Ask HN: ACH deposit providers

I currently run a theatrical ticketing business that sends checks to its customers on a weekly business (buyplaytix.com). I've been using batchex.com for sending checks and doing direct deposits into my customer's bank accounts. Batchex is going into indefinite suspension looking for more funding, so I'm a bit up a creek. Does anyone have a direct deposit solution that works for startups? I've looked at webmasterchecks.com, but they appear to want each of my customers to send in a cancelled check and initiate a fairly slow process. Optimally it would be someone that has an API or I could send a csv file with a list of my e-checks and checks.