# Act Security

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/act-security

- Industry: IT Security/Cybersecurity
- Headquarters: Tel Aviv, Israel
- Website: www.act.security
- Total disclosed funding: $60M
- Latest round: Series A (Dec 29, 2025)
- Investors on record: 6

## About

Act Security Ltd. is a cybersecurity startup founded by Jonathan Langer, Itay Kirshenbaum, Stephen Goldberg, and Ilai Fallach in 2025. In December 2025, Act Security Ltd. raised USD 40 million in series A funding led by new investor Notable Capital, with participation from another new investors StartPoint. Returning investors Bessemer Venture Partners, Team8 Capital, Hetz Ventures, and Brightmind Partners also participated in the round. As of August 2025, the company is operating in stealth mode.
The company aims to develop advanced cloud security tools that empower enterprise security teams to proactively manage and mitigate risks.

## Funding rounds

- Series A, Dec 29, 2025, $40M — Bessemer Venture Partners, Team8 Capital, Hetz Ventures, StartPoint, Notable Capital, Brightmind Partners
- Seed, Aug 11, 2025, $20M — Bessemer Venture Partners, Team8 Capital, Hetz Ventures, Brightmind Partners

## Investors

- Bessemer Venture Partners (https://capitalatlas.ai/funds/bessemer-venture-partners) — Seed, Series A
- Team8 Capital (https://capitalatlas.ai/funds/team8-capital) — Seed, Series A
- Hetz Ventures (https://capitalatlas.ai/funds/hetz-ventures) — Seed, Series A
- Brightmind Partners (https://capitalatlas.ai/funds/brightmind-partners) — Seed, Series A
- StartPoint — Series A
- Notable Capital (https://capitalatlas.ai/funds/notable-capital) — Series A