Too many founders wing it when it comes to financials and have no idea how to use basic modeling to drive strategy. In this course, we’ll teach you how to build a basic financial model, read financial statements, and understand cash flow, balance sheets, and income statements.
Another alternative is esharesinc.com which I'm about to start using. eShares lets you export your data; I bet captable.io does too. If they ever shut down, I'd imagine they'd give you plenty of notice to rescue it all. Shutting down in the middle of the night and deleting your data would probably not be looked at kindly by the SEC.