Sector portfolio · VC firm · United Kingdom
Index Ventures' Cybersecurity portfolio
Index Ventures has backed 18 Cybersecurity startups in rounds we track, $1.7B between them, shown by the stage each has reached. The best-funded is Lookout.
Funding by segment
- Series C and later$1.1B8
- Series B$266M4
- Stage not reported$223M4
- Series A$91M2
Where they are based
- United States13$1.3B
- Ireland1$140M
- Vatican City1$99M
- United Kingdom1$90M
United States
Ireland
Vatican City
United KingdomFounded
3 without a founding year on record.
Total raised
- Under $1M0
- $1M to $10M0
- $10M to $50M4
- $50M to $250M12
- $250M to $1B2
- $1B and over0
Each dot is a startup: the year it was founded across, the total it has raised up (each line is ten times the one below). Pick a segment to pick it out.
15 of 18 startups shown; the rest have no founding year or amount on record.
- 1 to 2
- 3 to 7
- 8 to 24
- 25 to 99
- 100 and more
- United States13
- Ireland1
- Vatican City1
- United Kingdom1
Startups by country, 4 countries in all.
Segment by segment
Series C and later
8 startups · $1.1B raised
LookoutLookout, Inc.United States$282M
ClumioClumio is a cloud-native backup-as-a-service company based in Santa Clara, California.United States$261M
Sublime SecuritySublime Security is an adaptive, AI-powered cloud email security platform founded in 2019 in Washington, DC.United States$150M
TinesTines is a no-code security automation and intelligent workflow platform founded in 2018 in Dublin, Ireland.Ireland$140M
ExpelExpel is a leading Managed Detection and Response (MDR) provider based in Herndon, Virginia.Vatican City$99M
MimecastMimecast is a SaaS-based email management platform enabling companies to administer business communications and data.United Kingdom$90M
AttackIQAttackIQ® is trusted by top organizations worldwide to validate security controls in real time.United States$70M
Signal SciencesSignal Sciences is a cloud-based web application security company based in Culver City, California.United States$52M
Series B
4 startups · $266M raised
Linx SecurityLinx Security is a privately held cybersecurity company founded in 2023 and based in New York, New York.United States$83M
CipherCloudCipherCloud is a cloud security company that provides a platform that delivers data protection, compliance, and control.United States$80M
Brinc DronesBRINC Drones is an American technology company based in Seattle, founded in 2017 and incorporated in 2019.United States$75M
EvervaultEvervault is a Dublin-based cybersecurity and data infrastructure company founded in 2019.United States$28M
Stage not reported
4 startups · $223M raised
Duo SecurityDuo Security is a software company that provides network security software products and services.United States$120M
DazzDazz delivers unified security remediation across code, clouds, infrastructure, and applications for security and development teams.United States$50M
CoalitionCO.ALITIONTM is a Colorado based company that designs some of the most elegant, functional and timeless urban packs around and theUnited States$40M- NNotionUnited States$13M
Series A
2 startups · $91M raised
- SC[Stealth Cybersecurity Startup]-$55M
- DDuna-$36M
How this map is made. Every startup here works in Cybersecurity and has raised money in a round we track that names Index Ventures as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026.
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