Company record
Harmonic Security
Updated November 2, 2026 · Presspool
Harmonic Security governs how a workforce uses AI: it detects shadow AI, prevents data leaks and coaches employees across web, desktop and agentic workflows. harmonic.security
Funding
- $50 million Series B, announced October 14, 2026. Led by Crosspoint Capital Partners. Oversubscribed; existing investors participated; total raised $76 million. Listed in the AI startup funding roster for October 12–17, 2026. Sources: SiliconANGLE, BankInfoSecurity.
Of the 33 Series B rounds with exactly stated amounts in dollars on Presspool's weekly rosters since September 21, 2026, Harmonic Security's $50 million is the joint 19th largest; their median is $55 million.
Whether AI names Harmonic Security
- On the AI security map: named or cited in 3 of 51 answers to Presspool's AI security questions on November 2, 2026 (ChatGPT 2 of 8, Claude 0 of 8, Perplexity 1 of 8, Gemini 0 of 8, Copilot 0 of 8, Google AI Mode 0 of 8, Google AI Overviews 0 of 3). See the map. Of the 16 companies on the map, Harmonic Security ranked joint 11th by answers naming or citing it in that sample. The other companies AI names most on AI security questions: HiddenLayer (25 of 51), Zenity (21 of 51), Mindgard (17 of 51), Noma Security (14 of 51) and Pillar Security (9 of 51). Most often named in the same answers: HiddenLayer (2), Rein (2), Zenity (2), Lasso Security (1), Mindgard (1).
- Machine Relations Index: Cited in 4 Machine Relations Index answers, May 10, 2026 to October 24, 2026.
Week by week
Answers that named or cited Harmonic Security in each weekly sample of Presspool's AI security questions, by the Monday of the sample week. A row is added every week.
| Week of | AI security |
|---|---|
| October 19, 2026 | 2 of 53 |
| October 26, 2026 | 1 of 55 |
| November 2, 2026 | 3 of 51 |
Sources AI cites when it names Harmonic Security
Presspool asked its 8 AI security questions on November 2, 2026; 3 of the 51 answers named or cited Harmonic Security, on ChatGPT and Perplexity. The sites those 3 answers cited most:
- calcalistech.com: 2 of 3 answers
- dealroom.co: 2 of 3 answers
- openai.com: 2 of 3 answers
- securitystartups.com: 2 of 3 answers
- crn.com: 1 of 3 answers
- crunchbase.com: 1 of 3 answers
- hiddenlayer.com: 1 of 3 answers
- prnewswire.com: 1 of 3 answers
- prompt.security: 1 of 3 answers
- reuters.com: 1 of 3 answers
Related records
Also on the AI security map: Giskard, HiddenLayer, Kontext, Lasso Security, Mindgard, Noma Security, Opsin, Outerlimit, Palma.ai, Pillar Security, Reco, Rein and 3 more on the map.
Closest rounds in the roster for October 12–17, 2026: Scarlet ($50 million Series B, October 12, 2026), Albert Invent ($55 million Series B, October 13, 2026), North ($60 million Series B, October 15, 2026), RapidCanvas ($29 million Series B, October 16, 2026), Salience Labs ($125 million Series B, October 14, 2026), Reach Security (more than $50 million Series B, October 13, 2026).