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Zivver

Acquired

Founded 2015 Β· 53 employees on LinkedIn Β· 6 known investors

Amsterdam-founded provider of secure email, data-leak prevention and compliance software, now part of Kiteworks.

Also known as ZIVVER Β· Zivver a Kiteworks Company

Investors Β· 6

Also in the syndicate Β· 2

ABN AMRO Bank (innovation credit)henQ

Company profile

researched Aug 2026

Zivver is a secure business email and data protection vendor founded in Amsterdam in 2015 by Wouter Klinkhamer and Rick Goud. Its software adds a security and privacy layer on top of existing email systems such as Microsoft Outlook (desktop, Outlook Web Access and Microsoft 365) and Gmail/Google Workspace, as well as gateway deployments for organisations without a supported client. The core product encrypts email and large file transfers, scans message bodies and attachments for sensitive data while a message is being drafted in order to flag potential human error, and allows sent messages to be revoked.

The portfolio has broadened from secure email and file transfer into an "all-in-one" email security suite comprising Secure Email, AI-assisted Email Threat Protection, a DMARC/domain authentication service to counter spoofing and business email compromise, and adaptive security awareness training. Recipients do not need a Zivver account to open a secure message; they verify identity via SMS or manual one-time codes, a pre-set password, or email verification, and can reply inside Zivver's portal. Mobile apps are available for Android and iOS, and the web application runs in major browsers, although Outlook for Mac is not supported.

Zivver positions its offering around regulatory compliance, citing GDPR, NIS2, DORA, HIPAA and the Dutch NTA 7516 standard, and targets sectors that handle sensitive personal data. It is now part of Kiteworks following an acquisition.

Founding story

Zivver was founded in 2015 in Amsterdam by Wouter Klinkhamer and Rick Goud, on the premise that enabling effective access to information can drive positive change in society and that protection should be calibrated to the sensitivity of the information β€” excessive protection hampering productivity and insufficient protection exposing individuals and organisations. Goud has served as CIO/Chief Innovation Officer and co-founder and Klinkhamer as CEO and co-founder.

Business model

B2B software-as-a-service sold on subscription licences per user, with tiered plans (including Professional and Ultimate) that add Outlook, OWA and Gmail integration. Customers can add licences at any time and upgrade plans immediately, with downgrades taking effect at the end of the subscription term.

Subscription plans scaled to organisation size. No additional setup costs are charged for deployments of up to 50 users; larger or more complex environments can purchase implementation support and customised integration. Dutch customers can pay by direct debit or credit card; UK and US customers by credit card.

Traction

More than 10,000 organisations and over one million email accounts use Zivver, with a customer renewal rate above 95% and ten years in business. In October 2020 the company reported over 100 employees and 3,500 customer organisations, including 40% of Dutch hospitals and local government and the whole Dutch Judicial System.

Latest developments

Zivver has joined Kiteworks following its acquisition and is presented as "Zivver a Kiteworks Company." Recent activity includes being named Secure Communications Solution Provider of the Year in the CyberSecurity Breakthrough Awards 2024 and a collaboration with Claranet Benelux to deliver an EU-compliant secure email solution in the Benelux region.

β–ΈFull profile β€” market position, technology, go-to-market, geography, history

Market position

Positioned as a European email data protection specialist that supplements rather than replaces incumbent email security stacks such as Mimecast or Proofpoint, filling data-protection gaps above Microsoft Exchange/365 and Google Workspace. Gartner's 2020 Market Guide for Email Security identified Zivver as a Representative Vendor for Email Data Protection Specialists. At the time of its 2020 round it described itself as a European technology scale-up and a challenger in secure communications.

Zivver states it is the only vendor protecting digital information at all three stages of email and file transmission β€” before, during and after sending β€” combining encryption with behaviour-aware human error prevention rather than encryption alone. Recipients need no Zivver account, software installation or extra passwords, which the company frames as removing a common barrier to adopting secure communication.

Technology

Zero-knowledge AES-256-bit encryption with two-factor authentication and recipient verification, applied to both the content and context of communications. Contextual scanning of email bodies and attachments during drafting generates real-time alerts about potential data leaks; messages can be revoked after sending. Additional capabilities include AI-enhanced threat detection, malware and ransomware defence, secure large file transfer up to 5TB, secure eSignatures, and DMARC-based domain authentication. Delivery is via browser-based web application, Outlook and Gmail plug-ins, secure gateways, and Android and iOS apps.

Go-to-market

Direct enterprise sales supported by demo requests and published pricing, self-service onboarding for smaller teams, and channel and framework routes to market: a place on the UK government's G-Cloud 12 framework, a contract on the NHSX Clinical Communication Tools Procurement Framework in partnership with Barrier Networks, and reseller/partnership arrangements such as one with Claranet Benelux for the Benelux region. Content marketing through a resources hub, white papers and webinars supports demand generation.

Organisations handling sensitive data across healthcare, government and the public sector, legal, and financial services, ranging from small teams to large enterprises. Named reference customers include Chronic Care Staffing, GA Solicitors and South Kesteven District Council; Dutch public-sector users have included hospitals, local government and the Judicial System.

Geography

Headquartered in Amsterdam with an international presence; commercial operations span the Netherlands, the United Kingdom and the United States, and partner coverage extends across the Benelux region. Its 2020 funding was earmarked for expansion into the UK and other markets.

History

Founded in Amsterdam in 2015, Zivver took investment from Dawn Capital in 2018 and by October 2020 had grown to more than 100 employees and 3,500 customer organisations, including 40% of Dutch hospitals and local government and the entire Dutch Judicial System. In October 2020 it raised $17 million led by DN Capital with new investor SmartFin, bringing total funding to over $30 million, and used the proceeds to expand into the UK and other markets. In 2024 it was named Secure Communications Solution Provider of the Year in the CyberSecurity Breakthrough Awards. The company was subsequently acquired by Kiteworks and now operates as a Kiteworks company; by that point it described itself as ten years in business with more than 10,000 organisations and over one million email accounts using its service.

Compiled by commissioned research from 8 cited public sources β€” announcements, filings, and press listed under research sources below.

Key figures

latest reported
Customer organizationsOct 20203,500 organizations
Customer renewal rateJan 202595%
Email accounts using ZivverJan 20251,000,000
EmployeesOct 2020100 employees
Maximum secure file transfer sizeJan 20255 TB
Organizations using ZivverJan 202510,000 organizations
Share of Dutch hospitals and local government as customersOct 202040%
Total funding raised to dateOct 2020$30M
Years in businessJan 202510 years

Company-reported or press-reported figures, each dated to when it was claimed β€” not independently audited.

Timeline Β· 7

launches, deals, and filings
Jan 2025
Zivver acquired by Kiteworks

Dawn Capital lists Zivver's status as exited and states that Zivver was acquired by Kiteworks; Zivver's website and blog present the company as a Kiteworks company.

source β†—

Jan 2025
Claranet Benelux and Zivver collaboration

Partnership to provide organisations in the Benelux region with an EU-regulation-compliant secure email solution.

source β†—

Jan 2024
Named Secure Communications Solution Provider of the Year, CyberSecurity Breakthrough Awards 2024

Zivver was recognised for detecting and preventing data incidents in real time.

source β†—

Oct 2020
Zivver raises $17 million to accelerate international expansion

Zivver announced a $17 million funding round led by DN Capital with new investor SmartFin and participation from existing investors henQ and Dawn Capital, supplemented by an innovation credit from ABN AMRO Bank, bringing total funding to over $30 million. Proceeds were earmarked for expansion into the UK and other markets and for extending the platform into digital signatures, secure forms and secure video.

$17M source β†—

Oct 2020
Contract on NHSX Clinical Communication Tools Procurement Framework with Barrier Networks

Zivver was awarded a contract on the NHSX Clinical Communication Tools Procurement Framework in partnership with Barrier Networks.

source β†—

Oct 2020
Awarded place on UK government G-Cloud 12 Framework

Zivver secured a place on the UK government's G-Cloud 12 Framework for its Cloud Software services.

source β†—

Jan 2018
Dawn Capital invests in Zivver

Dawn Capital records 2018 as the year it invested in Zivver and published a 'Why we invested in ZIVVER' note in October 2018.

source β†—

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

β–ΈResearch sources Β· 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Zivver do?
Amsterdam-founded provider of secure email, data-leak prevention and compliance software, now part of Kiteworks.
Who are Zivver's investors?
Zivver's investors include Dawn Capital, DN Capital, henQ vc, SmartFin.