Q1 2026 Rankings
Climate Tech Startups to Watch, Q1 2026
Climate tech engineering activity is concentrated in grid software and carbon accounting tooling.
Key takeaways, at a glance
In Q1 2026, 3 of 5 tracked climate tech startups show positive engineering acceleration. opennem leads with 31 commits over 14 days (+999% change). The dominant signal pattern is "Engineering hiring burst". Average sector commit velocity is 56 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 | opennem Formerly OpenNEM, Open Electricity aims to make the wealth of public energy data more accessible View signal profile → | Seed | APAC | 31 | +999% | 9 | +121% | 0 | Engineering hiring burst |
| 2 | nco nco is aclimate tech series a/b startup, modernizing their technology stack for scale. View signal profile → | Series A/B | Unknown | 2 | +100% | 24 | +220% | 0 | Engineering hiring burst |
| 3 | carbon-design-system An open-source design system built by IBM. View signal profile → | Growth | US | 100 | +19% | 374 | +9% | 1 | Framework migration |
| 4 | ESCOMP Earth system modeling infrastructure providing climate simulation tools for the scientific research community. View signal profile → | Growth | Unknown | 89 | -9% | 61 | +0% | 0 | Deceleration |
| 5 | CliMA The next generation of climate models. Built in the open. View signal profile → | Growth | US | 58 | -28% | 81 | +0% | 0 | Deceleration |
Sorted by commit velocity change (14-day window, descending). Top 3 highlighted. Data last updated Q1 2026.
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Projected lead-time window
≈21-day lead window
Projected next milestone
Team expansion / round prep
The free Sunday digest puts opennem and 4 other Climate Tech startups this period in context, 14-day acceleration deltas, contributor maps, and the top names not on Crunchbase yet. Five names every Sunday, no card, no code-reading.
Unlock with email →Projections are model estimates derived from each org's public commit signal and the SSRN-published methodology, not statements of fact. Cross-reference with primary sources before acting.
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More views of Climate Tech, Q1 2026
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Q1 2026 vs Q4 2025
How Climate Techcommit velocity has shifted quarter-over-quarter →
By signal type in this sector
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Frequently Asked Questions
What engineering signals are climate tech startups showing in Q1 2026?
In Q1 2026, we are tracking 5 climate tech startups with measurable GitHub engineering signals. 3 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 56 commits, with opennem leading at 31 commits (+999% change). These patterns have historically preceded fundraise announcements by three to six weeks.
Which climate tech startup has the highest engineering acceleration in Q1 2026?
opennem leads the climate tech sector in Q1 2026 with 31 commits over a 14-day window, representing a +999% change from the prior period. With 9 active contributors, opennem is showing a "Engineering hiring burst" pattern, one of the more reliable leading indicators of a significant product milestone or fundraise.
Where are the most active climate tech engineering teams located?
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.