Investor Due Diligence Report
I'm the founder and CEO of Mongabay, a non-profit that covers issues at the intersection of people and nature via a global network of local reporters. I also write and take pictures.
2K
140 paid
N/A
Insufficient data
16 of 30 days needed
Pricing
$8/mo
$60/yr annual option
$743.4
140 paid subs
$743/mo – $743/mo(±0%)
3.8
17.3
1.05%
(comments + likes) / subscribers
Weekly
1.2 posts/week
70/100
Consistent (~7.0d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| MCJ Newsletter | 37K | N/A | Free | substack |
| Planet: Critical | 32K | N/A | $8/mo | substack |
| David Gelles | 30K | N/A | Free | substack |
| A Second Opinion | 28K | N/A | Free | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 2K | $1,062 | — |
| Mar 2026 | 2K | $1,062 | ~0% |
| Apr 2026 | 2K | $1,062 | ~0% |
Platform Dependency
Hosted on substack subdomain
Publishing Consistency
Regular publishing schedule
Key Person
Single-author publication — key-person dependency
Audience Concentration
Some posts outperform significantly
Subscriber threshold
2K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 86 similar-size peers in Climate have paid tiers
Pricing position
$8/mo vs $10.45/mo category average (192 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $8 | $60 |
Disclaimer: This report is generated automatically based on publicly available data and proprietary estimation models. Estimated subscriber counts are derived from engagement patterns and should be verified through direct disclosure. Revenue estimates are based on known pricing and estimated paid subscriber counts. This report is for informational purposes only and should not be the sole basis for investment decisions.
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Engagement Rate | 100/100 | 30% |
| Paid Subscriber Ratio | 75/100 | 25% |
| Publishing Consistency | 44/100 | 10% |
| 28K |
| N/A |
| Free |
| substack |
Revenue Model
Active paid subscription tier