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Founded Year



Incubator/Accelerator | Alive

Total Raised


Mosaic Score

+30 points in the past 30 days

What is a Mosaic Score?
The Mosaic Score is an algorithm that measures the overall financial health and market potential of private companies.

About Tessian

Tessian is an email security platform that uses machine learning to make sure sensitive or confidential data cannot be sent to the wrong individual. The solution scans historical email data to understand conventional usage patterns and behaviors in companies' email systems. By leveraging machine learning, the platform spots anomalies and give users a chance to correct problems before sending without requiring administration or end user behavior change.

Tessian Headquarter Location

3 Finsbury Avenue

London, England, EC2M 2PA,

United Kingdom

+44 (0) 208 068 5223

ESPs containing Tessian

The ESP matrix leverages data and analyst insight to identify and rank leading companies in a given technology landscape.

Fintech / Cybersecurity

In this market, companies reduce the risk associated with the cybersecurity X-factor — human behavior — by providing cyber training solutions, insider risk detection, phishing defense, and employee risk mapping.

Tessian named as Highflier among 8 other companies, including Proofpoint, IRONSCALES, and Rangeforce.

Enterprise IT / Cybersecurity

These solutions monitor data access, usage, and sharing to identify anomalous activity that may indicate abuse.

Tessian named as Highflier among 11 other companies, including Kiteworks, Digital Guardian, and DTEX.

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Research containing Tessian

Get data-driven expert analysis from the CB Insights Intelligence Unit.

CB Insights Intelligence Analysts have mentioned Tessian in 6 CB Insights research briefs, most recently on Apr 6, 2022.

Expert Collections containing Tessian

Expert Collections are analyst-curated lists that highlight the companies you need to know in the most important technology spaces.

Tessian is included in 9 Expert Collections, including Banking.



1,097 items



1,341 items

Technology that addresses regulatory challenges and facilitates the delivery of compliance requirements in FIs. Regulatory technology helps FIs and regulators address challenges ranging from traditional compliance and risk management to data reporting and transmission.


Cyber Defenders

28 items

Our selected startups are early- to mid-stage high-momentum companies pioneering technology with the potential to transform cybersecurity.Unicorns valued at $1B+, companies that have raised funding past the Series C stage, and companies that have not raised funding since 2017 are


Artificial Intelligence

8,694 items

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Future Unicorns 2019

50 items

Tessian Patents

Tessian has filed 1 patent.

The 3 most popular patent topics include:

  • Email
  • Email clients
  • MacOS email clients
patents chart

Application Date

Grant Date


Related Topics




Email, Windows email clients, Email clients, MacOS email clients, Spamming


Application Date


Grant Date



Related Topics

Email, Windows email clients, Email clients, MacOS email clients, Spamming



Latest Tessian News

Tessian Appoints Chief Financial Officer to Continue Growth in North America Market

May 12, 2022

By Reading Time: 2 minutes San Francisco, 12 May 2022 – Email security company Tessian today announces the appointment of its new Chief Financial Officer, Daniel Kim to supercharge the company’s fast-paced growth and their expansion in the North America market. Kim has 20 years of financial and operational management experience and most recently served as Vice President of Finance and Accounting at Lookout , a leading cybersecurity provider of endpoint-to-cloud security. Here, he led all finance functions during a period of rapid organic and inorganic growth. Before Lookout, Kim served as the Head of Finance and Operations at BigPanda, a leading provider in AIOps. “This is an important time in Tessian’s growth, and I look forward to continue building on the success Tessian has already had,” said Kim. “Tessian’s compelling mission, seasoned leadership team, and their best-in-class intelligent cloud email security product, present a significant opportunity to modernize the enterprise, and I can’t wait to get started.” “Not only does Daniel share our mission of empowering people to do their best work, by intelligently protecting them on the channels they use most at work, but he also knows what it takes to lead a company through rapid growth,” said Tessian CEO Tim Sadler. “We are at an exciting phase in our company growth and trajectory, and with Daniel’s track record, he is best-equipped to help Tessian continue to scale.” — ENDS — About Tessian Tessian is a leading cloud email security platform that intelligently protects organizations against advanced threats and data loss on email, while coaching people about security threats in-the-moment. Using machine learning and behavioral data science, Tessian automatically stops threats that evade legacy Secure Email Gateways, including advanced phishing attacks, business email compromise, accidental data loss and insider threats. Tessian’s intelligent approach not only strengthens email security but also builds smarter security cultures in the modern enterprise. The company is backed by legendary investors such as March Capital, Sequoia, Accel and Balderton, and has been recognized as one of Fast Company’s Most Innovative Companies for 2022 . Press Contacts

Tessian Web Traffic

Page Views per User (PVPU)
Page Views per Million (PVPM)
Reach per Million (RPM)
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Tessian Rank

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