Investor Due Diligence Report
Author Circle is a community of experts and professionals turning their knowledge into an authority-building book and their book into a business using my 90-Day Authority-to-Business Blueprint.
2K
60 paid
0%
Insufficient data
12 of 30 days needed
Pricing
$95/mo
$100/yr annual option
$2K
60 paid subs
$2K/mo – $2K/mo(±0%)
4.6
15.8
1.02%
(comments + likes) / subscribers
Weekly
1.4 posts/week
64/100
Consistent (~5.8d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| a16z speedrun | 168K | +0.9% | Free | substack |
| Admired Leadership Field Notes | 110K | +0.5% | $40/mo | substack |
| The Business Engineer | 90K | N/A | $99/mo | substack |
| The Storytelling Edge | 33K | N/A | $6/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 2K | $1,854 | — |
| Mar 2026 | 2K | $1,854 | ~0% |
Platform Dependency
Hosted on substack subdomain
Publishing Consistency
Variable publishing frequency
Key Person
Single-author publication — key-person dependency
Audience Concentration
Consistent engagement across posts
Subscriber threshold
2K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 676 similar-size peers in Business have paid tiers
Pricing position
$95/mo vs $145.85/mo category average (1506 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $95 | $100 |
| Mar 2026 | $41 | $100 |
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 | 30/100 | 25% |
| Publishing Consistency | 36/100 | 10% |
| Hapitalist |
| 33K |
| +2.0% |
| $50/mo |
| substack |
Revenue Model
Active paid subscription tier