James Detweiler

General Partner at Felicis

📍 Menlo Park, California, United States🔄 Updated September 2026💼 20 investments📅 8 years investing🗓 Last invested Jan 2026
VC🌍 United States20+ investments
20
Total investments
10
Early stage
0
Mid stage
1
Late stage
8y
Years active

Portfolio

20 investments · sorted by recency
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Late stage
Investor, Observer
2026
Singularity is the only defense company purpose built and prepared to deploy counter-weapons at the scale, speed, and cost required by the people who need them. We relentlessly iterate, and every system we ship is fully developed and produced in-house. We are not a normal defense company: our only measure of success is civilians protected and warfighters brought home to their families.
Investor, Observer
2025
Making the world safer and more secure with terahertz imaging.
Investor
2025
Paraform is an Agentic Hiring Platform that makes hiring exceptional talent as easy as pressing a button. Our first product is an AI-powered recruiter marketplace, where expert recruiters and custom AI agents work together to fill your critical roles faster than ever before. To date we have helped 1,000+ customers like Palantir, Rippling, Decagon, Abridge, Cognition, Owner, Basis, Thompson Reuters, Arby’s, and Wilson Sonsini hire world-class talent and significantly accelerate the trajectory of their business. We’re backed by Scale Venture Partners, Felicis, A*, Liquid 2, BOND, DST Global, and the founders of YouTube, Instacart, Canva, and more.
Investor
2025
Superhuman spatial reasoning for autonomy.
Investor
2025
Operand Inc. is an AI-enabled consulting firm for consumer retail. We leverage proprietary AI systems to set strategy for leading brands and retailers, currently specializing in pricing and promotions.
Investor, Observer
2025
DeepJudge is the core AI platform for legal professionals. Powered by world-class enterprise search that serves up immediate access to all of the institutional knowledge in your firm, DeepJudge enables you to build entire AI applications, encapsulate multi-step workflows, and implement LLM agents. DeepJudge founders are ex-Google researchers with PhDs in AI from ETH Zurich and our leadership team has held senior roles at Thomson Reuters, Casetext, Agiloft and more. Our mission is to empower teams of lawyers to better harness their collective knowledge, enabling them to focus on the strategic aspects of their work.
Investor
2025
Were building AI scientists and the autonomous laboratories for them to operate. Join us: https://jobs.ashbyhq.com/periodic-labs
Investor
2025
A frontier AI lab enabling a recursive self-improvement loop between AI and the chips that fuel it.
Investor
2025
Were building agents that investigate and resolve production alerts end-to-end. Deeptrace cuts through the noise, pinpoints root causes instantly, and gives engineering teams back the one thing they need most: the freedom to build instead of firefight. 🚀
Investor, Observer
2024
Pantheon AI is a stealth startup based in the San Francisco Bay Area.
Investor, Observer
2024
Third Dimension provides immersive quality, rendering engine ready content that is ready to use by professionals across multiple industries. Third Dimension’s target customers range from The U.S. Military to video game developers to autonomous vehicle companies.
Investor, Observer
2024
Moondream is a computer-vision model can answer real-world questions about images. Its tiny by todays models, with only 1.6B parameters. That enables it to run on a variety of devices, including mobile phones and edge devices.
Investor
2024
Building general purpose robotic intelligence.
Investor, Observer
2024
We find the best experts in every professional domain and put their knowledge to work training frontier models. Through APEX, we measure whether those models can actually perform economically valuable work. Were also bringing that expertise to enterprises: deploying custom AI agents, staffing teams with vetted domain experts, and helping organizations encode their own knowledge into AI systems.
Investor, Observer
2023
Predibase is the fastest, most efficient way to productionize open-source AI. As the developer platform for open-source AI, Predibase makes it easy for engineering teams to fine-tune and serve any open-source LLM or deep learning model on state-of-the-art infrastructure in the cloud at the lowest possible cost. Built by the team that created the internal AI platforms at Apple and Uber, Predibase is fast, efficient, and scalable for any size job. Predibase pairs an easy to use declarative interface with high-end GPU capacity on serverless managed for infra training and serving to ensure engineers have a solution for the complete ML lifecycle. Most importantly, Predibase is built on open-source foundations, including Ludwig and LoRAX, and can be deployed in your private cloud so all of your data and models stay in your control. In production with both Fortune 500 and high growth companies, Predibase is helping engineering teams deliver AI driven value back to their organization in days, not months. Try Predibase for free: https://predibase.com/free-trial.
Show all 20 investments ↓
Experience · 21 entries
All (21)
Investments (20)
2026
Investor, Observer
2026
Singularity is the only defense company purpose built and prepared to deploy counter-weapons at the scale, speed, and cost required by the people who need them. We relentlessly iterate, and every system we ship is fully developed and produced in-house. We are not a normal defense company: our only measure of success is civilians protected and warfighters brought home to their families.
2025
Investor, Observer
2025
Making the world safer and more secure with terahertz imaging.
Investor
2025
Paraform is an Agentic Hiring Platform that makes hiring exceptional talent as easy as pressing a button. Our first product is an AI-powered recruiter marketplace, where expert recruiters and custom AI agents work together to fill your critical roles faster than ever before. To date we have helped 1,000+ customers like Palantir, Rippling, Decagon, Abridge, Cognition, Owner, Basis, Thompson Reuters, Arby’s, and Wilson Sonsini hire world-class talent and significantly accelerate the trajectory of their business. We’re backed by Scale Venture Partners, Felicis, A*, Liquid 2, BOND, DST Global, and the founders of YouTube, Instacart, Canva, and more.
Investor
2025
Superhuman spatial reasoning for autonomy.
Investor
2025
Operand Inc. is an AI-enabled consulting firm for consumer retail. We leverage proprietary AI systems to set strategy for leading brands and retailers, currently specializing in pricing and promotions.
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Investment activity
2018–2026 · 20 investments
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