7 VC firms investing in security & cybersecurity and legal & regtech at the Series B stage.
F4 Fund tracks 7 VC firms that actively invest in security & cybersecurity + legal & regtech at the Series B stage, with check sizes ranging from $100K – $60M (median: $15.5M – $15.5M). As of July 2026, and 100% lead or co-lead rounds. Rankings are based on F4's proprietary analysis of 1,477+ researched VC firms, scored by data completeness, portfolio depth, investment recency, and stage alignment.
| # | Firm | Check Size | Portfolio | Leads? | Activity | Decision | Intro |
|---|---|---|---|---|---|---|---|
| 1 | ▶ SYN Ventures Cybersecurity needs constant innovation to stay ahead of adversaries. SYN invests in transformational (not incremental) solutions that significantly reduce technology risk — from the earliest stages through Series B — leveraging a team of former Fortune 500 CISOs, CEOs, and founders with 400+ combined years of security experience. West Palm Beach, FL | $1M – $30M | 40 | Leads | Active | — | — |
| 2 | ▶ Elad Gil Invest in market-creating companies with exceptional founders and large addressable markets. Prioritize market size and dynamics, then evaluate product-market fit through personal usage test. Focus on founder quality and execution capability over other factors. San Francisco | $250K – $50M | 39 | Leads | Active | ~2 wks | Open |
| 3 | ▶ Accel Partner with exceptional teams building transformative technology companies across all stages San Francisco | $2M – $10M | 127 | Both | Active | — | — |
| 4 | ▶ MissionOG Operator-led growth investor backing high-growth B2B technology companies driving digitization in fintech, data, and AI-driven technologies, especially proprietary data, regulated workflows, and infrastructure layers that AI agents need to call into. Philadelphia | $5M – $10M | 28 | Both | Active | ~1 mo | — |
| 5 | ▶ Redpoint Depth-first venture investing through mastery in specific domains. We partner with bold builders challenging industry conventions, backing founders with technical depth and conviction to build enduring $1B+ companies. Complete immersion creates enduring companies. Menlo Park | $500K – $50M | 18 | Leads | Active | ~2 wks | Open |
| 6 | ▶ Icehouse Ventures Back exceptional Kiwi founders building globally transformative companies, from day one to IPO. New Zealand founders represent a significantly undervalued asset class, and Icehouse provides capital plus an ecosystem of 3,000+ investors and deep operational support. Auckland | $100K – $10M | 41 | Leads | Active | ~2 mo | Open |
| 7 | ▶ Evantic Capital At the intersection of generational talent and transformative artificial intelligence. Evantic backs exceptional founders building AI-first B2B software, infrastructure, and platform businesses with the potential to become global market leaders. London | $1M – $60M | 10 | Both | Active | — | — |
What other stages do these firms also invest in?
Investors on this page also frequently invest in these sectors
What other sectors do these firms also invest in?
F4 Fund tracks 7 VC firms that actively invest in security & cybersecurity + legal & regtech at the Series B stage. These firms are ranked using a composite score that weighs data completeness (30%), portfolio depth (30%), investment recency (25%), and stage alignment (15%).
Based on F4's analysis, the median check size for series b security & cybersecurity + legal & regtech investors is $15.5M – $15.5M, with a full range from $100K – $60M. The distribution breaks down as: 3 firms in the $5M-$10M range, 4 firms in the $10M+ range.
Among the 7 firms tracked, 100% lead or co-lead rounds. Founders seeking a lead investor should filter for firms marked "Leads" or "Both" in the rankings table above. Lead investors typically set deal terms and anchor the round.
The best series b security & cybersecurity + legal & regtech investors combine domain expertise with an active portfolio in the space. Among these firms, 0% prefer warm introductions, and the average firm has 43 portfolio companies. Look for firms whose check size matches your raise, whose stage preference aligns with yours, and who have a track record of supporting companies in your sector through multiple growth phases.
Firm profiles are continuously updated through F4's research pipeline, which combines LLM-powered web research, portfolio analysis, and transcript extraction. The ranking data refreshes every 12 hours. Editorial analysis is reviewed weekly. Individual firm profiles are re-researched on a 30-day cycle or when new information surfaces.