Engineering Prompts
Investor Due Diligence Report
substackAI
Figuring out the age of AI in real time.
3K
300 paid
N/A
Pricing
$5/mo
$50/yr annual option
$1K
300 paid subs
$1K/mo – $1K/mo(±0%)
Unknown
0.0 posts/week
Score based on available components only.
| Component | Score | Weight |
|---|---|---|
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| One Useful Thing | 486K | +0.6% | $10/mo | substack |
| Sabrina Ramonov 🍄 | 300K | +2.2% | Free | substack |
| ChatGPT for Education | 257K | +2.2% | Free | substack |
| AI Supremacy | 226K | -0.2% | $8.75/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Mar 2026 | 3K | $1,192.5 | — |
| Apr 2026 | 3K | $1,192.5 | ~0% |
Platform Dependency
Hosted on substack subdomain
Key Person
Single-author publication — key-person dependency
Revenue Model
Active paid subscription tier
Subscriber threshold
3K subscribers — above the 3K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
73% of 156 similar-size peers in AI have paid tiers
Pricing position
$5/mo vs $5/mo category median (420 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $5 | $50 |
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.
| Paid Subscriber Ratio |
| 90/100 |
| 25% |
| 213K |
| N/A |
| $5.99/mo |
| substack |