How much did RunSybil raise in its Seed?

RunSybil raised $40M in a Seed announced on 18 March 2026.

Who invested in RunSybil's Seed?

The round was led by Khosla Ventures, Anthology Fund, Elad Gil, Jeff Dean, Nikesh Arora, S32, Conviction.

What does RunSybil do?

RunSybil is a cybersecurity company specializing in Attack Surface, founded in 2023 and headquartered in San Francisco, United States.

Funding record · 2026 / 03

RunSybil raises $40M Seed for attack surface

Announced 18 March 2026 · Recorded 8 September 2026 · Last verified 8 September 2026

RunSybil, an attack surface company based in San Francisco, United States, raised $40M in a Seed announced on 18 March 2026, led by Khosla Ventures, Anthology Fund and Elad Gil with 4 others. Its disclosed equity funding is now $40M across 1 round.

Amount: $40M
Round: Seed
Announced: 18 March 2026
Lead investors: Khosla Ventures, Anthology Fund, Elad Gil, Jeff Dean, Nikesh Arora, S32, Conviction
Sources on record: 1finance.yahoo.com

From the source

Exclusive: AI cybersecurity startup RunSybil, founded by OpenAI's first security hire, raises $40 million led by Khosla Ventures

RunSybil, an AI cybersecurity startup founded by Ari Herbert-Voss (OpenAI's first security hire), has secured $40 million in Series A funding led by Khosla Ventures. The company uses AI agents to automatically conduct penetration tests and find security vulnerabilities in live applications. RunSybil currently works with startups including Cursor, Turbopuffer, Notion, Baseten, and Thinking Machines Lab, as well as several major financial institutions and Fortune 500 companies.

finance.yahoo.com · 17 March 2026 ↗

The Mandos read

What the record says about RunSybil

Momentum 58 / 100 · Steadylocked →
pillars in the platform
20 employees · up 17% last monthlocked →
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 RunSybil with SafeHilllocked →
the full set in the platform

Funding history

RunSybil funding on record

RunSybil has raised $40M in priced equity. Its most recent round was a Seed in March 2026.

Latest round on record: Seed, Mar 2026.

RunSybil funding on the profile →

In the platform

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Every round, investor and correction for RunSybil, the competitors buyers weigh it against, hiring by department, and an alert when the next thing happens.

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FAQ

Questions people ask

How much did RunSybil raise in its Seed?: RunSybil raised $40M in a Seed announced on 18 March 2026.
Who invested in RunSybil's Seed?: The round was led by Khosla Ventures, Anthology Fund, Elad Gil, Jeff Dean, Nikesh Arora, S32, Conviction.
What does RunSybil do?: RunSybil is a cybersecurity company specializing in Attack Surface, founded in 2023 and headquartered in San Francisco, United States.