Best Climate newsletters to sponsor in 2026
Updated July 15, 2026 · Newsletter Insights
We track 184 active Climate newsletters across Substack, Beehiiv, and Ghost. Of those, 21 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 (21)
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HEATED
141K subscribers · substack
Recent advertisers: Senators Jeff Merkley
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The Crucial Years
126K subscribers · substack
Recent advertisers: Toyota, BP, Outside magazine
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Volts
94K subscribers · substack
Recent advertisers: RMI
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Your Dose of Climate Hope
38K subscribers · substack
Recent advertisers: Colossal or somehow involved, Conservation International has been, Hyundai
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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: Conservation International has been, Colossal or somehow involved, Chinese Capital
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NY Climate Tech by Alec Turnbull & Sonam Velani
13K subscribers · substack
Recent advertisers: Cond
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Dana Thomas
11K subscribers · substack
Recent advertisers: Another Tomorrow, Another TomorrowGet full access, Chlo
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Irina Slav on energy
7K subscribers · substack
Recent advertisers: G7, Frans Timmermans
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Decouple
3K subscribers · substack
Recent advertisers: Henry Ford II
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environMENTAL
3K subscribers · substack
Recent advertisers: Theodore Roosevelt, Charlaticians
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REDD-Monitor
3K subscribers · substack
Recent advertisers: UCRT, Republican representatives from, Merlin
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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: ALIEN MODE, Planet Wild
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Fieldnotes by Sam Rye | Social & Environmental Regeneration
1K subscribers · ghost
Recent advertisers: Ecochallenge.org, ENoLL
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Green Chem Essential
1K subscribers · ghost
Recent advertisers: Beyond Benign
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Climate Rubik
1K subscribers · ghost
Recent advertisers: Psalion, Reliance Jio Access
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Sprawlism
1K subscribers · ghost
Recent advertisers: Alternative Weekly News Foundation, MASTERS
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EcoFriendly West
1K subscribers · ghost
Recent advertisers: Ecojustice, Nature Alberta
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Wildbeauty Days
200 subscribers · substack
Recent advertisers: Rotary International, Dory, Ray Bradbury
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Sustainable Williston
14 subscribers · ghost
Recent advertisers: Nicole Bouffard, Green Mountain Transit, Renewable Energy Vermont
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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Energy Talking Points by Alex Epstein
57K subscribers · substack
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Planet: Critical
32K subscribers · substack
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The Hotshot Wake Up
32K subscribers · substack
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David Gelles
30K subscribers · substack
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A Second Opinion
28K subscribers · substack
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EVMagz
28K subscribers · substack
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Good Climate News
28K subscribers · substack
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WHAT IF WE GET IT RIGHT?
20K subscribers · substack
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Energy & Stuff
19K subscribers · substack
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Predirections
16K subscribers · substack
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