Justin Butler
Venture investor in San Francisco
San Francisco, California
Justin Butler, Venture investor in San Francisco is an active investor based in San Francisco, California. This profile covers what Justin Butler backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCPEHedge FundInvestor
- Stages
- Seed
- Invests in
- Robotics & AutomationHardware & Deep TechAR/VR & MetaverseConsumer & RetailMedTech & Medical DevicesArtificial IntelligenceSpace & AerospaceBiotech & Pharma
- Location
- San Francisco, California
- Typical check
- $250K
- Past investments
- 59
Notable investments
Mantis Vision
June
Chord
Lighthouse
Rune LabsWatchmaker Genomics
SKULLY
Toka
Kindred AI
Spell
Bright MachinesCalifornia Institute for Regenerative Medicine (CIRM)How to reach Justin Butler
Angels and operators like Justin Butler 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.
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About this profile
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Cite this page
Round Funded. "Justin Butler." Round Funded investor database, updated September 24, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/justin-butler
Frequently Asked Questions
What does Justin Butler invest in?
Justin Butler invests in Robotics & Automation, Hardware & Deep Tech, AR/VR & Metaverse and Consumer & Retail, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Justin Butler invest at?
Justin Butler typically invests at Seed. Lead with traction that fits the stage when you reach out.
What is Justin Butler's typical check size?
Justin Butler typically writes checks around $250K. 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.