Security Startups

Company directory

11 companies. Sorted by name. No paid boost.

A

Action1

Houston, USA

  • Bootstrapped
  • Founded 2016

Cloud-native patch management that remediates endpoints without a VPN or on-prem console.

H1 2026 ARR from six-figure deals grew 275% year over year

C

Conceal

Augusta, USA

  • Series B
  • $36M raised
  • Founded 2012

Browser-native SSE that gives zero-trust access without a VPN, VDI, or backhauled proxy.

Raised $26M Series B led by Two Bear Capital, October 2025

Cynet

Boston, USA

  • Series C
  • $79M raised
  • Founded 2014

All-in-one XDR agent for teams that cannot staff a SOC or buy seven point products.

Named Leader and Outperformer in the 2026 GigaOm Radar for XDR

E

Exein

Rome, Italy

  • Founded 2018

Runtime security built into the firmware of connected devices, robots, and other physical AI, plus build-time firmware analysis mapped to the EU CRA.

Raised $270M at a $1.7B valuation in a round led by Headline, September 2026

F

Fleet

San Francisco, USA

  • Series B
  • $52M raised
  • Founded 2020

Open-source osquery control plane for Mac, Windows, Linux, and phones, cloud or self-hosted.

Raised $27M Series B led by Ten Eleven Ventures, June 2025

G

Glow

Tel Aviv, Israel

  • Series B
  • $180M raised
  • Founded 2025

AI agents that inventory everything running on employee devices, judge it against company policy, and remove or block what fails.

Emerged from stealth with $180M across seed, Series A, and a Series B led by Sequoia, Cyberstarts, Greenoaks, and Redpoint, July 2026

Guardio

Tel Aviv, Israel

  • Series B
  • $127M raised
  • Founded 2018

Consumer browser protection that treats everyday users like they deserve an enterprise SOC.

Raised $80M Series B led by ION Crossover Partners, November 2025

H

HarfangLab

Paris, France

  • Series A
  • $33M raised
  • Founded 2018

ANSSI-certified French EDR for buyers who cannot put a US cloud agent on sensitive endpoints.

Added Attack Surface Management to its endpoint platform, September 2025

K

Keep Aware

Austin, USA

  • Seed
  • $2.4M raised
  • Founded 2022

Browser detection and response that watches behavior inside existing Chrome and Edge sessions.

Published The State of Browser Security Report 2026 from production telemetry

T

ThreatLocker

Orlando, USA

  • Series F
  • $480M raised
  • Founded 2017

Default-deny allowlisting that stops unapproved software and AI agents from running at all.

Raised $190M Series F led by Elephant, July 2026

V

Vicarius

New York, USA

  • Series B
  • $60M raised
  • Founded 2016

Vulnerability remediation that actually patches, not another scanner that files tickets.

Named in Forrester's Q1 2026 Proactive Security Platforms Landscape