American Express (Amex) is one of the main two programs points enthusiasts collect along with Chase Ultimate Rewards.
Amex offers generally more complicated products (both for bonus earning categories and redemptions) but when done right can be one of the most lucrative credit card programs. We recommend opening your first points credit card with a simpler program.
Amex has a very strong set of transfer partners though many are more complicated to work with. Causal points users can easily get a lot of value from Air Canada, British Airways, and Singapore Airlines. More advanced points users will appreciate programs like Avianca, ANA, and Etihad.
It’s generally very poor value to transfer to these partners.
My referral code might get you a better offer than what’s publicly available:
Blue Business Plus
Marriott Bonvoy Business