Nebulock raises $25 million in Series A funding led by FirstMark to bolster its AI-native security platform for Fortune 500 customers.
Amount Raised
$25 Million
Round Type
Series A
BostonSoftwareArtificial IntelligenceSecurityMachine LearningInvestors
Description
Nebulock, the AI-native contextual security platform, has announced it raised $25 million in Series A financing led by FirstMark. This funding will help expand its security operations platform, addressing the evolving threat of agentic attacks. Nebulock has gained trust from Fortune 500 enterprises and has performed over 300 million investigations to enhance cybersecurity. The successful funding reflects the company's rapid momentum since emerging from stealth less than a year ago.
Quick answer
Nebulock raised $25 Million in a Series A round, dated June 25, 2026. Investors: FirstMark Capital, Bain Capital Ventures, Decibel, Zetta Venture Partners and Step Function. Nebulock is based in Boston, Massachusetts, United States.
- How much did Nebulock raise?
- Nebulock raised $25 Million in a Series A round on June 25, 2026.
- Who invested in Nebulock?
- FirstMark Capital, Bain Capital Ventures, Decibel, Zetta Venture Partners and Step Function are named as investors in this round.
- What does Nebulock do?
- Nebulock is the first agentic threat hunting platform; autonomously surfacing behaviors, not just IOCs, from your existing data.
- Where is Nebulock based and how big is it?
- Nebulock is based in Boston, Massachusetts, United States.
- Who are the decision-makers at Nebulock?
- Fundz holds 3 contacts at Nebulock, including the Head of Talent. Names and contact details are shown to Fundz members.
Source: Fundz verified event record.
Who else raised in Security and Software around the same time
Companies in the same sectors as Nebulock that raised within 45 days of this round, from Fundz verified event records.
- Above Security raised an undisclosed amount (Corporate Round) on August 4, 2026.
- Ent raised $100M (Seed) on June 16, 2026.
- Oplane raised $5.2M (Seed) on June 2, 2026.
- Exaforce raised $125M (Series B) on May 12, 2026.
- ai-horizon.io raised an undisclosed amount (Pre-Series A) on August 9, 2026.
- Tennsa raised $61K (Seed) on August 7, 2026.
Who to call at Nebulock, and when
A new round usually means Nebulock is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Nebulock raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Nebulock, from your own LinkedIn network
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Fundz sees it the moment Nebulock raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.
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Funding Insights
What this usually meansNebulock raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.
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