What are some alternatives?
When comparing Slackmojis and Pictogrify, you can also consider the following products
Emoji Packs - Import emoji packs into your Slack and other chat apps
Avataaars - Mix and match avatars with a Sketch library
My Slack Emoji - Turn your team photos into Slack emoji's
Humaaans - Mix-&-match illustrations of humans with a design library.
Slack Emoji Reactions - Respond to any message with an emoji! 🎉😻🙌
UI Faces - Avatars for design mockups