Facts
- Sectors
- Industrial technology, Agriculture, Climate / Carbon removal, Fertilizer
- Stage
- Pre-seed
Mafix raises $5.4M pre-seed led by Azolla Ventures to commercialize carbon-negative silicon fertilizers
Mafix, a Seattle-based maker of carbon-negative silicon fertilizers and mineral products, raised $5.4M in a pre-seed round led by Azolla Ventures on August 24, 2026. The company will use proceeds to demonstrate production of 1,000 tons of fertilizer, scale its mineral conversion process across feedstocks, and develop next-generation products.
Mafix raises $5.4M pre-seed to commercialize silicon fertilizer that boosts soil health and removes CO2
Mafix, a Stanford spin-out, raised $5.4 million in a pre-seed round to scale production of a silicon-based fertilizer that speeds silicate rock weathering for soil and crop benefits and can convert CO2 to stable bicarbonate. The Seattle agtech will use cement kilns to produce at least 1,000 tons for larger field trials while leveraging idle kiln capacity to reduce scale-up costs.
Mafix raises $5.4M pre-seed led by Azolla Ventures to commercialize carbon‑negative silicon fertilizers and scale a 1,000‑ton demo
Mafix, a Stanford-developed industrial startup, raised $5.4M in pre-seed funding led by Azolla Ventures to commercialize a proprietary process that converts abundant silicate rocks into carbon-negative silicon fertilizers; the company will produce a 1,000-ton demonstration batch to restore soil health, boost yields, and sequester CO2 as stable bicarbonate.
By Mafix
Mafix raises $5.4M pre-seed to commercialize Stanford tech turning rocks into carbon‑negative silicon fertilizer
Mafix raised $5.4 million in pre-seed funding to commercialize a Stanford-developed process that converts abundant silicate rocks into carbon-negative silicon fertilizers which boost yields, restore soil health, and sequester CO2. The funding will fund a commercial demonstration to produce 1,000 tons of the fertilizer and scale a drop-in process using spare cement kiln capacity.
