Thanks for the question! We didn't really focus on the enterprise market yet. So far our customers are individual users looking for a time blocking solution that goes beyond calendar features. The main target is busy professionals like managers and founders, the response has been very good and we really feel like we've been scraping the surface of the market.
Regarding the CAC, so far the vast majority of our growth was organic we invested very little in paid advertising.
Super obvious you aren't focusing on Enterprise by the radio silence on asks for Teams or Microsoft TODO integration.
Since pandemic there are a ton of real companies making actual money and willing to pay for things (!!!) who are using M365. Something like 85% of companies, in fact.
I so often see products starting with e.g. Google Docs integration or dev tools integration, and feel as though, okay, you're scratching your particular itch, but please won't you pop up from SV/HN/dev bubble and let companies with money all across middle business America give it to you?
Start by adding "Sign in with Microsoft" and support the Work/School accounts not just personal. Boom, you just expanded your reach by becoming frictionless to the 85% of the market you were not previously catering to.
Also consider answering the Teams integration and Microsoft TODO object integration threads. They're sorted in your planned columns, with not a peep in over a year.
PS. Don't forget Sign In with Apple. If there is a group as apt to toss money at you for productivity as people with Gmail, it's people with iPhones and Macs.
PS. Yes, that example has SSO, and no, it's not that hard to add support for now that Google and Azure both have wizards, not just startups using Okta. In fact, if you get rid of the little email icon, tada, you no longer have to store people's passwords at all, and can say important-sounding things about taking people's security seriously.
PPS. Great product idea, and slick implementation so far. Countless people I know want this. They'll need you to support their IdP though.
O365 was the first thing I was looking for. The university I work for is heavily invested in O365 calendaring and Tasks, but for myself personally I use a combination of other services. If this could bring them all together for my wife and I to have a single pane of glass I'd be in.
Regarding the CAC, so far the vast majority of our growth was organic we invested very little in paid advertising.