The answer to the question is simple. While Chargify and Wave both provide invoicing services, they have very different types of customers. Wave’s customer is sending individual invoices to clients, where the information is manually inputted. Chargify focuses on companies that have a range of subscription products that require the efficiency of automated billing (think a maintenance fee or gym membership). mHelpDesk is focused on in the field invoicing, in which work estimates and approvals need to created and signed off at the customer’s location.
The most popular invoicing software is Freshbooks, which isn’t the cheapest option. However, it enables a company to send very professional looking invoices, bills and estimates with a minimal amount of effort.
Overall, businesses are very happy with their invoicing software, with 7 out the 8 companies receiving ratings over 3 stars.