eComEngine vs Perpetua (formerly Sellics)
Side-by-side from the Top 11 ranking of The 11 Best Amazon Seller Tools. Last verified June 12, 2026.
The short answer
eComEngine ranks higher on Top 11 (#9 vs #10) for Amazon FBA sellers managing listings and ads. Market leader for automating feedback and product review requests.
At a glance
| eComEngine | Perpetua (formerly Sellics) | |
|---|---|---|
| Top 11 rank | #9 / The 11 Best Amazon Seller Tools | #10 / The 11 Best Amazon Seller Tools |
| Score (out of 9.4) | 7.6 | 7.4 |
| Best for | Specialized feedback & inventory tools | Multi-channel retail media advertising |
| Pricing | $$ ($29 to $249/mo) | $$$$ (Starts at $250+/mo) |
| HQ | Richmond, USA | Toronto, Canada |
| Founded | 2007 | 2014 |
Perpetua (formerly Sellics)
Sophisticated, multi-channel advertising optimization for large brands.
perpetua.ioMethodology and scoring weights live at /methodology. No vendor pays for placement — see about.