Proofpoint will buy data security firm Varonis for $6.3 billion in cash, merging email protection with data access controls.
Key points
- Proofpoint pays $6.3 billion in cash for Varonis Systems.
- The deal values Varonis shares at $49.75, a 52% premium.
- Combined company will serve over 16,000 enterprises.
Proofpoint has agreed to acquire data security company Varonis Systems for approximately $6.3 billion in an all-cash transaction. The companies announced the agreement on Thursday, ending months of speculation about Varonis's future ownership.
What happened
Thoma Bravo-owned cybersecurity firm Proofpoint will purchase Varonis Systems for about $6.3 billion in cash, according to Reuters. SiliconANGLE reported that Bloomberg first noted Varonis was fielding interest from private equity firms like Blackstone and Thoma Bravo in June. Proofpoint emerged as the buyer in early September talks. The $49.75 per share price represents a 52% premium over Varonis's stock price before reporting began.
Varonis was co-founded in 2005 by Yaki Faitelson, who remains chief executive. Early software mapped file access on corporate servers, while current offerings focus on artificial intelligence security. Proofpoint has made several acquisitions since Thoma Bravo took it private for $12.3 billion in 2021. Last year, Proofpoint bought German provider Hornetsecurity. Varonis also acquired phishing detection firm SlashNext in September 2025.
The combined entity will integrate Varonis data mapping with Proofpoint email and collaboration tools. More than 80 Fortune 100 companies already use Proofpoint. CEO Sumit Dhawan stated that AI agents now access sensitive information, making data controls critical. The merged company plans to integrate products and sales teams quickly after closing.
Why it matters
Acquisitions like this combine separate security tools into single platforms. Teams usually check whether new vendors can access their existing data securely. Organizations should verify how customer data is handled during mergers. It helps to understand which products will be retired or updated. This reduces confusion about support timelines and feature changes.
The fix
- Review current contracts with both Proofpoint and Varonis for change-of-control clauses.
- Monitor official announcements for updates on product integration timelines.
- Ensure access controls remain intact during any transition periods.
- Verify that support channels remain active for existing customers.
Why it matters
Security teams often manage multiple point solutions that do not communicate well. Mergers aim to unify these tools under one interface. Users should assess whether combined platforms simplify their workflows or add complexity. It is prudent to test new integrations in isolated environments first. This ensures that security policies are not inadvertently weakened during transitions.
What to do and how to stay safe: Proofpoint
- Check if your organization uses both Proofpoint and Varonis products.
- Contact your vendor account manager to ask about service continuity.
- Review data access logs to ensure no unauthorized changes occurred.
- Wait for official guidance before altering current security configurations.
Step-by-step guide: What is password policies and how they protect systems
General security guidance from the Crypt Weekly newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
How much is Proofpoint paying for Varonis?
Proofpoint is paying approximately $6.3 billion in cash for Varonis Systems.
Who owns Proofpoint?
Proofpoint is owned by private equity firm Thoma Bravo.
When was Varonis founded?
Varonis was co-founded in 2005 by Yaki Faitelson and Ohad Korkus.
