MOUNTAIN VIEW — Bus drivers who shuttle Google workers to the tech company’s corporate campus will get a roughly 20 percent raise and better benefits next month.

Google told its five shuttle contractors Wednesday to pay drivers an average of $24 per hour, with the increase depending on the shuttle company and what workers made before.

The Internet search giant will also begin funding a 15 percent premium for drivers who work a split shift, a relief for those who wake up early to slog through the Bay Area’s morning commute, only to idle near Mountain View for several unpaid hours before taking Google engineers back home.

The overtures come amid a growing Silicon Valley labor movement that has unionized some companies’ shuttle drivers — but not yet Google’s — and also sought to lift up janitors, cooks, security guards and other service workers who buttress the high-tech economy.

“It’s a not-so-veiled attempt to cool our jets,” said Rome Aloise, international vice president of the Teamsters Local 853. “I don’t think people are falling for it.”

Aloise said “the money is one thing. We’re proud we’re the reason they’re getting this money,” but Google’s shuttle drivers still deserve pensions, grievance procedures, sick leave, longer vacations and other protections.

Shuttle drivers for some of the contractors for Yahoo, Apple, Genentech, eBay and Zynga voted to join the Teamsters last month, following the lead of Facebook drivers, who joined the union in November.

Apple also revealed this month that it will raise hourly wages for its more than 150 drivers by about 25 percent, while also giving them a split shift premium and access to break rooms. Google already invites drivers to use its gyms and cafes.

Google has the largest fleet of buses, most of which it owns. More than 200 drivers make stops in San Francisco, Oakland and as far as Marin County and Santa Cruz carrying about 6,000 Google employees to work each morning.

“We value the drivers who help to get thousands of Googlers to work safely every day,” said a statement from Google on Wednesday night. “Since the fall we’ve been working with our vendor partners to address their concerns, by reducing the number of split shifts and increasing the hourly wages.”

Google will also introduce added health benefits that will cover at least 80 percent of health care costs for drivers and their dependents. The shuttle contractors will also begin a 401(k) match plan. Google has not provided information about the range of wages drivers will be paid.

At Facebook, where the Teamsters recently signed a new contract that goes into effect Monday, hourly wages will now range from $21 for a first-year minibus driver to $29.15 for a more experienced double-decker bus driver on a split shift.

Aloise said last year’s movement by Facebook drivers who work for contractor Loop Transportation “lit a fire under the industry” and is responsible for this month’s moves by Apple and Google to pay more attention to drivers’ concerns.

Staff writer Julia Love contributed to this report. Contact Matt O’Brien at 408-920-5011.