Venture-Backed Startups

Carbonova uses a patented catalytic process to convert captured CO2, methane, and waste heat from manufacturing emissions into carbon nanomaterials. These net-negative nanomaterials are supplied to industries such as plastics/composites, lithium-ion batteries, and construction to improve material strength, durability, and performance.

3 investors

Valorize develops AeroChar, a pH-modified biochar engineered to retain nitrogen, phosphorus, and moisture and control ammonia in poultry, livestock, and composting operations. The company also qualifies and modifies biochar for growing media, anaerobic digestion, and steel applications, and acts as a commercialization partner for biochar producers handling carbon compliance, certification, and buyer matching.

1 investor

CarbonPoint Solutions (founded in 2011 as Enhanced Energy Group) develops carbon capture technology that concentrates and captures CO2 from reciprocating engines and gas turbines at distributed power system scale, using its patented Semi-Closed Cycle (SCC) and CO2-TSA processes originally derived from U.S. Navy undersea propulsion technology. The company was acquired by Caterpillar Inc. in September 2021.

1 investor

CarbonPool provides insurance products for carbon credit projects, covering unexpected carbon credit shortfalls and reversal events caused by natural catastrophes, weather, disease, and machine breakdown, and compensates clients with high-quality carbon credits. Its clients are project developers, corporate buyers, and investors in carbon credits, and it offers products such as carbon shortfall insurance, carbon reversal insurance, and planting insurance cover, including a solution aligned with Verra's Durability Pilot.

4 investors

CarbonQuest provides a modular Distributed Carbon Capture System (DCCS) that captures, liquefies, and monetizes CO2 onsite for biogas/RNG facilities, food and beverage manufacturers, and onsite low-carbon power generation. The company combines proprietary hardware, AI-powered software, project financing, and a pre-built CO2 offtake network across the US and Canada into a single turnkey service.</parameter> <parameter name="founders">[]

1 investor

Carbon Revolution is a Tier 1 OEM supplier that designs and manufactures lightweight carbon fibre wheels for the automotive industry. It supplies wheel programs to performance and premium car brands including Ford, Ferrari, General Motors, Jaguar Land Rover, Renault and Lamborghini.

1 investor

Carbonsate operates biomass storage projects that collect low-value waste wood — such as invasive bush, forestry residues, and sawmill byproducts — and seal it in engineered underground chambers to lock away carbon for centuries, generating verified carbon removal credits. It serves companies buying carbon removal and landowners with woody residues, with active projects in Namibia.

1 investor

CarbonSifr, based in the UAE, offers a platform that lets businesses add carbon reduction and offsetting into their existing operations. The approach follows an e-commerce model, packaging decarbonization services so companies can adopt them without building programs from scratch.

1 investor

CarbonStrong develops a lower-carbon alternative to ordinary cement designed as a drop-in solution requiring no new infrastructure. It supplies ready-mix concrete producers and block and paver manufacturers, positioning its product as cheaper and more durable than conventional cement.

1 investor

Revora Materials operates a technology platform that recovers critical minerals such as magnesium, nickel, manganese, platinum group metals, and rare earth elements from industrial byproducts and ores, including mine tailings, slag, and cement-making residues. The company also converts alkaline feedstocks and CO₂ into construction materials, targeting heavy industry and domestic critical mineral supply chains.</parameter> <parameter name="founders">[{"full_name": "Sravanth", "title": "Co-Founder & CEO"}, {"full_name": "Hassnain", "title": "Co-Founder & Senior Director of Engineering"}, {"full_name": "Greeshma Gadikota", "title": "Co-Founder"}]

1 investor

CarbonTrail provides AI-powered carbon accounting software that turns business financial and activity data (via Xero integration or CSV uploads) into emissions measurements, reduction guidance, and reports aligned with ISO14064-1 and the GHG Protocol. It serves businesses seeking to measure and reduce their carbon footprint, with a focus on the New Zealand market and its "Cohorts" peer-learning program.

1 investor

Carbontribe offers software combining AI, satellite imagery, computer vision, scientific methodologies, and Web3 to measure environmental and social impact and generate tamper-proof, third-party audited digital impact assets. It serves project developers and buyers seeking transparent, verifiable carbon and impact assets.

2 investors

Carbon Voice offers a mobile app for listening and replying to voice messages. The site provides iOS and Android downloads but gives little detail about the product beyond voice-based messaging.

1 investor

Carbonwave develops plant-based biomaterials from seaweed, specifically harvesting brown seaweed (Sargassum) blooms from coastal ecosystems to produce upcycled materials for commercial and local use. The company addresses environmental degradation in tropical and subtropical coastal regions while supplying sustainable alternatives to conventional materials.

2 investors

0 investors

ClimeFi advises corporate carbon-credit buyers, representing buyers' interests to help them find carbon removal projects and negotiate terms. It operates as a buyer-focused intermediary in the voluntary carbon markets.

1 investor

CarbonX manufactures a battery anode material, made using a patented emulsion feedstock technology, intended to replace graphite in batteries. The company positions its product as a way to reduce reliance on geopolitically exposed supply chains for battery production.

1 investor

Carbonyx develops proprietary technology to recover valuable materials from waste rock while permanently removing carbon from the atmosphere, producing carbon-negative and low-carbon materials for infrastructure and supply chains. The company's modular production systems operate under mild conditions and can be deployed near mining, construction, and manufacturing sites.

2 investors

Colombia-based venture that built an in-house growth team with support from Seedstars' value creation platform.

1 investor

0 investors

Carbyne builds cloud-native, all-in-one call-handling and emergency data coordination software for public safety agencies and emergency call centers. Its platform supports i3 (IP) infrastructure and real-time communication between citizens, call centers, first responders, and government entities to reduce response times.

2 investors

Carbyon develops direct air capture technology to remove CO2 from the atmosphere and supply it as circular CO2. The company is working toward its first demonstrator and scaling manufacturing capacity for its capture systems.

8 investors

Carching is a mobile app that rewards drivers in Klang Valley for their daily driving by connecting them with brands for vehicle wraps and advertising campaigns. Users earn money (up to RM500/month) simply by driving their normal routes with branded car wraps, without requiring ride-sharing or delivery work.

1 investor

Carcinotech develops 3D bioprinted tumour models using established cancer cell lines and fresh patient-derived tissue, offering assay-ready formats for drug testing, precision medicine, and preclinical oncology research. It also provides scientific services such as assay design and execution for researchers evaluating cancer therapeutics.

2 investors