Vivaldi Mail Alternatives

Best for: Open-source desktop and Android mail client for multiple accounts.

Thunderbird is a free open-source email, calendar, contacts, newsfeed, and chat client for users who want to manage existing email accounts outside a browser. It is not an email provider, but it is a strong replacement for the mail-client side of Vivaldi Mail, especially because modern Thunderbird includes OpenPGP support.

Pricing: Free software supported by user contributions and the Thunderbird project ecosystem.

Best for: Encrypted personal and business email with web and mobile apps.

Proton Mail is a privacy-focused email provider with free and paid plans, encrypted mail, aliases on paid tiers, mobile apps, web access, and Bridge support for desktop clients on eligible paid plans. It is a stronger fit than Vivaldi Mail when the priority is a standalone encrypted email account rather than a Vivaldi community mailbox.

Pricing: Free plan available; paid plans add storage, aliases, domains, and advanced features.

Best for: End-to-end encrypted email and calendar across devices.

Tuta Mail is the renamed Tutanota secure email service. It focuses on end-to-end encrypted email and calendar, with open-source clients for web, desktop, and mobile. It suits users who want a dedicated privacy-first mailbox, but those who depend on standard IMAP access should verify Tuta’s protocol model before switching.

Pricing: Free and paid plans are available; paid plans add domains, aliases, and business features.

Best for: Self-hosted personal webmail client with privacy-oriented design.

Mailpile is an open-source email client and personal webmail server designed to run on the user’s own computer. It is more technical than Vivaldi Mail and is not a simple hosted email account. Because the official site says the project is being rewritten, editors should treat it as a niche self-hosted or experimental option.

Pricing: Free open-source software; hosting, setup, and maintenance are the user’s responsibility.

Best for: Business email hosting with admin controls and Zoho suite integration.

Zoho Mail is a hosted email and calendar service aimed at businesses, teams, and custom-domain users. It offers webmail, mobile apps, desktop options, migration tools, admin controls, and integration with the wider Zoho suite. It is a practical alternative when Vivaldi Mail feels too personal or community-oriented for business use.

Pricing: Free availability varies by region and plan; paid business plans are listed officially.

Best for: Legacy OpenPGP add-on for older Thunderbird setups.

Enigmail was a Thunderbird add-on for OpenPGP email encryption, but it is no longer needed for modern Thunderbird because OpenPGP support was integrated into Thunderbird itself. It should be treated as a historical migration tool, not a current Vivaldi Mail alternative or a hosted email service.

Pricing: Free legacy add-on; current users should review Thunderbird’s built-in OpenPGP support.

Best for: Invite-based privacy-oriented email with webmail and IMAP access.

Riseup provides privacy-oriented email services with webmail and IMAP access, but account creation is invite-based and the service is aimed at communities with specific privacy and activist needs. It can be relevant for users who value independent infrastructure, but it is not a frictionless replacement for a general-purpose Vivaldi.net mailbox.

Pricing: Donation-supported service; account access generally requires an invite code.

Best for: Paid private email hosting with calendar, contacts, and custom domains.

Fastmail is a paid email, calendar, and contacts service for individuals, families, and businesses. It emphasizes speed, custom domains, aliases, standards-based access, and polished apps rather than built-in end-to-end encryption. It is a strong alternative for users who want a reliable independent email host with straightforward productivity features.

Pricing: Paid subscription service with a free trial; check current plan limits on Fastmail’s pricing page.

Best for: Low-cost privacy-focused email with calendar and contacts.

Posteo is a Berlin-based paid email provider focused on privacy, sustainability, ad-free mail, calendar, and contacts. It is best for users who want a simple privacy-minded mailbox with standard email-client compatibility. It is less suitable if custom domains, native mobile apps, or broad business administration are required.

Pricing: Widely listed as a low-cost paid service; verify current official pricing before publication.

Best for: OpenPGP encryption extension for webmail users.

Mailvelope is not an email provider. It is an OpenPGP browser extension that can add encryption workflows to webmail services such as Gmail, Outlook, and other supported providers. It can complement Vivaldi Mail or another inbox, but it should be categorized as an encryption add-on rather than a direct mailbox replacement.

Pricing: Free for private users; business and provider integrations may have separate terms.

Best for: Former private email service currently in transition.

MsgSafe.io should not be presented as an active Vivaldi Mail alternative without manual review. Its official website announces that new signups are no longer possible and that users would lose access to the web app after February 29, 2024 during a transition. Keep it only as a historical listing unless the service relaunches with verified access.

Pricing: Do not list current pricing unless the service relaunches and publishes new terms.

Best for: Secure paid email and digital workspace with groupware features.

mailbox.org is a German paid email and digital workspace provider with mail, calendar, address book, cloud storage, office tools, and meeting features depending on plan. It is a better fit than Vivaldi Mail for users who want a privacy-conscious suite with custom-domain support and more groupware features.

Pricing: Paid plans are listed officially; features vary by Light, Standard, Premium, and business tiers.

Best for: Niche email hosting service with unusual branding.

Cock.li is a niche email hosting service with webmail, but it is not a good default recommendation for a mainstream software alternatives page. The brand name, informal tone, as-is terms, and reliability or reputation concerns make it risky for AdSense-safe editorial use. Editors should review whether to remove or de-emphasize it.

Pricing: Appears free or donation-supported; verify current signup and service limits manually.

Best for: Private paid email hosting with custom-domain focus.

Soverin is a Netherlands-based paid email service built around private mailbox hosting, custom domains, and standard email apps. It is relevant for users who want a dedicated email provider rather than a community webmail account. It appears app-independent, so users should connect it through webmail or their preferred mail client.

Pricing: Official pricing lists an annual subscription model; verify mailbox and domain costs.

Best for: Private email with aliases, PGP support, and paid plans.

StartMail is a private email provider from the Startpage ecosystem, with password-protected email, PGP support, aliases, migration tools, and personal or business account types. It is a clearer modern alternative than legacy encryption add-ons when users want a hosted private mailbox with disposable-address workflows.

Pricing: Paid personal and business plans are listed officially, with trial availability shown on pricing pages.

Best for: Developer-oriented self-hosted Proton client backend experiment.

NeutronMail appears to refer to Neutron, a self-hosted server project intended to let the Proton Mail client work with other backends. It is not a hosted email provider and should not be described as a polished Proton Mail clone for general users. Treat it as a developer project requiring careful review before listing.

Pricing: Open-source project; infrastructure and maintenance costs are not included.

Best for: Secure webmail and productivity suite with OpenPGP support.

Mailfence is a Belgium-based secure email and collaboration suite with email, calendar, contacts, documents, and OpenPGP-oriented encryption features. It is relevant for Vivaldi Mail users who want a hosted private mailbox with team-friendly tools and mobile access rather than a browser-community account.

Pricing: Free and paid plans are available; verify storage, alias, and business limits on the pricing page.

Best for: Independent paid email hosting with aliases and custom domains.

Runbox is a Norway-based paid email provider with webmail, custom-domain support, aliases, calendar, contacts, file storage, and standard mail-client access. It can work well for users who want independent email hosting with open standards instead of a Vivaldi.net community mailbox.

Pricing: Paid plans and trials are listed officially; pricing varies by storage and subscription length.

Best for: Mainstream webmail and business email with Google productivity tools.

Gmail is a mainstream webmail service, while Google Workspace adds custom-domain business email and collaboration tools. It is less privacy-focused than Vivaldi.net alternatives such as Proton or Tuta, but it is relevant for users who prioritize deliverability, mobile apps, productivity integration, and admin controls.

Pricing: Consumer Gmail is free; Google Workspace business plans are paid and should be checked by region.

Best for: Email and calendar for personal Microsoft accounts and Microsoft 365 businesses.

Microsoft Outlook combines email and calendar across web, mobile, and Microsoft 365 plans. It is a useful alternative for users who already live in the Microsoft ecosystem or need business email, Office apps, shared calendars, and administration features rather than a lightweight community mailbox.

Pricing: Free Outlook accounts are available; Microsoft 365 plans add storage, apps, and business features.