Hornetsecurity is a managed email security services company, headquartered in Hanover, United States, founded in 2007.
| Date | Round | Amount | Investors |
|---|---|---|---|
| 2020-07-28 | Growth Stage | Undisclosed | PSG Equity |
| 2019-01-08 | Series B | Undisclosed | Undisclosed |
| 2017-10-27 | Growth Stage | Undisclosed | Undisclosed |
| 2016-09-27 | Growth Stage | Undisclosed | Undisclosed |
| 2010-06-01 | Growth Stage | Undisclosed | Undisclosed |
| 2009-07-07 | Growth Stage | Undisclosed | Undisclosed |
| 2008-04-01 | Growth Stage | Undisclosed | Undisclosed |
| 2007-01-01 | Seed | Undisclosed | Undisclosed |
Hornetsecurity was acquired by Proofpoint (2025-05-12).
| Date | Company | Amount |
|---|---|---|
| 2025-04-01 | Altospam | Undisclosed |
| 2024-03-04 | Vade Secure | Undisclosed |
| 2022-05-23 | IT-Seal | Undisclosed |
Data from The Signal by Return on Security — cybersecurity funding, M&A activity, and company intelligence.