# Top 14 Cybersecurity Startups in Sunnyvale by Funding (2026)

> The 14 best-funded cybersecurity startups in Sunnyvale, ranked by total funding raised: $1.4B combined.

Source: https://millionrounds.com/top-lists/cybersecurity-startups-sunnyvale (Millionrounds; every figure on the page links to its filing or article)

- 1 [**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
- 2 [**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
- 3 [**SafeBreach** SafeBreach is a cybersecurity company founded in 2014, known for pioneering the Breach and Attack Simulation (BAS) category.](https://millionrounds.com/company/safebreach) SafeBreach is a cybersecurity company founded in 2014, known for pioneering the Breach and Attack Simulation (BAS) category. *Founded* 2014 Sunnyvale, United States **$88M** last round Nov 2021
- 4 [**Straiker** Straiker is an AI security company based in Sunnyvale, California, founded in 2024.](https://millionrounds.com/company/straiker) Straiker is an AI security company based in Sunnyvale, California, founded in 2024. *Founded* 2024 Sunnyvale, United States **$85M** last round Jun 2026
- 5 [**Proofpoint** We provide the most effective cybersecurity and compliance solutions to protect people on every channel including email, the web, the cloud, and social media.](https://millionrounds.com/company/proofpoint) We provide the most effective cybersecurity and compliance solutions to protect people on every channel including email, the web, the cloud, and social media. *Founded* 2002 Sunnyvale, United States **$79M** last round Feb 2008
- 6 [**Jumio** Jumio is an AI platform that enables users to establish their identity remotely to protect against fraud and other financial crime.](https://millionrounds.com/company/jumio) Jumio is an AI platform that enables users to establish their identity remotely to protect against fraud and other financial crime. *Founded* 2010 Sunnyvale, United States **$52M** last round Aug 2016
- 7 [**Coram AI** Coram AI is an AI-native physical security platform that integrates video surveillance, access control, and emergency response into a single system.](https://millionrounds.com/company/coram-ai) Coram AI is an AI-native physical security platform that integrates video surveillance, access control, and emergency response into a single system. *Founded* 2022 Sunnyvale, United States **$49M** last round Jun 2026
- 8 [**Stairwell** Stairwell is a cybersecurity company founded in 2019 and based in Sunnyvale, California.](https://millionrounds.com/company/stairwell) Stairwell is a cybersecurity company founded in 2019 and based in Sunnyvale, California. *Founded* 2019 Sunnyvale, United States **$45M** last round Oct 2022
- 9 [**RapidFort** RAPIDFORT is a cybersecurity company based in Sunnyvale, California, specializing in Software Supply Chain Security and Software Attack Surface Management (SASM).](https://millionrounds.com/company/rapidfort) RAPIDFORT is a cybersecurity company based in Sunnyvale, California, specializing in Software Supply Chain Security and Software Attack Surface Management (SASM). *Founded* 2020 Sunnyvale, United States **$42M** last round Feb 2026
- 10 [**Decru** Decru was a storage security company based in Redwood City, California, founded in 2001.](https://millionrounds.com/company/decru) Decru was a storage security company based in Redwood City, California, founded in 2001. *Founded* - Sunnyvale, United States **$40M** last round Aug 2002
- 11 [**BlueFlag Security** BlueFlag Security is an identity-based developer security company founded in 2022 and based in Sunnyvale, California.](https://millionrounds.com/company/blueflag-security) BlueFlag Security is an identity-based developer security company founded in 2022 and based in Sunnyvale, California. *Founded* 2022 Sunnyvale, United States **$24M** last round Mar 2026
- 12 [**Identity Engines**](https://millionrounds.com/company/identity-engines) *Founded* - Sunnyvale, United States **$22M** last round May 2006
- 13 [**Armorblox** Armorblox uses deep learning and natural language technologies to protect enterprise communications.](https://millionrounds.com/company/armorblox) Armorblox uses deep learning and natural language technologies to protect enterprise communications. *Founded* 2017 Sunnyvale, United States **$17M** last round Sept 2022
- 14 [**Aurva** Aurva is an AI-powered data security platform designed for high-scale enterprises and cloud-first organizations.](https://millionrounds.com/company/aurva) Aurva is an AI-powered data security platform designed for high-scale enterprises and cloud-first organizations. *Founded* 2023 Sunnyvale, United States **$2.1M** last round Apr 2023

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed in 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 cybersecurity startups in Sunnyvale 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 cybersecurity lists

[See all](https://millionrounds.com/top-lists?t=Cybersecurity)

[*H* *K* *V* **Cybersecurity startups in the United States** 1,085 companies · $29B](https://millionrounds.com/top-lists/cybersecurity-startups-united-states)[*T* *Q* *E* **Cybersecurity startups in Europe** 405 companies · $5.7B](https://millionrounds.com/top-lists/cybersecurity-startups-europe)[*H* *K* *F* **Cybersecurity startups that raised in 2026** 262 companies · $13B in 2026](https://millionrounds.com/top-lists/cybersecurity-startups-raised-2026)[*T* *Q* *D* **Cybersecurity startups in the United Kingdom** 164 companies · $3.9B](https://millionrounds.com/top-lists/cybersecurity-startups-united-kingdom)[*D* *C* *C* **Cybersecurity startups in San Francisco** 112 companies · $4.0B](https://millionrounds.com/top-lists/cybersecurity-startups-san-francisco)[*H* *I* *C* **Cybersecurity startups founded in 2020** 96 companies · $4.7B](https://millionrounds.com/top-lists/cybersecurity-startups-founded-2020)[*C* *Q* *F* **Cybersecurity startups founded in 2021** 92 companies · $3.3B](https://millionrounds.com/top-lists/cybersecurity-startups-founded-2021)[*QC* *E* *T* **Cybersecurity startups founded in 2018** 89 companies · $2.4B](https://millionrounds.com/top-lists/cybersecurity-startups-founded-2018)

## More lists for Sunnyvale

[See all](https://millionrounds.com/top-lists?r=Sunnyvale)

[*CS* *AI* *I* **Startups in Sunnyvale** 183 companies · $8.8B](https://millionrounds.com/top-lists/startups-sunnyvale)[*CS* *AI* *C* **AI startups in Sunnyvale** 35 companies · $4.9B](https://millionrounds.com/top-lists/ai-startups-sunnyvale)[*X* *A* *C* **IT Services startups in Sunnyvale** 25 companies · $280M](https://millionrounds.com/top-lists/it-services-startups-sunnyvale)[*J* *R* *P* **Software startups in Sunnyvale** 15 companies · $395M](https://millionrounds.com/top-lists/software-startups-sunnyvale)[*C* *C* *BF* **Big Data & Analytics startups in Sunnyvale** 14 companies · $1.4B](https://millionrounds.com/top-lists/big-data-startups-sunnyvale)[*SR* *V* *S* **Healthcare startups in Sunnyvale** 12 companies · $562M](https://millionrounds.com/top-lists/healthcare-startups-sunnyvale)[*SR* *V* *SM* **Biotech startups in Sunnyvale** 11 companies · $512M](https://millionrounds.com/top-lists/biotech-startups-sunnyvale)