Kraken.io
kraken.io
What it is
Kraken.io is an image optimization service with a browser tool and an API. In the browser, it can optimize, compress, resize, and convert images without code; it also accepts ZIP archives and returns a processed archive. Supported formats are JPG, PNG, WebP, GIF, SVG, AVIF, HEIC, and PDF. The service offers batch processing, metadata controls, and both listed compression modes, with a maximum upload size of 32. Each account starts with 100 MB of testing quota, and signup does not require a credit card. Monthly quota is measured by unprocessed source image data before overage charges. Plans include Free, Micro, Basic, Advanced, Premium, and Enterprise; the pricing note lists paid service from $5/mo. Customers can choose monthly or yearly billing and cancel, downgrade, or upgrade without a contract. Official plugins are available for WordPress and Magento.
Spec sheet
- What it does
- Kraken.io is a SaaS service for automated image optimization, compression and resizing while retaining visual quality.Read 15 Oct 2026 · kraken.io
- Free plan
- YesRead 20 Sep 2026 · kraken.io
- Paid from
- 5Read 20 Sep 2026 · kraken.io
- Integrations
- Documented integrations include WordPress, Magento, Gulp, Grunt and third-party clients or plugins for Haskell, Java, Python, Laravel, Symfony, Drupal, Perch, Umbraco, Contao and Sitefinity.Read 15 Oct 2026 · kraken.io
- API access
- YesRead 20 Sep 2026 · kraken.io
- API authentication
- API requests use HTTPS POST with a JSON auth object containing an API key and API secret.Read 15 Oct 2026 · kraken.io
- API credentials
- Each plan permits up to ten sets of API credentials for separate applications or sites.Read 15 Oct 2026 · kraken.io
- Batch processing
- YesRead 20 Sep 2026 · kraken.io
- Billing frequency
- Customers can choose monthly or yearly billing.Read 28 Sep 2026 · kraken.io
- Billing terms
- Terms state subscriptions are billed in advance monthly or yearly and are non-refundable.Read 15 Oct 2026 · kraken.io
- Browser web interface
- The browser tool optimizes, compresses, resizes, and converts images without code.Read 28 Sep 2026 · kraken.io
- Browser workflow
- The web interface accepts drag-and-drop images, ZIP archives and format conversion without coding.Read 15 Oct 2026 · kraken.io
- Changelog
- Plugin version 3.0.3 added 64 locales and a site-savings panel; version 3.0.2 tightened permissions and improved quota and error messaging.Read 15 Oct 2026 · wordpress.org
- Company size and headquarters
- LinkedIn lists Kraken.io as privately held, headquartered in Berlin, with 2–10 employees.Read 15 Oct 2026 · linkedin.com
- Compression modes
- The product provides lossy, lossless and expert optimization modes.Read 15 Oct 2026 · kraken.io
- Current status
- On October 15, 2026 the status page reported all listed systems operational and no incident reported that day.Read 15 Oct 2026 · status.kraken.io
- External storage
- API results can be stored directly in Amazon S3, Rackspace CloudFiles, Microsoft Azure and SoftLayer storage.Read 15 Oct 2026 · kraken.io
- File-size limits
- The free interface allows 1 MB files while PRO plans allow files up to 32 MB.Read 15 Oct 2026 · kraken.io
- Founder
- Crunchbase identifies Karim Salman as CEO and co-founder and lists the company as an active private Berlin, Germany business.Read 15 Oct 2026 · crunchbase.com
- Free account
- Every account starts with 100 MB of testing quota and does not require a credit card.Read 15 Oct 2026 · kraken.io
- Free testing quota
- Every account starts with 100 MB of testing quota.Read 28 Sep 2026 · kraken.io
- GDPR
- Nekkra UG publishes a GDPR Data Processing Addendum effective September 4, 2023.Read 15 Oct 2026 · kraken.io
- Image resizing
- Images can be resized with several strategies before optimization.Read 15 Oct 2026 · kraken.io
- Image resizing
- YesRead 20 Sep 2026 · kraken.io
- Legal maker
- The legal provider is Nekkra UG (haftungsbeschränkt), registered in Berlin and represented by managing director Karim Salman.Read 15 Oct 2026 · kraken.io
- Licence
- WordPress.org identifies the Kraken.io Image Optimizer plugin as open-source software, but the hosted Kraken.io service is presented as a SaaS product rather than open-source software.Read 15 Oct 2026 · wordpress.org
- Limit: billing and support complaints
- Recent Trustpilot reviewers alleged unexpected overage charges, plan switching or charging problems, malfunctioning tests and unanswered support messages.Read 15 Oct 2026 · trustpilot.com
- Limit: free tier and pricing
- G2 reviewers described the free version as feature-limited, considered pricing high, and wished unused monthly quota rolled over.Read 15 Oct 2026 · g2.com
- Limit: web interface
- A G2 reviewer said the web interface could become buggy and require a refresh, while another wished for a native Mac drag-and-drop app.Read 15 Oct 2026 · g2.com
- Limit: WordPress support
- WordPress reviewers reported unanswered support requests, plugin breakage, failed bulk actions and difficulty cancelling subscriptions.Read 15 Oct 2026 · wordpress.org
- Max upload size
- 32Read 20 Sep 2026 · kraken.io
- Metadata controls
- YesRead 20 Sep 2026 · kraken.io
- Official SDKs
- Official libraries are listed for PHP, Node.js, Ruby, Go, .NET C#, Java, Python and PowerShell.Read 15 Oct 2026 · kraken.io
- Plan changes
- Accounts can be canceled, downgraded, or upgraded at any time without a contract.Read 28 Sep 2026 · kraken.io
- Platform plugins
- Official plugins are available for WordPress and Magento.Read 28 Sep 2026 · kraken.io
- Praise: ease and results
- G2 reviewers repeatedly praised the intuitive interface, fast bulk optimization and compression with little or no visible quality loss.Read 15 Oct 2026 · g2.com
- Privacy handling
- The privacy policy says collected information is not sold or shared for commercial purposes and that payment-card data is transmitted using SSL and not stored on Kraken.io servers.Read 15 Oct 2026 · kraken.io
- Quota definition
- Monthly quota measures unprocessed source image data before overage charges.Read 28 Sep 2026 · kraken.io
- Rating on G2
- 4.2 out of 5 from 26 reviewsRead 15 Oct 2026 · g2.com
- Rating on Trustpilot
- 1.6 out of 5 from 24 reviewsRead 15 Oct 2026 · trustpilot.com
- Rating on WordPress.org
- 4.5 out of 5 from 119 reviewsRead 15 Oct 2026 · wordpress.org
- Shared quota
- Monthly image quota is shared across the API, web interface, WordPress plugin and Magento extension, with overage billed per GB.Read 15 Oct 2026 · kraken.io
- Signup card requirement
- No credit card is required to sign up.Read 28 Sep 2026 · kraken.io
- Supported formats
- The service supports JPG, PNG, WebP, animated WebP, GIF, animated GIF, SVG, AVIF, HEIC and PDF.Read 15 Oct 2026 · kraken.io
- System requirements
- The WordPress plugin version 3.0.3 requires WordPress 4.9 or newer and PHP 5.6 or newer, and is tested through WordPress 7.0.7.Read 15 Oct 2026 · wordpress.org
- Webhooks
- The API can send HTTP POST callbacks when optimization jobs complete.Read 15 Oct 2026 · kraken.io
- WordPress plugin
- The plugin automatically optimizes uploads and thumbnails, supports bulk processing, WebP and AVIF conversion, PDF compression, resizing and selected EXIF preservation.Read 15 Oct 2026 · wordpress.org
- ZIP batch processing
- The web interface accepts ZIP archives with multiple images and returns a processed archive.Read 28 Sep 2026 · kraken.io
- ZIP processing
- The ZIP uploader extracts images, optimizes them and returns a processed archive while preserving folder structure.Read 15 Oct 2026 · kraken.io
Plans and prices
Free Free 100 MB testing quota 100 MB of testing quota; no credit card required Read 28 Sep 2026 · kraken.io
Micro $50 a year $50 / yr. 500 MB images per month · $5 per additional GB 500 MB of images per month; $5 per additional GB Read 15 Oct 2026 · kraken.io
Basic $90 a year $90 / yr. 2 GB images per month · $4 per additional GB 2 GB of images per month; $4 per additional GB Read 15 Oct 2026 · kraken.io
Advanced $190 a year $190 / yr. 5 GB images per month · $3 per additional GB 5 GB of images per month; $3 per additional GB Read 15 Oct 2026 · kraken.io
Premium $390 a year $390 / yr. 15 GB images per month · $2 per additional GB 15 GB of images per month; $2 per additional GB Read 15 Oct 2026 · kraken.io
Free Account Free 100 MB testing quota · no credit card Read 15 Oct 2026 · kraken.io
Micro $5 a month $5 / mo. 500 MB images per month · $5 per additional GB Read 15 Oct 2026 · kraken.io
Basic $9 a month $9 / mo. 2 GB images per month · $4 per additional GB Read 15 Oct 2026 · kraken.io
Advanced $19 a month $19 / mo. 5 GB images per month · $3 per additional GB Read 15 Oct 2026 · kraken.io
Premium $39 a month $39 / mo. 15 GB images per month · $2 per additional GB Read 15 Oct 2026 · kraken.io
Enterprise $79 a month $79 / mo. 60 GB images per month · $1 per additional GB Read 15 Oct 2026 · kraken.io
Enterprise $790 a year billed monthly 60 GB images per month · $1 per additional GB 60 GB of images per month; $1 per additional GB Read 28 Sep 2026 · kraken.io
Strong points and limits
Strong points
- Browser tools work without code.
- Accepts ZIP archives for batch processing.
- Supports JPG, PNG, WebP, GIF, SVG, AVIF, HEIC, and PDF.
- No credit card required for signup.
- Official WordPress and Magento plugins are available.
Limits
- Maximum upload size is 32.
- Monthly quota is based on unprocessed source image data.
- Overage charges apply beyond plan quota.
Who it suits
Kraken.io suits people who need browser-based image processing, API access, or ZIP batch processing. Its free testing quota and plugins may also suit users of WordPress or Magento.
Verdict
Kraken.io combines browser image processing with API access and multiple plan options. Check the upload-size limit and quota basis against your workload before choosing a plan.
Where Specifiction places it
- Image Compression Software#1 of 859.4
