Hornetsecurity GmbH
🏢 Enterprise (1K+)
A leading global provider of next-generation cloud-based security, compliance, backup, and security awareness solutions, now a Proofpoint company. Hornetsecurity's flagship product, 365 Total Protection, is the most comprehensive cloud security suite for Microsoft 365, serving 125,000+ customers across 120+ countries through 12,000+ MSP and channel partners. The company processes 72 billion emails annually and operates 11 redundant secured data centers worldwide.
We empower companies and organizations of all sizes to focus on their core business by protecting their email communications, securing data, and ensuring business continuity and compliance with next-generation cloud-based solutions.
📍 Offices
Am Listholze 78, 30177 Hannover, Germany55 Baker Street, London W1U 7EU, UKThe Landmark Office Space, Green Park, 450 Brook Dr, Reading RG2 6UU, UKEquinox South, Great Park Rd, Bradley Stoke, Bristol BS32 4QL, UK6425 Living Place, Suite 200, Pittsburgh, PA 15206, USA5425 Wisconsin at the Collection, Suite 705, Chevy Chase, MD 20815, USA101 Marcel-Laurin Blvd., Suite 330, St-Laurent, QC H4N 2M3, CanadaSuite 500, Park Place Building, 666 Burrard Street, Vancouver, BC V6E 3P3, CanadaVía de las Dos Castillas 33, 3ºD, 28224 Pozuelo de Alarcón, Madrid, SpainCalle Casp 33 1° 2°, 08010 Barcelona, Spain2bis avenue Antoine Pinay, 59510 Hem, FranceBlock LS3, Level 1, Malta Life Sciences Park, San Gwann SGN 3000, MaltaAkasaka 2-chome Building 2F, 2-12-7 Akasaka, Minato-Ku, Tokyo, JapanStr. Vasil Gjorgov, Skopje, North Macedonia
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Part of: Proofpoint, Inc.(Wholly-owned subsidiary of Proofpoint (Thoma Bravo portfolio))About the Company
Acquired (Proofpoint / Thoma Bravo)
Stage
~$50.1M disclosed funding pre-acquisition; acquired by Proofpoint for $1.8 billion (December 2025)
Funding
📍 HQ: Am Listholze 78, 30177 Hannover, Germany
📈 Leading European cloud email security provider for MSPs and SMBs; Gartner Magic Quadrant Niche Player; Frost & Sullivan EMEA Company of the Year
Legal: Hornetsecurity GmbH · Valuation: $1.8 billion (acquisition price, December 2025) · Share Capital: €50,000
Reg: HRB 201937 (Amtsgericht Hannover)
Managing Directors: Daniel Hofmann (CEO / Founder; now EVP & GM, MSP Platform at Proofpoint), Daniel Blank (COO; now SVP, Global MSP Sales at Proofpoint)
💰 Funding & Investors
Growth Equity (PE)Jul 2020
Acquisition$1.8 billionDec 2025
Key Investors
Proofpoint / Thoma Bravo (acquirer, 2025)TA Associates (growth PE, 2022–2025)PSG Equity (growth equity, 2020–2025)Verdane (European growth equity, 2016–2025)High-Tech Gründerfonds (seed, 2007–2020)Neuhaus Partners (early VC)HCS Beteiligungsgesellschaft (2017–2020)
🤝 Notable Clients
BMW GroupFC Bayern MunichSwisscomTelefónicaKonica MinoltaLVM VersicherungDEKRACLAASConcordia
Glassdoor Rating
3.6 / 5.0(76 reviews)· 64% would recommend Tech Stack
C#.NET CoreHaskellPythonPerlRubyAngularJavaScriptTypeScriptHTMLCSSSeleniumWeb SocketsRESTful APIsSQLNoSQLVarnishHTTP/3SalesforceZendeskActiveCampaignAgile SCRUMMicrosoft 365 Graph APIAzure AD
🛠️ Engineering & Work Culture
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Engineering Culture
Agile SCRUM development with cross-functional teams. ~450 employees in R&D and partner support. Primary tech stack: C#/.NET Core, Haskell, Python. Active GitHub presence with 6 public repositories including Haskell coding guidelines. Focus on AI-powered threat detection with patented Spear Phishing Engine and NLP research.
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Remote Work Policy
2 days work from home, 3 days in office per week; flexible working hours; 2 months/year option to work from any company office location abroad
🎯 Interview Process
Difficulty:Average (2.9/5 on Glassdoor)
Duration:~29 days average; 3–4 rounds (HR → Technical → Senior leadership → Culture fit); up to 60 days for senior engineering roles
Benefits
Permanent contracts only – no fixed-term employmentFree books policy – request any professional book at no costDemand-oriented training with annual 'Hornet Boost' development meetingFlexible working hours and 2-day home office$500/year fitness reimbursement (gym, yoga, swimming)2 months/year working abroad from any company office locationFree fruit, tea, and coffee; regular pizza meetingsTeam events: after-work drinks, laser tag, escape rooms, LAN partiesComprehensive onboarding: boot camp, mentoring, dedicated Training & Education teamDaily lunch meal cardTuition refund
⭐ Employee Ratings
Environmental Awareness7.0 🏆 Awards
Frost & Sullivan 2024 EMEA Company of the Year – Cloud-Based Email SecurityFrost & Sullivan 2025 EMEA Human Risk Management Company of the YearGartner Magic Quadrant 2024–2025 – Niche Player for Email Security PlatformsRadicati Email Security Market Quadrant 2025 – Top PlayerTechConsult PUR Award – Champion among SaaS Backup providersCybersecurity Excellence Award – Most Innovative Cybersecurity CompanyCorporate Vision Global Business Awards 2024 – WinnerKununu TOP COMPANY & OPEN COMPANY badges
📊 Business Info
Key PartnershipsProofpoint (parent company since December 2025)Microsoft (deep M365 integration)Amazon Web Services (SES Mail Manager add-on)Konica Minolta (channel partner)12,000+ MSP and channel partners worldwide
AcquisitionsSpamina (Spain, January 2019) – cloud email securityEveryCloud Technologies (UK, 2020) – market partnerAltaro (Malta, 2021) – backup solutions, 50,000 customersZerospam (Canada, 2021) – email securityIT-Seal (Germany, May 2022) – security awareness trainingVade (France, March 2024) – email security, 2.5B+ messages/dayAltospam (France, April 2025) – email security
CompetitorsMimecastBarracuda NetworksMicrosoft Defender for Office 365Check Point Harmony EmailTrend MicroAbnormal AIKnowBe4SophosAcronisTitanHQ SpamTitanCloudflare Email SecurityFortinet FortiMail