21CN Mail vs Zoho Mail

21CN Mail has no write-up on Specifiction yet; its figures are above.

Zoho Mail provides custom-domain email hosting for businesses, with access through web, desktop and mobile apps. The free plan supports one domain and up to five users, each with 5 GB of mail storage; it excludes IMAP, POP and Active Sync. Paid plans start at $1/user/mo when billed annually, and a 15-day trial is listed. Security features include TLS, S/MIME and AES-256 encryption at rest, while administrative controls include role-based access, custom security policies, audit logs and eDiscovery. The service lists spam and phishing blockers, and Zia can draft replies and summarize long email threads. Zoho Mail MCP connects the service to AI apps. A migration tool can transfer emails, contacts and calendars from Google Workspace, Microsoft 365 or IMAP providers. Mobile apps combine email, calendar, contacts and files. Zoho says the service is GDPR compliant and has ISO/IEC 27001 and SOC 2 Type II certifications. Paid plans include 24×7 support by email, phone and live chat; the pricing comparison lists a 99.9% uptime guarantee for its plans.