What are some alternatives?
When comparing Raindrop.io and PostDiva, you can also consider the following products
Pocket - When you find something you want to view later, put it in Pocket.
Lasso Content Curation - Become an information ninja. Stop losing the info you need.
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
elink - Create Beautiful Curated Newsletters & Web Pages in Minutes.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
DrumUp - Content Marketing & Social Media Management Software