State Farm insurance agents will use Detroit-based Quicken Loans Inc.'s online mortgage service, Rocket Mortgage, to originate mortgage loans under a new exclusive agreement that joins the top home and auto insurance provider with the largest retail mortgage originator.

Rocket Mortgage is building technology for State Farm that will come out over the next few months, the companies said in a news release.

"Through this alliance, we will be able to combine Rocket Mortgage's powerful mortgage processing and underwriting technology with the advice and strong relationships built from the power of the State Farm agent network," Quicken Loans CEO Jay Farner said in the release.

Housing and mortgage publication HousingWire quantified the alliance between the two leaders in their fields as "massive."

Until the changeover, State Farm agents will continue originating customers' mortgages and helping with home financing through the company's banking unit, State Farm Bank, the company said on its website. Once the Rocket Mortgage deal takes effect, new mortgage loans will go through Quicken Loans.

State Farm Bank's pre-rollout mortgage customers won't be affected by the change, according to the release.

Details of the agreement were not disclosed. Crain's requested more information on the partnership from Quicken Loans and State Farm.

State Farm agents will be able to help provide customers with conventional Fannie Mae or Freddie Mac, FHA, VA, USDA, and Jumbo mortgages, the release said.

Dan Gilbert's Quicken Loans, ranked as the largest retail mortgage originator in the country in 2018, introduced Rocket Mortgage in late 2015 as the first completely online mortgage lender service. It allows prospective home buyers to be approved for a mortgage quickly via smartphone. Now Rocket Mortgage is used in 98 percent of Quicken Loans-originated home loans.

Quicken Loans has an expertise in technology that puts it ahead of competitors and in a place to mop up more market share as technology constrains smaller mortgage companies, Greg McBride, chief financial analyst for New York financial services company Bankrate LLC, told Crain's earlier this year.

It's now using that digital prowess to claim more business through State Farm, which says its group of companies is the biggest auto and home insurance provider in the U.S.

Parent company State Farm Mutual Automobile Insurance Co. operates the State Farm group with around 19,000 agents and 58,000 employees working on 83 million accounts and policies in auto, fire, life, health and banking.