Michael Brehm
About Michael Brehm
Michael Brehm has worked as an entrepreneur and investor in the startup ecosystem for more than 20 years. His LinkedIn profile says he was Managing Partner at studiVZ, once one of Europe's largest social networks. He later founded companies including Rebate Networks and the speech analytics startup i2x.
He founded i2x, a Berlin AI company that provides real-time speech analysis and coaching for conversations. Crunchbase lists him as its founder and managing director from 2017, and i2x's site now lists him as founder and advisory board member. He is also Founder and General Partner of the European VC firm Redstone, which LinkedIn says manages around €600 million in assets and has invested in more than 200 companies.
He studied business at WHU in Germany and EGADE in Mexico, and also studied at CEIBS in China, according to PitchBook.
LinkedIn says Brehm has backed more than 100 startups as an angel, including Lieferando, Kreditech, MrSpex, kaufDa and Brands4Friends. i2x's site describes him as a business angel in some of Europe's largest technology companies for over 15 years. Crunchbase lists 22 personal investments, and Tracxn lists 11. The two counts differ, so treat them as partial.
Brehm took part in the €6 million seed round of mika, a Berlin vertical AI company, announced on 23 September 2026. Smedvig Ventures led the round. mika builds AI-native bookkeeping, VAT pre-returns, annual financial statements and tax returns for small GmbHs and UGs. The company says more than 750 companies use it. On LinkedIn, Brehm said he joined mika as an investor and knows its CEO personally.
He also founded i2x, an AI company, as described above.
Brehm invests mostly in Germany and nearby European markets. An aggregator, Shizune, lists his deals as Seed, Angel and Series A, in Germany, Italy and Austria. Tracxn shows his recorded rounds in sectors such as enterprise applications and retail. Of Redstone, he has said on LinkedIn that he focuses on specialized investment strategies and data-driven investment decisions. He has also spoken about helping European clean and deep-tech companies keep more of their value in Europe. His personal check size is not public.
- mika: Berlin AI-native bookkeeping and tax service for small businesses. Seed round of €6M, September 2026.
- Cobrainer: Series A in November 2021, per Tracxn, with Redstone among the co-investors.
- Atheneum: Series C in August 2021, per Tracxn. Crunchbase also lists him as a co-founder of Atheneum Partners.
- Kreditech: named on LinkedIn among his angel investments.
- Lieferando: named on LinkedIn among his angel investments.
- kaufDA: named on LinkedIn among his angel investments. Tracxn dates his start in the startup ecosystem to 2009 through kaufDA.
- Teleclinic: listed by Tracxn as a notable investment.
- getmika.de/en/press/seed-funding-6m
- linkedin.com/in/michaelbrehm
- i2x.ai/en/about-us/management
- crunchbase.com/person/michael-brehm
- pitchbook.com/profiles/investor/105957-55
- tracxn.com/d/people/michael-brehm/__Gfof0u5MX9ORZkPoO1LOBJtQKmW3N3pHDi
- shizune.co/investors/artificial-intelligence-angel-investors-germany
Investing activity
Michael Brehm appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $7M. The most recent is mika (Seed, €6M, Sep 2026).
Michael Brehm most often invests alongside Smedvig Ventures, Dutch Founders Fund, Johannes Ditterich and Keen Venture Partners, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Michael Brehm
Does Michael Brehm invest in AI startups?
Yes. He took part in the €6M seed round of the Berlin AI company mika, announced in September 2026. He also founded the AI company i2x.
What stage does Michael Brehm invest in?
Aggregator data lists Seed, Angel and Series A deals. Tracxn also shows later rounds such as Atheneum's Series C in 2021.
What is Michael Brehm's check size?
His personal check size is not public. Round sizes in his recorded deals range from about $197k to $12M, according to Shizune. That range is the size of the rounds, not his own cheque.
What is Michael Brehm's relationship with Redstone?
He is Founder and General Partner of Redstone, a European VC firm. LinkedIn says it manages around €600 million and has invested in more than 200 companies.
Where is Michael Brehm based and which markets does he back?
LinkedIn lists him in Munich, Germany. His recorded investments are mostly in Germany, with some in Italy and Austria.
How can founders reach Michael Brehm?
He is active on LinkedIn, where he posts about his investments and Redstone. No personal website or X account was found.
Is Michael Brehm an angel investor?
Yes. Michael Brehm invests personally as an angel.
What AI companies has Michael Brehm invested in?
Michael Brehm's AI investments include mika. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Michael Brehm invest at?
In the rounds tracked on Lounge, Michael Brehm has invested at Seed, with a median round of $7M.
Who does Michael Brehm co-invest with?
Michael Brehm's most frequent co-investors on Lounge are Smedvig Ventures (1 deal), Dutch Founders Fund (1 deal), Johannes Ditterich (1 deal), Keen Venture Partners (1 deal) and Wecken & Cie (1 deal).