Tessian was founded by Tim Sadler, Edward Bishop.

Who are Tessian's investors?

Tessian's investors include Accel, Balderton Capital, Crane Venture Partners, CyLon Ventures, ForgePoint Capital, LocalGlobe, March Capital Partners, Sozo Ventures and 9 more.

How much funding has Tessian raised?

Tessian has disclosed $65M raised across 1 of its 2 known rounds.

Tessian

19 known investors

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Tessian provides AI-powered email security solutions that detect and prevent email-based cyberattacks and data loss for enterprises. The platform combines behavioral detection technology with data loss prevention capabilities to protect organizations against threats targeting the human layer of security.

AI & Machine Learning Cybersecurity Enterprise Software

Founders & leadership

Tim Sadler Co-founder & CEO (Acquired by Proofpoint, Dec 2023)2012–2024Tim Sadler co-founded and served as CEO of Tessian, an AI-powered email security platform for enterprises that was acquired by Proofpoint in December 2023. He has invested in multiple early-stage technology companies across the US and Europe.

Edward BishopCo-founder & CTO (Acquired by Proofpoint)2012–2024

Ed BishopFounder

Thomas AdamsFounder

Tom AdamsFounder

Investors · 19

Accellisted by AccelPalo Alto · $500K – $100M

How we know: funding news · techcrunch.com · open dataset · 5k.vc investor directory · Not right? Tell us

Balderton Capitallisted by Balderton CapitalLondon · $5M – $50M

How we know: funding news · techcrunch.com · open dataset · 5k.vc investor directory · Not right? Tell us

Crane Venture Partnerslisted by Crane Venture PartnersLondon · $750K – $3M

How we know: Crane Venture Partners's portfolio page · techcrunch.com · the VCSheet dataset · Not right? Tell us

CyLon Ventureslisted by CyLon VenturesWitney

How we know: CyLon Ventures's portfolio page · open dataset · 5k.vc investor directory · Not right? Tell us

ForgePoint Capitallisted by ForgePoint CapitalSan Mateo · $5M – $50M

How we know: ForgePoint Capital's portfolio page · the VCSheet dataset · open dataset · 5k.vc investor directory · Not right? Tell us

LocalGlobelisted by LocalGlobeLondon

How we know: a partner's Signal profile · techcrunch.com · phoenixcourt.vc · open dataset · 5k.vc investor directory · Not right? Tell us

March Capital Partnerslisted by March Capital PartnersSanta Monica

How we know: March Capital Partners's portfolio page · a partner's Signal profile · the VCSheet dataset · Not right? Tell us

Sozo Ventureslisted by Sozo VenturesRedwood City

How we know: funding news · Not right? Tell us

TempoCaplisted by TempoCapLondon

How we know: TempoCap's portfolio page · open dataset · 5k.vc investor directory · Not right? Tell us

Thomas Jameslisted by Thomas James

How we know: Thomas James's portfolio page · Not right? Tell us

Walking Ventureslisted by Walking VenturesLondon · $500K – $1M

How we know: Walking Ventures's portfolio page · techcrunch.com · Not right? Tell us

Amadeus Capital PartnersreportedLondon · $50K – $12.7M

How we know: techcrunch.com · Not right? Tell us

Blossom CapitalreportedLondon

How we know: funding news · Not right? Tell us

Citi VenturesreportedNew York

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Latitudereported$1M – $5M

How we know: securityweek.com · Not right? Tell us

Sequoia CapitalreportedMenlo Park · $100K – $50M

How we know: company funding news (hacker news) · securityweek.com · Not right? Tell us

Winton VenturesreportedLondon

How we know: techcrunch.com · Not right? Tell us

Also in the syndicate · 2

March CapitalleadSchroder Adveq

Funding

SEC filings, press & company announcements

$65M disclosed across 1 of 2 rounds · 2018–2021

$65MSeries CMay 2021 · 2 sources
March Capital (lead), Accel, Balderton Capital, Latitude, Schroder Adveq, Sequoia Capital
Source ↗
Undisclosed amountSeries AJun 2018
Balderton Capital (lead), Accel, Amadeus Capital Partners, Crane, LocalGlobe, Walking Ventures, Winton Ventures
Source ↗

Source: company announcements and press reports — follow each round's link for the claim.

Founder mafia

The Tessian mafia →

10 people who came through Tessian went on to found or lead other companies.

Paul Sanglé-FerrièreAssociate Product ManagerFounded Workflow +1 Ramin SayarMember Board Of DirectorsFounded Sumo Logic Scott SageSeed InvestorFounded Crane Chris MansfieldGTM & ProductFounded GoodCourse Merlin KafkaProduct Manager (Enterprise AI)Founded Rex Ben FreemanSVP, International GrowthFounded Omnea Piotr DabkowskiSoftware EngineerFounded ElevenLabs Sam CoxArchitectFounded Tracebit Andy SmithHead of EngineeringFounded Tracebit Tarkeshwar ThakurSenior Engineering ManagerFounded Drivetrain

Related companies · 7

illusive networksProofpoint offers a suite of enterprise security and compliance products that protect people, email, cloud apps, and data from human-centric cyber threats using machine learning and AI. Its tools also cover data loss prevention, communications archiving, e-discovery, compliance supervision, identity threat detection, and security awareness training.

Check Point SoftwareCheck Point Software Technologies is a cybersecurity company providing security products and solutions. This page is its investor relations section, containing annual reports, SEC filings, financial results, and corporate governance information.

StatusGatorStatusGator monitors cloud services, hosted applications, and websites and aggregates their statuses into a single, customizable status page for IT and helpdesk teams. It alerts teams to outages and lets them communicate incidents to employees and clients to reduce support tickets, with integrations for tools like Slack, Microsoft Teams, and PagerDuty.

BitglassForcepoint provides a data security platform that discovers, classifies, and protects sensitive data across cloud, web, endpoint, email, and network environments. It focuses on governing AI usage—including LLMs, copilots, and AI agents—to prevent data loss, manage shadow AI, and support compliance for enterprise security teams.

ProofProof provides online notarization and identity verification tools to establish trust for agreements and records executed remotely. It serves businesses and consumers across all 50 U.S. states with digital notarization products.

AxoniusCybersecurity asset management platform providing visibility and automated policy validation.

StatusPageStatuspage provides incident communication software that enables companies to notify users and employees about service status and incidents in real time. The platform integrates with monitoring, alerting, and help desk tools to support incident response workflows across DevOps, support, and marketing teams.

Companies working in the same space as Tessian.

In the news

Email security startup Tessian raises $13M led by Balderton and Accel | TechCrunchtechcrunch.com · Jun 2018

Frequently asked questions

What does Tessian do?: Tessian provides AI-powered email security solutions that detect and prevent email-based cyberattacks and data loss for enterprises. The platform combines behavioral detection technology with data loss prevention capabilities to protect organizations against threats targeting the human layer of security.
Who founded Tessian?: Tessian was founded by Tim Sadler, Edward Bishop.
Who are Tessian's investors?: Tessian's investors include Accel, Balderton Capital, Crane Venture Partners, CyLon Ventures, ForgePoint Capital, LocalGlobe, March Capital Partners, Sozo Ventures and 9 more.
How much funding has Tessian raised?: Tessian has disclosed $65M raised across 1 of its 2 known rounds.