James Detweiler

Active Investor

General Partner at Felicis

San Francisco, California

LinkedIn

James Detweiler, General Partner at Felicis is an active investor based in San Francisco, California. This profile covers what James Detweiler backs, at which stage, and how founders can reach out in 2026.

James Detweiler invests in Artificial Intelligence and Developer Tools & Data, typically at Early Stage Venture and Series A. Portfolio companies on record include Mercor, Zetta Venture Partners and Skild AI.

Firm
Felicis
Location
San Francisco, California
Typical check
$750K
Past investments
6

What does James Detweiler invest in?

Investor type
VCPEFinance OperatorFounderInvestor
Stages
Early Stage VentureSeries A

Where is James Detweiler based?

James Detweiler is based in San Francisco, California.

Which companies has James Detweiler invested in?

MercorZetta Venture PartnersSkild AIRicursive IntelligenceSVB CapitalPeriodic Labs

How to reach James Detweiler

Angels and operators like James Detweiler 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

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. How this data is built.

Cite this page

Round Funded. "James Detweiler." Round Funded investor database, updated September 25, 2026.

Stable URL, it will not change: https://www.roundfunded.com/en/investor/james-detweiler

Frequently Asked Questions

Who is James Detweiler?

James Detweiler, General Partner at Felicis is an active investor based in San Francisco, California. James Detweiler invests in Artificial Intelligence and Developer Tools & Data, typically at Early Stage Venture and Series A. Portfolio companies on record include Mercor, Zetta Venture Partners and Skild AI.

What does James Detweiler invest in?

James Detweiler invests in Artificial Intelligence and Developer Tools & Data, typically at Early Stage Venture and Series A. Match your sector and stage, then reach out with a personalized pitch.

What stage does James Detweiler invest at?

James Detweiler typically invests at Early Stage Venture and Series A. Lead with traction that fits the stage when you reach out.

What is James Detweiler's typical check size?

James Detweiler typically writes checks around $750K. Use it as a signal for whether your raise fits their stage.

Where is James Detweiler based?

James Detweiler is based in San Francisco, California.

Which companies has James Detweiler invested in?

Companies James Detweiler has backed, according to the Round Funded catalog, include Mercor, Zetta Venture Partners, Skild AI, Ricursive Intelligence, SVB Capital and Periodic Labs.

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.

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