I really like that Tiny Chat uses existing infrastructure (from Slack) to send and deliver messages. This way the developers can concentrate on making the widget look and behave nicely, while not being burdened with message delivery and storage. Smart!

The message flow (from widget to Slack, as well as Slack to widget) works well. Using emojis in Slack, conversations can be marked as "completed", which works quite well.

There are still some (tiny) issues, e.g.:

The availability in the widget is not reflecting the online status in Slack. I noticed when I set myself as "away" and in Slack it would show up as available to chat. Since multiple Slack users can send and receive messages in a workspace, the online state is not directly connected to a single user, but I haven't found a way, yet, to accurately reflect my online status in the widget.

GDPR is another topic that needs to be addressed / researched. Users enter their email addresses into the widget. This email address is then sent to the Tiny Chat server (EU based) and from there on to the Slack server (US based, I assume).

There are also some minor styling issues. E.g. some elements in the widget don't have enough margins, or the new message indicator when the widget is closed looks a bit off (not centered). But overall, the widget looks quite good already, and better than most chat widgets that I have seen on AppSumo.

I am sure the developers will find solutions for all of these minor problems, and getting this feedback is probably why they came to AppSumo in the first place.

I am rating it 6/5 tacos, minus one taco because of the things mentioned above, so 5/5 tacos.