The best alternatives to Snaggy are Infinit, Relephant, and Screenshotter 2.0. If these 3 options don't work for you, we've listed a few more alternatives below.
Screenshot organization and smart search, for effortless memory retrieval. Categorized screenshots by keywords, topic, and source -- so that you can find the memory you're looking for.
With Jaadoo you can search and manage your mobile screenshots, magically. We are privacy first, so no data ever leaves your phone. Available for iOS and Android.