Proofpoint to buy Varonis for $6.3 billion in cash

Proofpoint agreed on October 15, 2026, to buy Varonis Systems for about $6.3 billion in cash, or $49.75 a share. Proofpoint, owned by private equity firm Thoma Bravo, sells email and people-focused security. Varonis tracks where a company's sensitive data sits and who can reach it. The deal joins two large security vendors around one idea: as AI agents get access to company data, protecting that data becomes the main job.

Varonis is listed on Nasdaq. When the deal closes, its shares stop trading and it becomes a private company, according to Varonis's announcement, filed with the SEC.

The terms of the deal

Term	Detail
Price	$49.75 per share in cash
Deal value	About $6.3 billion
Premium	52% over the June 22, 2026 close of $32.71; 17% over the September 1 close of $42.35
Valuation	About 53 times free cash flow and 8.4 times revenue, for the 12 months to June 30, 2026
Financing	Equity from Thoma Bravo plus debt; Ontario Teachers' Pension Plan will invest in Proofpoint
Closing	First half of 2027, pending Varonis shareholder and regulatory approval

June 22 was the last full trading day before the first sale rumors, the announcement says. Reuters, in a report carried by KSL, puts the equity value at $5.71 billion. No other source gives that figure, and none explains the gap from the $6.3 billion headline.

Varonis's board approved the deal unanimously. A committee of independent directors ran a review that included outreach to strategic and financial buyers, the announcement says. Varonis shares rose about 2.7% in after-hours trading on October 15, Reuters reports.

The sources differ on timing. Proofpoint's own deal page says closing is expected in the first quarter of 2027. Varonis's announcement, Reuters and the other reports say the first half of 2027.

What each company sells

Proofpoint protects people from phishing, fraud and email attacks, CyberScoop reports. It also sells data loss prevention, the tools that stop sensitive files leaving a company, and insider threat tools. Varonis maps where sensitive data lives, who can open it and how it is used.

The companies pitch the deal around AI agents, software that takes actions on its own. "AI agents are increasingly accessing sensitive information and taking action across systems," Proofpoint CEO Sumit Dhawan said in the announcement. Varonis CEO and co-founder Yaki Faitelson said: "Our mission is to secure AI and the data that powers it."

Together the companies will serve more than 16,000 enterprises, the announcement says. Both have been buying already. Proofpoint bought Acuvity in February and Hornetsecurity for a reported sum of over $1 billion, while Varonis paid $150 million for AllTrue.ai, CyberScoop notes. In a separate deal this week, Cohere said it plans to buy AI security startup AISLE.

What happens to Varonis customers

Nothing changes before closing. Varonis keeps operating on its own, its teams stay the point of contact, and the two companies do not share customer data, Proofpoint's deal page says.

After closing, Proofpoint plans to streamline account management and support and to integrate the two product lines. It says no product decisions have been made. Varonis will report third-quarter results on November 3, 2026, with no earnings call, according to SecurityBrief.

What this means for developers

• Check your renewal dates. If a Varonis contract renews after mid-2027, it may renew under Proofpoint. Ask now what pricing and terms will carry over.
• Watch for overlap. Proofpoint already sells data loss prevention and insider threat tools. Teams that run both vendors should expect one product line to be favored after integration.
• Map what your AI agents can read. The deal is built on the risk of AI agents with broad data access. Whatever tool you use, list which data stores your agents can reach and cut what they do not need.
• Plan for fewer independent vendors. Proofpoint calls this vendor consolidation. Buyers who want a separate data security product should review the remaining independent options before 2027.
• Expect no change before closing. Support, contacts and products stay the same until the deal closes, Proofpoint says. Any migration plan can wait for the product roadmap.