Compare Hermes SEG vs. Mercury Mail Transport System

FusionAuth is the authentication and authorization platform engineered for developers who demand flexibility and control. Built from the ground up to integrate with any stack, every feature — from user registration to MFA and SSO — is exposed via a modern, well-documented API. Support for every major identity protocol is included out of the box: OIDC, SAML, OAuth2, JWT, passwordless login, social sign-on, and more. Whether you’re building a greenfield app or retrofitting auth into a legacy system, FusionAuth adapts to your use case — not the other way around. Need compliance? FusionAuth helps you meet GDPR, HIPAA, and COPPA standards quickly and reliably. Deploy it your way: install on Linux, Windows, macOS, Docker, or Kubernetes — or go with FusionAuth Cloud, our managed SaaS hosting. No black boxes. No vendor lock-in. Just powerful, customizable auth that works the way you do.

Proton Pass for Business is a privacy-first password and identity manager that helps organizations secure access at scale without sacrificing usability. Built with end-to-end encryption and a strict zero-knowledge architecture, it ensures that passwords, passkeys, secure notes, and payment details remain accessible only to authorized users within your team. Not even Proton can view your data. Teams can securely create, store, and share credentials via encrypted vaults, enabling safe and efficient collaboration. Granular admin controls allow IT managers to oversee permissions, enforce strong password policies, monitor access, and manage users throughout the employee lifecycle from onboarding to offboarding. Built-in password generation, autofill, and cross-device syncing streamline everyday workflows while maintaining high security standards. Proton Pass for Business also includes advanced features such as email alias integration to protect employee identities, dark web monitoring to detect compromised credentials, and detailed activity logs for visibility and compliance. Its open-source foundation promotes transparency and trust, and independent audits reinforce its security model. Hosted in Switzerland and protected by strong privacy laws, Proton Pass offers organizations a secure alternative to traditional password managers. With seamless browser extensions, an intuitive design, and enterprise-ready controls, it empowers teams to reduce credential-related risks, prevent unauthorized access, and improve productivity, all within a secure, encrypted environment.

Reliable cloud-based email hosting includes features such as spam filtering, antivirus protection, ample storage, and webmail access. It seamlessly integrates with Outlook as well as various other POP3/IMAP clients. For users with high sending needs, it offers a robust SMTP service designed for responsible senders. Additionally, there is an outbound relay service tailored for transactional emails, marketing campaigns, newsletters, and diverse applications. The infrastructure supports dedicated email servers, clustering, and multiple IP load balancing to accommodate high-volume senders effectively. With a fixed monthly fee, users benefit from unlimited sending capabilities and reputation monitoring. Greatmail stands out as an email service provider (ESP) focused on delivering business-class email hosting, SMTP hosting, and specialized email servers. Furthermore, for ISPs, software developers, and cloud architects, we also create custom solutions featuring dedicated IP servers and load-balanced configurations with multiple servers to meet specific processing needs. This commitment to adaptability ensures that all clients receive the best possible service, tailored to their unique requirements.

Fax.Cloud is a secure cloud fax solution built for organizations that must meet strict compliance standards. It offers encrypted, point-to-point online faxing with confirmed delivery and detailed audit trails for just 2¢ CAD per page. Fax.Cloud supports PIPEDA, HIPAA, and SOC2 requirements while avoiding common email risks like spam filtering, wrong recipients, and lost messages. Users can send and receive faxes from a web portal, email, desktop, or mobile device with no phone lines or hardware required. Teams can be set up in minutes with user permissions, notifications, and centralized document management. Local and toll-free numbers make it easy to scale as your business grows. Upgrade to secure cloud faxing today.

Secure your company’s communications with Proton Mail — the business email solution trusted by over 50,000 organizations. With end-to-end encryption built in, your internal and external communications stay confidential by default. Proton Mail helps your business meet GDPR, HIPAA, and other compliance standards, while giving you full control over your data under strong Swiss privacy laws. Empower your team with encrypted email and calendar, support for your custom email domains, professional branding, and simple migration from providers like Google Workspace or Microsoft 365 — no IT team required.

We work with you to make sure your inbox providers don't send spam emails to your email. In just a matter of weeks, our clients have seen their open rates increase by more than DOUBLE! High-engagement recipients open emails and scroll down as they read. This should be done for almost all emails that are opened, as long as the content is not longer than the page. If a recipient takes an email from spam and goes out of their way, it is telling the inbox provider that they made a mistake. Inbox providers will be able to tell if you move an email from the promotions folder into the primary inbox that you don't agree with their sorting criteria. It and other similar emails should go directly to the primary mailbox. It shows that the recipient is interested in your email content. The inbox provider can interpret this as "This email is extremely important, please do not send it to spam."

Secure your organization from costly data breaches while meeting essential compliance requirements, such as ISO 27001, GDPR, and HIPAA. Our software-based VPN solution is easy to deploy alongside your existing systems, giving you a powerful and adaptable tool for securing your enterprise network. Our VPN Professional plan allows your team to connect securely to your local networks and cloud-based services. And with granular segmented control over who can connect to dedicated VPN servers and Gateways (logical groupings of dedicated servers), you can ensure your staff can access the resources they need (but only what they need). All of our business plans use robust industry-standard AES-256 or ChaCha20 encryption to ensure your data remains secure. You can further strengthen your organization's security with enforced two-factor authentication (2FA) and seamless login through single sign-on (SSO) with SCIM support for automated user provisioning. Our global high-performance (mainly 10 Gbps) server network is one of the largest in the world, and is part of the trusted Proton ecosystem — a suite of fully open source, end-to-end encrypted services built by the creators of Proton Mail and designed specifically to keep your business secure.

PostScan Mail is a virtual mailbox service that provides individuals and businesses with a convenient and secure way to manage their postal mail online. With PostScan Mail, users can access their physical mail from anywhere in the world through their digital devices. The service allows users to view and manage their mail, receive notifications of new mail items, forward mail to any address, scan and shred unwanted mail, and even deposit checks remotely. PostScan Mail eliminates the need for physical mailboxes and offers a practical solution for people who are always on the go or live in multiple locations. It is a modern and efficient way to manage your postal mail, making your life easier and more streamlined.

Click2Mail transforms traditional mail with its online and on demand, SaaS print to-mail service. Click2Mail gives users access to tools that make it easy to create and mail postcards, letters, and other printed materials. Individuals and organizations can use Click2Mail's easy-to-use Mailing Online Publisher to create, address, and ship mailpieces from anywhere on the globe.

ESET Protect Advanced offers a comprehensive cybersecurity solution for businesses of any size. It offers advanced endpoint security against ransomware and zero-day threats. It also includes full disk encryption to ensure legal compliance and data security. The solution uses adaptive scanning, cloud sandboxing and behavioral analysis for proactive cloud-based threats defense. Mobile threat protection secures Android and iOS with anti-malware and anti-theft. It also offers cloud app security, mail server protection, vulnerability and patch management, and cloud app protection. Multi-factor authentication and extended detection and reaction (XDR) improve threat detection and response. The solution provides a single pane of glass remote management to provide visibility into threats and users. It also offers advanced reporting and customized notifications.