Wonder Tools
Investor Due Diligence Report
by Jeremy Caplan
substackTechnology
Wonder Tools helps you discover the most useful sites and apps.
86K
5.7K paid
~0%
Subscriber count is a platform estimate
Insufficient data
29 of 30 days needed
Pricing
$8/mo
$75/yr annual option
$35K
5.7K paid subs
$35K/mo – $35K/mo(±0%)
5.1
38.0
0.05%
(comments + likes) / subscribers
Weekly
1.0 posts/week
90/100
Very Consistent (~7.2d avg)
| Newsletter | Subscribers | Weekly Growth | Price | Platform |
|---|---|---|---|---|
| The System Design Newsletter | 239K | +0.3% | $17.5/mo | substack |
| [ Center for Humane Technology ] | 181K | +0.4% | Free | substack |
| The Developing Dev | 105K | N/A | Free | substack |
| Coding Challenges | 93K | N/A | $8/mo | substack |
| Month | Subscribers | Est. Revenue | Change |
|---|---|---|---|
| Feb 2026 | 83K | $48,078.79 | — |
| Mar 2026 | 84K | $48,658.05 | ~0% |
| Apr 2026 | 85K | $49,237.31 | ~0% |
| May 2026 | 86K | $49,816.58 | ~0% |
| Jun 2026 | 86K | $49,816.58 | ~0% |
Platform Dependency
Hosted on substack subdomain
Publishing Consistency
Regular publishing schedule
Key Person
Single-author publication — key-person dependency
Audience Concentration
Consistent engagement across posts
Subscriber threshold
86K subscribers — above the 2K category median for first paid tier
Has paid tier
Active paid subscription offering
Peer monetization
100% of 27 similar-size peers in Technology have paid tiers
Pricing position
$8/mo vs $5/mo category median (783 newsletters)
| Date | Monthly | Annual |
|---|---|---|
| Mar 2026 | $8 | $75 |
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 | 67/100 | 30% |
| Paid Subscriber Ratio | 90/100 | 25% |
| Publishing Consistency | 89/100 | 10% |
| Internal Tech Emails |
| 59K |
| N/A |
| $10/mo |
| substack |
Revenue Model
Active paid subscription tier