Brennan O'Donnell is an angel investor based in Palo Alto, California, United States. The known portfolio counts 5 companies: Forethought, Atrium, Vibely, Mode Analytics and WorkFlowy.
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Investment focus
Contacts
Brennan O'Donnell portfolio companies (5)
- Forethought
- Atrium
- Vibely
- Mode Analytics
- WorkFlowy
Affiliated funds' portfolios
Partner at Frontline Ventures, whose known portfolio counts 15 companies
- Realm
- Donna
- Seapoint
- Fresco
- AirOps
- Baserow
- Stanhope AI
- Unleash
- Toyo
- Tucuvi
- Avallon Labs
- Cellbyte
- and 3 more
Investor Profile
The known portfolio sits in sectors Commerce, FinTech, Healthcare and SaaS, and focus areas Analytics, Cloud Infrastructure, Enterprise SaaS and HR Tech.
Brennan O'Donnell appears in Seed, Series A and Series B rounds across the known deals.
The portfolio and focus above give founders context on whether Brennan O'Donnell matches their raise.
Colleagues at Frontline Ventures
David Clarke
Venture Partner
Dublin, Ireland
Jamie Bristow
Principal
New York, United States
George Radford
Principal
London, United Kingdom
Steven Collins
CTO, Entrepreneur, Investor, Advisor
United Kingdom
Shay Garvey
Venture Partner
Ireland
Philipp Werner
Investor
London, United Kingdom
Zoe Chambers
Partner
London, United Kingdom
William McQuillan
Partner
London, United Kingdom
Will Prendergast
Partner
Dublin, Ireland
Ruth Sheridan
Principal
London, United Kingdom
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Frequently asked questions
Who is Brennan O'Donnell?
Brennan O'Donnell is an angel investor based in Palo Alto, California, United States with 5 known investments on file, among them Forethought, Atrium and Vibely. The sections above list the sectors, stages and firms attached to that record.
What does Brennan O'Donnell invest in?
Listed sectors include Commerce, FinTech, Healthcare and SaaS; listed focus areas include Analytics, Cloud Infrastructure, Enterprise SaaS and HR Tech. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Brennan O'Donnell invest at?
The known deals of Brennan O'Donnell include Seed, Series A and Series B rounds. 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 Brennan O'Donnell listed at?
Brennan O'Donnell is listed as Partner at Frontline Ventures. 10 other people in the database share a firm with Brennan O'Donnell.
How do I contact Brennan O'Donnell?
An email address, a phone number and a LinkedIn page are on file for Brennan O'Donnell. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal