Insights

Strong Market Position Tessian's recognition as a Strong Performer in the Forrester Wave and its recent acquisition by Proofpoint highlight its competitive edge and increasing market influence in the email security sector, making it a prime candidate for expanding security integrations.

Innovation Focus The launch of Tessian Respond and the M365 Add-in showcase their commitment to innovative, proactive security solutions that cater to modern enterprises seeking advanced threat response capabilities and seamless cloud integrations.

Growth Potential With a substantial funding of over 355 million dollars and revenues estimated between 50 to 100 million dollars, Tessian demonstrates strong growth momentum suitable for upselling premium security features or expanding into enterprise-wide deployments.

Security Culture Enhancement Tessian's intelligent email security platform not only detects threats but also fosters smarter security behaviors within organizations, presenting opportunities to sell training, behavioral analytics, and culture-strengthening tools.

Strategic Partnerships Collaborations with partners like COOLSPIRiT and integration with platforms such as Microsoft 365 point to a channel-driven approach, ideal for developing joint solutions or expanding to vertical markets through reseller channels.

Tessian Tech Stack

Tessian uses 8 technology products and services including Amazon EMR, Docker, Open Graph, and more. Explore Tessian's tech stack below.

  • Amazon EMR
    Big Data Processing
  • Docker
    Containerization
  • Open Graph
    Content Management System
  • PostgreSQL
    Database
  • SQL
    Database
  • 6sense
    Marketing Automation
  • OWASP
    Security
  • Animate.css
    UI Frameworks

Media & News

Tessian's Email Address Formats

Tessian uses at least 1 format(s):
Tessian Email FormatsExamplePercentage
First.Last@tessian.comJohn.Doe@tessian.com
87%
FLast@tessian.comJDoe@tessian.com
10%
First@tessian.comJohn@tessian.com
2%
FirstLast@tessian.comJohnDoe@tessian.com
1%

Frequently Asked Questions

Where is Tessian's headquarters located?

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Tessian's main headquarters is located at 15 Worship Street, 4th Floor London, England EC2A 2DT, GB. The company has employees across 4 continents, including EuropeNorth AmericaAsia.

What is Tessian's phone number?

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You can contact Tessian's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Tessian's official website and social media links?

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Tessian's official website is tessian.com and has social profiles on LinkedInCrunchbase.

What is Tessian's NAICS code?

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Tessian's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does Tessian have currently?

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As of October 2025, Tessian has approximately 201 employees across 4 continents, including EuropeNorth AmericaAsia. Key team members include Chief Product Officer: A. L.Head Of Marketing & Communications: K. H.Head Of Communications & Content: L. B.. Explore Tessian's employee directory with LeadIQ.

What industry does Tessian belong to?

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Tessian operates in the Computer and Network Security industry.

What technology does Tessian use?

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Tessian's tech stack includes Amazon EMRDockerOpen GraphPostgreSQLSQL6senseOWASPAnimate.css.

What is Tessian's email format?

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Tessian's email format typically follows the pattern of First.Last@tessian.com. Find more Tessian email formats with LeadIQ.

How much funding has Tessian raised to date?

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As of October 2025, Tessian has raised $355M in funding. The last funding round occurred on May 01, 2021 for $65M.

When was Tessian founded?

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Tessian was founded in 2013.
Tessian

Tessian

Computer and Network SecurityUnited Kingdom201-500 Employees

Tessian was acquired by Proofpoint. View the press release: https://www.proofpoint.com/us/newsroom/press-releases/proofpoint-closes-acquisition-tessian.

To see what’s new, visit https://www.linkedin.com/company/proofpoint/.

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. 

Founded in 2013, Tessian 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.

Request a demo here: https://www.tessian.com/book-demo/

Section iconCompany Overview

Headquarters
15 Worship Street, 4th Floor London, England EC2A 2DT, GB
Phone number
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2013
Employees
201-500

Section iconFunding & Financials

  • $355M

    Tessian has raised a total of $355M of funding over 7 rounds. Their latest funding round was raised on May 01, 2021 in the amount of $65Mas a funding.

  • $50M$100M

    Tessian's revenue is estimated to be in the range of $50M$100M

Section iconFunding & Financials

  • $355M

    Tessian has raised a total of $355M of funding over 7 rounds. Their latest funding round was raised on May 01, 2021 in the amount of $65Mas a funding.

  • $50M$100M

    Tessian's revenue is estimated to be in the range of $50M$100M

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