On a recent Thursday afternoon, Miki Safronov-Yamamoto, 18, and several housemates sat in mismatched chairs around the dining table in their two-story stucco home in San Francisco’s Glen Park neighborhood. Between sending emails and checking LinkedIn messages, they discussed how to host a “demo day,” where they and their other house members would show off to investors the start-ups they were building.

Ms. Safronov-Yamamoto, the youngest member of the house and a rising sophomore at the University of Southern California, glanced up from her laptop and declared that they “should low-key talk” more about how long their presentations should be. Maybe three minutes, she suggested.

“Is the audience mostly investors?” asked Ava Poole, 20, who is creating an artificial intelligence agent to make digital payments easier.

“A lot of investors, but also founders,” replied Ms. Safronov-Yamamoto, who is working on an A.I. start-up that helps detect medical billing mistakes. Next to them, Chloe Hughes, 21, who is making an A.I. platform for commercial real estate deals, bobbed her head to Sabrina Carpenter’s “Busy Woman” playing in the background.

They were part of FoundHer House, a “hacker house” that was established in May and geared specifically toward women. The goal of the house — a co-living environment for techies to hack away at problems while saving on expenses — was to create a supportive community for its eight residents to build their own companies in the nation’s technology capital.

That makes FoundHer House a rare experiment. As Silicon Valley has been gripped by a frenzy over artificial intelligence, attracting technologists and young people who want to work on this new wave, emerging A.I. start-ups and hacker houses have been dominated by men, according to investors and funding data.

That means the A.I. boom is set to perpetuate the longtime demographics of the tech industry, which remains disproportionately male. Sam Altman of OpenAI, Jensen Huang of Nvidia, Dario Amodei of Anthropic and other male tech executives are among the names most often associated with the A.I. push.

Navrina Singh, 45, the chief executive of Credo AI, a San Francisco company that helps businesses analyze A.I. tools, said there was “absolutely” a disparity in the number of women versus men leading A.I. firms. She could think of just a handful headed by women, she said, including Fei-Fei Li, the chief executive of World Labs, and Mira Murati, the chief executive of Thinking Machines Lab.

“We’re not seeing as many women, and the few women who are leading the charge in artificial intelligence, I would say, they’re not well capitalized, they’re not well funded,” Ms. Singh said.

Of 3,212 venture capital deals with A.I. start-ups this year through mid-August, fewer than 20 percent were with companies that had at least one female founder, according to data from PitchBook, which tracks the industry.

FoundHer House has been trying to defy that trend. Founded by Ms. Safronov-Yamamoto and Anantika Mannby, 21, a University of Southern California student who is building a digital shopping start-up, it added six other members, including Ms. Poole and Ms. Hughes.

The others are Sonya Jin, 20, who is building a start-up to help train A.I. agents; Danica Sun, 19, who is working on a clean energy start-up; Fatimah Hussain, 19, who is creating an online mentoring program for high schoolers; and Naciima Mohamed, 20, who is working on an A.I. tool to help children understand medical diagnoses.

“Everyone’s building,” Ms. Safronov-Yamamoto said.

Yet for all the big dreams, FoundHer House is closing on Tuesday. Ms. Safronov-Yamamoto, Ms. Mannby and four other residents are headed back to college. Two — Ms. Jin and Ms. Mohamed — have dropped out of school to continue building their companies. Of the eight start-ups being worked on, two have raised money from investors and two have launched products.

Some of the women discussed continuing to run the house remotely, but agreed it was too logistically difficult. After the effort winds down, Ms. Mannby said, “there might be a little bit of a deficit” for women to gather in person and find community. But, she added, “this is a battle that’s not won in a summer.”

She and Ms. Safronov-Yamamoto created FoundHer House when they decided to move to San Francisco for the summer to accelerate their start-ups. They researched neighborhoods and looked into living in well-known hacker houses. But apartment rents were high, and many hacker houses were occupied predominantly by men, they said.

So they made their own. After scouring Zillow for affordable housing in safe neighborhoods, they found an Airbnb in Glen Park, 20 minutes south of downtown San Francisco. The four-bedroom, three-bathroom home was fully furnished and cost about $40,000 to rent for the summer, Ms. Safronov-Yamamoto said.

Expenses were defrayed with a $500 donation from the venture capital firm Precursor Ventures, $1,000 from the angel investor Alice Leung and $10,000 from Brad Feld, a partner at the venture fund Foundry Group and co-founder of the start-up accelerator TechStars.

Mr. Feld said he wanted to help because tech companies had been disproportionately founded by men and the young women were taking action “in the middle of this moment” where technology is changing in the A.I. boom.

“I love to be the person that tosses the first money in and says: ‘That’s a cool idea. Let me help you get going,’” he said.

Ms. Mannby and Ms. Safronov-Yamamoto then created a website, an Instagram account and a LinkedIn page advertising FoundHer House, with a link to apply for residency. They took calls with women around their age, looking for kind people who were committed to their start-ups and would “not hesitate to make that intro” for one another, Ms. Safronov-Yamamoto said. Each pays $1,100 to $1,300 a month in rent.

Ms. Mohamed said the hacker house was the “perfect place” for her to build confidence with her start-up. FoundHer House was the only place she applied to for housing after seeing it on social media. One long direct message and a phone call with Ms. Safronov-Yamamoto later, she was in.

“I did not want to come to San Francisco and just isolate myself as I’m building,” said Ms. Mohamed, who moved from Minnesota after dropping out of the University of St. Thomas. “I knew I wanted to plug myself into the community.”

Over the past few months, FounderHer House became a hot spot for dinners and panel discussions sponsored by venture capital firms such as Andreessen Horowitz and Bain Capital Ventures. Recently, the venture firm Kleiner Perkins sent a hibachi chef to cook dinner on the back patio for its female summer fellows and FoundHer’s residents.

“Supporting people that are building something new and really committing to the start-up environment is something that I really wanted our KP fellows to see and experience firsthand,” said Dana Schafer-Smith, director of technical talent and head of the fellowship program at Kleiner Perkins.

Hosting a demo day to showcase their start-ups was the “culmination” of everything the residents had built at FoundHer House, Ms. Mannby said. They began planning the event last month, securing a venue and a commitment from the financial tech company Rho to supply the food. In the final 48 hours before the event, the women pulled two consecutive all-nighters working on their presentations with one another.

The demo day took place on Aug. 19 at Entrepreneurs First, a space for founders, in downtown San Francisco. Ms. Mannby and other FoundHer House residents arrived at 4 p.m. to set up 150 folding chairs in front of a stage.

Soon every chair was filled with investors and others, leaving standing room only. Each FoundHer House resident took a turn onstage, between two large screens, spending about four minutes explaining her start-up. (One sat out the presentation because she plans to show off her start-up at a different event.)

“This is one of the better demo days I’ve ever gone to in my professional career,” said Aileen Lee, the founder of Cowboy Ventures. Noting the lack of women in A.I., she added, “We have a lot to do, because when you look at the numbers, there’s a lot of room for improvement.”

After wrapping up the demo day, FoundHer House’s members returned to the house for a sleepover-style last hurrah, with an Oreo-flavored ice cream cake and a slide show to reminisce about the summer. Most said they would pack up and move out by Sunday.

As a parting gift, Ms. Safronov-Yamamoto made stickers with the FoundHer House logo for each resident.

“It’s definitely bittersweet,” she said. “I was kind of sad, but like happy we had the opportunity to be together this summer.” Then she added, “I’m also like very excited and ready for the next chapter.”