# SYN Ventures' Cybersecurity Investments: 10 Startups in Its Portfolio (2026) > The 10 Cybersecurity startups SYN Ventures has backed, by stage: $238M raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/syn-ventures-cybersecurity-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Series A 6 - [iCOUNTER](https://millionrounds.com/company/icounter) - [Opsin](https://millionrounds.com/company/opsin) - [SquareX](https://millionrounds.com/company/squarex) - [P0 Security](https://millionrounds.com/company/p0-security) - [BreachRx](https://millionrounds.com/company/breachrx) - [Metabase Q](https://millionrounds.com/company/metabase-q) ## Series B 2 - [Adlumin](https://millionrounds.com/company/adlumin) - [SecZetta](https://millionrounds.com/company/seczetta) ## Stage not reported 2 - [*SS* Sevco Security](https://millionrounds.com/company/sevco-security) - [Terra Security](https://millionrounds.com/company/terra-security) ## Segment by segment ### Series A 6 startups · $112M raised - [**iCOUNTER**](https://millionrounds.com/company/icounter) iCOUNTER is a Dallas-based cyber risk intelligence company that specializes in precision threat intelligence. United States $30M - [**Opsin**](https://millionrounds.com/company/opsin) Opsin is a GenAI and enterprise AI security company based in San Jose, California, founded in 2024. United States $21M - [**SquareX**](https://millionrounds.com/company/squarex) SquareX helps organisations detect, mitigate and threat-hunt web attacks happening against their users in real-time. United States $20M - [**P0 Security**](https://millionrounds.com/company/p0-security) P0 Security is a cybersecurity company based in San Francisco, founded in 2022. United States $15M - [**BreachRx**](https://millionrounds.com/company/breachrx) BreachRx is a cybersecurity company based in San Francisco, California, founded in 2020. United States $15M - [**Metabase Q**](https://millionrounds.com/company/metabase-q) Metabase Q is a provider of cybersecurity solutions aimed at minimizing security risks by employing agile and inventive technologies. United States $11M ### Series B 2 startups · $101M raised - [**Adlumin**](https://millionrounds.com/company/adlumin) Adlumin provides an enterprise-grade security operations platform that keeps mid-market organizations secure. United States $70M - [**SecZetta**](https://millionrounds.com/company/seczetta) SecZetta providea product for managing 3rd party identity risk United States $31M ### Stage not reported 2 startups · $25M raised - [*SS* **Sevco Security**](https://millionrounds.com/company/sevco-security) Sevco Security is an IT asset visibility and cybersecurity company providing a unified asset intelligence platform. United States $17M - [**Terra Security**](https://millionrounds.com/company/terra-security) Terra Security is a cybersecurity company founded in 2024, specializing in an Agentic-AI-powered platform for continuous offensive security. United States $8.0M **How this map is made.** Every startup here works in Cybersecurity and has raised money in a round we track that names SYN Ventures 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 **Techstars' AI portfolio** 336 startups · $4.9B](https://millionrounds.com/portfolio-maps/techstars-ai-portfolio)[Sector portfolio **Alumni Ventures' AI portfolio** 302 startups · $36B](https://millionrounds.com/portfolio-maps/us-strategic-tech-fund-an-alumni-ventures-fund-ai-portfolio)[Sector portfolio **Andreessen Horowitz's AI portfolio** 259 startups · $426B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-ai-portfolio)[Sector portfolio **General Catalyst's AI portfolio** 226 startups · $179B](https://millionrounds.com/portfolio-maps/general-catalyst-ai-portfolio)[Sector portfolio **Sequoia Capital's AI portfolio** 209 startups · $543B](https://millionrounds.com/portfolio-maps/sequoia-capital-ai-portfolio)[Sector portfolio **Khosla Ventures' AI portfolio** 176 startups · $251B](https://millionrounds.com/portfolio-maps/khosla-ventures-ai-portfolio) ## Raising from investors like SYN Ventures? Find the investors who back startups like yours, with their cheques, rounds and partners, in the app with filters, lists and exports. [Find investors](https://millionrounds.com/login?join=1&next=/app/investors)[Market maps](https://millionrounds.com/market-maps)