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Q2 2026 · United States
2 climate tech startups based in United States ranked by GitHub engineering acceleration. Filtered from our broader Climate Tech sector rankings.
| # | Company | Stage | Geo | Commits (14d) | Change | Contributors | Contrib. Growth | New Repos | Signal |
|---|---|---|---|---|---|---|---|---|---|
| 1 | carbon-design-system An open-source design system built by IBM. View signal profile → | Growth | US | 97 | -1% | 100 | +9% | 1 | Framework migration |
| 2 | CliMA The next generation of climate models. Built in the open. View signal profile → | Growth | US | 15 | -57% | 81 | +0% | 0 | Framework migration |
Sorted by commit velocity change (14-day window, descending). Data last updated Q2 2026. Geography from GitHub org profiles.
The free Acceleration Watch: five venture-backed teams accelerating on the engineering signal, translated into plain English — 21 to 47 days before the deck circulates. No code-reading, no card.
In Q2 2026, carbon-design-system leads climate tech startups in United States with 97 commits over a 14-day window (-1% change) and 100 active contributors. Across all 2 tracked United States-based startups in this sector, the average 14-day commit velocity is 56 commits. The dominant signal pattern is "Framework migration", which typically indicates significant technical migration, which often precedes a pivot or platform upgrade.
United States accounts for 2 of the climate tech startups in our tracking dataset for Q2 2026. This geographic view filters the broader sector rankings to help investors focused on United States-based deal flow identify engineering acceleration patterns within their target geography. Regional concentrations often reflect local regulatory environments, talent pools, and investor networks that shape startup trajectories differently from global averages.
We derive startup geography primarily from the GitHub organization profile location field, supplemented by a manually curated enrichment database of known startup headquarters. This means startups without a public GitHub location may appear in our global sector rankings but not in geographic filters. The geographic classification uses broad regions (United States, etc.) rather than city-level granularity to provide meaningful sample sizes for comparison.