If you're a small business you'll likely get billed by several vendors on a regular basis. Some don't send PDF invoices and it's a major pita logging in and downloading those invoices on a regular basis. This is where Vuala comes into the picture. Vuala makes it super easy by handling everything automatically. I have it set up to connect to all my SaaS subs, grab the invoices, and then forward them multiple email addresses I defined.

Pros:
Solid Funding: These guys have nearly €500k in funding, so they're not going anywhere.
Great Compatibility: They support SparkReceipt (another Appsumo gem!) and tons of other cloud/accounting apps like Xero, QuickBooks, Google Cloud Storage and of course email.
Custom Email: You get a unique Vuala email address to forward bills and PDFs, which then get processed according to your rules.

Cons:
Security Concerns: When you connect to a service, it launches a browser virtual machine (VM) to capture login information. It's encrypted, but I’d personally avoid using it with super sensitive credentials.

Bottom Line:
Do you value time? If so, this is a NO-BRAINER buy!