William Allen
Founder | General Partner at Subrosa Ventures
Palo Alto, California
William Allen, Founder | General Partner at Subrosa Ventures is an active investor based in Palo Alto, California. This profile covers what William Allen backs, at which stage, and how founders can reach out in 2026.
William Allen is a Founder and General Partner at Subrosa Ventures, an early-stage venture capital fund investing in commercial software and industrial technology.
- Investor type
- VC
- Stages
- Early Stage Venture
- Invests in
- SaaS & EnterpriseManufacturing & Industrial
- Location
- Palo Alto, California
- Typical check
- $500K
How to reach William Allen
Angels and operators like William Allen reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
Connect with William Allen
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise.
Frequently Asked Questions
What does William Allen invest in?
William Allen invests in SaaS & Enterprise and Manufacturing & Industrial, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does William Allen invest at?
William Allen typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is William Allen's typical check size?
William Allen typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
How do I contact William Allen?
Unlock William Allen's verified email on Round Funded and send a personalized pitch. We surface only deliverable contacts so your outreach lands.
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.