Sean O'Brien works as a Managing Partner at Overline. The firm's known portfolio counts 9 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Managing Partner at Overline, whose known portfolio counts 9 companies
- Pickleheads
- Verdata
- Sola
- Franzy
- Slip Robotics
- Askari Defense
- Cloneable
- BreachRx
- Sevii
Investor Profile
The listing covers sectors AI, Climate, Commerce and Consumer, and focus areas AI Agents, AI Applications, Aerospace and Animals. Startups operating in these areas may find Sean O'Brien relevant.
Stage-wise, the deals at Overline cluster around Pre-Seed, Seed and Series A rounds.
What the affiliated firm has backed is the closest available signal on whether Sean O'Brien is worth approaching.
Colleagues at Overline
Frequently asked questions
Who is Sean O'Brien?
Sean O'Brien is a venture capital investor based in Atlanta, Georgia, United States, listed as Managing Partner at Overline. The known portfolio of that firm counts 9 companies. That portfolio belongs to the firm, not to Sean O'Brien personally.
What does Sean O'Brien invest in?
Listed sectors include AI, Climate, Commerce and Consumer; listed focus areas include AI Agents, AI Applications, Aerospace and Animals. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Sean O'Brien invest at?
Overline appears in Pre-Seed, Seed and Series A rounds across its known deals, and Sean O'Brien is listed there as Managing Partner. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Sean O'Brien listed at?
Sean O'Brien is listed as Managing Partner at Overline. 2 other people in the database share a firm with Sean O'Brien.
How do I contact Sean O'Brien?
An email address and a LinkedIn page are on file for Sean O'Brien. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal