Tom Preston

About

Portfolio · 2

Milestone

Generative AI ROI And Engineering Productivity Platform

1 round $10.0M committed Latest: 2025-11

Digma

Platform to Validate Developer and GenAI Code

1 round $6.0M committed Latest: 2023-09

Investment activity

Q&A

What is Tom Preston's primary role in the startup ecosystem?

Tom Preston is an angel investor and co-founder of GitHub.

What is Tom Preston's investment focus by stage?

Tom Preston primarily invests in Seed-stage companies, with two such investments recorded.

Which sectors has Tom Preston focused on for investments?

Tom Preston has concentrated his investments in the Business Software sector, with two portfolio companies in this area.

Can you name some of Tom Preston's portfolio companies?

Tom Preston's portfolio includes Digma, a platform to validate developer and GenAI code, and Milestone, a Generative AI ROI and engineering productivity platform.

What was Tom Preston's most recent investment?

Tom Preston invested in Milestone's Seed round in November 2025, which raised $10M.

What was the funding amount for Tom Preston's investment in Digma?

Tom Preston participated in Digma's Seed round in September 2023, which raised $6M.

What is the typical investment range for Tom Preston?

Tom Preston's investment range is between $6M and $10M.