Barrett Foster, Operating Partner at Altos Ventures is an active investor based in Boston, United States. This profile covers what Barrett Foster backs, at which stage, and how founders can reach out in 2026.
Barrett Foster is an Operating Partner at Altos Ventures and the Founder of Manufacturing Outcomes, Inc.
Barrett Foster invests in Manufacturing & Industrial, typically at Early Stage Venture and Late Stage Venture.
- Investor type
- VC
- Stages
- Early Stage VentureLate Stage Venture
- Invests in
- Manufacturing & Industrial
- Location
- Boston, United States
- Typical check
- $3.8M
How to reach Barrett Foster
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Round Funded. "Barrett Foster." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/barrett-foster
Frequently Asked Questions
Who is Barrett Foster?
Barrett Foster, Operating Partner at Altos Ventures is an active investor based in Boston, United States. Barrett Foster invests in Manufacturing & Industrial, typically at Early Stage Venture and Late Stage Venture.
What does Barrett Foster invest in?
Barrett Foster invests in Manufacturing & Industrial, typically at Early Stage Venture and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Barrett Foster invest at?
Barrett Foster typically invests at Early Stage Venture and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Barrett Foster's typical check size?
Barrett Foster typically writes checks around $3.8M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.