Mushroom Head
Investor Due Diligence Report
by Claire Barliant
ghostBusiness
A blog/newsletter featuring comics about life, literature, art, parenthood, and myriad other subjects, by Claire Barliant.
Investor Due Diligence Report
by Claire Barliant
A blog/newsletter featuring comics about life, literature, art, parenthood, and myriad other subjects, by Claire Barliant.
7K
~0%
Subscriber count is a platform estimate
Pricing
$10/mo
$120/yr annual option
$5K
~490 est. paid subs
$2K/mo – $7K/mo(±50%)
1.4
0.02%
(comments + likes) / subscribers
Bi-weekly
0.6 posts/week
75/100
Consistent (~13.0d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| Write • Build • Scale | 44K | N/A | $20/mo | substack |
| Shreyas Free Newsletter | 43K | N/A | Free | substack |
| Positioning with April Dunford | 40K | N/A | Free | substack |
| The Inside Man | 29K | N/A | Free | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 3K | $2,100 | — |
| Mar 2026 | 4.5K | $3,150 | +50.0% |
| Apr 2026 | 5K | $3,500 | +11.1% |
Platform Dependency
Uses ghost platform
Publishing Consistency
Regular publishing schedule
Key Person
Single-author publication — key-person dependency
Audience Concentration
Consistent engagement across posts
Subscriber threshold
7K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 215 similar-size peers in Business have paid tiers
Pricing position
$10/mo vs $7/mo category median (1529 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Feb 2026 | $10 | $120 |
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.
| Component | Score | Weight |
|---|---|---|
| Engagement Rate | 32/100 | 30% |
| Publishing Consistency | 69/100 | 10% |
| Product Life |
| 27K |
| N/A |
| Free |
| substack |
Revenue Model
Active paid subscription tier