We're building a cloud based SaaS application that needs to allow company employees to use their corporate login. At this stage in the company, we haven't recognized a need for any other integration other than being able to import and export a CSV file, however, we plan to offer an iPhone and Android app as well and I'm currently unsure of the authentication / integration needs. At this point, should we start using an integration solution at the beginning or should we custom build the simplest solution as possible and just add as necessary? How prevalent are the integration issues in modern cloud enterprise sales?
I would also explore the stated need to allow company employees to use their corporate login. How critical is this to your solution? Could you launch without the integration? Have customers asked for the integration?
There are plenty of b2b SaaS solutions that don't offer this type of integration for variety of reasons. As a startup, you don't have the luxury to go down this rabbit hole if your solution is not dependent on it. Focus on your core solution and integration can be added later.