Background & Biography
Samadi’s route into crypto began outside the industry. Greenfield’s official biography identifies him as the former chief executive and co-founder of apprupt, a mobile advertising platform, and records a master’s degree in law from the University of Hamburg. Contemporary reporting by deutsche-startups documented Opera Mediaworks’ acquisition of apprupt in April 2014. The transaction places his earlier work in the commercial infrastructure of mobile publishing and advertising, before his later involvement in blockchain networks.
In 2017, according to Greenfield, he helped co-found Flux, a cross-chain oracle project. That experience is relevant to the part of crypto concerned with getting usable information into blockchain applications. It also distinguishes his background from a career spent exclusively selecting financial assets. The available evidence supports a founding contribution; it does not establish that Samadi personally wrote the protocol’s code or remains its operational leader.
Samadi and Sebastian Blum founded Greenfield One in 2018, with the first investment vehicle launched in early 2019. The firm now presents itself as Greenfield Capital. Its legal adviser YPOG’s historical account and contemporaneous EU-Startups reporting independently establish the founding partnership and early fund development. These sources describe a business investing in developer teams and crypto networks, rather than a retail trading platform.
Germany is his documented professional market. His public professional profile identifies Berlin and lists his work at Greenfield there; the manager’s registered address is separately in Hamburg. That distinction matters because investment firms can operate across several locations without every partner being based at their legal headquarters. The profile therefore uses a German professional association and a broader European and international investment context without making a claim about citizenship or private residence.
Notable Contributions
One measurable milestone in Greenfield’s development was the third fund announced in 2021. YPOG, which advised on its structuring, recorded a completed raise of approximately US$160 million, or €135 million, and named institutional and corporate backers including Swisscom and CommerzVentures. EU-Startups reported the closing in November that year. This is evidence of the organization’s ability to assemble a specialist crypto investment vehicle, rather than a measure of Samadi’s personal assets or an indication of investment returns.
Individual investment commentary gives a clearer view of his priorities than a portfolio list alone. EtherMail’s August 2022 announcement identified Greenfield One and Fabric Ventures as leaders of its US$3 million seed round and included Samadi’s explanation of the potential for wallet-linked communications. He emphasized ways for projects to communicate with their users and token holders through blockchain-linked information. The episode illustrates his interest in the services around networks and applications, while the fundraising release remains a statement by the investee about its plans at that time.
Samadi also co-authored Greenfield’s October 2025 explanation of its investment in peaq with Anies Khan. The article connected the investment to application-specific networks and economic activity involving connected devices, and reported that Greenfield Labs operated a validator. The documented contribution here is both the investment thesis he helped articulate and the firm’s disclosed operational participation. The article’s predictions about a future machine economy should be read as an investor thesis, not as established demand or guaranteed commercial adoption.
His 2026 research provides a more direct record of analytical work. In July, Samadi and Christoph Rosenmayr published an introduction to Ethereum’s block-building market, explaining the path from submitted transactions through builders and validators. Their focus included execution quality, transaction positioning, fees and the different incentives of users and intermediaries. For a public profile, authorship is a concrete contribution: the work makes a complicated market structure more accessible while exposing the questions Greenfield considers relevant to investment research.
In September 2026, Samadi published a separate essay arguing that the economic value attached to transaction ordering persists across different market architectures. He compared public blockchains with permissioned networks and familiar financial-market arrangements. This is his analytical position, not a protocol rule or a settled conclusion endorsed by all researchers. Its significance is the move from asking whether ordering value exists to examining who can observe it, compete for it and receive it.
Why Katharos.ai Follows Jascha Samadi
Katharos.ai follows Samadi because his public record connects three activities that are often discussed separately: building technology companies, financing early crypto teams and examining how blockchain markets work. The 2014 acquisition, Greenfield’s formation and his recent research establish those connections through identifiable events and publications. They provide a more useful basis for coverage than broad claims that any investor is responsible for the growth of an entire ecosystem.
His writing also creates a basis for testing investment narratives over time. Greenfield’s 2019 summit brought founders, investors and financial-infrastructure participants into a shared discussion, while his more recent work examines the incentives inside transaction markets. Katharos.ai’s editorial interest is in how those ideas develop and how disclosed activity relates to them. Public explanations are useful evidence, but the firm’s commercial interests remain relevant context when assessing its account of a portfolio company or sector.
Areas to Follow
- Further research on transaction ordering, builder competition and the allocation of execution value. - Disclosed changes in Greenfield’s investment strategy, with completed fundraisings distinguished from targets. - Evidence of useful applications and sustained participation in networks discussed in Samadi’s investment writing. - The relationship between Greenfield Labs’ technical activity and the investment firm’s public theses. - Contributions to European founder and investor discussions that produce identifiable research or practical outcomes.
Reporting Scope
Coverage concerns Samadi’s public professional work, attributed statements and documented company history. Portfolio investments and network operations belong to the relevant Greenfield entities and teams; they are not automatically personal holdings or individual engineering achievements. Historical funding amounts are dated, and forward-looking claims remain attributed to their authors. The profile does not estimate wealth, assess private fund performance, recommend investments or infer personal circumstances from business records.
Areas of Influence
Investment & Founders is the primary category, reflecting his founding role at Greenfield and earlier entrepreneurial work. Exchanges & Infrastructure captures the subject of his research and the networks his firm supports, without describing him as an exchange operator. Community, Media & Education reflects his explanatory publications and participation in professional discussion. Across these categories, influence is understood as documented involvement in financing and interpretation, rather than control over the networks or companies discussed.
Katharos.ai publishes this profile for information, based on the sources listed. Inclusion is not an endorsement of the individual, their organizations, or any investment product.
Source notice: Information and images are attributed to the external sources listed. Katharos.ai does not endorse the subjects or claims described and does not independently certify the authenticity of every source statement or image.