Riot Ventures
VC Fund
Los Angeles, United States
Riot Ventures is a VC fund in Los Angeles focused on Software and Robotics. Riot Ventures was founded by Steve Marcus and Will Coffield in 2017. The firm invests at the seed- and early-stage levels in the deep technology sector.
- Total investments:
- 53
- Last investment:
- Lead investor:
- 19%
- Last fund:
Last updated:
For AI agents: llms.txt
Industries Riot Ventures invests in
Stages Riot Ventures invests in
Countries Riot Ventures invests in
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Stephen Marcus
|
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Will Coffield
|
|||
Investment Focus
Industry
- Software 14 (26%)
- Robotics 6 (11%)
- Manufacturing 5 (9%)
- Machine Learning 4 (8%)
- Information Technology 4 (8%)
Stage
- Seed 15 (28%)
- Series A 9 (17%)
- Series B 5 (9%)
- Pre-Seed 4 (8%)
- Series E 3 (6%)
Country
- United States 22 (42%)
- Bulgaria 1 (2%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
|
Stephen Marcus
Co-Founder & General Partner
|
Co-Founder & General Partner | Total investments: 5 | Find email | |
|
Will Coffield
General Partner
|
General Partner | Total investments: 11 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Valar Atomics
|
Uses nuclear fission to create gas and oil from ambient air. | $1B / Series B / Aug 03, 2026 | |
Endurance Energy
|
Endurance Energy is a clean energy technology company that develops offshore geothermal power systems designed to generate continuous electricity from deep-sea hydrothermal resources. The company focuses on harnessing heat from tectonic and volcanic activity beneath the ocean floor, converting it into baseload power that can operate independentlyof traditional fuel supply chains. Its platform centers on seafloor-deployed generation systems intended to deliver steady power output in remote or high-demand regions. The company designs and builds subsea energy infrastructure that includes drilling systems, hydrothermal generators, and related marine deployment equipment. These systems are engineered to operate in deep-water environments where geothermal vents produce high-temperature fluids, enabling energy extraction through specialized conversion processes. The approach emphasizes continuous generation using naturally occurring thermal gradients rather than intermittent renewable sources.Endurance Energy also integrates maritime engineering, robotics, and offshore operations to support installation and maintenance of its systems. Its development model includes vessel-based deployment and testing, with engineering teams working on prototyping and validating equipment for deep-sea conditions. The company’s activities extend to operational planning for energy delivery to island grids and coastal infrastructure. | $54M / Series A / Jun 11, 2026 | |
True Anomaly
|
True Anomaly develops space security technologies, including spacecraft, software platforms, and mission systems for orbital operations. The company builds satellites and autonomous systems that support monitoring, maneuvering, and coordination in space environments. Its offerings include simulation tools and mission planning software that helpoperators model scenarios and manage on-orbit activities. The organization also provides hardware and integrated systems that enable responsive deployment and control of space assets. Its work focuses on supporting government and commercial missions that require situational awareness and operational capabilities beyond Earth. | $600M / Series D / Apr 28, 2026 | |
Shield AI
|
Shield AI is an enterprise-focused company specializing in AI-powered mission autonomy, developing and deploying advanced autonomous systems for defense and security. The company builds AI pilots that operate aircraft and drones, enabling autonomous flight in environments where communication and GPS may be unavailable. Its platform supports missionplanning, navigation, and real-time decision-making for aerial systems used in reconnaissance and operational tasks. Shield AI also integrates hardware and software components to deploy autonomous capabilities across different types of unmanned systems. The company works with government and defense organizations to support missions that require autonomous operation and data-driven coordination. | $2B / Series G / Mar 26, 2026 | |
Sift
|
A connected company is a powerful company. At Sift, we created the easiest way to unleash the power of your people to propel your organization forward. We make finding the right expert at the right time, or connecting to anyone in your organization on the go simple—allowing you to drive organizational performance while saving you time. Sift helpsyou take your organization into the people-first, digital age with a solution that is as simple as it is powerful. | $42M / Series B / Mar 25, 2026 | |
Sift
|
Sift offers transformative tools for machine creators to innovate at speed and scale. | $42M / Series B / Mar 25, 2026 | |
Integrate
|
Integrate is an ultra-secure project management platform for complex, multi-organization programs across government, defense, and enterprise. It replaces fragmented tools with a unified system that maintains a single, real-time source of truth across teams, organizations, and security boundaries—ensuring program integrity and enabling reliabledelivery of mission-critical outcomes. Backed by FPV Ventures, Integrate works with partners including the U.S. Space Force. | $17M / Series A / Feb 11, 2026 | |
Oxide Computer Company
|
Oxide Computer Company is a maker of server racks for on-premises compute infrastructure. The company uses technology to bring cloud hyper-scale innovations in the areas of density, efficiency, cost, reliability, manageability, and security of hardware and software, as well as the ability to segment racks into zones or regions based on where therack is located, allowing companies and IT professionals to access computer infrastructure built with innovation and to deliver hyper-scale cloud computing. | $200M / Series C / Feb 05, 2026 | |
|
Valar Atomics
|
Uses nuclear fission to create gas and oil from ambient air. | $105M / Series A / Nov 10, 2025 | |
EnduroSat
|
EnduroSat designs and engineers spacecraft for business applications and space exploration missions. The company focuses on swarm/constellation satellite applications. EnduroSat builds customized satellites and providing complete support service for full-cycle missions. | $104M / Venture - Series Unknown / Oct 30, 2025 | |
| See all 53 investments → | |||
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FAQ
What does Riot Ventures invest in?
Riot Ventures invests primarily in Software, Robotics and Manufacturing startups, most often at Seed and Series A stage. Most of the 53 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Riot Ventures?
Public channels for Riot Ventures include LinkedIn and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Who are the partners at Riot Ventures?
The team at Riot Ventures includes Stephen Marcus (Co-Founder & General Partner) and Will Coffield (General Partner). The Team section lists each member with their title, investment count and links.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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