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Cyber startup Bay raises $37M in Series A led by Battery Ventures. The AI agent security platform will use funds to expand its 35-person team across product, engineering, sales, and marketing.

RECENTLY ACQUIREDNov 11, 2026

Amount Raised

$37 Million

Round Type

Series A

San Francisco

Investors

Manoj ApteJeetu PatelAssaf RappaportStrikerYL VenturesMicron VenturesBattery Ventures

Description

Bay, a cyber startup focused on securing AI agents, has completed a $37 million Series A funding round led by Battery Ventures, with participation from Micron Ventures. The round brings the company's total investment to $50 million since its founding nine months ago. The company plans to use the funding to expand its 35-person workforce, with focus on product, engineering, sales, marketing, and customer teams in the US and Europe. Bay's platform monitors AI agent actions in real time and decides whether to allow, block, or escalate actions based on organizational security policies.

Quick answer

At-Bay raised $37 Million in a Series A round, dated November 11, 2026. Investors: Manoj Apte, Jeetu Patel, Assaf Rappaport, Striker, YL Ventures, Micron Ventures and Battery Ventures. At-Bay is based in San Francisco, California, United States.

How much did At-Bay raise?
At-Bay raised $37 Million in a Series A round on November 11, 2026.
Who invested in At-Bay?
Manoj Apte, Jeetu Patel, Assaf Rappaport, Striker, YL Ventures, Micron Ventures and Battery Ventures are named as investors in this round.
What does At-Bay do?
At-Bay is the insurance company for the digital age.
Where is At-Bay based and how big is it?
At-Bay is based in San Francisco, California, United States.
Who are the decision-makers at At-Bay?
Fundz holds 2 contacts at At-Bay, including the Founder. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

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Company Information

Company

At-Bay

Location

San Francisco, California, United States

About

At-Bay is the insurance company for the digital age. By combining world-class technology with industry-leading insurance expertise, we designed an insurance company from the ground up that empowers businesses to thrive in the digital world. As a Managing General Underwriter (MGU), At-Bay underwrites insurance policies through HSB Specialty Insurance Company, rated A++ by A.M. Best Company and part of Munich Re. At-Bay is backed by Acrew Capital, the HSB fund of Munich Re Ventures, Icon Ventures, Khosla Ventures, Lightspeed Venture Partners, M12, entrepreneur Shlomo Kramer, and Qumra Capital. www.at-bay.com

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Fundz sees it the moment At-Bay raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

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2 contacts
Verified contactsMichael D., FounderSee plans and pricing
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Funding Insights

What this usually means
Typical timeline to Series B
Series A companies typically raise their next round in 10-18 months

At-Bay 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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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.