ImageOptim API might be a bit more popular than Optimage. We know about 1 link to it since March 2021 and only 1 link to Optimage. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
I personally swear by Optimage. Although its primary function is images, it also does video. It is fast and it has a very generous free offering (24 files per day). It doesn't have many options, but to me, that's a feature, not a bug. - Source: Reddit / about 1 month ago
ImageOptim - Faster web pages and apps.
Pichi - Compress, optimize and resize your images. Fast.
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Squash 2 for Mac - The easiest way to compress and optimize images for the web
pngquant - command-line utility and library for lossy compression of PNG images
Crunch Image Optimization - Crunch is an OS X tool for PNG image file optimization.