@courtz - With respect I don't think you're listening to the feedback you're getting. This has to be the single biggest obstacle your business will face and IMHO its a huge obstacle.
"We store your saas credentials securely" etc isn't going to cut it with a skeptical audience.
After all every one of these websites undoubtedly claimed the same - https://haveibeenpwned.com/PwnedWebsites
We're not talking about some tracking cookies or my facebook profile here, we're talking about bank and SaaS credentials that could cost me real money or even absolutely destroy my business if lost. For those reasons personally I won't even use an online password manager like LastPass.
Now the audience here may not be representative of your target audience - the only way you will know is to validate (and you may already have done some of that before building).
Having said all that - sincere good luck with your project.