# Brennan O'Donnell

> Brennan O'Donnell is a seed investor at Frontline Ventures backing SaaS and Database. See 5 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Frontline Ventures](https://shizune.co/investors/profile/frontline-ventures)
- Location: San Francisco Bay Area, United States
- Total investments: 5
- Last investment: Apr 2025
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/brennanpodonnell
- X (Twitter): https://twitter.com/brennanodonnell
- Website: https://x.com/brennanodonnell

Brennan O'Donnell is a seed investor at Frontline Ventures in San Francisco Bay Area focused on SaaS and Database. Brennan O'Donnell is the partner at Frontline Ventures' late-stage fund, Frontline Growth. He attended Northwestern University.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SaaS | 2 | 40% |
| Database | 2 | 40% |
| Internet | 2 | 40% |
| Developer Tools | 2 | 40% |
| Information Technology | 2 | 40% |

19 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 3 | 60% |
| Series A | 1 | 20% |
| Series C | 1 | 20% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Hydrolix | Hydrolix is an early-stage startup with an ambition to change the economics of high density data. The company develops a query service technology intended to process petabyte-scale time series data.Hydrolix's cloud-based query service utilizes proprietary compression and indexing technology, allowing customers to process sub-secondinteractive queries at a fraction of the cost of other existing services. | $80M | Series C | Apr 03, 2025 |  |
| Vibely | Vibely powers next-gen communities led by creators. Make your content interactive through flourishing, multi-directional communities that accomplish their goals together. |  | Seed | Nov 16, 2020 |  |
| Forethought | Launched in 2018, Forethought is a generative AI for customer service automation to maximize efficiency and productivity. Forethought’s products enable seamless customer experiences by infusing generative AI, powered by Large Language Models (LLMs), at each stage of the customer support journey: resolving common cases instantly, predicting andprioritizing cases, and assisting agents with relevant knowledge. | $1M | Seed | Feb 20, 2018 |  |
| Airtable | Airtable is a cloud-based software company that offers an easy-to-use online platform for creating and sharing relational databases.It brings the database out of the realm of power users and into the mainstream, creating a new type of flexible but sophisticated productivity tool that anyone can use. Airtable gives end-users the ability to createand share their own workflows for everything from managing an editorial calendar to planning a major event. The platform helps create flexible checklists, organize collections or ideas, and manage customers or contacts as well as offers a variety of templates ranging from home improvement to store inventory, enabling users to build custom applications without any prior coding experience.The company was founded by Andrew Ofstad, Emmett Nicholas, and Howie Liu in 2013 and is headquartered in San Francisco, California. | $7.6M | Series A | Jun 29, 2015 |  |
| Mode Analytics | Mode Analytics is a developer of a collaborative analytics platform used to make data-informed decisions. It hosts a central repository of work and surfaces it to analysts in real-time, allowing them to address problems without needing to first recreate work.Mode was founded in 2013 by Derek Steer, Benn Stancil, and Josh Ferguson in SanFrancisco, California. | $550K | Seed | Oct 17, 2013 |  |

5 of 5 investments shown.

## Co-investors
- [QED Investors](https://shizune.co/investors/profile/qed-investors) — VC Fund, 2 deals together
- [Script Capital](https://shizune.co/investors/profile/122-west-ventures) — VC Fund, 1 deal together
- [8VC](https://shizune.co/investors/profile/8vc) — VC Fund, 1 deal together
- [Adapt Ventures](https://shizune.co/investors/profile/adapt-ventures) — VC Fund, 1 deal together
- [Afore Capital](https://shizune.co/investors/profile/afore-capital) — VC Fund, 1 deal together
- [A-Grade Investments](https://shizune.co/investors/profile/a-grade-investments) — VC Fund, 1 deal together

## About Frontline Ventures

VC Fund · London, United Kingdom

Wherever you are on your journey we have the fund to help you expandEXPERTS IN EXPANSION Founders see what the world misses. In fast pursuit of opportunity, you make critical decisions with little certainty. We get it, because we’ve been there. Frontline is the venture firm for globally ambitious B2B companies on both sides of the Atlantic.Frontline Seed speeds up ideas at inception across Europe. Frontline X is a growth-stage fund, for fast and frictionless US-Europe expansion.WE'VE LEARNED IT THE HARD WAY As a team of entrepreneurs, we have built many businesses, many ways. And as a venture fund, we’ve helped tens of founders and CEOs cross the pond. We’ve scaled too – with team members in Dublin, London and San Francisco. Today, our team, LPs and advisors represent senior leadership at many of the world’s most successful B2B companies (Think: Segment, Stripe, Looker, Linkedin, Airtable, Google and Workday – to name a few). Collectively, we can add value when founders need it most – at company defining moments.CAPITAL IS CHEAP Look around; the venture market is drowning in noise. Hundreds of funds and millions of blogposts – all claiming to “add value” left and right. We believe that capital is cheap, and we know that value-add is not made equal. Our focus is clear; we back challengers with global ambition, and we dedicate our time to helping them fly higher – faster. Our experience makes us knowledgeable. Our global network makes us unique. Want more detail or first-hand accounts? we are happy to introduce you to our founders.SYMBIOSIS In nature, the best things work together. We see the landscape ahead and can warn you of the risks, while you stay strong and focused on your goals. Indispensable; that’s how we see our relationship.

5 contacts available at Frontline Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| David Clarke | Venture Partner | https://shizune.co/investors/profile/david-clarke-8 |
| Shay Garvey | Venture Partner | https://shizune.co/investors/profile/shay-garvey |
| Brennan O'Donnell | Partner | https://shizune.co/investors/profile/brennan-donnell |
| George Radford | Principal | https://shizune.co/investors/profile/george-radford |
| Jamie Bristow | Principal | https://shizune.co/investors/profile/jamie-bristow |

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### Similar stage
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- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
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## FAQ

### What does Brennan O'Donnell invest in?

Brennan O'Donnell invests primarily in SaaS, Database and Internet startups, most often at Seed and Series A stage. Most of the 5 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Brennan O'Donnell last invest?

The most recent investment recorded for Brennan O'Donnell closed in Apr 2025. Shizune tracks 5 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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