In the second quarter 2017, ride-hailing service Uber gained 2% to claim 55% of ground transportation overall, according to the Certify SpendSmart Report for Q2 2017. Lyft added 2% to end the quarter with 8% of category receipts and expenses.

Taxi dropped to 8% of ground transportation overall. This is the first time that SpendSmart data shows taxi at a single-digit share of rides. Certify projects that taxi will fall under 1% of ground transportation expenses and receipts by Q1 2018. Car rental saw a two-point decline in business travel transactions with 29% of receipts and expenses in Q2.

Uber remained the top most expensed brand by the Certify system for the second quarter in a row. It increased 2% to 9% of all expenses and receipts.

“The revolution in ground transportation we're seeing today led by Uber and Lyft has far reaching implications for the future of corporate travel,” said Robert Neveu, CEO of Certify. “Business travelers' move toward greater personalization and convenience may have started with ride hailing, but it's not likely to stop there. Mobile technology brought us into a new age, and the expectation and ability to cater to the preferences of the individual is driving a cultural shift that will continue to effect dynamic change throughout the industry.”

For car rental, the top expensed brands included National (26%), Enterprise (16%), Hertz (14%), Avis (12%), and Budget (4%).

The Certify SpendSmart report tracks business travel expense spending across major categories such as food, airlines, lodging, and car rental. The data is collated based on transaction volume, not overall revenue in each category.

The report highlights top vendors and emerging trends by analyzing data from millions of expenses and receipts processed through the Certify system.