Xavier Buck
Angel Investor
Leudelange, Luxembourg
Xavier Buck is a seed investor in Leudelange focused on Marketplace and SaaS. Xavier Buck is the Founder and Chairman of Namespace Group. He previously worked at DomainTools as a Board Member.
- Total investments:
- 5
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Xavier Buck invests in
Stages Xavier Buck invests in
Countries Xavier Buck invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $133k–$1.7M
Investment Focus
Industry
- Marketplace 2 (40%)
- SaaS 1 (20%)
- Events 1 (20%)
- Farming 1 (20%)
- Software 1 (20%)
Stage
- Seed 2 (40%)
- Angel 1 (20%)
- Series A 1 (20%)
- Convertible Note 1 (20%)
Country
- Luxembourg 3 (60%)
- Bulgaria 1 (20%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Passbolt is an open source password manager designed for the needs of Agile and DevOps teams. It is better because it is: highly collaborative, interoperable (Open API), open source, based on standards (PGP). Passbolt can be used in the cloud or on-prem for maximum data ownership. | $8M / Series A / Jan 23, 2025 | ||
| Reply to emails in seconds using hyperautomation! EmailTree AI comes as an end-to-end solution to increase email productivity, automate email composition and trigger automatic actions in databases. NLP/NLU, ML and RPA techniques allow spending considerably less time for customer services and support teams when managing emails or other textinputs. | $1.7M / Seed / Feb 26, 2021 | ||
| Farmia is online livestock marketplace that helps farmers to offer their animals to a wider circle of potential buyers and to do that in best moment to achieve maximum profit and provide buyers faster cheaper and easier way to find appropriate animals for their needs.Farmia is the fastest growing livestock marketplace in the world. We are No.1online livestock marketplace in the world with operations in US, Germany, Serbia, Croatia, Bosnia, Montenegro and Macedonia. Our user base count more than 80.000 farmers who actively trade through our platform. Up to now we sold more than 200.000 animals through 15000+ transactions which value is more than 25M+ Euro. | $46.8K / Convertible Note / Jul 01, 2016 | ||
| Farmia is online livestock marketplace that helps farmers to offer their animals to a wider circle of potential buyers and to do that in best moment to achieve maximum profit and provide buyers faster cheaper and easier way to find appropriate animals for their needs.Farmia is the fastest growing livestock marketplace in the world. We are No.1online livestock marketplace in the world with operations in US, Germany, Serbia, Croatia, Bosnia, Montenegro and Macedonia. Our user base count more than 80.000 farmers who actively trade through our platform. Up to now we sold more than 200.000 animals through 15000+ transactions which value is more than 25M+ Euro. | $133K / Seed / Aug 01, 2015 | ||
| Sponsor-My-Event.com is the platform that matches organizers with sponsors by automatically filtering incoming events according to criteria predefined by sponsors. Only those events that are truly interesting are shown to the sponsorSponsor-My-Event makes sponsoring the most rewarding and streamlined experience by using the idea of matchmakingto connect the right organizers with the right sponsors. | $285.3K / Angel / Feb 17, 2015 |
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FAQ
What does Xavier Buck invest in?
Xavier Buck invests primarily in Marketplace, SaaS and Events startups, most often at Seed and Angel stage. Most of the 5 investments tracked by Shizune back companies in Luxembourg. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Xavier Buck's check size?
Xavier Buck typically joins rounds of $133k–$1.7M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Xavier Buck participates in.
How do I contact Xavier Buck?
Public channels for Xavier Buck include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Xavier Buck last invest?
The most recent investment recorded for Xavier Buck closed in Jan 2025. Shizune tracks 5 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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