Q4 2026 · Europe
Climate Tech Startups in Europe to Watch, Q4 2026
3 climate tech startups based in Europe 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 | hacf-fr French speaking community for Home-Assistant | Communauté francophone pour Home-Assistant View signal profile → | Growth | EU | 28 | -15% | 75 | +174% | 0 | Deceleration |
| 2 | climateconnect The platform to connect and aggregate climate initiatives across the planet. View signal profile → | Series A/B | EU | 17 | -19% | 40 | +0% | 0 | Deceleration |
| 3 | green-coding-solutions We create open source tools to measure software energy consumption View signal profile → | Seed | EU | 13 | -55% | 15 | +0% | 2 | Deceleration |
Sorted by commit velocity change (14-day window, descending). Data last updated Q4 2026. Geography from GitHub org profiles.
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Frequently Asked Questions
Which climate tech startups in Europe are showing the strongest engineering signals in Q4 2026?
In Q4 2026, hacf-fr leads climate tech startups in Europe with 28 commits over a 14-day window (-15% change) and 75 active contributors. Across all 3 tracked Europe-based startups in this sector, the average 14-day commit velocity is 19 commits. The dominant signal pattern is "Deceleration", which typically indicates significant technical migration, which often precedes a pivot or platform upgrade.
How does the Europe climate tech startup ecosystem compare to other regions?
Europe accounts for 3 of the climate tech startups in our tracking dataset for Q4 2026. This geographic view filters the broader sector rankings to help investors focused on Europe-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.
How is startup geography determined in these rankings?
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 (Europe, etc.) rather than city-level granularity to provide meaningful sample sizes for comparison.