Kopano
Business Email Hosting
Open-source collaboration and email platform for on-premise deployment in Europe.
Free trialDocument CollaborationEmail Management
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Fastmail
Business Email Hosting
Independent email hosting service with custom domains, fast search, calendar, and contacts focused on privacy and speed without ads.
Offline email accessPrice$3+ / seat / month
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Axigen
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Business email and collaboration platform with on-premise and cloud deployment options.
Mail server hosting and deliveryEmail security and threat protectionCalendaring and groupware featuresPrice$38.33+ / month
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ISPConfig
Cloud Hosting
Open-source multi-server hosting control panel for managing web, email, DNS, and FTP services with reseller support.
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Mailfence
Email Security
Belgian secure email with OpenPGP encryption, calendar, contacts, and documents.
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Thunderbird
Email Management
Free open-source email client by Mozilla with tabbed interface, smart folders, add-on ecosystem, and built-in calendar and chat features.
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Titan Email
Business Email Hosting
Professional business email provider offering modern email hosting for small businesses.
Email VerificationEmail Security - 8Email Management
eM Client
Email Management
Full-featured desktop email client with calendar, contacts, tasks, and chat supporting all major email providers with a clean interface.
Calendar synchronization and managementAI powered email featuresMessage encryption and securityPrice$3.33+ / month
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Zammad
Help & Customer Support
Zammad is an open-source web-based helpdesk and ticketing system that manages customer communication across email, chat, phone, and social media channels.
Free trialISO 27001GDPRTiered plansSingle Sign-OnSocial Media Management - 10Document Collaboration
Libre Office Writer Online
Document Collaboration
Open source word processor with online collaboration through Collabora Online integration.
Free planImport Export Documentation
