Amsterdam-Based Email Security Firm Zivver Acquired By California Based Kiteworks

Kiteworks runs a Private Data Network that enables secure sending, sharing, receiving, and usage of private data. The network serves more than 100 million end-users and 1,500 enterprises worldwide.

In August 2024, Kiteworks secured $456 million in growth equity funding from Insight Partners and Sixth Street Growth to fuel its global expansion efforts.

Zivver, founded in the Netherlands a decade ago, offers secure data exchange tools focused on email security, data classification, human error prevention, and zero-access encryption.

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The platform supports secure email, file transfer, and eSignature services that ensure neither the company nor its cloud providers can access user data — reducing exposure to laws like the US CLOUD Act.

As demand grows for sovereign and broad-based communication tools, Zivver sought a partner for expansion. With around 130 team members and offices in Amsterdam, London, and New York, it now supports over 11,000 organisations in maintaining privacy on Microsoft and Google platforms.

Following its acquisition by Kiteworks, Zivver will expand its private data exchange offerings with sovereign deployment options across on-premise, private, and public cloud environments — helping meet increasing demand from European governments and enterprises and unlocking growth in new global markets.

Wouter Klinkhamer, CEO of Zivver, says, “Our objective was to join forces with a global leader that shares our vision for zero-access security and meets Europe’s stringent data sovereignty standards.”

“Kiteworks not only mirrors our philosophy on encryption and zero-trust data exchange but also offers on-premises and private cloud deployment options for monitoring all private data moving within, into, and out of organisations—including with countless third parties.”

“This synergy with Kiteworks enables us to deliver zero-trust data exchange for every send, share, receive, and use of private data—regardless of the channels. This enables us to prevent everything from human-error data leaks in emails to the safeguarding of large file transfers, all under the customer’s control.”

Kiteworks, headquartered in Silicon Valley and serving over 100 million users across 1,500+ global enterprises and government agencies, provides a platform that monitors how, when, and where sensitive data is shared—helping prevent breaches and ensure compliance.

With a strong global presence and established customer base in Europe, Kiteworks plans to leverage its reach to bring Zivver’s secure email, data protection, classification, and human error prevention tools into new international markets, particularly where zero-trust data exchange is essential.

Amit Toren, Chief Business Officer at Kiteworks, says, “Organisations require comprehensive solutions that protect private data shared and sent across all communication channels while maintaining seamless user experiences.”

“By bringing Zivver’s innovative secure email technology into our Private Data Network, we’re providing the combined customer base with enhanced capabilities to secure their most sensitive communications while meeting stringent compliance requirements.”

“This acquisition reflects our focus on continuous innovation in secure data exchange, including AI-based data protection, coupled with the continued growth in our talented global team.”

Rick Goud, Chief Innovation Officer at Zivver, adds, “The challenges surrounding data sovereignty—especially in Europe—require solutions that don’t compromise on user-friendliness while still meeting the highest standards of security and compliance. The Zivver-Kiteworks combination makes this possible by giving organisations full control over where their data is stored, while ensuring compliance with regional regulations.”

“I’m not aware of any other solution worldwide that offers this level of flexibility in terms of supported use cases, hosting models, and security features. This will create major opportunities for both our existing and future customers who are looking to reduce their dependency on the ‘American cloud’ in these dynamic times of geopolitical uncertainty.”

About Zivver

Founded in 2015, Zivver offers an all-in-one email security solution designed to tackle evolving risks like human error, cyber threats, and compliance issues.

Its tools help block harmful emails, prevent data leaks, stop domain misuse, and boost security awareness among teams. Available as standalone features or a full suite, Zivver provides 360-degree protection that’s easy to use, quick to deploy, and works seamlessly with your existing email client.