Stefan Thomas
Angel Investor
San Francisco, United States
Stefan Thomas is a seed investor in San Francisco focused on Internet and Software. Stefan Thomas wants to live in a world where currency moves as frictionlessly as information. As CTO of Ripple, he is helping to build an Internet protocol that does just that. Stefan is one of the co-creators of the Interledger Protocol (ILP).Prior to Ripple, he developed vast experience in digital currencies, being both the founder of,WeUseCoins.com, the largest website for novice Bitcoin users,and the creator of BitcoinJS, a software package used by a wide range of Bitcoin businesses all over the world. Now, at Ripple Labs, his overarching motivation is to weave a global value web by making it easy for developers - from individual entrepreneurs to financial institutions - to build extremely efficient money transfer systems using the Ripple protocol, and, in the end, a world in which exchanging value is as frictionless, free and fast as exchanging information.
- Total investments:
- 6
- Last investment:
- Lead investor:
- 17%
Last updated:
For AI agents: llms.txt
Industries Stefan Thomas invests in
Stages Stefan Thomas invests in
Countries Stefan Thomas invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $2.5M–$4M
- Series B
- $20M–$25M
Investment Focus
Industry
- Internet 4 (67%)
- Software 2 (33%)
- Apps 1 (17%)
- SaaS 1 (17%)
- Web3 1 (17%)
Stage
- Seed 4 (67%)
- Series B 2 (33%)
Country
- United States 5 (83%)
- Croatia 1 (17%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Puma Browser
|
Puma is a mobile browser and wallet for the Web3 ecosystem. Private by design. Today, we enable native IPFS, HNS & ENS support and seamless payments for creators, app & game developers via Coil and ILP. Long Term, our goal is to give 1b people access to the peer-to-peer and ownership based economy. | Seed / Jul 25, 2021 | |
Cinnamon
|
We'll build the software. You build the business!Whatever we work on we make it beautiful, we make it easy to use and we make it robust. And in doing so we don't break the bank.High-performing software products should not cost you a fortune!Our team of 14 UX/UI designers creates web and mobile apps people enjoy to use.Ourteam of 20 focused developers makes sure these apps are stable and robust.Our management team makes sure you always know what's going on and the deadlines are met."Go-to guys when it comes to building apps that work great, at a good price."- Calle Sjoenell, Head of Facebook Creative Shop Nordics | $2.5M / Seed / Jun 04, 2020 | |
Cinnamon
|
Backed by a strong business plan, Cinnamon strives to change the way we view content and the way that content is monetized. To replace the prevailing corporate-based financial model with one in which the creative content partners are compensated immediately and fairly. Ours will be a home and online community for innovative ideas, imagery, videos,short films, serialized content with a whole new way of doing business. | $2.5M / Seed / Jun 04, 2020 | |
Coil
|
Coil specializes in providing web content monetization solutions. Its monetization model offers an alternative to the status quo of paid advertisements and selling the public’s attention to the highest bidders. The company was founded in 2018 and is headquartered in San Francisco, California. | $4M / Seed / Aug 15, 2019 | |
mkgoups
|
Imgur is an internet company that specializes in providing online entertainment for its users. Its platform offers internet, gifs, community, memes, visual storytelling, images, mobile, and native ads that helps people to unwind and have fun. The company was founded in 2009 and headquartered in San Francisco, California. | $20M / Series B / Jun 26, 2019 | |
Omni
|
Omni provides access to the things you need through its rentals platform. By partnering with local businesses, Omni is bringing rentals to communities so everyone can have access to more items — from bikes and surfboards to camping equipment and air purifiers. Customers can reserve items from local businesses and pick up them instantly, or bookrentals in advance.The company is headquartered in San Francisco, California, United States. | $25M / Series B / Jan 16, 2018 |
Co-Investors
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FAQ
What does Stefan Thomas invest in?
Stefan Thomas invests primarily in Internet, Software and Apps startups, most often at Seed and Series B stage. Most of the 6 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Stefan Thomas's check size?
Stefan Thomas typically joins rounds of $2.5M–$4M at Seed and $20M–$25M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Stefan Thomas participates in.
How do I contact Stefan Thomas?
Public channels for Stefan Thomas 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 Stefan Thomas last invest?
The most recent investment recorded for Stefan Thomas closed in Jul 2021. 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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