Hundreds of Google staffers met on Friday and discussed what activists allege is a frequent consequence of criticizing the company: Retaliation. Two leaders of recent company protests said they’ve been mistreated by managers and collected similar stories from other workers at the world’s largest internet company.

The claims of retaliation are the latest in a series of internal upheavals over issues ranging from the use of artificial intelligence for military purposes to executive misconduct and the rights of contract workers. Alphabet Inc.’s Google set the standard in Silicon Valley for employing and retaining scores of highly-trained computer scientists. But the recent troubles have hurt its reputation. Employees registered a decline of faith in Google’s executives in recent internal surveys. Several software coders refused to work on a project for the Pentagon last year, spiking the contract, and some resigned in protest.

In November, several employees organized a company walkout over payouts to executives facing sexual assault allegations. Around that time, the activists gathered 350 accounts of employee concerns.

On Monday, two of those organizers, Meredith Whittaker and Claire Stapleton, wrote an email saying Google had punished them because of their activism. The two asked staffers to join them on Friday to discuss the company’s alleged actions, and during the meeting they shared more than a dozen other stories of internal retribution that they had collected over the past week. Like many meetings at Google, participants could watch via a video live-stream and submit questions and comments.

"Now more than ever we need to reject retaliation, and reject the culture of fear and silence that retaliation creates," read an email from the event organizers, which Bloomberg News viewed. "The stakes are too high."

"We prohibit retaliation in the workplace and publicly share our very clear policy," a Google spokeswoman said in an emailed statement. "To make sure that no complaint raised goes unheard at Google, we give employees multiple channels to report concerns, including anonymously, and investigate all allegations of retaliation.”

Whittaker is a researcher at Google specializing in artificial intelligence. She co-founded a research group, AI Now, that is affiliated with New York University. Whittaker wrote to her colleagues in an email that she was told she would have to "abandon my work on AI ethics."

Stapleton, who works in the marketing department at YouTube, alleged that she was informed she was being demoted and later told to take a medical leave she didn’t need. After she retained a lawyer, Stapleton said, the company "walked back my demotion, at least on paper," but "the environment remains hostile and I consider quitting nearly every day."

In the email, Stapleton said that she arranged a meeting with Google’s human resources division after flagging changes to her job. She was told to go on sick leave. When she replied that she wasn’t sick, Stapleton wrote, the HR director said, "We put people on it all the time."

On Friday, Whittaker and Stapleton shared additional information about their situations in an internal post to colleagues.

Whittaker said that her manager, whom she did not name, told her that her AI ethics work "was no longer a fit." The manager said Google’s cloud division had plans to massively increase sales by "being everywhere Lockheed is," according to Whittaker. That’s a reference to the defense company Lockheed Martin Corp. Google’s work with the U.S. military was the subject of employee protests last year. A Google spokeswoman declined to comment on the mention of the cloud business.

Whittaker tried to get transferred to another Google AI team, a move she said was supported by Jeff Dean, the company’s head of artificial intelligence. Soon after, Whittaker was involved with another protest: an employee petition against the appointment of Kay Coles James to an AI ethics counsel organized by Google. The company ended up scrapping the group.

Two weeks after the petition, Whittaker said she learned that her planned transfer had been canceled and that her role at Google would be changing. "Continuing my work at AI Now and my work in AI ethics was not on the table," she wrote.

Oona King, Google’s director of diversity strategy, rejected at least one of the employee’s claims. "I can genuinely say when I’ve looked at the details of one of the cases, it isn’t as it appears here," she wrote, according to a message viewed by Bloomberg News.

Executives at YouTube and Google Cloud sent messages to staffers earlier this week disputing the accounts of Stapleton and Whittaker, according to a person who had seen them.

Several current and former employees took to Twitter on Friday to register complaints using the hashtag #NotOkGoogle, a riff on the company’s virtual assistant product. "This is just the tip of the iceberg," wrote Alex Hanna, a member of Google’s cloud division.

"I am grateful that I quit Google," wrote Liz Fong-Jones, an engineer and outspoken critic who left the company earlier this year.

"This is a pattern, these are systemic issues, and we will change if only by speaking up and acting together," Stapleton wrote in the email.

Google management publicly endorsed the employee walkout in the fall, giving the blessing for staff to vent frustration. But as dissent continued to rise inside Google, the company’s lawyers urged the U.S. government to give companies more leeway to reign in rebellious employees from organizing over workplace email.

Google made that filing in a case pending before the National Labor Relations Board involving alleged retaliatory discipline against an employee. Another complaint involving alleged retaliation against staff was filed with the agency this week.

Google unveiled another round of policy changes to address employee concerns about misconduct at the world’s largest internet search company.

Staff can now lodge complaints and concerns about harassment and other misconduct at work via a new website. During meetings related to investigations, workers will have more freedom to bring along colleagues to support them. There’s also a new program to provide better care for employees during and after investigations, the company said Thursday.

“We want every Googler to walk into a workplace filled with dignity and respect,” Google’s global director of diversity, equity, and inclusion, Melonie Parker, wrote in an email to employees, which was also posted publicly online.

By June, the Alphabet Inc. subsidiary will also complete a dedicated site for receiving concerns from temporary workers and vendors. Last year, temporary, vendor and contracted staff became a majority of Google’s workforce.

The latest changes come nearly six months after thousands of Google employees around the world staged walkout protests to demand changes to the way the company handles misconduct. In response, Google announced last November that it would stop forcing employees to handle sexual harassment and assault claims in arbitration rather than in court.

In February, the company announced a more sweeping change; dropping so-called forced arbitration for all current and future employees and allowing them to instead pursue courtroom class actions for all kinds of workplace complaints. Such moves, Parker wrote, “are all big changes that I hope show our real commitment.”

The internet giant came under fire this week from two leaders of last year’s walkout. They alleged in a message posted to internal mailing lists that Google has been retaliating against them. Google denied the claims. The employee activists, whose message was first reported by Wired, plan to hold a “town hall” meeting about the issue on Friday.

"What we see here is Google management scrambling to placate workers in the face of serious claims that the company retaliates against organizers and those who speak up about harassment and discrimination," the advocacy group Tech Workers Coalition said in a statement Thursday.