How much did Manifold raise in its Seed?

Manifold raised $8M in a Seed announced on 18 March 2026.

Who invested in Manifold's Seed?

The round was led by Costanoa Ventures, Cherry Ventures, Rain Capital, Modern Technical Fund.

What does Manifold do?

Manifold is a cybersecurity company specializing in AI Security, founded in 2025 and headquartered in San Diego, United States.

Funding record · 2026 / 03

Manifold raises $8M Seed for AI security

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

Manifold, an AI security company based in San Diego, United States, raised $8M in a Seed announced on 18 March 2026, led by Costanoa Ventures, Cherry Ventures and Rain Capital with one other. Its disclosed equity funding is now $8M across 1 round.

Amount: $8M
Round: Seed
Announced: 18 March 2026
Lead investors: Costanoa Ventures, Cherry Ventures, Rain Capital, Modern Technical Fund
Sources on record: 1securityweek.com

From the source

Manifold Announces $8 Million Seed Funding Round to Secure Autonomous Endpoint AI Agents at Runtime

Manifold Security announced an $8 million seed funding round led by Costanoa Ventures to develop its AI detection and response platform for securing autonomous AI agents on enterprise endpoints. The round also included participation from Cherry Ventures, Rain Capital, Modern Technical Fund, and notable angel investors including former Uber CSO Joe Sullivan and former Google DeepMind CISO Vijay Bolina. The funding will support development of Manifold's platform, which detects and responds to runtime behavior of AI agents with access to source code, production systems, and CI/CD pipelines.

securityweek.com · 18 March 2026 ↗

The Mandos read

What the record says about Manifold

25 employees · up 9% 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 Manifold with Geordie AI and Ntur AIlocked →
the full set in the platform

Funding history

Manifold funding on record

Manifold has raised $8M in priced equity. Its most recent round was a Seed in March 2026.

Latest round on record: Seed, Mar 2026.

Manifold funding on the profile →

In the platform

The round is the fact. The read is the product.

Every round, investor and correction for Manifold, 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 Manifold raise in its Seed?: Manifold raised $8M in a Seed announced on 18 March 2026.
Who invested in Manifold's Seed?: The round was led by Costanoa Ventures, Cherry Ventures, Rain Capital, Modern Technical Fund.
What does Manifold do?: Manifold is a cybersecurity company specializing in AI Security, founded in 2025 and headquartered in San Diego, United States.