Per-seat made sense when software was a desktop license. For live chat it just means you think twice before letting a teammate help a customer. That is backwards.
What flat pricing changes
Add the intern. Add the founder. Add the part-time freelancer who covers weekends. The bill does not move. You stop optimizing your team around a pricing page.
How muro segments instead
We charge by how many projects you run, not how many people help, because adding a site costs us almost nothing. Solo for a product or two, Fleet for a whole portfolio, unlimited agents on both. See pricing.