Ten Eleven Ventures
About Ten Eleven Ventures
Cybersecurity-focused venture firm.
Alex Doll and Mark Hatfield founded Ten Eleven in 2014. Most sources give that year, though one directory says 2015. Doll is Founder and Managing General Partner. Crunchbase lists his earlier roles as CEO of OneID, and another profile says his ArcSight experience shaped the firm. Hatfield is Co-Founder and General Partner. Scott Lundgren joined as Operating Partner and CTO. In 2016 the firm closed two funds totalling $103.7M: a $77.49M venture fund and a $26.245M growth fund. Doll later announced that Fund 3 closed at $600M. Third-party listings put assets under management above $1B. The firm lists offices in Silicon Valley, Boston and Boulder, and Crunchbase gives Burlingame, California as its location. The firm has not publicly named a partner who leads AI investing specifically.
Ten Eleven invests only in cybersecurity, so its AI investing is about securing AI systems and the identities and data around them. HiddenLayer is covered by TechCrunch as securing enterprise AI deployments. Rig Security builds identity protection for human, machine and AI-agent identities. A third-party profile says the firm prioritizes defending AI, but the firm does not state this itself. In 2026 the firm co-led Rig Security's $12M seed with Brightmind Partners, and Lounge records it as leading Bloom Security's $20M seed. The firm's portfolio page also lists Blackbird.AI.
The firm describes itself as global and stage agnostic, and third-party directories list seed through growth. Ten Eleven has not published a check size range. Directories such as Endeavor, VC Sheet and NFX Signal report $3M to $15M, while another aggregator lists $1M to $10M. Treat these as estimates. The firm invests only in cybersecurity.
- HiddenLayer: AI security company; $100M Series B, September 2026.
- Bloom Security: emerged from stealth with a $20M Seed, July 2026; Lounge records Ten Eleven as lead.
- Rig Security: identity protection for human, non-human and AI-agent identities; $12M Seed co-led with Brightmind Partners, September 2026.
- Harmonic Security: $50M Series B, October 2026.
- Guardare: $5.6M Seed, October 2026.
- Blackbird.AI: listed on the firm's portfolio page; round not confirmed.
- 1011vc.com/portfolio
- 1011vc.com/news/why-we-invested-in-rig-security
- x.com/1011vc
- crunchbase.com/organization/ten-eleven-ventures
- finsmes.com/2016/09/teneleven-closes-two-cybersecurity-venture-capital
- linkedin.com/posts/adoll_ten-eleven-ventures-raises-third-generation-a
- endeavorcolorado.org/investors/ten-eleven-ventures
- vcsheet.com/fund/ten-eleven-ventures
Investing activity
Ten Eleven Ventures appears in 6 AI deals tracked by the AI Lounge deals desk, rounds totalling $182M, and led 3 of them. The rounds are mostly Seed and Series B, with a median round size of $20M and the largest at $100M. The most recent are Harmonic Security (Series B, $50M, Oct 2026), Guardare (Seed, $5.6M, Oct 2026) and Rig Security (Seed, $12M, Sep 2026).
Ten Eleven Ventures most often invests alongside Crosspoint Capital, Next47, Album VC and DeepWork Capital, and the companies it backs on AI Lounge are mostly in AI, AI security / data protection and AI security.
Deals
Frequently asked questions about Ten Eleven Ventures
Does Ten Eleven Ventures invest in AI startups?
Yes, where the company is a cybersecurity company. Recent AI-related rounds include HiddenLayer's $100M Series B, Bloom Security's $20M seed and Rig Security's $12M seed.
What check size does Ten Eleven Ventures write?
The firm does not publish one. Third-party directories estimate $3M to $15M, and some list lower ranges.
Who founded Ten Eleven Ventures?
Alex Doll and Mark Hatfield founded it in 2014. It is described as the first VC firm dedicated exclusively to cybersecurity.
Does Ten Eleven Ventures invest at seed stage?
Yes. It is stage agnostic, and it co-led Rig Security's $12M seed round in September 2026.
How large are Ten Eleven Ventures' funds?
Fund 3 closed at $600M, and 2016 funds totalled $103.7M. Third-party sources put assets under management above $1B.
What AI companies has Ten Eleven Ventures invested in?
Ten Eleven Ventures's AI investments include Harmonic Security, Guardare, Rig Security, Furl, HiddenLayer and Bloom Security. The 6 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Ten Eleven Ventures based?
Ten Eleven Ventures is based in San Francisco, US.
What stage does Ten Eleven Ventures invest at?
In the rounds tracked on AI Lounge, Ten Eleven Ventures has invested at Seed and Series B, with a median round of $20M. Ten Eleven Ventures led 3 of those rounds.
Who does Ten Eleven Ventures co-invest with?
Ten Eleven Ventures's most frequent co-investors on AI Lounge are Crosspoint Capital (1 deal), Next47 (1 deal), Album VC (1 deal), DeepWork Capital (1 deal) and Tampa Bay Ventures (1 deal).
How can founders reach Ten Eleven Ventures?
Founders on AI Lounge can see Ten Eleven Ventures's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Ten Eleven Ventures to their Investor Pipeline to track the conversation.