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S3 Image Optimizer vs AJAX Thumbnail Rebuild

Head-to-head on the signals that matter, from the public WordPress.org data.

AJAX Thumbnail Rebuild is the safest pick: health A · 90 against 83 for S3 Image Optimizer, led by stronger rating quality.

Active-install trajectory

S3 Image Optimizer moved down one install band, 200+ to 100+. That's a single step across the whole window, so there's no trajectory to draw. The download trend below moves daily.

Metric	S3 Image Optimizer	AJAX Thumbnail Rebuild
Active installs Modeled from the public "N+" band and recent downloads.	100–200	30K–40K ✓
Active installs, change over ~6 months Compares the public install bands. One band step shows as the band change, not a percentage.	200+ → 100+	Stable ✓
Overall health	B · 83	A · 90 ✓
Maintenance How recently the plugin was updated.	99/100	100/100 ✓
Rating quality Volume-adjusted review quality.	74/100	93/100 ✓
Support Share of forum threads marked resolved.	70/100	70/100
Rating (weighted for review count)	4.0★	4.7★ ✓
Reviews	1	90 ✓
Ranking optimization How well the listing is tuned to rank on wp.org.	88/100	98/100 ✓
Removal risk Maintenance signals that precede a wp.org closure. Not an official status.	Low	Low
Last updated	3mo ago	2mo ago ✓
Downloads, last 30d	398	6.4K ✓
Download momentum, last 30d vs prior 30d Dips that follow a release spike are normal: wp.org counts every update as a download, so the weeks after a release run lower.	+35%	-12%
Install conversion Active installs over lifetime downloads. Downloads include every update, so older and more frequently released plugins read lower.	0.5%	3.3% ✓
Category	Performance	Performance

✓ marks the stronger plugin on each row. Rows where they're level show no marker.

Release activity

S3 Image OptimizerAJAX Thumbnail Rebuild

7-day average daily downloads. Downloads spike for about a week after each release as the install base re-downloads, so read this as release cadence, not growth.