Best worldwide ride hailing service
Uber is in by far the most number of cities worldwide than any other ride hailing app. They do charge in the local currency, so make sure the payment option you provide has no foreign transaction fees (go to our Travel Credit Card or Travel Debit Card sections). Depending on the city, they'll have a few different options that range from carpooling (cheapest) to black car or SUVs (expensive).
Best for rides in China
Didi Chuxing is the biggest ride hailing service in China (after it merged with Uber China). It used to only be available in Chinese but recently became much easier to use for foreigners: it's now available in English and also accepts international credit cards. 谢谢 very much.
Great for rides in Southeast Asia
Grab is Southeast Asia's homegrown option that's in 30 cities across Malaysia, Philippines, Singapore, Thailand, Vietnam, and Indonesia. If you're not tied to Uber (we know it's always easier to not have to download another app), Grab is a great option that works similarly.
Great for affordable, carpool style rides in Europe
BlaBlaCar is a popular option for getting rides between cities in Europe (and increasingly parts of Central/South America). When a BlaBlaCar driver is going on a specific route and you tell BlaBlaCar you are too, you'll get matched up and pay a fee that's usually cheaper than the train or plane. It's basically new age hitchhiking made for the trust age (ya we just wrote that).