The MIT Tech Review has compiled a list of the 50 “smartest” companies in the world. Elon Musk’s Tesla Motors tops the list, while the Chinese mobile and wearables upstart Xiaomi comes in second.

The Review gave Tesla props for its new line of batteries “in service of a big goal: remaking the energy grid for industry, utilities, and residences.”

Xiaomi gets credit for its growing line of affordable Android smartphones and tablets, as well as for its ecommerce business, which expanded into the U.S. this year.

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A number of health-related companies found their way onto this year’s list.

The DNA analysis startup Counsyl comes in at No. 5 on the list. Counsyl’s “cheap, automated DNA analysis is expanding from prenatal testing to cancer screening,” the Review said.

AliveCore places 14th for its iPhone-connected heart monitoring devices. The mainly-phone-based telemedicine service Teledoc takes the No. 27 spot. Teledoc will IPO in early July.

Apple places No. 16 for its “well-designed” Apple Pay service. Microsoft takes No. 48 for its HoloLens augmented reality device.

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