Funded Sustainability Startups
Among the 50 recently funded sustainability startups shown, the largest disclosed round is AirCapture’s $50M (2025-06-05), which stands far above the next-…
Among the 50 recently funded sustainability startups shown, the largest disclosed round is AirCapture’s $50M (2025-06-05), which stands far above the next-largest disclosed amounts in the same listing (e.g., Parallel Systems’ $38M on 2025-04-14 and Endera’s $36M on 2025-02-11). At the low end, the smallest disclosed amount is The ReCollective’s $10K (2025-05-01), creating a wide disclosed-range spread.
The dates cluster heavily in 2025: 15 rounds fall between 2025-04-22 and 2025-08-11, with multiple mid-year entries concentrated around $21M–$55M (Blue Whale Materials $55M on 2024-09-20; Water Intelligence $21M on 2024-08-13). Geography is dispersed rather than hub-like, with no single city repeating; however, California appears multiple times (AirCapture in Berkeley, Endera and Water Intelligence in San Diego/Palm Springs, and Mill in San Bruno). Stage and disclosure are mixed: “undisclosed” appears 11 times, while “Series Unknown” appears 18 times, indicating that only a portion of rounds provide comparable amount-and-stage signals.
Most recent rounds
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Frequently asked
What’s the biggest disclosed round in this sustainability list, and how does it compare to the rest of the disclosed amounts?
AirCapture’s $50M (2025-06-05) is the largest disclosed amount across the 50 rows. It is notably higher than the next-largest disclosed entries such as Parallel Systems at $38M (2025-04-14) and Endera at $36M (2025-02-11).
Are there any tight timing clusters among the most recent rounds?
Yes. Several rounds land in a compressed 2025 window: for example, CERT Systems (undisclosed) on 2025-08-11; RecycleSmart $890K on 2025-07-03; Amazonica $2M on 2025-07-01; and AirCapture $50M on 2025-06-05. Earlier, 2024 also shows a dense streak in December (Acceleron Fusion $24M on 2024-12-03; Everest Carbon $3M on 2024-12-02).
Which rounds look like outliers on disclosed size?
The top-end outlier is AirCapture’s $50M (2025-06-05), while the bottom-end outlier is The ReCollective’s $10K (2025-05-01). Most other disclosed rounds sit between smaller seed/angel amounts like $250K–$4M (e.g., Proxxy $250K on 2023-05-26; Carbonaix $500K on 2024-04-15) and large-scale rounds in the $20M–$55M band (e.g., Blue Whale Materials $55M on 2024-09-20; Water Intelligence $21M on 2024-08-13).
Does the list show an over-representation of particular stages or disclosure types?
Disclosure is heavy-tailed: “undisclosed” appears 11 times and “Series Unknown” appears 18 times across 50 rows, leaving fewer rows with both a stated stage and disclosed amount. Where amounts and stages are stated, larger rounds show up in defined stages such as Series B (Parallel Systems $38M on 2025-04-14) and Series A (AirCapture $50M on 2025-06-05; Acceleron Fusion $24M on 2024-12-03).
Which geographies recur, if any, and are there repeated cities by name?
The list is geographically broad rather than city-concentrated, with no single city repeating by name. However, California shows up multiple times across different cities/states entries, including AirCapture (Berkeley), Endera (San Diego) and Water Intelligence (Palm Springs), plus Mill (San Bruno) on 2023-01-17.
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