As of 8 Nov 2026, Mafix has raised $5.4M across 1 verified round on record; latest: $5.4M pre-seed round led by Azolla Ventures, announced 20 Aug 2026.
3 sources
The specific company release and its republished version agree on the $5.4M pre-seed round announced on 2026-08-20, led by Azolla Ventures. The roundup also identifies the round but abbreviates Plug and Play Ventures as “Plug and Play” and does not list the other participants; the company release's fuller investor wording is used.
| Round | Amount | Announced | Lead | Buzz |
|---|---|---|---|---|
| Pre-seed [ REPORTED LATER ]: This round was announced before Fireround first saw it. It stays in the company's history, not in Latest, Trending, or alerts. | $5.4M | 2026-08-20 | Azolla Ventures | No recent discussion |
3 sources [ VERIFIED · CORRECTED ] read against 3 sources The specific company release and its republished version agree on the $5.4M pre-seed round announced on 2026-08-20, led by Azolla Ventures. The roundup also identifies the round but abbreviates Plug and Play Ventures as “Plug and Play” and does not list the other participants; the company release's fuller investor wording is used. | ||||
Mafix turns abundant silicate rocks into fast-weathering, carbon-negative silicon fertilizer for farmers, using enhanced rock weathering to improve yields while removing CO2.
Mafix is betting that activated silicate minerals can weather within a growing season, release plant-available silicon that supports crop resilience and yields, and convert atmospheric CO2 into stable bicarbonate, addressing both slow carbon-removal measurement and soil degradation. Its $5.4 million pre-seed round is intended to produce 1,000 tons for larger trials, while the use of spare cement-kiln capacity is the company's bet on scaling without a costly new first-of-a-kind plant.
Checked against 9 sources on Sep 23
Also named as backers in company research: Stanford Office of Technology Licensing High-Impact Technology Fund (HIT Fund)