Bee Partners
About Bee Partners
PitchBook lists Bee Partners as founded in 2011 and based at 50 Osgood Place in San Francisco. ZoomInfo gives 2009, so the founding year is not settled across sources. Crunchbase names Michael Berolzheimer as founder and managing partner, and Tim Smith as partner for portfolio operations, a role he holds alongside a past role as founder and principal of Applied Design Group. Crunchbase lists four funds for the firm, and records a fund raise dated September 2019 for Bee Partners III. PitchBook profiles Bee Partners I as a 2011 vintage fund. Public sources reviewed do not give fund sizes, so none are listed here.
Bee Partners describes its work as pre-seed deep tech investing, with a focus on founders building AI/ML, robotics, automation and synthetic biology. PitchBook records C-Infinity (March 2026) and FeltSense (August 2025) among its deals, and names AnyBio and General Robotics as earlier investments. Sources reviewed do not name the partners who lead the AI deals, so none are named as leads here.
The firm says it writes founders their first check, which places it at the pre-seed stage. Lounge tags the firm for Seed and Pre-Seed rounds. The sources reviewed do not publish check sizes, so none are listed.
- C-Infinity: Seed round of $16M (2026-04) per the Lounge deals desk; PitchBook classifies it under multimedia and design software.
- Feltsense Holdings: Seed round of $5.1M (2026-02) per the Lounge deals desk; PitchBook lists it under software development applications, dated August 2025.
- AnyBio: named by PitchBook as a Bee Partners investment; round details not disclosed in the sources reviewed.
- General Robotics: named by PitchBook as a Bee Partners investment; round details not disclosed in the sources reviewed.
Investing activity
Bee Partners has made 148 investments according to Crunchbase across 99 portfolio companies, and has led 33 rounds and seen 25 exits, 1 of them by IPO.
Bee Partners appears in 2 AI deals tracked by the AI Lounge deals desk, rounds totalling $16M. The rounds are mostly Seed, with a median round size of $16M. The most recent are C-Infinity (Seed, $16M, Apr 2026) and Feltsense Holdings (Seed, $5.1M, Feb 2026).
Bee Partners most often invests alongside Canaan Partners, Radius Capital, Inventus Capital Partners and Draper Associates, and the companies it backs on AI Lounge are mostly in AI.
Deals
Frequently asked questions about Bee Partners
Who founded Bee Partners?
Crunchbase names Michael Berolzheimer as founder and managing partner of Bee Partners. PitchBook dates the firm's founding to 2011, while ZoomInfo gives 2009.
Where is Bee Partners based?
Bee Partners is based in San Francisco, California. PitchBook lists its office at 50 Osgood Place, Suite 220A.
Does Bee Partners invest in AI startups at the pre-seed stage?
Bee Partners describes itself as a pre-seed deep tech firm that writes founders their first check, including founders in AI/ML. Recent AI rounds on Lounge include a $5.1M Seed for Feltsense and a $16M Seed for C-Infinity.
How many companies are in the Bee Partners portfolio?
PitchBook lists 39 portfolio companies and 155 investments for Bee Partners. Figures change over time, so check PitchBook for the current count.
How many funds does Bee Partners manage?
Crunchbase lists four funds for Bee Partners. PitchBook profiles fund vehicles including Bee Partners I and Bee Partners III, but public fund sizes were not found.
What AI companies has Bee Partners invested in?
Bee Partners's AI investments include C-Infinity and Feltsense Holdings. The 2 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
What stage does Bee Partners invest at?
In the rounds tracked on AI Lounge, Bee Partners has invested at Seed, with a median round of $16M.
Who does Bee Partners co-invest with?
Bee Partners's most frequent co-investors on AI Lounge are Canaan Partners (1 deal), Radius Capital (1 deal), Inventus Capital Partners (1 deal), Draper Associates (1 deal) and Liquid 2 Ventures (1 deal).
How can founders reach Bee Partners?
Founders on AI Lounge can see Bee Partners's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Bee Partners to their Investor Pipeline to track the conversation.