# DigiCert Secure Email (S/MIME) Certs alternatives and competitors (2026) The closest DigiCert Secure Email (S/MIME) Certs alternatives are [Z1 SecureMail Gateway](https://cybersectools.com/tools/zertificon-z1-solutions), [LuxSci](https://cybersectools.com/tools/luxsci) and [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway). Picking a DigiCert Secure Email (S/MIME) Certs alternative comes down to fit: Email Encryption coverage, your environment, your integrations and your budget. So each option below shows what it covers, how it deploys, its pricing model and the company behind it. 39 alternatives. Closest matches: Z1 SecureMail Gateway, LuxSci, SEPPmail Secure Email Gateway. ## The product [DigiCert Secure Email (S/MIME) Certs](https://cybersectools.com/tools/digicert-secure-email-smime-certs) by DigiCert S/MIME certificates for end-to-end email encryption and signing. Category: [Email & Messaging Security](https://cybersectools.com/categories/email-security) · Pricing model: Commercial ## DigiCert Secure Email (S/MIME) Certs alternatives and competitors DigiCert Secure Email (S/MIME) Certs is a commercial [Email Encryption](https://cybersectools.com/categories/email-encryption) solution made by DigiCert. The closest matches by shared tags and NIST CSF 2.0 coverage are [Z1 SecureMail Gateway](https://cybersectools.com/tools/zertificon-z1-solutions), [LuxSci](https://cybersectools.com/tools/luxsci), [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway), [Egress Protect](https://cybersectools.com/tools/egress-protect), and [Zivver Secure Email Gateway](https://cybersectools.com/tools/zivver-secure-email-gateway). All 39 alternatives on this page are ranked the same way. ## The closest DigiCert Secure Email (S/MIME) Certs alternatives These 8 solutions overlap most with DigiCert Secure Email (S/MIME) Certs. Each one says what the product does and, when the overlap is big enough, which capabilities it shares. ### 1. [Z1 SecureMail Gateway](https://cybersectools.com/tools/zertificon-z1-solutions) Enterprise email encryption gateway supporting S/MIME, OpenPGP, and digital signing. [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: Digital email signing for authenticity and integrity, Automated certificate management via CertMagic®, Inter-organizational encrypted email exchange via GlobalCrypt®, Cloud deployment support for Azure/M365 and Google Cloud/Workspace, Centralized server-side encryption transparent to end users [Z1 SecureMail Gateway alternatives](https://cybersectools.com/alternatives/zertificon-z1-solutions) · [DigiCert Secure Email (S/MIME) Certs vs Z1 SecureMail Gateway](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-zertificon-z1-solutions) ### 2. [LuxSci](https://cybersectools.com/tools/luxsci) HIPAA-compliant email, marketing, and forms platform for healthcare orgs. [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 10 listed. See them on the [LuxSci page](https://cybersectools.com/tools/luxsci#features). [LuxSci alternatives](https://cybersectools.com/alternatives/luxsci) · [DigiCert Secure Email (S/MIME) Certs vs LuxSci](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-luxsci) ### 3. [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway) SEPPmail Secure Email Gateway is an email security product that provides encryption and digital signing for email communications. It is designed to secure email traffic for organizations by enabling encrypted and signed message exchange with external and internal recipients. The gateway integrates with existing mail infrastructure to automatically apply encryption and decryption based on defined policies, without requiring end users to install additional software or manage encryption keys manually. It supports common encryption standards to enable secure communication with business partners and customers regardless of the encryption technology they use. The product is aimed at organizations that need to comply with data protection regulations and secure sensitive information sent via email, such as financial, healthcare, or legal data. Secure email gateway providing automated email encryption and digital signing [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 6 listed. See them on the [SEPPmail Secure Email Gateway page](https://cybersectools.com/tools/seppmail-secure-email-gateway#features). [SEPPmail Secure Email Gateway alternatives](https://cybersectools.com/alternatives/seppmail-secure-email-gateway) · [DigiCert Secure Email (S/MIME) Certs vs SEPPmail Secure Email Gateway](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-seppmail-secure-email-gateway) ### 4. [Egress Protect](https://cybersectools.com/tools/egress-protect) End-to-end email encryption with DLP and access controls for Microsoft 365 [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 10 listed. See them on the [Egress Protect page](https://cybersectools.com/tools/egress-protect#features). [Egress Protect alternatives](https://cybersectools.com/alternatives/egress-protect) · [DigiCert Secure Email (S/MIME) Certs vs Egress Protect](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-egress-protect) ### 5. [Zivver Secure Email Gateway](https://cybersectools.com/tools/zivver-secure-email-gateway) Secure email gateway with automated DLP and zero-knowledge encryption [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 10 listed. See them on the [Zivver Secure Email Gateway page](https://cybersectools.com/tools/zivver-secure-email-gateway#features). [Zivver Secure Email Gateway alternatives](https://cybersectools.com/alternatives/zivver-secure-email-gateway) · [DigiCert Secure Email (S/MIME) Certs vs Zivver Secure Email Gateway](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-zivver-secure-email-gateway) ### 6. [Beyond Encryption Mailock® Secure Email](https://cybersectools.com/tools/beyond-encryption-mailockr-secure-email) Encrypted email platform with recipient verification, tracking, and revocation. [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 6 listed. See them on the [Beyond Encryption Mailock® Secure Email page](https://cybersectools.com/tools/beyond-encryption-mailockr-secure-email#features). [Beyond Encryption Mailock® Secure Email alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailockr-secure-email) · [DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock® Secure Email](https://cybersectools.com/compare/beyond-encryption-mailockr-secure-email-vs-digicert-secure-email-smime-certs) ### 7. [Beyond Encryption Mailock for Outlook](https://cybersectools.com/tools/beyond-encryption-mailock-for-outlook) Outlook add-in for end-to-end email encryption with recipient auth & revoke. [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 7 listed. See them on the [Beyond Encryption Mailock for Outlook page](https://cybersectools.com/tools/beyond-encryption-mailock-for-outlook#features). [Beyond Encryption Mailock for Outlook alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailock-for-outlook) · [DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock for Outlook](https://cybersectools.com/compare/beyond-encryption-mailock-for-outlook-vs-digicert-secure-email-smime-certs) ### 8. [Beyond Encryption Mailock Enterprise](https://cybersectools.com/tools/beyond-encryption-mailock-enterprise) Enterprise secure email gateway with AES-256 encryption & recipient auth. [Email Encryption](https://cybersectools.com/categories/email-encryption) · Commercial Key features: 8 listed. See them on the [Beyond Encryption Mailock Enterprise page](https://cybersectools.com/tools/beyond-encryption-mailock-enterprise#features). [Beyond Encryption Mailock Enterprise alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailock-enterprise) · [DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock Enterprise](https://cybersectools.com/compare/beyond-encryption-mailock-enterprise-vs-digicert-secure-email-smime-certs) ## All 39 products like DigiCert Secure Email (S/MIME) Certs The 8 above, plus: - [Beyond Encryption Mailock for M365](https://cybersectools.com/tools/beyond-encryption-mailock-for-m365): AES-256 encrypted email add-on for M365 with auth & revocation. (Commercial) - [CloudMask End-to-End Encryption](https://cybersectools.com/tools/cloudmask-end-to-end-encryption): E2EE solution for emails, files & SaaS apps with user-held encryption keys. (Commercial) - [Intermedia Email Encryption](https://cybersectools.com/tools/intermedia-email-encryption): Cloud-based email encryption service using PKI, S/MIME & X.509 for orgs. (Commercial) - [PreVeil Security](https://cybersectools.com/tools/preveil-security): End-to-end encrypted email & file sharing with zero-trust architecture. (Commercial) - [PreVeil Admin Features](https://cybersectools.com/tools/preveil-admin-features): Enterprise admin module for encrypted email & file sharing with E-discovery controls. (Commercial) - [PreVeil Email](https://cybersectools.com/tools/preveil-email): E2E encrypted email for regulated industries handling CUI and ITAR data. (Commercial) - [StealthMail](https://cybersectools.com/tools/stealthmail): Enterprise email security via encrypted stealth-links, bypassing SMTP vulnerabilities. (Commercial) - [PRIM'X ZEDMAIL](https://cybersectools.com/tools/primx-zedmail): Transparent email and attachment encryption for corporate messaging via Outlook (Commercial) - [TitanHQ EncryptTitan](https://cybersectools.com/tools/titanhq-encrypttitan): Email encryption solution for secure information exchange via email (Commercial) - [Kiteworks Secure Email](https://cybersectools.com/tools/kiteworks-secure-email): Secure email platform with encryption, DLP, and policy automation (Commercial) - [INKY Email Encryption](https://cybersectools.com/tools/inky-email-encryption): Email encryption solution for securing sensitive data in email communications (Commercial) - [Galaxkey Email Encryption Software](https://cybersectools.com/tools/galaxkey-email-encryption-software): Email encryption software using FIPS 140-2 compliant modules and RSA keys (Commercial) - [Virtru Email Encryption](https://cybersectools.com/tools/virtru-email-encryption): End-to-end email encryption for Gmail and Outlook with access controls (Commercial) - [Virtru Data Protection Gateway](https://cybersectools.com/tools/virtru-data-protection-gateway): Automated email & SaaS encryption gateway with DLP rules & access controls (Commercial) - [Seclore Email Encryption](https://cybersectools.com/tools/seclore-email-encryption): Email encryption solution with access control, tracking, and revocation (Commercial) - [RPost RMail Email Encryption](https://cybersectools.com/tools/rpost-rmail-email-encryption): Email encryption service with automated delivery and compliance tracking (Commercial) - [SecurelyShare for Email](https://cybersectools.com/tools/securelyshare-for-email): End-to-end email encryption solution with centralized policy management (Commercial) - [Beyond Encryption Mailock Automated](https://cybersectools.com/tools/beyond-encryption-mailock-automated): Automated bulk secure email encryption & delivery for enterprise orgs. (Commercial) - [CloudMask Secure Gmail](https://cybersectools.com/tools/cloudmask-secure-gmail): End-to-end Gmail encryption with user-controlled keys and trusted contacts. (Commercial) - [CloudMask E2EE for Healthcare](https://cybersectools.com/tools/cloudmask-e2ee-for-healthcare): E2E encryption for healthcare emails, files & apps protecting ePHI/PII. (Commercial) - [CloudMask E2EE for Education](https://cybersectools.com/tools/cloudmask-e2ee-for-education): E2EE solution for education covering emails, files, and apps. (Commercial) - [Echoworx Branding as a Service](https://cybersectools.com/tools/echoworx-branding-as-a-service): White-label branding layer for Echoworx's email encryption platform. (Commercial) - [SalaX Secure Mail](https://cybersectools.com/tools/salax-secure-mail): Email encryption solution for secure organizational communications. (Commercial) - [Honeycake Email](https://cybersectools.com/tools/honeycake-email): Email client plugin that encrypts file attachments into .cake format before sending. (Commercial) - [Smartlockr Secure Email for Recruiters](https://cybersectools.com/tools/smartlockr-secure-email-for-recruiters): Secure email solution for recruiters to encrypt and share sensitive candidate data (Commercial) - [Nightfall Data Encryption](https://cybersectools.com/tools/nightfall-data-encryption): AI-powered email encryption solution for compliance with HIPAA, FINRA, FERPA (Commercial) - [Virtru Gmail Encryption](https://cybersectools.com/tools/virtru-gmail-encryption): End-to-end email encryption for Gmail with granular access controls (Commercial) - [Virtru Google Workspace Encryption and Data Privacy](https://cybersectools.com/tools/virtru-google-workspace-encryption-and-data-privacy): Encryption and data privacy solution for Google Workspace applications (Commercial) - [OpenText Core Email Encryption](https://cybersectools.com/tools/opentext-core-email-encryption): Cloud-based email encryption with automated DLP policies and delivery methods (Commercial) - [Paubox Email Encryption](https://cybersectools.com/tools/paubox-email-encryption): HIPAA-compliant email encryption for Google Workspace and Microsoft 365 (Commercial) - [Green Radar grKey](https://cybersectools.com/tools/green-radar-grkey) (Commercial) ## Alternatives to each of these [Z1 SecureMail Gateway alternatives](https://cybersectools.com/alternatives/zertificon-z1-solutions) · [LuxSci alternatives](https://cybersectools.com/alternatives/luxsci) · [SEPPmail Secure Email Gateway alternatives](https://cybersectools.com/alternatives/seppmail-secure-email-gateway) · [Egress Protect alternatives](https://cybersectools.com/alternatives/egress-protect) · [Zivver Secure Email Gateway alternatives](https://cybersectools.com/alternatives/zivver-secure-email-gateway) · [Beyond Encryption Mailock® Secure Email alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailockr-secure-email) · [Beyond Encryption Mailock for Outlook alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailock-for-outlook) · [Beyond Encryption Mailock Enterprise alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailock-enterprise) · [Beyond Encryption Mailock for M365 alternatives](https://cybersectools.com/alternatives/beyond-encryption-mailock-for-m365) · [CloudMask End-to-End Encryption alternatives](https://cybersectools.com/alternatives/cloudmask-end-to-end-encryption) · [Intermedia Email Encryption alternatives](https://cybersectools.com/alternatives/intermedia-email-encryption) · [PreVeil Security alternatives](https://cybersectools.com/alternatives/preveil-security) ## Other DigiCert products [DigiCert CertCentral alternatives](https://cybersectools.com/alternatives/digicert-certcentral) · [DigiCert Device Trust Manager alternatives](https://cybersectools.com/alternatives/digicert-device-trust-manager) · [DigiCert ONE alternatives](https://cybersectools.com/alternatives/digicert-one) · [DigiCert Open Source alternatives](https://cybersectools.com/alternatives/digicert-open-source) · [DigiCert Private CA alternatives](https://cybersectools.com/alternatives/digicert-private-ca) · [DigiCert Software Trust Manager alternatives](https://cybersectools.com/alternatives/digicert-software-trust-manager) · [DigiCert TLS/SSL Certificates alternatives](https://cybersectools.com/alternatives/digicert-tlsssl-certificates) · [DigiCert Trust Lifecycle Manager alternatives](https://cybersectools.com/alternatives/digicert-trust-lifecycle-manager) ## Compare DigiCert Secure Email (S/MIME) Certs with - [DigiCert Secure Email (S/MIME) Certs vs Z1 SecureMail Gateway](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-zertificon-z1-solutions) - [DigiCert Secure Email (S/MIME) Certs vs LuxSci](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-luxsci) - [DigiCert Secure Email (S/MIME) Certs vs SEPPmail Secure Email Gateway](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-seppmail-secure-email-gateway) - [DigiCert Secure Email (S/MIME) Certs vs Egress Protect](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-egress-protect) - [DigiCert Secure Email (S/MIME) Certs vs Zivver Secure Email Gateway](https://cybersectools.com/compare/digicert-secure-email-smime-certs-vs-zivver-secure-email-gateway) - [DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock® Secure Email](https://cybersectools.com/compare/beyond-encryption-mailockr-secure-email-vs-digicert-secure-email-smime-certs) - [DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock for Outlook](https://cybersectools.com/compare/beyond-encryption-mailock-for-outlook-vs-digicert-secure-email-smime-certs) - [DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock Enterprise](https://cybersectools.com/compare/beyond-encryption-mailock-enterprise-vs-digicert-secure-email-smime-certs) ## DigiCert Secure Email (S/MIME) Certs Alternatives FAQ ### What are the closest alternatives to DigiCert Secure Email (S/MIME) Certs? The closest matches to DigiCert Secure Email (S/MIME) Certs by shared tags and NIST CSF 2.0 coverage are Z1 SecureMail Gateway, LuxSci, SEPPmail Secure Email Gateway, Egress Protect, and Zivver Secure Email Gateway. All of them are Email Encryption products. ### How many alternatives to DigiCert Secure Email (S/MIME) Certs are available? This page shows 39 alternatives to DigiCert Secure Email (S/MIME) Certs, all in the Email Encryption category. Each one is matched on shared tags and NIST CSF 2.0 areas, and the closest matches rank first. ### Is DigiCert Secure Email (S/MIME) Certs free or commercial? DigiCert Secure Email (S/MIME) Certs is a commercial Email Encryption product. It needs a paid license or subscription. Only commercial alternatives are listed here. Free and open source products are under /free. ### What type of solution is DigiCert Secure Email (S/MIME) Certs? DigiCert Secure Email (S/MIME) Certs is a Email Encryption product in the Email & Messaging Security category. You can compare it with the 39 other Email Encryption products on this page. --- Source: https://cybersectools.com/alternatives/digicert-secure-email-smime-certs For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any product or compare page has a Markdown copy too (add .md to its URL). More on DigiCert Secure Email (S/MIME) Certs and its alternatives: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=alternatives-md