Paul Straub

Managing Partner & Co-Founder at Wireframe Ventures

📍 San Francisco, California, United States🔄 Updated September 2026💼 25 investments📅 25 years investing🗓 Last invested May 2025
VC🌍 United States20+ investments
25
Total investments
17
Early stage
3
Mid stage
1
Late stage
25y
Years active

Portfolio

24 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor
May 2025
Ezra is the connective infrastructure for private credit and asset-backed finance. We help companies raising $10M–$250M+ in asset-backed and project financing connect with institutional lenders, credit funds, and broker-dealers actively deploying capital. For companies, Ezra helps structure deal materials, anticipate diligence questions, and approach investors with confidence. For lenders and intermediaries, Ezra surfaces qualified private credit opportunities and helps originate deals faster. Our team previously helped raise and deploy $15B+ in asset-backed finance at Mosaic and other companies. If youre raising capital or sourcing deals, wed love to connect.
Investor
Jan 2025
C.Scale is a software platform enabling architects and building owners to make data-driven decisions throughout the design process, driving down both costs and whole life carbon emissions. Leveraging data on thousands of buildings in planning and design, the platform connects supply and demand for high-performance, low-carbon products in the fragmented, $1 trillion building materials market. C.Scales AI/ML-powered platform that solves a critical supply chain inefficiency: connecting building product manufacturers directly with designers at the point of specification. As regulation and owners seeking higher performance buildings drive demand for low-carbon products, C.Scale enables architects to make streamlined, data-driven design and procurement decisions while helping manufacturers reach qualified buyers. C.Scale utilizes building life cycle assessment to give a holistic description of a building’s materials, systems, and environmental impacts. The company’s unique AI/ML toolkit gives designers and owners the ability to evaluate the impacts of their decisions from the very beginning of the project. For manufacturers, the platform will offer a flow of high-quality leads by tracking detailed material quantities and carbon performance requirements from the earliest project phases, while providing visibility into the design process from concept through construction. In the past six months, hundreds of enterprise customers have modeled over 1,200 projects representing more than 120 million square feet of construction in C.Scale. These customers include 2 of the top 3 largest architecture firms in North America and 9 AIA Firm Award recipients. Global corporations, including Autodesk and Schneider Electric, are integrating C.Scale into their products and platforms. And Stanford University is piloting the platform to align building planning and procurement with long-term campus commitments.
Investor
Jul 2023
SirenOpt is accelerating sustainable and smart manufacturing of advanced materials by delivering a manufacturing intelligence platform that uses intelligent characterization and real-time decision-making to drive the creation of innovative, high-performance products that fuel the advancement of society. SirenOpt is pioneering a paradigm shift in materials manufacturing intelligence by leveraging cold atmospheric plasma, machine learning and predictive analytics to non-destructively create a uniquely distinctive, multifaceted material fingerprint in real-time. SirenOpt transforms measurement blind spots into rich multi-layered material insights, which enable intelligent performance-centric decision-making. SirenOpt thus accelerates R&D and process optimization, enhances product performance, and delivers higher production quality to maximize value in both in-line and off-line applications. SirenOpt’s manufacturing intelligence platform has demonstrated use cases across battery, aerospace, semiconductor, electronic and many other advanced manufacturing segments in both inline production and offline tool deployments. SirenOpt was founded in 2022 as a spin-out from the UC Berkeley Chemical Engineering Department. SirenOpt is supported by the UC Berkeley Skydeck, Lawrence Berkeley National Laboratory Cyclotron Road and Activate science-driven startup accelerator programs.
Investor
Oct 2022
Tyba was founded to improve energy storage modeling and operating methods, enabling developers, owners, and operators to optimize their assets and realize greater returns. Renewable energy projects are essential to combat climate change – and secure financial returns for energy producers and investors alike. In a complex and changing environment, Tyba ensures revenue optimization and grid decarbonization can go hand-in-hand.
Investor/Board Member
Jul 2022
Our mission is to transform the heating & cooling of buildings, using geothermal energy to radically reduce costs for people and the environment. Bedrock is building autonomous drilling technology and advanced subsurface simulation software to enable widespread, affordable, and accessible installations of geothermal heating & cooling. Incorporated in 2022, Bedrock has raised $22M in Seed and Series A capital from top investors including Titanium Ventures, Energy Impact Partners, and Wireframe Ventures, and our work has been covered in publications like TechCrunch, Canary Media, and Axios.
Investor/Board
May 2022
Make weather-related decisions in time to matter. Reliable, award-winning 2- to 52-week forecasts for adapting to a more volatile climate.
Investor
Dec 2021
At Terraline we are fully committed to benefiting the planet by disrupting a massive segment of the transportation industry with our clean-sheet, battery-electric, long-range, heavy trucks that are designed to eliminate CO2 emissions.
Investor
Sep 2021
Synop, the leading enterprise platform for EV fleets, is accelerating the transition to commercial electric vehicles by seamlessly connecting vehicles, chargers, and the grid through end-to-end software solutions that optimize EV charging and energy management. Using AI-based platform automation, telematics integrations, and real-time monitoring tools, Synop offers a vendor-agnostic software suite, which includes charging management, energy management (VPP/V2G capabilities), vehicle management, and payment management, to maximize fleet uptime, minimize charging costs, and generate revenue through smart grid participation. To learn more, visit Synop.ai.
Investor
Apr 2021
Gridware is a technology company focused on protecting and enhancing the electrical grid. We pioneered a groundbreaking new class of grid management called active grid response (AGR), focused on monitoring the electrical, physical, and environmental aspects of the grid that affect reliability and safety. Gridware’s advanced active grid response platform uses high-precision mechanical sensors to detect potential issues early, enabling proactive maintenance and fault mitigation. This comprehensive approach helps improve safety, reduce outages, and ensure the grid operates efficiently. The company is headquartered in San Francisco, California, and is backed by climate-tech and Silicon Valley investors. For more information, please visit www.Gridware.io.
Investor/Board Member
Nov 2020
The best way to buy and sell used electric cars. Get battery and range reports on used EVs at https://www.recurrentauto.com.
Investor/Board Member
Jan 2020
Electriphi, Inc. is an award-winning technology company based in Silicon Valley, California. The company provides software and services to simplify the transition to electric vehicle fleets while saving time and costs for customers. Electriphi’s solutions span fleet electrification planning, deployment, and operational energy management, with customers and partners across the U.S. and internationally Electriphi is a wholly-owned subsidiary of Ford Pro.
Investor
2019
We’re on a journey to Grow the Future of Materials. How? By unlocking the unique properties of mycelium, the root structure of mushrooms. Our patented technology, Fine Mycelium™, unleashes a new class of materials crafted from nature, engineered for performance, and built for a resilient future. Our impact on future generations steers our innovations today. From our expertise in mycology and materials science to our manufacturing innovations, we’re creating new possibilities for industry. We’re an outstanding team of scientists, engineers, product experts, artists, leaders—and you.
Board Member
2019
Impact Capital Managers (ICM) is a membership association of 100+ leading private capital fund managers seeking superior returns and meaningful impact across North America and beyond. Our mission is to advance the performance of our members and to grow the marketplace with integrity and authenticity. Our community is invitation only; members must meet certain criteria including adherence to our standards on impact management and measurement. ICM is also the proud organizer of the Mosaic Fellowship, which places top-performing graduate students from traditionally underrepresented backgrounds at leading impact funds each summer. Additionally, in collaboration with Achieve Partners, ICM co-produces the Better Money, Better World podcast.
Investor/Board Member
Dec 2018
Enabling electrification for all ⚡
Investor
May 2018
We're building the connected, automated, and multimodal intersections of the future
Show all 24 investments ↓
Experience · 30 entries
All (30)
Investments (25)
Founder (1)
Board (11)
2025
Investor
May 2025
Ezra is the connective infrastructure for private credit and asset-backed finance. We help companies raising $10M–$250M+ in asset-backed and project financing connect with institutional lenders, credit funds, and broker-dealers actively deploying capital. For companies, Ezra helps structure deal materials, anticipate diligence questions, and approach investors with confidence. For lenders and intermediaries, Ezra surfaces qualified private credit opportunities and helps originate deals faster. Our team previously helped raise and deploy $15B+ in asset-backed finance at Mosaic and other companies. If youre raising capital or sourcing deals, wed love to connect.
Investor
Jan 2025
C.Scale is a software platform enabling architects and building owners to make data-driven decisions throughout the design process, driving down both costs and whole life carbon emissions. Leveraging data on thousands of buildings in planning and design, the platform connects supply and demand for high-performance, low-carbon products in the fragmented, $1 trillion building materials market. C.Scales AI/ML-powered platform that solves a critical supply chain inefficiency: connecting building product manufacturers directly with designers at the point of specification. As regulation and owners seeking higher performance buildings drive demand for low-carbon products, C.Scale enables architects to make streamlined, data-driven design and procurement decisions while helping manufacturers reach qualified buyers. C.Scale utilizes building life cycle assessment to give a holistic description of a building’s materials, systems, and environmental impacts. The company’s unique AI/ML toolkit gives designers and owners the ability to evaluate the impacts of their decisions from the very beginning of the project. For manufacturers, the platform will offer a flow of high-quality leads by tracking detailed material quantities and carbon performance requirements from the earliest project phases, while providing visibility into the design process from concept through construction. In the past six months, hundreds of enterprise customers have modeled over 1,200 projects representing more than 120 million square feet of construction in C.Scale. These customers include 2 of the top 3 largest architecture firms in North America and 9 AIA Firm Award recipients. Global corporations, including Autodesk and Schneider Electric, are integrating C.Scale into their products and platforms. And Stanford University is piloting the platform to align building planning and procurement with long-term campus commitments.
2023
Investor
Jul 2023
SirenOpt is accelerating sustainable and smart manufacturing of advanced materials by delivering a manufacturing intelligence platform that uses intelligent characterization and real-time decision-making to drive the creation of innovative, high-performance products that fuel the advancement of society. SirenOpt is pioneering a paradigm shift in materials manufacturing intelligence by leveraging cold atmospheric plasma, machine learning and predictive analytics to non-destructively create a uniquely distinctive, multifaceted material fingerprint in real-time. SirenOpt transforms measurement blind spots into rich multi-layered material insights, which enable intelligent performance-centric decision-making. SirenOpt thus accelerates R&D and process optimization, enhances product performance, and delivers higher production quality to maximize value in both in-line and off-line applications. SirenOpt’s manufacturing intelligence platform has demonstrated use cases across battery, aerospace, semiconductor, electronic and many other advanced manufacturing segments in both inline production and offline tool deployments. SirenOpt was founded in 2022 as a spin-out from the UC Berkeley Chemical Engineering Department. SirenOpt is supported by the UC Berkeley Skydeck, Lawrence Berkeley National Laboratory Cyclotron Road and Activate science-driven startup accelerator programs.
2022
Investor
Oct 2022
Tyba was founded to improve energy storage modeling and operating methods, enabling developers, owners, and operators to optimize their assets and realize greater returns. Renewable energy projects are essential to combat climate change – and secure financial returns for energy producers and investors alike. In a complex and changing environment, Tyba ensures revenue optimization and grid decarbonization can go hand-in-hand.
Investor/Board Member
Jul 2022
Our mission is to transform the heating & cooling of buildings, using geothermal energy to radically reduce costs for people and the environment. Bedrock is building autonomous drilling technology and advanced subsurface simulation software to enable widespread, affordable, and accessible installations of geothermal heating & cooling. Incorporated in 2022, Bedrock has raised $22M in Seed and Series A capital from top investors including Titanium Ventures, Energy Impact Partners, and Wireframe Ventures, and our work has been covered in publications like TechCrunch, Canary Media, and Axios.
Show all 30 entries ↓
Investment activity
2001–2025 · 25 investments
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