** Every startup here works in Cybersecurity and has raised money in a round we track that names Greylock 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 **Greylock's AI portfolio** 63 startups · $13B](https://millionrounds.com/portfolio-maps/greylock-partners-ai-portfolio)[Sector portfolio **Greylock's IT Services portfolio** 26 startups · $1.2B](https://millionrounds.com/portfolio-maps/greylock-partners-it-services-portfolio)[Sector portfolio **Greylock's Software portfolio** 17 startups · $1.1B](https://millionrounds.com/portfolio-maps/greylock-partners-software-portfolio)[Sector portfolio **Greylock's Fintech portfolio** 16 startups · $2.4B](https://millionrounds.com/portfolio-maps/greylock-partners-fintech-portfolio)[Sector portfolio **Greylock's Internet portfolio** 16 startups · $4.8B](https://millionrounds.com/portfolio-maps/greylock-partners-internet-portfolio)[Sector portfolio **Greylock's Big Data & Analytics portfolio** 12 startups · $1.1B](https://millionrounds.com/portfolio-maps/greylock-partners-big-data-analytics-portfolio) ## Raising from investors like Greylock? 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