Companies born in or based in Palo Alto

Palo Alto is a city of about 68,000 people, yet the list of companies that started here or grew up here reads like a history of modern technology. Radio tubes, test instruments, microwave tubes, chips, personal computers, search, online payments, social networks, data software and electric cars all have a Palo Alto chapter. Some of those companies are still here. Many left once they got big.

This section profiles more than 60 of them in detail. Each profile sticks to dates and addresses we could check against company records, government filings, Stanford sources or major news outlets. Where sources disagree or a detail could not be confirmed, we say so or leave it out. For a route that strings the sites together on foot and by bike, use our famous tech addresses tour.

Founded here, based here or passing through

It helps to sort Palo Alto companies into three groups, because "a Palo Alto company" can mean very different things.

• Founded here. Hewlett-Packard, Fairchild Semiconductor, VMware, Palantir and Confinity all started inside city limits. IDEO formed here in 1991 out of a downtown design studio.
• Based here for a long stretch. Varian Associates moved into the first building in the Stanford Industrial Park in 1953. Xerox opened its research center here in 1970. Tesla ran its headquarters from Deer Creek Road for more than a decade.
• Passing through. Google spent a few months downtown in 1999. Facebook spent roughly seven years in Palo Alto before moving to Menlo Park. PayPal left for Mountain View in 2002.

The pattern is consistent. Companies come for Stanford graduates and nearby investors, rent whatever space they can get, then leave when they need a campus. The city itself has limited office space and strict rules on new building heights, so growth usually means moving.

Palo Alto companies at a glance

The table covers the best known names, with the Palo Alto addresses they used and what happened next. Dates refer to Palo Alto activity, not the whole life of the company. A few grew out of Stanford without ever keeping a Palo Alto office we could confirm. Some newer AI companies are based in neighboring cities. The table notes those cases.

The instrument and microwave era

Palo Alto's first technology firms made hardware for engineers. The Federal Telegraph Company, founded in 1909 by Stanford graduate Cyril Elwell, built radio equipment near what is now Channing Avenue and Emerson Street. A sidewalk plaque marks the spot.

Three decades later, Bill Hewlett and Dave Packard built audio oscillators in a garage a few blocks away. Their company grew into one of the largest technology firms in the world and anchored Palo Alto for more than 80 years. The Hewlett-Packard profile follows it from the garage to the 2015 split. The garage itself has its own page under attractions.

Varian Associates came out of the same Stanford circle. The Varian brothers had built the klystron, a microwave tube, at Stanford in 1937. Their company moved into the new industrial park on university land in 1953 and stayed for decades.

The research park era

Stanford could not sell its land, but it could lease it. In 1951 the university and the city created the Stanford Industrial Park, now called Stanford Research Park, along Page Mill Road. Varian, HP, Xerox, Lockheed and later Facebook, VMware and Tesla all leased space there. Our guide to Stanford Research Park explains how the ground leases work.

Xerox's Palo Alto Research Center, opened in 1970, is the most famous research park tenant. Its researchers built the Alto computer, Ethernet and laser printing. Xerox made money from the printers but left most of the computer ideas for others to sell. The Xerox PARC profile covers that story and the 2023 handover to SRI International.

The downtown internet era

In the late 1990s the action shifted to downtown Palo Alto. Small companies rented space above shops on University Avenue and its side streets. One building, 165 University Avenue, became famous because so many of its tenants made it big. Google moved in with eight employees in February 1999. Confinity, the startup that launched PayPal, used it as its second office. Logitech and the phone maker Danger also worked there.

Facebook arrived in 2004 and became the defining downtown company of the next decade. By 2009 it had spread across about ten downtown buildings before consolidating in Stanford Research Park. Palantir grew up downtown during the same years.

Big campuses and big departures

The 2010s brought the largest single company footprints the city had seen since HP's peak. VMware built a campus on Hillview Avenue. Tesla took a former HP and Agilent manufacturing complex on Deer Creek Road for its headquarters and powertrain work.

Then came a string of headline departures. Hewlett Packard Enterprise announced in 2017 that it would leave Palo Alto. Palantir moved its headquarters to Denver in August 2020. Tesla announced in December 2021 that its headquarters had moved to Austin, Texas. Each move made news, but in practice none of these companies left the region entirely. Tesla even came back in 2023 with a global engineering headquarters on Hanover Street. The Tesla profile has the details.

Who is here now

As of late 2026, the largest corporate headquarters in the city are HP Inc. on Page Mill Road and Broadcom on Hillview Avenue. Tesla's engineering headquarters, SAP's research park campus and Varian Medical Systems, now part of Siemens Healthineers, add thousands more jobs. Newer arrivals in Stanford Research Park include robotics and AI companies. General Motors leased about 340,000 square feet at 3411 Hillview Avenue in 2026.

Downtown still works as a first office for young companies. Turnover is high, so the names change every few years. Our startups hub covers today's ecosystem, accelerators and jobs.

How we checked these histories

Company histories get retold so often that small errors spread. We relied first on primary records: company press releases and history pages, SEC filings that list headquarters addresses, Stanford sources and state landmark listings. We then checked dates against major news coverage from the time. Some popular claims did not survive that check, so they are not here. When a profile says a detail is reported rather than confirmed, that is deliberate.

Addresses also change meaning over time. Stanford Research Park buildings are often renumbered, split or rebuilt. A building that housed one company in 1995 may hold three different tenants today. Each profile notes what is at the address now when we could confirm it.

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