Tessian
15 known investors
Find your way into Tessian
19 people in our graph share verified history with the Tessian team — schools, employers, funds. One of them is your warm intro.
Jamie Montgomeryunlockedknows Tim Sadler · together at Tessian (overlapped)
×11knows the team · via Tessian
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.
Founders & leadership
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Tim SadlerinCo-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.
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Edward BishopinCo-founder & CTO (Acquired by Proofpoint)2012–2024
Investors · 15
AccelPalo Alto · $1.6M – $70M
Balderton CapitalLondon · $5M – $50M
CyLon VenturesWitney
ForgePoint CapitalSan Mateo · $5M – $50M
FraserBerlin
March Capital PartnersSanta Monica
Sozo VenturesRedwood City
TempoCapLondon
Walking VenturesLondon · $650K – $1.3M
Blossom CapitalreportedLondon
Crane Venture PartnersreportedLondon · $750K – $3M
Sequoia Capitalreported · 2 sourcesMenlo Park · $4.4M – $214M
Also in the syndicate · 3
LatitudeMarch CapitalleadSchroder Adveq
Funding
SEC filings, press & company announcements$65M disclosed across 1 round · 2021
- $65MSeries CMay 2021 · 2 sources
March Capital (lead), Accel, Balderton Capital, Latitude, Schroder Adveq, Sequoia Capital
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 +1Piotr DabkowskiSoftware EngineerFounded Eleven Labs +1Ramin SayarMember Board Of DirectorsFounded Sumo LogicScott SageSeed InvestorFounded CraneChris MansfieldGTM & ProductFounded GoodCourseMerlin KafkaProduct Manager (Enterprise AI)Founded RexBen FreemanBusiness DevelopmentFounded Omnea list viewSam CoxArchitectFounded TracebitAndy SmithHead of EngineeringFounded TracebitTarkeshwar ThakurSenior Engineering ManagerFounded Drivetrain
Competitors · 6
by search overlapillusive networks18 shared keywordsProofpoint 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 Software10 shared keywordsCheck 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.
StatusGator9 shared keywordsStatusGator 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.
Bitglass8 shared keywordsForcepoint 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.
Proof7 shared keywordsProof 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.
StatusPage5 shared keywordsStatuspage 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 competing with Tessian for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
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, CyLon Ventures, ForgePoint Capital, Fraser, March Capital Partners, Sozo Ventures, TempoCap and 4 more.
- How much funding has Tessian raised?
- Tessian has disclosed $65M raised across 1 round.