Michael Tannenbaum
About Michael Tannenbaum
Michael Tannenbaum is the Chief Executive Officer and a director of Figure Technology Solutions, Inc. Public profiles say he has held that role since April 2024. He is listed as based in New York.
Before Figure he was an executive at Brex, where he served as Chief Operating Officer, Chief Financial Officer and Chief Business Officer. Earlier he was Chief Revenue Officer at SoFi Technologies and worked in investment banking at JPMorgan Chase.
Crunchbase lists 13 personal investments and 12 portfolio companies for Tannenbaum. CB Insights counts 8 investments, and Tracxn counts 7. The counts differ because each database tracks different rounds, so treat them as approximate.
Recorded rounds include the Circuit & Chisel seed round (September 2025) and the Synthetic seed round (May 2026). Crunchbase also lists a Tenet seed round and a Parcha AI pre-seed round. Tannenbaum has not published a personal investment thesis that we could find.
The AI round on the Lounge deals desk is Synthetic's $10M seed, announced in May 2026. Khosla Ventures led the round, and Basis Set Ventures also took part. Tannenbaum was one of several operator-investors, alongside Tobi Lütke, Kaz Nejatian, Zach Abrams and Cosmin Nicolaescu.
Synthetic, led by CEO Ian Crosby, is building an autonomous AI bookkeeping service for software, SaaS and AI startups. Crunchbase also shows a pre-seed investment in Parcha AI.
The recorded investments are mostly seed and pre-seed rounds, with one Series B listed by CB Insights. His operating background is in fintech, finance and operations, and the Synthetic round fits that profile. Tracxn lists his investments as spread across many sectors, including retail and consumer, and across the United States, Canada and one other country.
He has not publicly stated a check size or a preferred round size. We have left both out.
- Synthetic: autonomous AI bookkeeping for software startups. Participated in the $10M seed led by Khosla Ventures (May 2026).
- Circuit & Chisel: Crunchbase and Tracxn record a seed round on 2025-09-22.
- Parcha AI: Crunchbase lists a pre-seed round. The date is not shown publicly.
- Tenet (Tenet Computer Group): listed by Crunchbase and Tracxn as a seed investment.
- Slope, Adaptive, LootRush and Accrue Savings: named in a third-party angel database as investments. Round details are not confirmed.
- venturebeat.com/business/synthetic-raises-10m-seed-led-by-khosla-ventu
- pulse2.com/synthetic-10-million-seed-raised-for-ai-bookkeeping-platfor
- finsmes.com/2026/05/synthetic-raises-10m-in-seed-funding.html
- crunchbase.com/person/michael-tannenbaum-2
- cbinsights.com/investor/michael-tannenbaum
- tracxn.com/d/people/michael-tannenbaum/__utoiRhlMkieUP__3n4ZspLcfZAsUT
- buttondown.com/AngelRegistry/archive/angel-registry-update-may-14-2026
- boringbusinessnerd.com/investor/michael-tannenbaum
Investing activity
Michael Tannenbaum appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $10M. The most recent is Synthetic (Seed, $10M, May 2026).
Michael Tannenbaum most often invests alongside Khosla Ventures, Basis Set Ventures, Zach Abrams and Cosmin Nicolaescu, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Michael Tannenbaum
Who is Michael Tannenbaum?
He is CEO of Figure Technology Solutions and was previously COO, CFO and Chief Business Officer at Brex. He also angel invests in startups.
Has Michael Tannenbaum invested in AI startups?
Yes. He took part in Synthetic's $10M seed round in May 2026, which Khosla Ventures led. Crunchbase also lists a pre-seed investment in Parcha AI.
What stage does Michael Tannenbaum invest in?
Public databases show mostly seed and pre-seed rounds. CB Insights also lists one Series B. He has not published a formal stage preference.
What is Michael Tannenbaum's check size?
It is not public. We could not find any statement from him or a reliable source on his typical check size.
What kind of founders does Michael Tannenbaum back?
His disclosed deals include Synthetic, an AI bookkeeping company for software startups. He comes from fintech operating roles at Brex and SoFi. He has not published a thesis or criteria.
How can founders reach Michael Tannenbaum?
The only handle we found is an X account, @MBTannenbaum, which comes from an angel-tracking newsletter. We found no personal site and could not confirm a LinkedIn URL.
Is Michael Tannenbaum an angel investor?
Yes. Michael Tannenbaum invests personally as an angel.
What AI companies has Michael Tannenbaum invested in?
Michael Tannenbaum's AI investments include Synthetic. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Michael Tannenbaum invest at?
In the rounds tracked on Lounge, Michael Tannenbaum has invested at Seed, with a median round of $10M.
Who does Michael Tannenbaum co-invest with?
Michael Tannenbaum's most frequent co-investors on Lounge are Khosla Ventures (1 deal), Basis Set Ventures (1 deal), Zach Abrams (1 deal), Cosmin Nicolaescu (1 deal) and Kaz Nejatian (1 deal).