Particify might be a bit more popular than Piio. We know about 1 link to it since March 2021 and only 1 link to Piio. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Piio.co — Responsive image optimization and delivery for every website. Free plan for developers and personal websites. Includes free CDN, WebP and Lazy Loading out of the box. - Source: dev.to / almost 3 years ago
There is the german project particify. But that is rather ment for feedback and questions while a lecture is going on. It is used by quite a number of universities in Germany and Austria. Unfortunately at the moment it is all in german. But possibly they are working on an englisch version. Should' nt be too hard. It's Open Source, you could customize it. Https://particify.de/. Source: over 1 year ago
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