OverviewSuggest Edit

Tessian is a company that develops machine-intelligent technology. Its solution performs an automatic analysis of emails in order to keep an enterprise secure by automatically preventing misaddressed emails and other forms of data loss. It implements ethical walls and project boundaries between groups of email users as well as meets customers' client security requirements.

HQLondon, GB
Employee Ratings4.8

Latest Updates

Employees (est.) (Jan 2020)152

Key People/Management at Tessian

Tim Sadler

Tim Sadler

Co-Founder, CEO
Sabrina Castiglione

Sabrina Castiglione

Chief Financial Officer
Tom Adams

Tom Adams

Co-Founder, Head of Client-Side Engineering
Edward Bishop

Edward Bishop

Co-Founder, CTO
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Tessian Office Locations

Tessian has offices in London and New York
London, GB (HQ)
3 Finsbury Ave
New York, US
313 Park Ave S
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Tessian Financials and Metrics

Summary Metrics

Founding Date


Tessian total Funding

$58.6 m

Tessian latest funding size

$42 m

Time since last funding

a year ago

Tessian investors

Tessian's latest funding round in February 2019 was reported to be $42 m. In total, Tessian has raised $58.6 m
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Tessian Revenue

Cash (31-Mar-2019)

GBPFY, 2015FY, 2016FY, 2018FY, 2019



Accounts Receivable


Current Assets

Y, 2019

Financial Leverage

1.2 x
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Tessian Online and Social Media Presence

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Tessian News and Updates

London startup Tessian raised $42 million from Sequoia using this 1 pitch deck slide — and it's just a photo of the founders in their London flat

London startup Tessian has raised funding from some of the biggest names in VC including Accel and Sequoia.  The company's $42 million Series B earlier this year was partly successful because Sequoia Capital were impressed by Tessian's pitch deck and one slide of it in particular.  "The grit of th…

Hill Dickinson selects email DLP tool Tessian to avoid a “costly mistake”

It's another big UK win for Tessian as Hill Dickinson selects them to help prevent data loss from misdirected emails. And yes, we know that misdirected emails accounted for the most incidents reported to the ICO in 2017. Here is the release.

Tessian raises $42m led by Sequoia

Unusually described by one UK top 50 CIO we chatted with recently as a "dream product", Tessian has raised $42m in a Series B funding round led by Sequoia - famously one of the first investors in Apple - to accelerate its expansion in the US and other global markets.

DAC adopts Tessian to support new cyber strategy

DAC Beachcroft LLP has adopted Tessian’s machine learned-based email security platform to support the firm’s new cyber security strategy.

Start spreading the news: Tessian opens in New York

Spurred on by a year that has seen it raise $13m in Series A funding and revenue grow by over 500%, Tessian (formerly CheckRecipient) has opened its first outside of the UK in New York. The Park Avenue South office is headed by Ben Freeman, who has relocated from Tessian’s London office.

Tessian Frequently Asked Questions

  • When was Tessian founded?

    Tessian was founded in 2013.

  • Who are Tessian key executives?

    Tessian's key executives are Tim Sadler, Sabrina Castiglione and Tom Adams.

  • How many employees does Tessian have?

    Tessian has 152 employees.

  • Who are Tessian competitors?

    Competitors of Tessian include MyFavorito, Catalyst and LiveHive.

  • Where is Tessian headquarters?

    Tessian headquarters is located at 3 Finsbury Ave, London.

  • Where are Tessian offices?

    Tessian has offices in London and New York.

  • How many offices does Tessian have?

    Tessian has 2 offices.