Martin Koehler
About Martin Koehler
PitchBook lists Martin Koehler as an active individual angel investor. The profile says he is actively seeking new investments. It gives no employer, career history or companies he has built or run.
The name is common, and no source we found ties this investor to a specific past role. We have left out any career details we could not confirm.
PitchBook records one investment for Martin Koehler: telli, dated 23 July 2026. It does not list a deal size, deal type or lead partner for him. We found no public record of earlier angel investments, exits or a total number of investments.
His one confirmed AI investment is telli's seed round. Seedtable reports that telli is a Berlin startup building AI agents for customer-facing operations at B2C companies. It announced a EUR 13.1M (about $15M) seed round on 23 July 2026, led by Redalpine. Mutschler Ventures and unnamed angels took part, as did existing investors Cherry Ventures and Y Combinator.
The sources we found do not say how much Martin Koehler invested. They also do not say whether he is one of the unnamed angels in the announcement.
There are no public statements from Martin Koehler on stage, sector, geography or check size, so none are given here. His one recorded investment is a seed-stage AI software company in Germany that already generates revenue. One deal is too little to infer a focus from.
- telli: Berlin company building AI voice agents for pre-sales outreach and customer operations at B2C companies. Seed round of EUR 13.1M announced July 2026, led by Redalpine.
Investing activity
Martin Koehler appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $15M. The rounds are mostly Seed, with a median round size of $15M. The most recent is telli (Seed, $15M (EUR 13.1M), Jul 2026).
Martin Koehler most often invests alongside redalpine, SPACING, Mutschler and Krischan Moeller, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Martin Koehler
Who is Martin Koehler, the angel investor?
PitchBook lists him as an active individual angel investor with one recorded investment, in telli. We found no public biography, so his professional background is not confirmed.
Did Martin Koehler invest in telli?
Yes. PitchBook lists telli as his investment, dated 23 July 2026, the date of telli's EUR 13.1M seed round. The amount he invested is not public.
What check size does Martin Koehler write?
It is not public. We found no statement from him or reported figure for his check size.
What stage and sectors does Martin Koehler invest in?
He has no stated focus. His one recorded deal is a seed-stage AI company building agents for customer operations.
How can founders contact Martin Koehler?
We found no verified LinkedIn, X or personal website for him. Founders can ask for an introduction through telli's team or through shared contacts.
Is Martin Koehler an angel investor?
Yes. Martin Koehler invests personally as an angel.
What AI companies has Martin Koehler invested in?
Martin Koehler's AI investments include telli. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Martin Koehler invest at?
In the rounds tracked on Lounge, Martin Koehler has invested at Seed, with a median round of $15M.
Who does Martin Koehler co-invest with?
Martin Koehler's most frequent co-investors on Lounge are redalpine (1 deal), SPACING (1 deal), Mutschler (1 deal), Krischan Moeller (1 deal) and Mutschler Ventures AG (1 deal).
How can founders reach Martin Koehler?
Founders on Lounge can see Martin Koehler's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Martin Koehler to their Investor Pipeline to track the conversation.