Insights

Market Leadership Tessian is recognized as a strong performer in the enterprise email security space, highlighting its credibility and competitive positioning, making it a prime candidate for expansion and upsell opportunities within organizations seeking advanced threat protection.

Acquisition Momentum Being acquired by Proofpoint for $120 million indicates a strategic push into integrated cybersecurity solutions, providing opportunities to collaborate on joint offerings and target existing Proofpoint clients for Tessian’s cloud email security platform.

Product Innovation The recent launch of Tessian Respond and the M365 Add-in demonstrates ongoing innovation in threat detection and response, positioning Tessian as a go-to solution for organizations seeking proactive and automated email security enhancements.

Growth Funding With over $355 million in funding and a revenue range of $50 million to $100 million, Tessian has significant growth capital, which can be leveraged to initiate targeted sales campaigns toward mid to large enterprises expanding their cybersecurity investments.

Industry Focus Tessian's focus on cloud email security for modern enterprises aligns well with organizations undergoing digital transformation or upgrading their email and cybersecurity infrastructure, opening opportunities for cross-selling and tailored security solutions.

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 Boston, Massachusetts United States. 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 February 2026, Tessian has approximately 44 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 February 2026, 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

Computer and Network SecurityMassachusetts, United States11-50 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
Boston, Massachusetts United States
Phone number
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2013
Employees
11-50

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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