A great corporate card for startups. Easy to use and set up, easy search and track spending. I would recommend it to tech companies looking for an interface and experience that vastly improves on existing banks. Also great to have a large line of credit compared to what's offered traditionally
Deem has made life simpler while we make our trips around the states to deliver innovative IT systems with clients. It has incredible synchronization so that whenever you are out for an official trip, the management is notified of your absence in good time. I however a big issue with their hotel reservation system. It does not update the reservations availability in real-time and we get the 'reservation not available message' after booking which brings several inconveniences.
Rewards - The rewards were the main reason for us switching. Our previous card provider did not have a good rewards program.
User Interface and experience - When a charge is recorded on the Brex card, users immediately receive a text notification asking them to send a picture of their receipt. Brex automatically attaches the receipts to the charge which has saved our users a significant amount of time.
We use and thoroughly enjoy both. One we use as our main bank and Brex as our credit card provider. I'd say they serve different purposes (with Brex we get points), whereas Mercury we mostly use for wire transfers. We did initially start using Mercury because we needed a checking account, but Brex has been nice because of the rewards and the way it works to track expenses and cards.
Deem seems much more efficient. Concur limited the types of hotels or flights that I was able to view. Perhaps they had some kind of admin settings on there blocking access to everything for me. But Deem was much easier and faster to use in my opinion.