Origins and funding Pradeep Sindhu, a scientist with
Xerox's
Palo Alto Research Center (PARC), and founded the company in February 1996. Sindhu wanted to create
data packet-based routers that were optimized for Internet traffic (
packet switching), He was joined by engineers Bjorn Liencres from
Sun Microsystems and Dennis Ferguson from
MCI Communications. Sindhu started Juniper Networks with $2 million in
seed funding, which was followed by $12 million in funding in the company's first year of operations. About seven months after the company's founding,
Scott Kriens was appointed CEO to manage the business, while founder Sindhu became the
Chief Technology Officer. By February 1997, Juniper had raised $8 million in
venture funding. Later that year, Juniper Networks raised an additional $40 million in investments from a round that included four out of five of the largest telecommunications equipment manufacturers:
Siemens,
Ericsson,
Nortel and
3Com. Juniper also received $2.5 million from
Qwest and other investments from
AT&T.
Growth and IPO Juniper Networks had $3.8 million in annual revenue in 1998. Juniper Networks's market share for
core routers grew from 6% in 1998 to 17.5% one year later, and 20% by April 2000. Juniper Networks filed for an
initial public offering in April 1999 and its first day on the
NASDAQ was that June. The stock set a record in first-day trading in the technology sector by increasing 191% to a market capitalization of $4.9 billion. According to
Telephony, Juniper Networks became the "latest darling of Wall Street", Within a year, the company's stock grew five-fold. That same year, Juniper Networks moved its headquarters from
Mountain View to
Sunnyvale, California. According to
Businessweek, "analysts unanimously agree[d] that Juniper's boxes [were] technically superior to Cisco's because the hardware does most of the data processing. Cisco routers still relied on software, which often results in slower speeds." Cisco had grown through acquisitions to be a large generalist vendor for routing equipment in homes, businesses and for ISPs, whereas Juniper was thought of as the "anti-Cisco" for being a small company with a narrow focus. In January 2001, Cisco introduced a suite of router products that
Businessweek said was intended to challenge Juniper's increasing market-share. Cisco's routers were not expected to erode Juniper's growing share of the market, but other companies such as
Lucent,
Alcatel, and startups Avici Systems and Pluris had announced plans to release products that would out-pace Juniper's routers. By 2004, Juniper controlled 38% of the core router market. By 2007, it had a 5%, 18% and 30% share of the market for enterprise, edge and core routers respectively.
Alcatel-Lucent was unsuccessful in challenging Juniper in the core router market but continued competing with Juniper in edge routers along with Cisco.
Further development In late 2000, Juniper formed a joint venture with
Ericsson to develop and market
network switches for internet traffic on mobile devices, and with
Nortel for
fiber optic technology. In 2001, Juniper introduced a technical certification program and was involved in the first optical internet network in China. and revenues fell by two-thirds during the
dot-com bust. 9 to 10% of its workforce was laid off. Juniper had rebounded by 2004, surpassing $1 billion in revenues for the first time that year and reaching $2 billion in revenue in 2005. Beginning in 2004, with the acquisition of
NetScreen, Juniper Networks began developing and marketing products for the enterprise segment. Juniper had a reputation for serving ISPs, not enterprises, which it was trying to change. By 2005, enterprise customers accounted for one-third of the company's revenues, In 2006, more than 200 US companies restated their financial results due to a series of investigations into
stock backdating practices. Juniper stockholders alleged the company engaged in deceptive backdating practices that benefited its top executives unfairly.
2008–2025 In July 2008, Juniper's first CEO,
Scott Kriens, became chairman and former
Microsoft executive
Kevin Johnson was appointed CEO. Johnson focused the company more on software, creating a software solutions division headed by a former Microsoft colleague,
Bob Muglia. Juniper established partnerships with
IBM, Microsoft and
Oracle for software compatibility efforts. The SSL/VPN Pulse product family was launched in 2010, then later spun off to a private equity firm in 2014 for $250 million. In 2012, Juniper laid off 5% of its staff and four of its high-ranking executives departed. The following year, CEO
Kevin Johnson announced he was retiring once a replacement was found. In November 2013, Juniper Networks announced that
Shaygan Kheradpir would be appointed as the new CEO. He started the position in January 2014. In January 2014,
hedge fund, activist investor and Juniper shareholder
Elliott Associates advocated that Juniper reduce its cash reserves and cut costs, before Kheradpir was officially appointed. That February, Juniper reached an agreement with Elliott and other stakeholders for an Integrated Operating Plan (IOP) that involved repurchasing $2 billion in shares, reducing operating expenses by $160 million and appointing two new directors to its board. That April, 6% of the company's staff were laid off to cut expenses. In November 2014, Kheradpir unexpectedly resigned following a review by Juniper's board of directors regarding his conduct in a negotiation with an unnamed Juniper customer. An internal Juniper executive, Rami Rahim, took his place as CEO. In May 2014,
Palo Alto Networks agreed to pay a $175 million settlement for allegedly infringing on Juniper's patents for application firewalls. In 2015,
Wired magazine reported that the company announced it had found unauthorized code that enabled
backdoors into its
ScreenOS products. The code was patched with updates from the company. to boost HPE's networking and
artificial intelligence resources. The acquisition was contested by the
U.S. Department of Justice (DOJ) in January 2025, citing concerns about reduced competition and innovation, leading to higher prices for consumers. Following a settlement with the DOJ, in which HPE agreed to divest its
Instant On wireless division and license the source code for Juniper's Mist AI (a key component of Juniper's WLAN products), the acquisition was completed on July 2, 2025. Following the acquisition, Juniper was absorbed into
HPE Networking, with Raimi named the new head of this division. HPE will continue to market Juniper's former product line under the HPE Juniper Networking brand. Later that month,
Axios reported that the
U.S. Intelligence Community had earlier directly intervened to persuade DOJ to allow the acquisition, arguing that blocking the merger would have harmed U.S. companies and strengthened Chinese competitors—particularly
Huawei—framing the decision as critical to national security. ==Acquisitions and investments==