Union Square Ventures Review: The Iconic NYC VC Behind Twitter and Twilio
Everything you need to know about Union Square Ventures: their investment thesis, notable portfolio companies, typical check size, and how to position your startup for funding.
If you're building an internet or mobile company at the seed stage in New York, Union Square Ventures (USV) is arguably the most prestigious name you could have on your cap table. They're the firm that backed Twitter, Twilio, Stripe, and MongoDB — companies that have collectively created hundreds of billions of dollars in value.
Founded in 2003 by Fred Wilson and Brad Burnham, Union Square Ventures has built its reputation on being early believers in transformative internet and mobile companies. Their "thesis-driven" approach to investing has become a model for the industry.
In this guide, we'll cover what USV looks for, their investment criteria, notable portfolio companies, and how to position your startup to catch their attention.
Investment Focus & Thesis
Union Square Ventures focuses on seed-stage and early-stage internet and mobile companies. Their thesis centers on investing in networks and platforms that create value through user-generated content and community.
Stage Focus
Seed and Series A, with the ability to follow on through the life of a company. They call this "multi-stage support."
Check Size
$500K to $2M+ per investment. They prefer to lead or co-lead seed rounds and maintain reserves for follow-on investments.
USV has developed specific investment theses over the years:
- Network effects — Platforms that become more valuable as more users join
- Software as a service — Cloud-based business software
- Marketplaces — Two-sided platforms connecting buyers and sellers
- Open source — Companies built on open-source technologies
- Climate and sustainability — Companies addressing climate change
Recent Investment Activity
USV has remained highly active in 2025 and 2026, deploying capital through their latest funds. Recent investments include:
| Company | Sector | Round | Year |
|---|---|---|---|
| Efficient Computer | Hardware / Chips | Series A | 2025 |
| Zeitview | Drone Analytics | Series B | 2025 |
| Relay (Cocoa) | Developer Tools | Series A | 2025 |
| Stash | Fintech | Exit | 2026 |
In January 2025, USV launched their 2024 Core Fund, continuing their thesis-driven approach to early-stage investing. The fund focuses on being long-term, dedicated partners to a small number of teams creating networks and platforms.
Notable Portfolio Companies
USV's portfolio reads like a who's who of modern internet companies. Some of their most notable successes include:
USV was an early investor in Twitter, backing the company when it was just a handful of people. The company went public and was eventually acquired for $44 billion.
Twilio
The cloud communications platform that became a standard for adding voice, messaging, and video to applications. Now a public company worth billions.
Stripe
The payment processing platform that became the backbone of the internet economy. One of the most valuable private companies in the world.
MongoDB
The popular document database that revolutionized how developers think about data. Now a public company with a multi-billion dollar market cap.
Duolingo
The language learning platform that made education accessible to millions. USV invested early and the company went public in 2021.
USV has had 75 portfolio exits according to CB Insights, including multiple IPOs and acquisitions. Their portfolio includes over 200 companies across their funds.
What Union Square Ventures Looks For
Based on their published writings and investment patterns, here's what USV typically evaluates:
- Network dynamics — Companies that benefit from network effects and can become platforms
- Thesis alignment — Fit with their specific investment theses around networks, SaaS, marketplaces
- Founder quality — Strong founders with domain expertise and the ability to execute
- Market timing — Large markets undergoing technological or behavioral shifts
- Community potential — Ability to build engaged user communities
Pro Tip
USV is highly thesis-driven. Before reaching out, study their blog posts and public writings. Show how your company fits their thesis, not just that you're a good company.
How to Connect With USV
Getting a meeting with USV requires a thoughtful approach. Here's what we recommend:
Study Their Thesis
Read their blog posts and understand their investment thesis. Your pitch should explicitly connect to their themes.
Leverage Your Network
Warm introductions from founders they've backed or other VCs are highly valued. Build relationships before pitching.
Apply Through Their Website
They accept applications via email at info@usv.com. Make sure to include a clear description of your operations and current progress.
Attend Portfolio Events
USV hosts an annual portfolio summit. Building familiarity with their team in low-pressure settings can help when you're ready to fundraise.
The Value of Financial Preparedness
While USV invests in early-stage companies, they expect founders to have a handle on their financials. This is where many first-time founders struggle — and where bringing in fractional CFO support can make a significant difference.
Why Investors Care
- • Demonstrates business acumen
- • Shows you understand unit economics
- • Enables smarter decision-making
- • Speeds up due diligence
What You Need
- • Clear financial model with assumptions
- • Understanding of burn rate and runway
- • Realistic projections for growth
- • Network effect metrics
How Eagle Rock Helps
We help seed and Series A companies build financial infrastructure that impresses investors. From pitch deck financials to runway analysis, our fractional CFO services ensure you're ready for due diligence. We also have relationships with investors across the VC ecosystem and can make introductions when the time is right.
Ready to Strengthen Your Fundraising Deck?
Whether you're preparing to pitch Union Square Ventures or other top VCs, having professional financials can set you apart. Our team has helped companies raise over $200M in venture capital.
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