All 3 of Elon Musk's companies are in MIT's list of the 50 smartest businesses

TheMIT Tech Reviewhas compiled a list of the 50 'smartest' companies in the world. Elon Musk's Tesla tops the list, while the Chinese mobile and wearables upstart Xiaomi comes in second.TheReviewgives Tesla props foritsnewline 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, whichexpandedinto the U.S.this year.A number of health-related companies found their way onto the this year's list.The DNA analysis startupCounsylcomes in at No. 5 on the list. Counsyl's 'cheap, automated DNA analysis is expanding from prenatal testing to cancer screening,' theReviewsays.AliveCore places 14th for itsiPhone-connected heart monitoringdevices. The mainly-phone-based telemedicine service Teledoc takes the No. 27 spot.Teledoc will IPOin early July.Apple places No. 16 for its 'well-designed' Apple Pay service. Microsoft takes No. 48 for its HoloLens augmented reality device.SEE ALSO:Carl Icahn made around $2 billion on NetflixJoin the conversation about this storyNOW WATCH: 6 scientifically proven features men find attractive in women
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