We're thinking of moving from GetResponse to MailChimp. For starts, we foresee needing 25k contacts.
As far as I know, MailChimp doesn't have a startup discount. They do let you send emails to 2,000 contacts with their free plan, but that wouldn't be enough for your needs.
One discount you can get is that if you enable 2-factor authentication on your MailChimp account, you can get a 10% discount on your bill for 3 months.
Another option you could consider is Customer.io, which offers a year of free email for up to 12,000 people, or 90% off your first year otherwise (which your team would need), via Segment's startup package: https://capiche.com/e/best-startup-deals
Especially for personal to-dos and tasks that you need to accomplish outside of your team, what is your favorite app and tricks for getting the most out of it?
Last week, Slack announced some new features, including a WYSIWYG rich text editor.
Along with the addition of this feature, they changed the Markdown functionality to render formatting in-line.