Template & Client Compatibility about mosaico HOT 1 CLOSED

A) Mosaico is template based, so compatibility depends on the template being used.
B) It is really unfair to think that Mailchimp compatibility is better just because they are big: just look in the internet to see WHO publish reports about email client issues and you won't see Mailchimp, there, but minor developers. E.g. the infamous 1px pixel bug from Outlook have been first reported by ME, even if it appeared for every sender, including Mailchimp ( https://mosaico.io/email-client-tricks/outlook-2016-weird-1px-horizontal-lines/ ). The most compatible technique to date, aka Fab4 ( https://mosaico.io/email-client-tricks/fab4-responsive-beyond-gmail/ ), have been shown by Rémi Parmentier aka HTeuMeuLeu, the author of "caniemail" ( https://www.caniemail.com/ ): no big email marketing service names like Mailchimp behind those stuff, because real innovation/evolution happens elsewhere.
C) I'd bet versafix-1, our master template, to show better compatibility than anything you will find around: of course everyone is good at most common clients, but you should check edge use cases, like gmail webmail from a smartphone (not the gmail app, but the gmail webapp through the mobile browser), or gmail app reading a non gmail email via IMAP (GANGA).

To answer your question:

1. I'd bet mosaico's "versafix-1" is more accurate (more compatible): do your own testing and report issues to the versafix-1 repo, if you find mailchimp is better: the more edge cases (e.g: country specific webmails/app) you'll test the more it will be clear.
2. wrong assumption.
3. this is a matter of what smtp relay service do: they should not break html, but if they do it is an issue in their service: we don't care of them: it is already a PITA to care of most email clients. If your smtp relay service changes your html when sending, simply switch to another service.
4. I don't know what you mean by this question.
5. "reporting features"? Which reporting features? Mosaico is just an email composer.

from mosaico.