The best alternatives to Unhoard are Refind, P2K: Pocket to Kindle, and PocketRocket. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Unhoard?
AssemblyAI— Speech-to-Text API with superhuman accuracy
Pocket 2 Kindle is a service that sends your Pocket list to your Kindle. You can customize P2K to deliver your newest and oldest items, or try a random assortment of saved items for fun.