Johanna Wolfson

Co-founder and General Partner at Azolla Ventures

📍 Greater Boston, United States🔄 Updated October 2026💼 13 investments📅 8 years investing🗓 Last invested Aug 2025𝕏 @upgrade_to_unlock
VC🌍 United States
13
Total investments
6
Early stage
2
Mid stage
1
Late stage
8y
Years active

Portfolio

11 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Aug 2025
Dig Energy develops purpose-built drilling technology to make highly-efficient geothermal heating and cooling systems cost competitive with fossil fuels. Heating and cooling account for 35% of all energy consumption, largely powered by oil and gas today. Geothermal heat pumps are the most energy-efficient HVAC solution available, but adoption is limited by drilling expense and cumbersome equipment. Dig’s compact, mobile drill reduces costs by 80% and promises to dramatically increase adoption worldwide. Learn more at https://dig.energy/.
Board Member
Apr 2024
Vestas mission is to further the science of Coastal Carbon Capture and galvanize global deployment. Coastal Carbon Capture harnesses the power of the oceans to accelerate the Earths natural long-term carbon dioxide removal process and enhance coastal resilience. Vesta is a Public Benefit Corporation, a mission-driven company dedicated to leaving a world in which all can thrive. Part of the funding for our scientific research is from the Coastal Carbon Capture Impact Fund, a 501(c)(3) public charity.
Board Member
Oct 2023
Muon Vision is on a mission to significantly boost the efficiency, safety and sustainability of minerals processing for critical metals. Our technology provides a passive, non-invasive X-ray imaging technology that can be used to i) visualize the percolation of process fluids across leaching heaps at scale; ii) monitor the stability of dams, heaps, mining assets; iii) other industrial and mining applications where density measurements are of key importance to improve safety and productivity.
mid stageMining
Board Member
Jan 2023
Calcarea is committed to sequestering CO2 at scale. We are focused on using the Accelerated Weathering of Limestone (AWL) on large ships to both specifically decarbonize the shipping industry and then to go after all hard to decarbonize sectors of the economy.
Board Member
Aug 2021
Tynt is developing the next generation of smart windows, based on our proprietary reversible metal electrodeposition technology. For the first time, consumers will have perfectly neutral color and 100% blackout/privacy in the dark state, all for a cost similar to adding conventional window treatments.
Board Member
Apr 2021
Powering the future with the Earth’s hidden heat. Geothermal is carbon-free, always-on power but most of the world’s geothermal resources remain undiscovered and undeveloped. Zanskar is changing that. We take a AI and data-driven, scalable approach to geothermal discovery and development combining modern geoscience and advanced field methods to identify and tap into overlooked or underutilized geothermal resources. By making geothermal faster and more predictable to develop, we’re unlocking its potential to deliver gigawatts of clean, firm energy and to become a cornerstone of our future energy system.
Board Member
Apr 2020
Sublime is developing a breakthrough process to make low-carbon cement. The technology replaces the industrys legacy fossil-fuel-intensive thermal calciner process with an electrochemical process that produces low-carbon cement at ambient temperatures with renewable electricity. Sublime was started in 2020, as a spin-out of Yet-Ming Chiangs lab at MIT (Form Energy, A123, American Superconductor, 24M, Desktop Metals).
early stageConstruction
Board Member
Dec 2019
Verdox is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.
Board Observer
Apr 2019
The MicroByre team makes pets out of bacteria. The vast majority of prokaryotes on the planet are not currently considered cultivable, let alone genetically modifiable. MicroByre domesticates and then genetically engineers otherwise reluctant, recalcitrant, and rebellious bacteria. We get them to eat out of our hands. With friends like these, who needs petroleum? Newly cooperative bacteria will help us replace ancient biomass (petrochemicals) with renewable biomass (lawn clippings) efficiently and economically. This isn’t the synthetic biology you’ve read about. We don’t do Escherichia coli and we don’t do Saccharomyces cerevisiae. We don’t do gene circuits and we don’t do heterologous expression. We engineer naturally cool but standoffish bacteria to be cooperative, and thus even cooler. Diversity is strength. We take a lesson from the study of ecology: it takes a lot of different kinds of skills working together with mutual respect to make a dent in the world. We are committed to a maintaining a work environment free of harassment and discrimination. All recruitment, salary, & promotion decisions are based on business need, qualification, and job requirements with no regard to race, ethnicity, gender, sexual orientation, family or parental status, veteran or disability status, religion or belief, or age.
Board Member
Mar 2019
C-Motives mission is to create electric machines that directly lead to reduced carbon emissions through higher efficiency renewable generators applicable to the next generation of e-mobility vehicles and more efficient industrial torque motors. C-Motives unmatched torque, efficiency, and simplicity will lead to a new generation of applications that create more renewable power and waste less electricity. C-Motives motors run on the principle of electrostatic forces, also known as "static cling,"​ and stands to change the machines that shape and run our lives. Our motors produce torque by the same principle of rubbing a balloon on a head of hair. And just like hair doesnt heat up with the balloon, our motors produce torque with nearly zero loss, versus using copper coils wound around steel with rare earth permanent magnets.
Board Observer
Nov 2018
Lilac exists to solve one problem: lithium supply. By engineering scalable lithium extraction technology, we help industries produce lithium faster, cheaper, and cleaner. Our ion exchange technology is rooted in scientific precision and commercial know-how, making lithium supply a non-issue for global electrification. Our materials, engineering, and approach uniquely position us to design and develop commercial projects across various lithium sources. We help lithium producers rapidly and responsibly scale production from brine resources with versatile, cost-effective, and dynamic technology solutions.
Experience · 16 entries
All (16)
Investments (13)
Board (13)
2025
Board Member
Aug 2025
Dig Energy develops purpose-built drilling technology to make highly-efficient geothermal heating and cooling systems cost competitive with fossil fuels. Heating and cooling account for 35% of all energy consumption, largely powered by oil and gas today. Geothermal heat pumps are the most energy-efficient HVAC solution available, but adoption is limited by drilling expense and cumbersome equipment. Dig’s compact, mobile drill reduces costs by 80% and promises to dramatically increase adoption worldwide. Learn more at https://dig.energy/.
Board Member
Feb 2025
BioLumic is a pioneer in plant trait development. We program the genetic expression of plants with light to unlock their natural potential without chemicals or genetic modification. Our novel xTraits(TM) activate untapped biological mechanisms in seeds and seedlings, enhancing yield, vigor, nutrition, and health. With expertise across 12+ crops—including corn, soybean, rice, and forage—BioLumic offers a proprietary solution that brings crop traits to market 90% faster and lower cost. We are dedicated to advancing agriculture by fostering crop equity and resilience while minimizing environmental impact along the value chain.
2024
Board Member
Apr 2024
Vestas mission is to further the science of Coastal Carbon Capture and galvanize global deployment. Coastal Carbon Capture harnesses the power of the oceans to accelerate the Earths natural long-term carbon dioxide removal process and enhance coastal resilience. Vesta is a Public Benefit Corporation, a mission-driven company dedicated to leaving a world in which all can thrive. Part of the funding for our scientific research is from the Coastal Carbon Capture Impact Fund, a 501(c)(3) public charity.
2023
Board Member
Oct 2023
Muon Vision is on a mission to significantly boost the efficiency, safety and sustainability of minerals processing for critical metals. Our technology provides a passive, non-invasive X-ray imaging technology that can be used to i) visualize the percolation of process fluids across leaching heaps at scale; ii) monitor the stability of dams, heaps, mining assets; iii) other industrial and mining applications where density measurements are of key importance to improve safety and productivity.
mid stageMining
Board Member
Jan 2023
Calcarea is committed to sequestering CO2 at scale. We are focused on using the Accelerated Weathering of Limestone (AWL) on large ships to both specifically decarbonize the shipping industry and then to go after all hard to decarbonize sectors of the economy.
Show all 16 entries ↓
Investment activity
2018–2025 · 13 investments
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