Brian O'Kelley
Angel Investor
New York, United States
Brian O'Kelley is a seed investor in New York focused on Software and Information Technology. Brian O’Kelley is CEO and co-founder of Scope3, leading the decarbonization of the media and advertising industry.A respected entrepreneur and executive with a track record of building companies that have defined and led multi-billion dollar categories, Brian was the co-founder and CEO of AppNexus through its $1.6B sale to AT&T in 2018. Heco-founded Waybridge, a supply chain technology company, and served as CTO of Right Media through its successful acquisition by Yahoo. Brian is an active board member of LiveRamp (RAMP), Tech:NYC, and the IAB Tech Lab, and is an executive producer of the Wonderstruck podcast.Credited with the invention of programmatic advertising and the online ad exchange, Brian is deeply committed to technology-driven innovations that benefit society while improving the health of the planet. Brian has been named to Crain’s 40 Under 40, Adweek 50 and Silicon Alley 100 lists, holds multiple patents, and was recognized as an E&Y Entrepreneur of the Year in the New York region in 2012. Brian was an early supporter of Girls Who Code and Moms First and is deeply committed to making the technology industry more inclusive.Brian has a B.S.E. in Computer Science from Princeton University. He lives in Brooklyn with his wife, two daughters, and two cats.
- Total investments:
- 18
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Brian O'Kelley invests in
Stages Brian O'Kelley invests in
Countries Brian O'Kelley invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1.1M–$6.6M
- Pre-Seed
- $250k–$2.5M
- Series A
- $1.3M–$26M
Investment Focus
Industry
- Software 6 (33%)
- Information Technology 6 (33%)
- Advertising 5 (28%)
- Artificial Intelligence 5 (28%)
- Machine Learning 3 (17%)
Stage
- Seed 6 (33%)
- Pre-Seed 5 (28%)
- Series A 3 (17%)
- Angel 2 (11%)
- Series B 1 (6%)
Country
- United States 11 (61%)
- United Kingdom 2 (11%)
- France 1 (6%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| InfoHawk is a Software Development company. | $2.3M / Pre-Seed / Jun 08, 2026 | ||
| Firsthand operates as an AI agent platform built for brands & publishers. | $26M / Series A / Mar 04, 2025 | ||
| Nodals AI is a newly launched media buying platform that aims to enhance advertising performance by leveraging first-party data signals from media owners.Nodals AI seeks to address the evolving challenges in digital advertising where traditional identifiers like cookies are becoming less effective due to privacy concerns and regulatory changes. | $2.5M / Pre-Seed / Feb 05, 2025 | ||
| Firsthand operates as an AI agent platform built for brands & publishers. | $6.6M / Seed / Feb 21, 2024 | ||
| Founded in 2017, Picnic is a London-based provider of advertising products for various KPIs. | $1.3M / Series A / Sep 14, 2023 | ||
| GetGloby is an AI-powered platform that instantly translates Ads Campaigns into 100+ languages with high performing results. | $1.3M / Pre-Seed / Mar 20, 2022 | ||
Break Sports
|
We are on a mission to empower anyone to become an athlete. We are doing this by building and online destination for players to discover and connect with competitive and recreational sport activities through one platform. | Pre-Seed / Sep 01, 2020 | |
| Break the Love is re-inventing the tennis club with an online platform that helps players (of all levels!) discover and book group based recreational tennis activities from highly curated coaches. Our coaches gain access to education, marketing, and additional income streams through our affiliate pro program. Through Break the Love’s technology, wesupport partners including tennis companies, leagues, nonprofits, parks and resorts to provide an amazing experience for all. | $250K / Pre-Seed / Sep 01, 2020 | ||
| Time Study offers a time intelligence platform that uses machine intelligence to activate and transform enterprise time data into real-time insights on how time is spent and its impact on workforce effectiveness, operational efficiency and compliance. The team is led by 3x entrepreneur and computer scientist Kishau Rogers; she is joined by anexperienced team bringing many years of collective experience growing & building enterprise software solutions. Many of the top US hospitals have selected Time Study as their cloud application for studying how time is spent (at work). | $2.3M / Seed / Sep 01, 2019 | ||
| SafeGraph builds and maintains data sets to help accelerate machine learning and AI. Its high-precision places data covers business listings, building footprints, and aggregated foot traffic data for millions of points of interest (POI) and thousands of brands in the US and Canada. With detailed brand affiliation, spatial hierarchy, and other keybusiness details, SafeGraph data informs market analytics, investment research, site selection, and more.It was founded in 2016 and is based in San Francisco, California. | $16M / Series A / Apr 19, 2017 | ||
| See all 18 investments → | |||
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FAQ
What does Brian O'Kelley invest in?
Brian O'Kelley invests primarily in Software, Information Technology and Advertising startups, most often at Seed and Pre-Seed stage. Most of the 18 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 Brian O'Kelley's check size?
Brian O'Kelley typically joins rounds of $1.1M–$6.6M at Seed, $250k–$2.5M at Pre-Seed and $1.3M–$26M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Brian O'Kelley participates in.
How do I contact Brian O'Kelley?
Public channels for Brian O'Kelley 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 Brian O'Kelley last invest?
The most recent investment recorded for Brian O'Kelley closed in Jun 2026. Shizune tracks 18 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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