AI sales startup Rox has raised $100 million in Series B funding at a $1.3 billion valuation, and it's spending that money on one fight: taking on Salesforce.

General Catalyst and March Capital co-led the round, Rox told Fortune exclusively. Sequoia and GV returned, while Prosperity7 — the venture arm backed by Saudi Aramco's ecosystem — joined as a new investor.

The pitch is simple. Customer relationship management (CRM) software shouldn't just store information. It should put it to work. Rox deploys AI agents — autonomous software programs that carry out tasks without step-by-step human instruction — that research customer accounts, recommend which prospects to prioritize, and prepare outreach. Salespeople get less administrative burden. They get more time with clients.

Why does the founder think Salesforce is beatable?

Ishan Mukherjee, Rox's cofounder and CEO, built his conviction inside the machine he now wants to replace. Before Rox, he started Pixie Labs, which New Relic acquired for roughly $150 million in 2020; he then became New Relic's chief growth officer.

"While running a public company through COVID, I deeply understood that every business relies on Salesforce specifically and their CRM to run their business. That was not the futureproof approach as AI was about to hit scale," Mukherjee said.

"There are going to be autonomous agents that do customer-facing commercial work across large parts of the economy, not just tech companies," he added. "And do we think Salesforce is the right partner to help CEOs in the C-suite to actually transform their businesses? I came out of an experience where it was not true."

He also spotted a structural crack. Massive companies including Nvidia and Intel, he said, have moved customer data out of Salesforce and into their own environments. "What that means is the world's largest in-app application company, which is Salesforce, was becoming less of a moat, less entrenched," Mukherjee said.

What does the team bring to the fight?

Salesforce carries a $172 billion market cap, so Rox needs more than a thesis. Mukherjee points to his cofounders' track record in foundational technology:

• Shriram Sridharan, a founding member of AWS's Amazon Aurora database service
• Diogo Ribeiro, a former Google employee
• Christopher Ré, a Stanford AI Lab professor
• Mukherjee himself, a former product lead for Apple's Siri Knowledge Graph

That roster is why General Catalyst invested in 2024 — pre-product and pre-revenue — according to partner Marc Bhargava, who described Rox as "a talent magnet."

Bhargava is under no illusion about the difficulty. "For a long time there's been a graveyard of companies that said 'I'm taking on ServiceNow or Workday. I'm taking on Salesforce,'" he told Fortune. Sticky customer relationships and deep capital pools kept those incumbents in control. "But AI is a moment in time to displace many of them."

Wall Street has felt the same tremor. In 2026, fears of AI-driven disruption repeatedly sent software stocks tumbling in what traders nicknamed the "SaaSpocalypse."

Can a fresh code base really beat a retrofit?

Rox's core argument is architectural. AI-native startups can build around agents from the start, while incumbents bolt them onto decades-old software. Bhargava offered a building analogy: "It's like you have a house and you just throw in one more floor, versus from the beginning you decided it was going to be a four-floor home."

"It's a huge opportunity for people to start fresh with a fresh code base built around [large language models]…Those products are ultimately better," he said.

What do the numbers on each side look like?

The incumbents remain formidable. Salesforce generated $41.5 billion in revenue for fiscal 2026 and says it has worked with more than 150,000 companies. ServiceNow ended its latest quarter with 680 customers each spending over $5 million in annual contract value.

Rox's counterweight is traction. Its early customers include Ramp, New Relic, Trafigura, MongoDB, Groq, and America's Auto Auction. The startup says annual recurring revenue (the predictable yearly revenue from subscriptions) has grown more than tenfold since its first year after launch.

The new capital will fund more AI research and product development. Rox also plans to expand its U.S. sales, marketing, and commercial team fivefold next year.

"Us in venture, our whole thing is to back the Davids against the Goliaths," Bhargava said. "And we think that this will happen here."