WordPress plugin comparison
Kraken.io Image Optimizer vs SlashImage
At a glance
- Kraken.io Image Optimizer has more active installs: 10K+, against 90+ for SlashImage.
- On a typical day, Kraken.io Image Optimizer is downloaded about 97 times, SlashImage about 6.
- SlashImage is rated higher: 5.0 out of 5 from 1 review, against 4.5 from 119 reviews.
- SlashImage was updated more recently: Sep 28, 2026, against Jun 22, 2026 for Kraken.io Image Optimizer.
- SlashImage is tested with a newer WordPress: 7.1.4, against 7.0.8 for Kraken.io Image Optimizer.
- Kraken.io Image Optimizer has been around longer: since 2014, against 2026 for SlashImage.
Line by line
Kraken.io Image Optimizer leads on 4 of 7 comparable lines.
| Metric |  Kraken.io Image Optimizer |  SlashImage |
|---|---|---|
| Popular rank | #1,581 | #16,939 |
| Active installs | 10K+ | 90+ |
| Downloads, last 30 days | 4.3K | 173 |
| Rating | 4.5(119) | 5.0(1) |
| Support threads resolved | – | – |
| Tested up to | 7.0.8 | 7.1.4 |
| Search multiplier | ×0.83 | ×0.38 |
| Last release | 4 months ago | 1 month ago |
| Requires PHP | 5.6 | 7.4 |
From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.
Tags they share
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