A 30-second animated demo of the t3send browser add-on: start a T3 thread from an email, link a Slack message to the same thread, settle it in T3 and see both marked done.
Watch it: https://dbiserov.github.io/t3send/
People, companies, links and IDs in the demo are made up. The Inter font is under the SIL Open Font License (inter-OFL.txt).