I realise you may not want to do Active Directory, however it is quite common even in small companies -- and you can even get AD via Azure nowadays. Even lots of Mac-only shops have AD.

Maybe v1.x doesn't need AD, however it's something the dev team should definitely consider for later versions. Beyond that, it's really upto AgileBits about how much of the large-corporate market they want to cater for (companies like Centrify seem to have found a niche there)

Thanks for listening.