Georgia Secretary of State Brad Raffensperger announced a deal with Salesforce to build a new voter registration system to replace a nine-year-old platform.
Last year's election may have been the "best administered," but officials are still seeking to stem the flood of disinformation that caused so much unrest.
"It has to stop," Gabriel Sterling, who manages the state's voting systems, said after a young technician received death threats fueled by far-right social media.
The Dominion Voting Systems equipment, which is the target of baseless rumors promoted by President Donald Trump, was an "unqualified success," officials said.
Republican Sens. David Perdue and Kelly Loeffler did not cite specifics in demanding that Secretary of State Brad Raffensperger, a fellow GOP member, resign.
Secretary of State Brad Raffensperger blamed malfunctions in the new $104 million system on user error, but election-security advocates argue the devices are unreliable.