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3Si invests in breakthrough innovations within early-stage ventures that can disrupt markets. We build our portfolio based on compelling people, transformative ideas, significant intellectual property, deep market understanding, and the opportunity for capital efficiency and leverage. 

Copyright © 2019 3Si. All Rights Reserved. 

Working With Us

3Si invests in seed and early-stage information technology, Internet and software companies. In certain circumstances we will make later-stage investments that have early-stage characteristics, such as company re-starts or later-stage companies seeking their first round of institutional financing.

If you’re a serious entrepreneur, you’ve undoubtedly already learned that the best way to reach out to a venture capitalist is through pre-existing relationships. Investing in early-stage startups is really about investing in people, so having someone we trust (such as entrepreneurs we’ve previously backed, service providers we work with, or other people in our community) vouch for you is immensely helpful.

That said, we recognize that not all networks will intersect, so if your universe doesn’t currently overlap with ours, don’t let that deter you. You can send an email directly to any of us with an executive summary or description of your business/ideas along with how you think we can help.


Before reaching out to us, we strongly encourage you to look at our investment criteria to make sure your opportunity is one that is relevant to 3Si's capabilities and interest.