How much did Depthfirst raise in its Series B?

Depthfirst raised $80M in a Series B announced on 31 March 2026.

Who invested in Depthfirst's Series B?

The round was led by Meritech Capital Partners, Accel, Alt Capital, BoxGroup, Forerunner, Liquid 2 Ventures, MANTIS Venture Capital, The House Fund.

What does Depthfirst do?

Depthfirst is a cybersecurity company specializing in Application Security, founded in 2024 and headquartered in San Francisco, United States.

Funding record · 2026 / 03

Depthfirst raises $80M Series B for application security

Announced 31 March 2026 · Recorded 8 September 2026 · Last verified 8 September 2026

Depthfirst, an application security company based in San Francisco, United States, raised $80M in a Series B announced on 31 March 2026, led by Meritech Capital Partners, Accel and Alt Capital with 5 others. Its disclosed equity funding is now $120M across 2 rounds.

Amount: $80M
Round: Series B
Announced: 31 March 2026
Lead investors: Meritech Capital Partners, Accel, Alt Capital, BoxGroup, Forerunner, Liquid 2 Ventures, MANTIS Venture Capital, The House Fund
Sources on record: 1forbes.com

From the source

Meet The $580 Million Startup Making AI Models To Fight Artificial Hackers

Depthfirst, an applied AI lab focused on securing software systems, announced an $80 million Series B funding round at a $580 million post-money valuation. The round was led by Meritech Capital. This follows a $40 million Series A round announced two months prior. The company, founded in 2024 by Andrea Michi (ex-Google DeepMind), Daniele Perito (ex-Block cybersecurity chief), and a third cofounder, is launching its first in-house AI model (dfs-mini1) for detecting vulnerabilities in crypto smart contracts.

forbes.com · 27 March 2026 ↗

The Mandos read

What the record says about Depthfirst

Momentum 77 / 100 · Acceleratinglocked →
pillars in the platform
42 employees · up 5% last month · 11 open roleslocked →
history and breakdowns in the platform
Exit Readiness: Lowlocked →
Tested against 751 past exits in the Mandos record: 43% sat in Watch or Elevated 2 years before. Companies in Elevated exited at 3.1× the record's rate.
Buyers most often compare Depthfirst with Aikido Securitylocked →
the full set in the platform

Funding history

Depthfirst funding on record

Depthfirst has raised $120M in priced equity. Its most recent round was a Series B in March 2026.

Latest round on record: Series B, Mar 2026.

Depthfirst funding on the profile →

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How much did Depthfirst raise in its Series B?: Depthfirst raised $80M in a Series B announced on 31 March 2026.
Who invested in Depthfirst's Series B?: The round was led by Meritech Capital Partners, Accel, Alt Capital, BoxGroup, Forerunner, Liquid 2 Ventures, MANTIS Venture Capital, The House Fund.
What does Depthfirst do?: Depthfirst is a cybersecurity company specializing in Application Security, founded in 2024 and headquartered in San Francisco, United States.