Best Climate newsletters to sponsor in 2026
Updated May 19, 2026 · Newsletter Insights
We track 187 active Climate newsletters across Substack, Beehiiv, and Ghost. Of those, 10 have detected sponsor history — they've run paid sponsorships from real advertisers in the past 12 months. The list below is the top 25 by current subscriber count.
For each newsletter, you can see recent advertisers (linked to a full sponsor history) and click through to the newsletter's detail page for audience metrics, pricing, and growth trends.
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See what's includedClimate newsletters with detected sponsor history (10)
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Your Dose of Climate Hope
38K subscribers · substack
Recent advertisers: Hyundai, Zipline, Chinese Capital
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MCJ Newsletter
37K subscribers · substack
Recent advertisers: Unilever & Cheez, Terra.do, Financeit
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The Weekly Anthropocene
14K subscribers · substack
Recent advertisers: Chinese Capital, Zipline, Bright SaverOne
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NY Climate Tech by Alec Turnbull & Sonam Velani
13K subscribers · substack
Recent advertisers: Cond
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REDD-Monitor
3K subscribers · substack
Recent advertisers: Merlin, Land Life, Pachama
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environMENTAL
3K subscribers · substack
Recent advertisers: Charlaticians
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Energy Security and Freedom
1K subscribers · substack
Recent advertisers: Sher Edling
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The Ecosia Blog
1K subscribers · ghost
Recent advertisers: Planet Wild
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Climate Rubik
1K subscribers · ghost
Recent advertisers: Psalion, Reliance Jio Access
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Wildbeauty Days
200 subscribers · substack
Recent advertisers: Curiosity
Top Climate newsletters by audience size (10)
Largest Climate newsletters in the index that haven't run paid sponsorships in our coverage window. Still worth pitching — they have the audience.
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HEATED
140K subscribers · substack
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The Crucial Years
123K subscribers · substack
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Volts
93K subscribers · substack
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Energy Talking Points by Alex Epstein
57K subscribers · substack
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The Hotshot Wake Up
32K subscribers · substack
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Planet: Critical
32K subscribers · substack
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David Gelles
30K subscribers · substack
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EVMagz
28K subscribers · substack
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Good Climate News
28K subscribers · substack
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A Second Opinion
28K subscribers · substack
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