Business spending millions a year on CC, had exclusivly Chase Biz cards til now.
Chase shutdown.
What redemption program is most simila to Chase? Amex? Capital One? BOA?
Main criteria is to be able to book straight through the portal, have good availability[not restricted to one hotel/ flight per stay], and good redemtion rates overall so that they won't have to keep comparing hotels/ flights to other sites before booking.
Sugestions?
Amex MR is the most comparable to Chase UR in terms of transfer options and travel portal options. However, based on your post, it seems you don't use the transfer method to use your points, rather, you book through the portal. If that's the case you might want to consider Capital one miles, they're worth one cent as a statement credit towards any paid travel, effectively eliminating the need for portals and allowing you much more flexibility. (I think BOA works the same way but I'm not sure).
If you do decide to go with Amex, make you sure you get the business gold or platinum as they give a 25% and 35% rebate on points used for travel respectively. This effectively gives you a 1.25%/1.35% return per point. However, keep in mind that it's a rebate, which means you need the full amount of points to book your travel and only get back the rebate after the fact.