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Q3 2025 Rankings
Climate tech engineering activity is concentrated in grid software and carbon accounting tooling.
Key Takeaway
In Q3 2025, 2 of 5 tracked climate tech startups show positive engineering acceleration. nco leads with 5 commits over 14 days (+150% change). The dominant signal pattern is "Framework migration". Average sector commit velocity is 45 commits per 14-day window. These engineering momentum signals have historically preceded fundraise announcements by three to six weeks.
Data sourced from public GitHub activity. Read our methodology
| # | Company | Stage | Geo | Commits (14d) | Change | Contributors | Contrib. Growth | New Repos | Signal |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ncoView signal profile → | Series A/B | Unknown | 5 | +150% | 24 | +220% | 0 | Engineering hiring burst |
| 2 | ESCOMPView signal profile → | Growth | Unknown | 116 | +25% | 61 | +0% | 0 | Framework migration |
| 3 | carbon-design-system An open-source design system built by IBM. View signal profile → | Growth | US | 86 | -1% | 100 | +9% | 1 | Framework migration |
| 4 | CliMA The next generation of climate models. Built in the open. View signal profile → | Growth | US | 16 | -58% | 81 | +0% | 0 | Framework migration |
| 5 | opennem Formerly OpenNEM, Open Electricity aims to make the wealth of public energy data more accessible View signal profile → | Seed | APAC | 3 | -81% | 9 | +121% | 0 | Engineering hiring burst |
Sorted by commit velocity change (14-day window, descending). Top 3 highlighted. Data last updated Q3 2025.
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By signal type in this sector
By stage
In Q3 2025, we are tracking 5 climate tech startups with measurable GitHub engineering signals. 2 of 5 show positive commit velocity growth. The most common signal type is "Framework migration", observed in 3 of the tracked companies. The average 14-day commit velocity across the sector is 45 commits, with nco leading at 5 commits (+150% change). These patterns have historically preceded fundraise announcements by three to six weeks.
nco leads the climate tech sector in Q3 2025 with 5 commits over a 14-day window, representing a +150% change from the prior period. With 24 active contributors, nco is showing a "Engineering hiring burst" pattern — one of the more reliable leading indicators of a significant product milestone or fundraise.
Among the 5 climate tech startups we track, US accounts for the highest concentration with 2 teams. Startups developing clean energy, carbon monitoring, and climate adaptation technologies. Geographic distribution matters for investors because engineering talent clusters correlate with sector-specific domain expertise and proximity to early adopter customers.