What are some alternatives?
When comparing Slackmojis and Emoji Packs, you can also consider the following products
My Slack Emoji - Turn your team photos into Slack emoji's
Emoji Best - A crowdsourced directory of the best custom emojis 💯
Slack Emoji Reactions - Respond to any message with an emoji! 🎉😻🙌
Cult of the Party Parrot - Add dozens of Party Parrot emojis to Slack
Discord Emoji - Iconfinder, but for emoji.
Trump Reactions - Replace new Facebook reactions with Trump 😮