Topic
Investment trend tracking seed-to-growth funding rounds for cybersecurity startups, including round sizes and sector patterns.
Cybersecurity startups raised $6.8 billion in Q3 2026, up about 50% on the prior quarter, according to Crunchbase data. At least 18 AI-linked companies raised $100 million or more while round counts fell at every stage.
Reality
Rein Security raised a $25 million Series A to monitor and block what enterprise AI agents do in production. Its stated $35 million total sits $2 million above the two rounds it has disclosed, so its other figures need checking before buyers rely on them.
Perspective Coverage
9 publishersReality
Fleuret AI raised EUR 4 million in a pre-seed round led by RAISE Ventures to automate penetration testing with AI agents. The money backs a bet that NIS2's demand for demonstrable security will move buyers from periodic audits to tests that rerun whenever their systems change.
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Amsterdam's Hadrian raised $40 million, bringing its total funding to $65 million, to sell exposure monitoring and AI-run penetration tests as one platform. For the security team asked to buy it, the case comes down to sorting real flaws from scanner noise, and almost every number behind that case comes from Hadrian.
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8 publishersReality
Kevin Mandia's Armadin raised $255.5 million at a valuation above $2.5 billion, bringing its total to $445 million seven months after launch. Its case against periodic pen tests rests on performance data from an exercise Armadin ran with a partner.
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6 publishersReality
Kevin Mandia's AI cybersecurity startup Armadin raised a $255.5 million Series B at a valuation above $2.5 billion. Security teams comparing its AI agents with periodic human pentests have only Armadin's own platform figures to go on.
Perspective Coverage
3 publishersReality
Armadin, the AI attack-testing startup run by Mandiant founder Kevin Mandia, raised $255.5 million at a valuation above $2.5 billion. Investors are betting that always-on AI agents will take over the budget companies now spend on periodic penetration tests.
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6 publishersReality
Rome's Exein says its valuation is up thirtyfold in two years and first-half recurring revenue up fourfold, and its first foundation models are due in the first quarter of 2027, two quarters after the round closed.
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4 publishersReality
The EUR2.1m pre-seed is roughly 0.16% of what 360 Capital and PranaVentures manage between them - a check sized to option a research method, before Bynario has a finished security platform to bet on.
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Sequoia and Greenoaks led the round for a 40-person company founded in February, which makes the priced asset a research library showing 6.7 million installs of add-ons that fetch their instructions from sources nobody vetted.
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The flag rate on US-based remote IT roles climbed from 11% in the third quarter of 2024 to an estimated 47%, which prices candidate verification into every application even as venture money for identity startups fell to $0.3bn in a quarter.
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Huskeys closed $27m five months after leaving stealth, with Blackstone leading what Globes calls the firm's first early-stage cybersecurity round. The cheque is worth about 0.002% of its assets.
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3 publishersReality
Island raised $400 million at a $6.4 billion valuation, about 32 times the roughly $200 million in revenue Calcalist reported. Since the March 2025 round the price has risen by a third while sales doubled, so each dollar of revenue now costs investors less than it did.
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3 publishersReality
Cyera has raised $1.4 billion this year, close to 70 percent of everything it has taken in since 2021, and says the latest tranche funds agent-security products and a push into US federal buyers.
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The Series B takes MIND to $112 million raised against a $10 million run rate, and Crosspoint supplied about half of it. The $300 million price assumes Eran Barak hits $100 million of revenue within two years.
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3 publishersReality
Mind Security's Series B funds a product with two controls: block the risky action, or prompt the person who triggered it with the policy they were about to break. Agent traffic under a service account leaves only the block.
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Forgepoint led the Lyon company's round, taking total funding to $38 million, under half what each of its two Palo Alto rivals has raised, into a market where 99% of one AI preview's 10,000 critical findings sat unpatched.
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Kevin Mandia joined Amazon's board on 8 September and takes two committee seats, including the security one a retired NSA director left in May. His day job is an AI startup that attacks corporate networks.
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Formerly CYTRIX, the company says more than 25 agents exploit, rank, route and then retest customer systems continuously. The accuracy and growth figures are self-reported, and the 0.1% false-positive rate comes without a sample or a period.
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The Twistlock founders raised thirteen to seventeen times the cybersecurity seed norm, then binned the product it funded. The pivot is the most useful part of the story.
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