In the beginning
In the beginning, I loved the service. It helped me get items off the ground quickly. After following the guides and publishing the application, it was apparent that security holds were abundant. I made 3 attempts to contact Abacus.ai support (email was the only option I could find). After two weeks and no answers, I figured it was time to move on. I was simply using the $10 a month subscription. Our company was paying good money on average per month.
I can't speak to their enterprise plans, but for SMB's, I would be careful on putting your business processes in their hands - especially, when you can't get support.