# Bradford Burnham

> Bradford Burnham is a Series A investor at Union Square Ventures backing Software. See 22 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Union Square Ventures](https://shizune.co/investors/profile/union-square-ventures)
- Location: New York, United States
- Total investments: 22
- Last investment: Jan 2025
- Lead investor: 41%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/brad-burnham-3355ba/
- X (Twitter): http://twitter.com/BradUSV
- Website: https://x.com/BradUSV

Bradford Burnham is a Series A investor at Union Square Ventures in New York focused on Software and Cryptocurrency. Brad Burnham is a Partner at Union Square Ventures. Brad previously worked at Tacoda as a Co Founder. Brad attended the Wesleyan University.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1M–$8.3M |
| Series A | $3.5M–$8.2M |
| Series B | $7M–$12M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 4 | 18% |
| Cryptocurrency | 3 | 14% |
| Email | 2 | 9% |
| Energy | 2 | 9% |
| Privacy | 2 | 9% |

53 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 5 | 23% |
| Seed | 4 | 18% |
| Series B | 4 | 18% |
| Angel | 1 | 5% |
| Pre-Seed | 1 | 5% |

11 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 10 | 45% |
| Canada | 1 | 5% |
| Finland | 1 | 5% |
| Germany | 1 | 5% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Cactos | Cactos is a smart energy storage system that secures power supply locally. It installs smart energy storage systems on client premises to optimize energy use and hedge against price volatility. | $7.3M | Venture - Series Unknown | Jan 31, 2025 |  |
| lockr | lockr is the first consumer-focused platform for identity, consent and data. The value exchange of the Internet – trading user data for subsidized access to digital content – was originally negotiated without consumers at the table. the impending deaths of the cookie and the device ID present a unique opportunity to redefine this model andincorporate consumer choice and consent into the equation.lockr is building the means for this revolution: a universal digital identity solution for tomorrow’s consumer that is congruent with the Internet economy. | $2.5M | Pre-Seed | Dec 25, 2022 |  |
| Zerion | Zerion is an investing app that enables anyone, anywhere in the world, to access a suite of new financial products and services built on the backbone of decentralized finance (DeFi). Simple, user-centered design is combined with a powerful tech stack that aggregates across every major decentralized exchange, offering users a single point of entryfor managing their digital assets with ease. Zerion is non-custodial, which means users never delegate their funds to the platform. This agile approach mitigates centralization risk and has allowed Zerion to operate globally since inception. | $12.3M | Series B | Oct 11, 2022 |  |
| Privy | Privy creates authentication, authorization, and data control tooling to enable developers to create products that keep users safe. It creates simple, powerful APIs for managing user data, allowing them to easily integrate user data into their products. Privy bridges the gap between users' on-chain activity and their off-chain data, allowingusers to create delightful experiences without putting themselves or the product at risk. | $8.3M | Seed | Apr 20, 2022 |  |
| Zerion | Zerion is an investing app that enables anyone, anywhere in the world, to access a suite of new financial products and services built on the backbone of decentralized finance (DeFi). Simple, user-centered design is combined with a powerful tech stack that aggregates across every major decentralized exchange, offering users a single point of entryfor managing their digital assets with ease. Zerion is non-custodial, which means users never delegate their funds to the platform. This agile approach mitigates centralization risk and has allowed Zerion to operate globally since inception. | $8.2M | Series A | Jul 07, 2021 |  |
| Stack Overflow | Stack Overflow is a platform for developers and programmers to share knowledge and solve coding challenges. It helps programmers get answers to their toughest coding questions, share knowledge with their coworkers in private, and find their next dream job. Jeff Atwood and Joel Spolsky co-founded Stack Overflow in 2008 in New York, New York. | $85M | Series E | Jul 28, 2020 |  |
| Zerion | Zerion is an investing app that enables anyone, anywhere in the world, to access a suite of new financial products and services built on the backbone of decentralized finance (DeFi). Simple, user-centered design is combined with a powerful tech stack that aggregates across every major decentralized exchange, offering users a single point of entryfor managing their digital assets with ease. Zerion is non-custodial, which means users never delegate their funds to the platform. This agile approach mitigates centralization risk and has allowed Zerion to operate globally since inception. | $2M | Seed | Dec 03, 2019 |  |
| 3Box | 3Box storage is simple, secure, and private by design. Apps that store data with users on 3Box are lighter, more trustworthy, and enjoy reduced data management liability. | $2.5M | Seed | Jun 26, 2019 |  |
| Blueprint Power | Blueprint Power is an NYC-based tech company whose mission is to accelerate the growth and financial sustainability of distributed, intelligent clean energy by helping regional groups of real estate companies transform their portfolios into power plants. More specifically, they manage these power plants to generate excess supply that they can thensell to markets and customers who increasingly need a more and higher quality supply of electricity.Blueprint is founded by experienced tech innovators and entrepreneurs from firms like Google, Boeing, and Vestas, and are backed by prominent corporate leaders and venture investors from the worlds of real estate, energy, and tech. | $3.5M | Series A | Jul 31, 2018 |  |
| OB1 | OB1 is a developer of a peer-to-peer trading platform used to offer a cryptocurrency marketplace. It makes online trade free for everyone allowing them to buy and sell anything to anyone else for free. OB1 was established in 2015 and is headquartered in Fairfax, Virginia. | $5M | Series A | Mar 13, 2018 |  |

10 of 22 investments shown.

## Co-investors
- [Andreessen Horowitz](https://shizune.co/investors/profile/andreessen-horowitz) — VC Fund, 3 deals together
- [BlueYard Capital](https://shizune.co/investors/profile/blueyard-capital) — VC Fund, 3 deals together
- [Genacast Ventures](https://shizune.co/investors/profile/genacast-ventures) — VC Fund, 3 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 3 deals together
- [Sequoia Capital](https://shizune.co/investors/profile/sequoia-capital) — VC Fund, 3 deals together
- [Spark Capital](https://shizune.co/investors/profile/spark-capital) — VC Fund, 3 deals together

## About Union Square Ventures

VC Fund · New York, United States

Union Square Ventures is a private equity and venture capital firm focused on early-stage, growth capital, late-stage, and startup financing. The USV portfolio companies create services that have the potential to fundamentally transform important markets. It exclusively invests in the internet world, focusing on the applications layer of the web,internet services, and web services that create large networks as well as the mobile sector. Some of its invested companies are based in New York, San Francisco, London, Berlin, and places in between. It typically makes a starting investment in portfolio companies of $1 million. In certain Series Around cases, the firm may make a starting investment between $2.5 million to $3 million. It typically invests up to $20 million in any single company.Union Square Ventures was founded in 2003 and is based in New York, United States.

5 contacts available at Union Square Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| Hanel Baveja | Analyst | https://shizune.co/investors/profile/hanel-baveja |
| Mona Alsubaei | Analyst | https://shizune.co/investors/profile/mona-alsubaei |
| Albert Wenger | Managing Partner | https://shizune.co/investors/profile/albert-wenger |
| Andy Weissman | Managing Partner | https://shizune.co/investors/profile/andy-weissman |
| Bradford Burnham | Partner | https://shizune.co/investors/profile/brad-burnham |

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## FAQ

### What does Bradford Burnham invest in?

Bradford Burnham invests primarily in Software, Cryptocurrency and Email startups, most often at Series A and Seed stage. Most of the 22 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 Bradford Burnham's check size?

Bradford Burnham typically joins rounds of $1M–$8.3M at Seed, $3.5M–$8.2M at Series A and $7M–$12M 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 Bradford Burnham participates in.

### When did Bradford Burnham last invest?

The most recent investment recorded for Bradford Burnham closed in Jan 2025. Shizune tracks 22 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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