What are some alternatives?
When comparing Reaction Story and Slack Emoji Reactions, you can also consider the following products
Trump Reactions - Replace new Facebook reactions with Trump 😮
Slackmojis - A directory of the best custom slack emojis
Facebook Reactions - A more expressive Like button
Reaction Packs for Facebook - Swap out Facebook reactions for something a little more fun.
My Slack Emoji - Turn your team photos into Slack emoji's
Sprinkles by Microsoft - A smart camera with fun ideas 🍩