Comparison24 min read

Image CDN Comparison: Cloudinary, Imgix, Sirv and More

Compare leading image CDN services. Features, pricing, performance, and use cases for Cloudinary, Imgix, Sirv, Bunny, Cloudflare, and more.

By ImageGuide Team·Published January 19, 2026·Updated January 19, 2026
cdncloudinaryimgixsirvimage optimizationcomparison

Image CDNs transform, optimize, and deliver images globally. This guide compares the leading services to help you choose the right one for your needs.

What Image CDNs Do

Unlike traditional CDNs that only cache and deliver, image CDNs provide:

  • Real-time transformation: Resize, crop, filter on-the-fly
  • Format conversion: Automatic WebP/AVIF delivery
  • Quality optimization: Smart compression
  • Global delivery: Edge caching worldwide
  • Responsive images: Generate srcset variants
  • Storage: Host your images (most services)

Quick Comparison

Service Best For Starting Price AVIF AI Features
Cloudinary Full-featured apps $0 (free tier) Yes Yes
Imgix Performance-critical $25/mo Yes Yes
Sirv E-commerce, 360 spin $0 (free tier) Yes Yes (via AI Studio)
Bunny Optimizer Budget-conscious $9.50/mo Yes Limited
Cloudflare Images Cloudflare users $5/mo Yes No
ImageKit Developers $0 (free tier) Yes Yes
KeyCDN Simple needs Pay-as-you-go No No

Cloudinary

Overview

The most feature-rich image CDN with extensive transformation options and AI capabilities.

Features

Feature Support
On-the-fly transforms 200+ transformations
Format conversion WebP, AVIF, auto
AI features Face detection, auto-crop, background removal
Video processing Full support
Storage Included
DAM features Full digital asset management

Pricing

Plan Price Monthly credits Users / accounts
Free $0 25 credits/mo 3 users / 1 account
Plus $99/mo ($89/mo annual) 225 credits/mo 3 users / 2 accounts
Advanced $249/mo ($224/mo annual) 600 credits/mo 5 users / 3 accounts
Enterprise Custom Custom Custom

Cloudinary bills in credits, not separate transformation and storage buckets — one credit covers a mix of transformations, storage and bandwidth, so real cost depends on your usage mix. Credit burn is the most common source of bill surprises at scale.

URL Structure

https://res.cloudinary.com/demo/image/upload/
  w_800,           # Width 800px
  h_600,           # Height 600px
  c_fill,          # Crop mode
  g_face,          # Focus on face
  q_auto,          # Auto quality
  f_auto           # Auto format (WebP/AVIF)
  /sample.jpg

Code Example

// Cloudinary URL builder
function cloudinaryUrl(publicId, transforms = {}) {
  const {
    width,
    height,
    crop = 'fill',
    quality = 'auto',
    format = 'auto',
    gravity = 'auto'
  } = transforms;

  const parts = [];
  if (width) parts.push(`w_${width}`);
  if (height) parts.push(`h_${height}`);
  parts.push(`c_${crop}`);
  parts.push(`g_${gravity}`);
  parts.push(`q_${quality}`);
  parts.push(`f_${format}`);

  const transformString = parts.join(',');

  return `https://res.cloudinary.com/${CLOUD_NAME}/image/upload/${transformString}/${publicId}`;
}

// Usage
const heroImage = cloudinaryUrl('hero.jpg', {
  width: 1920,
  height: 800,
  crop: 'fill',
  gravity: 'auto'
});

Best For

  • Media-heavy applications
  • User-generated content
  • AI-powered cropping/transformations
  • Teams needing DAM features
  • Video + image in one platform

Limitations

  • Complex pricing at scale
  • Learning curve for advanced features
  • Can be expensive for high-traffic sites

Imgix

Overview

Performance-focused image CDN with powerful real-time processing and excellent documentation.

Features

Feature Support
Transformations 100+ parameters
Format conversion WebP, AVIF, auto
AI features Face detection, auto-crop
Video processing Limited (imgix-video)
Storage Bring your own (S3, GCS, etc.)
Purging Instant

Pricing

Plan Price Monthly credits Storage / delivery ceiling
Starter $25/mo 100 50GB / 100GB
Basic $75/mo 375 187.5GB / 375GB
Midrange $150/mo 830 415GB / 830GB
Growth $300/mo 1,875 937.5GB / 1,875GB
Growth Plus $500/mo 3,570 1,785GB / 3,570GB
Enterprise Custom Custom Custom

Imgix also moved to a credit model: storage costs 2 credits/GB/month, delivery 1 credit/GB, and transformations vary by feature. All plans include full access to every transformation feature. Annual prepay saves roughly 15-17%.

URL Structure

https://your-source.imgix.net/photo.jpg?
  w=800&           # Width
  h=600&           # Height
  fit=crop&        # Fit mode
  crop=faces&      # Crop to faces
  auto=format,compress  # Auto format/quality

Code Example

import ImgixClient from '@imgix/js-core';

const client = new ImgixClient({
  domain: 'your-source.imgix.net',
  secureURLToken: 'your-token' // Optional
});

const url = client.buildURL('/photo.jpg', {
  w: 800,
  h: 600,
  fit: 'crop',
  auto: 'format,compress'
});

// React component
import Imgix from 'react-imgix';

<Imgix
  src="https://your-source.imgix.net/photo.jpg"
  sizes="(min-width: 768px) 50vw, 100vw"
  imgixParams={{
    auto: 'format,compress',
    fit: 'crop'
  }}
/>

Best For

  • Performance-critical applications
  • Existing storage (S3, GCS)
  • Developer-focused teams
  • High-traffic sites needing predictable pricing
  • React/JavaScript applications

Limitations

  • No built-in storage — you supply and pay for an origin (S3, GCS)
  • No free tier; entry plan is $25/mo
  • Credit-based billing makes cost harder to predict than a flat capacity plan
  • No video processing in core product

Sirv

Overview

E-commerce focused image CDN with unique 360-degree spin support, excellent media management, and powerful AI features through Sirv AI Studio.

Features

Feature Support
Transformations Extensive
Format conversion WebP, AVIF, auto
360 spin Full support (unique feature)
Zoom Deep zoom, magnifier
Storage Included
Media viewer Built-in gallery/zoom
AI Studio Background removal, generative fill, object removal, upscaling, video generation, virtual try-on
Video processing Full support (streaming, adaptive bitrate)

Pricing

Plan Price Storage Data transfer
Free $0 500MB 2GB/mo
Business $19-849/mo 5GB-500GB 20GB-2,000GB/mo
Enterprise From $999/mo From 300GB Custom

Business is a single plan with a storage slider rather than a ladder of feature-gated tiers. Pick your storage and the price and transfer allowance follow — data transfer is always 4x your storage:

Storage Monthly Annual (per mo) Data transfer
5GB $19 $17.42 20GB/mo
12GB $39 $35.75 48GB/mo
20GB $59 $54.07 80GB/mo
40GB $89 $81.57 160GB/mo
60GB $119 $109.07 240GB/mo
100GB $199 $182.41 400GB/mo
200GB $359 $329.07 800GB/mo
350GB $599 $549.08 1,400GB/mo
500GB $849 $778.25 2,000GB/mo

Annual billing works out to 11 months’ price for 12 months of service across every tier — effectively one month free.

The structural point: every tier is the same product. Dynamic imaging, 360 spin, zoom, CDN delivery and unlimited transformations are on every plan including Free. Paid tiers add custom domains, no Sirv branding, the image editor, spin/video conversion and Digimarc watermarking — then stop changing. You are buying capacity, not unlocking features, so moving up the ladder never means paying for a feature bundle you didn’t want. Enterprise (from $999/mo, 300GB+) adds off-site replication, automatic failover, folder access control, onboarding and a 99.999% uptime SLA.

Figures read directly off the Sirv pricing page slider in July 2026.

URL Structure

https://your-account.sirv.com/image.jpg?
  w=800&           # Width
  h=600&           # Height
  q=80&            # Quality
  format=optimal&  # Auto format
  crop.type=face   # Smart crop

Code Example

// Sirv URL builder
function sirvUrl(path, params = {}) {
  const url = new URL(`https://your-account.sirv.com${path}`);

  const defaults = {
    format: 'optimal',
    q: 80
  };

  const merged = { ...defaults, ...params };

  Object.entries(merged).forEach(([key, value]) => {
    url.searchParams.set(key, value);
  });

  return url.toString();
}

// Product image with zoom
const productUrl = sirvUrl('/products/shoe.jpg', {
  w: 800,
  h: 800,
  'crop.type': 'pad',
  'canvas.color': 'ffffff'
});

// Sirv 360 spin viewer
// HTML: <div class="Sirv" data-src="https://demo.sirv.com/spin/shoe.spin"></div>
// JS:   <script src="https://scripts.sirv.com/sirvjs/v3/sirv.js"></script>

Sirv AI Studio

Sirv AI Studio provides powerful AI-powered editing capabilities:

  • Background removal: Automatically remove backgrounds from product photos
  • Generative fill: AI-powered content-aware fill to extend or modify images
  • Object removal: Remove unwanted objects from images seamlessly
  • Image upscaling: Enhance resolution using AI upscaling
  • Smart cropping: AI-powered subject detection and cropping
  • Video generation: Create videos from images or text prompts
  • Virtual try-on: AI-powered product try-on for fashion and accessories

The Sirv Studio API enables programmatic access to these AI features, perfect for batch processing and automation.

// Sirv AI Studio API example
async function removeBackground(imageUrl) {
  const response = await fetch('https://www.sirv.studio/api/zapier/generate', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${SIRV_STUDIO_API_KEY}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      model: 'remove-bg',
      image_url: imageUrl
    })
  });

  const result = await response.json();
  return result.image_url;
}

Best For

  • E-commerce product images
  • 360-degree product spins
  • Deep zoom requirements
  • Shopify/WooCommerce stores
  • Built-in viewer needs
  • AI-powered image editing (background removal, upscaling)

Limitations

  • Smaller ecosystem than Cloudinary
  • 24 PoPs — a smaller edge network than Cloudflare or Bunny
  • No JPEG XL support (Imgix is the only provider here that has it)

Bunny Optimizer

Overview

Budget-friendly image optimization from Bunny.net, integrated with their CDN.

Features

Feature Support
Transformations Basic (resize, crop, filter)
Format conversion WebP, AVIF
AI features Basic smart crop
Video processing Via Bunny Stream
Storage Bunny Storage
Price Very competitive

Pricing

Component Price
Optimizer $9.50/mo per website (zone)
CDN bandwidth From $0.002/GB
Storage From $0.01/GB/mo

Pay-as-you-go model, very cost-effective

URL Structure

https://your-zone.b-cdn.net/image.jpg?
  width=800&
  height=600&
  quality=80&
  format=auto

Best For

  • Budget-conscious projects
  • Simple transformation needs
  • Existing Bunny.net users
  • High-bandwidth sites
  • Cost-predictable scaling

Limitations

  • Fewer transformation options
  • Basic AI features
  • Less mature than competitors

Cloudflare Images

Overview

Simple, affordable image service integrated with Cloudflare’s network.

Features

Feature Support
Variants Pre-defined transforms
Format conversion WebP, AVIF (auto)
AI features None
Video processing Cloudflare Stream
Storage Included
Delivery Cloudflare edge

Pricing

Metric Price
Images stored $5 / 100,000 images / mo
Images delivered $1 / 100,000 images / mo
Unique transformations First 5,000/mo free, then $0.50 / 1,000

No base subscription — you pay per metric. Cheap at low volume, but note the three meters bill independently, so delivery-heavy sites can outrun the headline $5.

URL Structure

https://imagedelivery.net/{account_hash}/{image_id}/{variant_name}

# Define variants in dashboard:
# - thumbnail: 150x150, fit=scale-down
# - hero: 1920x1080, fit=cover
# - public: original dimensions

Code Example

// Cloudflare Images uses pre-defined variants
const variants = {
  thumbnail: 'thumbnail',
  card: 'card',
  hero: 'hero',
  full: 'public'
};

function cfImageUrl(imageId, variant = 'public') {
  return `https://imagedelivery.net/${ACCOUNT_HASH}/${imageId}/${variants[variant]}`;
}

// Upload via API
async function uploadToCF(file) {
  const formData = new FormData();
  formData.append('file', file);

  const response = await fetch(
    `https://api.cloudflare.com/client/v4/accounts/${ACCOUNT_ID}/images/v1`,
    {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${API_TOKEN}`
      },
      body: formData
    }
  );

  return response.json();
}

Best For

  • Cloudflare users
  • Simple requirements
  • Predictable pricing
  • Sites with defined image sizes
  • Integration with Cloudflare stack

Limitations

  • Pre-defined variants only
  • No real-time transformations
  • Limited flexibility
  • No AI features

ImageKit

Overview

Developer-friendly image CDN with good free tier and modern features.

Features

Feature Support
Transformations Extensive
Format conversion WebP, AVIF, auto
AI features Auto-crop, background removal
Video processing Basic support
Storage Included
URL-based transforms Yes

Pricing

Plan Price Bandwidth Storage
Free $0 20GB/mo 3GB
Lite $9/mo + PAYG 40GB/mo 10GB
Pro $89/mo + PAYG 225GB/mo 225GB
Enterprise Custom Custom Custom

Lite and Pro are pay-as-you-go above the included allowance ($0.45-0.50/GB bandwidth, $0.09-0.10/GB storage).

URL Structure

https://ik.imagekit.io/your_id/image.jpg?
  tr=w-800,h-600,c-at_max,q-80,f-auto

# Or path-based:
https://ik.imagekit.io/your_id/tr:w-800,h-600/image.jpg

Best For

  • Developers wanting free tier
  • Modern API design
  • React/Vue integrations
  • Growing startups
  • Mixed media needs

Limitations

  • Smaller than Cloudinary/Imgix
  • Less enterprise focus
  • Newer platform

Feature Comparison

Transformation Capabilities

Feature Cloudinary Imgix Sirv Bunny CF Images ImageKit
Resize Yes Yes Yes Yes Variant Yes
Crop Yes Yes Yes Yes Variant Yes
Face detection Yes Yes Yes Basic No Yes
Background removal Yes Yes Yes (AI Studio) No No Yes
Watermark Yes Yes Yes Yes No Yes
Text overlay Yes Yes Yes No No Yes
Filters/effects 50+ 30+ 20+ 10+ No 20+
Chained transforms Yes Yes Yes Limited No Yes
AI upscaling Yes No Yes (AI Studio) No No No
Generative fill Yes No Yes (AI Studio) No No No
Video generation Yes No Yes (AI Studio) No No No
Virtual try-on No No Yes (AI Studio) No No No

Format Support

Format Cloudinary Imgix Sirv Bunny CF Images ImageKit
WebP Yes Yes Yes Yes Yes Yes
AVIF Yes Yes Yes Yes Yes Yes
JPEG XL No Yes No No No No
Auto-format Yes Yes Yes Yes Yes Yes
Animated WebP Yes Yes Yes Yes Yes Yes

Performance

Metric Cloudinary Imgix Sirv Bunny CF Images ImageKit
Edge locations 70+ 50+ 24 100+ 300+ 40+
First byte (avg) ~50ms ~40ms ~25ms (cached) ~30ms ~20ms ~50ms
Cache hit ratio High High High (80-90% typical) Very High Very High High

Figures are approximate and vendor-published; methodology differs between providers, so treat them as directional rather than a benchmark. Sirv’s numbers come from its own CDN documentation: 25ms for a cached 25KB file, 55ms on a CDN miss with a processing hit, 160ms for a cold generated variant. Note that PoP count alone is a weak proxy for real-world latency — a smaller network with well-placed PoPs and a high cache-hit ratio often beats a larger one, though very wide networks like Cloudflare’s do help in underserved regions.

Pricing Comparison

Prices below were checked against each vendor’s published pricing page in July 2026. Verify before committing — image CDN pricing changes often, and several vendors have migrated to credit models in the last two years.

How each provider bills

Service Billing model Predictability
Sirv Flat plan by storage tier, transfer bundled at 4x storage High — you pick a tier and the bill is the tier
Bunny Flat per-zone fee + pay-as-you-go bandwidth High
ImageKit Flat plan + pay-as-you-go overage Medium
Cloudflare Images Three independent per-unit meters Medium — cheap until delivery volume climbs
Cloudinary Credits (transformations + storage + bandwidth pooled) Low — usage mix drives cost
Imgix Credits (2/GB storage, 1/GB delivery, variable transforms) Low

This is the axis that usually matters more than headline price. Credit models are flexible but make forecasting hard; flat capacity plans like Sirv’s and Bunny’s cost more at the low end of a tier and less when you’re near its ceiling, but you always know the number.

The scenarios below assume a ~50KB average delivered image, which is a realistic optimized size for a product photo. Your own average is the number that matters — halve it and the bandwidth-metered providers roughly halve too.

Low Traffic (1M requests/month)

Roughly 50GB of delivery per month.

Service Estimated Cost
ImageKit Free $0 (20GB/mo — needs the $9 Lite plan past that)
Cloudinary Free $0 (25 credits)
Cloudflare Images $5/mo + delivery
Bunny Optimizer $15-20/mo
Imgix Starter $25/mo (bring your own origin)
Sirv Business 12GB $39/mo (48GB/mo transfer, storage included)

Sirv’s Free plan (500MB / 2GB) covers a prototype but not 1M requests; the 12GB tier is the realistic entry here.

Medium Traffic (10M requests/month)

Roughly 500GB of delivery per month.

Service Estimated Cost
Bunny Optimizer $30-50/mo
Cloudflare Images $5/mo + ~$100 delivery
ImageKit Pro $89/mo (225GB included, then $0.45/GB)
Cloudinary Plus $99/mo, credits permitting
Sirv Business 200GB $359/mo (800GB/mo transfer, storage included)
Imgix Growth $300/mo

At this scale Sirv is priced for the bundle rather than the byte — you get 200GB of storage and the media viewer stack in that number, where Imgix’s $300 still assumes you’re paying separately for an S3 origin. If you only need delivery and already have storage, Bunny is much cheaper.

High Traffic (100M+ requests/month)

Service Approach
Bunny Optimizer Pay-as-you-go, very competitive
Cloudinary Enterprise pricing, contact sales
Imgix Enterprise, predictable at scale
Sirv Enterprise from $999/mo, configurable allowances + 99.999% SLA
Cloudflare Contact sales

Decision Framework

Choose Cloudinary If:

  • You need extensive transformations
  • AI features are important (face detection, auto-crop)
  • You want DAM (Digital Asset Management)
  • You process video alongside images
  • Budget allows for premium features

Choose Imgix If:

  • Performance is top priority
  • You have existing storage (S3, GCS)
  • You want predictable pricing at scale
  • Developer experience matters
  • You need JPEG XL support

Choose Sirv If:

  • E-commerce is your focus
  • You need 360-degree spins
  • Deep zoom is required
  • Shopify/WooCommerce integration needed
  • Built-in viewer is valuable
  • You need AI features like background removal, upscaling, or virtual try-on (Sirv AI Studio)
  • You need video streaming with adaptive bitrate
  • You want storage bundled in rather than bringing your own S3 bucket
  • You want every transformation feature available from the free tier up, with cost scaling on capacity rather than feature unlocks

Choose Bunny If:

  • Budget is primary concern
  • Basic transformations suffice
  • High bandwidth needs
  • Already using Bunny.net
  • Simplicity over features

Choose Cloudflare Images If:

  • You’re already on Cloudflare
  • Image sizes are predictable
  • Simple variant system works
  • Want integration with Cloudflare
  • Looking for simplest solution

Choose ImageKit If:

  • You want a capable free tier
  • Modern API matters
  • React/Vue integration needed
  • Growing without immediate budget
  • Balance of features and price

Migration Considerations

From One CDN to Another

// URL rewriting approach
const cdnMigration = {
  from: 'https://res.cloudinary.com/demo/image/upload/',
  to: 'https://your-site.imgix.net/'
};

function migrateUrl(oldUrl) {
  // Extract path and transform params
  // Rebuild for new CDN format
  // Test thoroughly before switching
}

Key Migration Steps

  1. Audit current usage: List all transformation types
  2. Map transformations: Ensure new CDN supports all needs
  3. Test thoroughly: Compare output quality
  4. Gradual rollout: Use feature flags or percentage rollout
  5. Monitor performance: Compare loading times
  6. Update integrations: Framework plugins, SDKs

Summary

Quick Decision Matrix

Priority Recommended
Maximum features Cloudinary
Best performance Imgix or Bunny
E-commerce focus Sirv
AI image editing Cloudinary or Sirv (AI Studio)
Lowest cost Bunny or Cloudflare
Best free tier ImageKit or Cloudinary
Simplest setup Cloudflare Images

Cost-Effectiveness by Scale

Scale Most Cost-Effective
Startup (low traffic) Free tiers (ImageKit, Cloudinary, Sirv)
Growing (medium traffic) Bunny on price alone; Sirv if you’re also paying for storage, a viewer or 360 spin elsewhere
Enterprise (high traffic) Bunny or Imgix Enterprise

Bunny wins most straight price comparisons because it sells bytes and little else. The fair way to read Sirv’s number is bundled cost: storage, transformations, the media viewer, zoom and spin are inside one bill, so compare it against Bunny plus your origin plus whatever viewer you’d otherwise license.

Feature Priorities

Need Best Options
AI/ML features Cloudinary, Sirv (AI Studio)
Video + Images Cloudinary, Sirv
360 product spins Sirv (only provider here with a native spin viewer)
Storage included Sirv, Cloudinary, ImageKit
Background removal Cloudinary, Sirv (AI Studio)
Virtual try-on Sirv (AI Studio)
Deep Cloudflare integration Cloudflare Images
Developer experience Imgix, ImageKit
Budget optimization Bunny, Cloudflare

The right image CDN depends on your specific needs, budget, and scale. Start with free tiers when possible, and upgrade as your requirements become clearer.

Related Resources

Related Guides

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Image CDN for Image Hosting

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The Complete Responsive Images Guide

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Image Optimization for Core Web Vitals

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E-commerce Product Image Optimization

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