ProRank vs ShortPixel
ProRank matches ShortPixel on JPEG (79.4% vs 78.9%) and edges ahead on WebP (84.3% vs 82.9%) — plus includes caching, SEO, and schema at no extra cost.
ProRank Premium
- JPEG 79.4% via Google cjpegli — matches ShortPixel
- WebP 84.3% — 1.4pp ahead of ShortPixel
- AVIF 91.7% — best-in-class next-gen format
- JPEG XL support (55.9%) — rare among WP plugins
- Includes caching, SEO, schema — no extra plugins
- Flat annual fee with image quotas (5K–100K/yr by plan)
ShortPixel
- Excellent JPEG compression (78.9%)
- Strong WebP compression (82.9%)
- AVIF conversion available
- Credit-based pricing ($4.99/mo for 5K credits)
- No caching or performance features
- No SEO, schema, or sitemap features
Key Findings
Visual Quality Comparison
Same image: original JPEG vs ProRank WebP. Drag the slider to compare.
Compression Face-Off
File size reduction (%) — higher is better. Tested with 3 Unsplash JPEGs (2400px wide).
JPEG
WebP
AVIF
JPEG XL
Format Support
| Format | ProRank | ShortPixel |
|---|---|---|
| JPEG (JPEGli) | ||
| WebP | ||
| AVIF | ||
| JPEG XL |
How They Work
ProRank
Cloud API (cjpegli + Sharp + cjxl)
- Google cjpegli for JPEG — highest quality per byte
- Sharp for WebP & AVIF — tuned quality offsets
- cjxl for JPEG XL — rare among WordPress plugins
- Smart compression adapts to image dimensions
ShortPixel
Cloud API (credit-based)
ShortPixel uses a cloud API that processes images on their servers. They offer credit-based pricing (each image counts as 1 credit) or an unlimited monthly plan at $9.99/mo. The compression quality is excellent — the closest competitor to ProRank.
Feature Comparison
| Feature | ProRank | ShortPixel |
|---|---|---|
| Image Compression | ||
| JPEGli (Google encoder) | ||
| WebP conversion | ||
| AVIF conversion | ||
| JPEG XL conversion | ||
| Smart compression (auto quality) | ||
| Bulk optimization | ||
| Lossless mode | ||
| Delivery & Performance | ||
| Lazy loading | Paid | |
| CDN delivery | Paid | |
| Page caching | ||
| Critical CSS / UCSS | ||
| Script Manager | ||
| HTML minification | ||
| SEO & Content | ||
| SEO titles & meta | ||
| Schema markup (30+ types) | ||
| XML sitemaps | ||
| Internal linking | ||
| Redirects manager | ||
| Pricing Model | ||
| Credit/quota based | 5K–100K/yr by plan | Per-credit |
| Flat annual fee | From $99/yr | $9.99/mo |
| Free tier | Local optimization only | 100 credits/mo |
Features may vary by plan and version. Last verified February 16, 2026.
Pricing
ProRank Premium
Pro: 5,000 images/yr ($99), Business: 20,000/yr ($199), Agency: 100,000/yr ($399)
- Cloud image optimization (5K–100K/yr by plan)
- Page caching & critical CSS
- Complete SEO toolkit
- Schema markup (30+ types)
ShortPixel
$4.99/mo for 5,000 credits or $9.99/mo unlimited
- Image optimization only
- No caching
- No SEO features
- No schema markup
Methodology
All plugins tested at their maximum lossy/aggressive compression setting. Results represent average savings across 3 images. Each plugin's cloud API was used directly with default aggressive settings. ProRank uses cjpegli for JPEG, Sharp for WebP/AVIF, and cjxl for JXL.
The Bottom Line
ShortPixel is the closest competitor in pure compression quality — within 1.4pp on WebP and essentially tied on JPEG. The difference is what you get beyond images: ProRank includes page caching, critical CSS, script management, and a complete SEO toolkit with 30+ schema types, sitemaps, and redirects. One plugin for $99/year vs ShortPixel alone at $119.88/year.