If you're looking for something different from Colorize, Remini is a good alternative. It's got a variety of tools to transform low-quality photos and videos into high-resolution images. Remini is good at face processing, color grading, noise reduction and background detail processing that can help with common photo problems like blur, camera shake and focus problems. It's good for social media, preserving history and e-commerce.
Another option is ImageColorizer, a cloud-based service that uses machine learning technology to restore and improve old photos. It's got tools like Colorize, Restore Photos, AI Enhance, AI Retouch and AI Repair. Those tools can colorize black and white photos, upscale faces and details, restore blurry photos and erase scratches and other unwanted elements. It's got a free plan and several paid options, so you can use it in whatever way makes the most sense.
If you're looking for something for free, Restore Photos offers AI-based photo restoration, HD face retouching and colorization. It's designed to be easy to use and accessible, so you can upload photos and get restored images without having to be a tech whiz. It's good for preserving memories by breathing new life into old black and white photos.