John Tsioris
Angel Investor
Dubai, United Arab Emirates
John Tsioris is a pre-seed investor in Dubai focused on Information Technology and SaaS. John Tsioris is based out of Dubai and is the Founder and CEO of Re18. John previously worked at InstaShop as a Founder and CEO. John Tsioris attended the Technical University of Crete.
- Total investments:
- 6
- Last investment:
- Lead investor:
- 17%
Last updated:
For AI agents: llms.txt
Industries John Tsioris invests in
Stages John Tsioris invests in
Countries John Tsioris invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $156k–$2.6M
- Pre-Seed
- $169k–$2.2M
Investment Focus
Industry
- Information Technology 2 (33%)
- SaaS 1 (17%)
- Travel 1 (17%)
- Farming 1 (17%)
- Internet 1 (17%)
Stage
- Pre-Seed 3 (50%)
- Seed 2 (33%)
- Series A 1 (17%)
Country
- Greece 3 (50%)
- Estonia 1 (17%)
- United Arab Emirates 1 (17%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Neurohive develops the AI brain of sheep & goat farms to track livestock health and improve farm management through decision intelligence. | $156.1K / Seed / Jan 22, 2025 | ||
|
Butler.gr
|
$169.1K / Pre-Seed / Nov 13, 2024 | ||
| Relik is a UAE-based authentication platform that uses AI, visual recognition, and blockchain-backed verification to authenticate collectibles, luxury goods, artwork, and cultural assets. The platform creates tamper-resistant digital identities for physical items without using chips, tags, or holograms, enabling users to verify authenticity throughsmartphone-based object recognition and digital certification. | Pre-Seed / Jan 01, 2023 | ||
| Kriptomat they are a team of digital and tech enthusiasts from Slovenia, the home of Bitstamp, Iconomi, NiceHash, Viberate and many other high-quality digital currency projects. As early digital currency fans, they identified the need for a service for ordinary people (like their friends and family members), which will enable completecrypto-beginners to enter the world of cryptocurrency in a simple and quick way. | $2.6M / Seed / Jun 30, 2021 | ||
| We are Pandas, and our mission is to give consumers the most value out of their smartphones with zero hassle by empowering them to sell/trade them in the fastest, safest, and easiest way possible. 1Bn (with a B!) smartphones stop being used yearly after you upgrade to the latest and greatest. But there is a solution as simple as trading themin and getting paid while participating in the circular economy. So, why aren’t people selling their old phones, we wondered? This is where Pandas comes in. Inspired by humans and powered by tech, we ensure that the frustrating experience of trading in your smartphone becomes fast, simple, and fun. Our patented A.I. technology in the Panda Flex allows us to identify any smartphone and evaluate its condition, from the smallest nick to serious technical issues, with unprecedented accuracy. | $2.2M / Pre-Seed / Jun 01, 2020 | ||
| Welcome Pickups is a developer of an online platform for in-destination travel communities designed to give users a simple, amiable, and tailored travel experience.The company's platform links and communicates with residents of a specific location and organizes necessities, pre-ordered tickets, advice, and custom experiences guided bylocals, allowing passengers to travel safely and more effectively.Welcome Pickups was established in January 1, 2015 by Alexandros Trimis and Savvas Georgiou in Athens, Attiki. | $3.8M / Series A / Mar 20, 2019 |
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FAQ
What does John Tsioris invest in?
John Tsioris invests primarily in Information Technology, SaaS and Travel startups, most often at Pre-Seed and Seed stage. Most of the 6 investments tracked by Shizune back companies in Greece. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is John Tsioris's check size?
John Tsioris typically joins rounds of $156k–$2.6M at Seed and $169k–$2.2M at Pre-Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds John Tsioris participates in.
How do I contact John Tsioris?
Public channels for John Tsioris 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 John Tsioris last invest?
The most recent investment recorded for John Tsioris closed in Jan 2025. Shizune tracks 6 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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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