Concur vs Invoice Ninja: What are the differences?

What is Concur? Your go-to source for all things Travel and Expense. Employees can book domestic and international flights, reserve rental cars and make hotel and rail reservations - all from their smartphones or desktop browser. Thanks to the integration of travel with expense reporting, all itineraries and credit card charges are automatically imported.

What is Invoice Ninja? Open-source platform to invoice, track payments, expenses, and time billable tasks for clients. It is an open-source platform to invoice, track payments, expenses, and time billable tasks for clients Less time working, more time living. Create. Send. Get Paid..

Concur and Invoice Ninja are primarily classified as "Expense Management" and "Payments" tools respectively.

Some of the features offered by Concur are:

• Concur Expense- Submit, view or approve expenses via your mobile device. And, you can instantly see claims that are out of policy and provide real-time policy feedback. Also, Concur works globally, so currency exchange rates and VAT calculation are covered, too.
• Concur Travel.- Book within your corporate travel policy from anywhere at any time. It keeps track of your reward numbers, seat preferences, and gate information. You can also upload electronic folios, directly to expense reports.
• ​Concur For Mobile.- Capture receipts with your smartphone, upload IRS compliant images directly to expense reports, approve or reject expense reports via manager access, book flights, rail, or hotels from your smartphone. Create a single itinerary from any travel reservation and any travel vendor with TripIt Pro. Add car mileage to an expense report.

On the other hand, Invoice Ninja provides the following key features:

• Invoicing & Payments
• Expenses & Vendors
• Proposals Creation

Invoice Ninja is an open source tool with 5.23K GitHub stars and 1.63K GitHub forks. Here's a link to Invoice Ninja's open source repository on GitHub.