SimilarIQ's proprietary look-alike AI found 100 companies similar to substack.com — competitors, look-alikes, and adjacent players, ranked by match score with confidence ratings. Here are the top 10:
| # | Company | Match | Type | Confidence |
|---|---|---|---|---|
| 1 | Medium medium.com |
93 | Direct | 86 |
| 2 | beehiiv beehiiv.com |
85 | Direct | 96 |
| 3 | Ghost ghost.org |
85 | Direct | 96 |
| 4 | Buttondown buttondown.email |
84 | Direct | 89 |
| 5 | Kit convertkit.com |
83 | Direct | 85 |
| 6 | Patreon patreon.com |
81 | Indirect | 84 |
| 7 | Substack substack.net |
71 | Direct | 85 |
| 8 | Reddit reddit.com |
70 | Direct | 95 |
| 9 | Youtube youtube.com |
70 | Direct | 95 |
| 10 | Facebook facebook.com |
69 | Direct | 94 |
SimilarIQ cross-references real search-market data with multiple proprietary AI analyses. Companies confirmed by more independent sources rank higher; every entry carries a 0–100 confidence score. Data refreshes as new searches run.