imho,You hit the nail on the head...
Travel perk is an OTA meaning it has its own inventory and does not rely on your TMC or travel agency (who will always have very limited inventory when compared to all the options you can find online today). According to the product page on their website they claim to be integrated to muktiple GDS and to sites like expedia, booking.com etc.
So you can compare them to amex, egencia and some other business OTAs but concur belongs to another category, its mainly an expense management app.
On top of being an actual OTA, Travelperk (and similar tools) offer a layer of travel management features like baked in company travel policies you can configure, approval rules, invoice management and reporting etc. Concur, as an expense management app will offer more robust options in managing and tagging expenses but incomparable as a travel management tool.
Originally Posted by
Often1
Concur is simply compliance software. It is not a TA, an OTA or anything else. One can set Concur up to permit (or not) pretty much anything that can be booked through a corporate TA. E.g., F, fully-refundable, and so on.
Most people who experience problems with Concur are not experiencing problems with Concur, but rather with their employer's policies or competence or both.
The value to the employer of a system such as Concur is that the travel policy is effectively baked into the software.