| Primary service | Focused cloud business emailEmail hosting with clear per-mailbox packages and local setup support. | Email plus Google collaborationGmail for business with Google's productivity ecosystem. | Email plus Microsoft productivityExchange business email with Microsoft cloud services. | Mail-focused business emailZoho Mail with email administration tools. |
| Custom-domain email | IncludedUse an address on your own business domain. | IncludedCustom business email is included. | IncludedCustom business email is included. | IncludedCustom-domain mail is available with paid plans. |
| Mailbox storage | 1 GB to 10 GB per mailboxChoose Starter, Basic, Standard, or Business. | 30 GB pooled storage per userBusiness Starter storage is shared across Workspace services. | 50 GB Exchange mailboxBusiness Basic also includes 1 TB cloud storage per user. | 5 GB or 10 GB per userStorage depends on the selected Mail Lite option. |
| Email access | Webmail, SMTP, IMAP, and POPConfigure compatible desktop and mobile mail clients. | Gmail web and mobile accessWorks within the Gmail and Workspace environment. | Outlook web and mobile accessBusiness email is delivered through Exchange. | Web, mobile, IMAP, and POPClient access is included with applicable paid plans. |
| Outbound delivery route | Amazon SESOutgoing DianaHost cloud email is routed through Amazon SES. | Google mail infrastructureDelivery is managed within Google Workspace. | Exchange OnlineDelivery is managed within Microsoft's email platform. | Zoho Mail infrastructureDelivery is managed within Zoho Mail. |
| Productivity suite | Email-focusedNo bundled office suite; pay for the mailbox service you need. | Google productivity appsDrive, Meet, Docs, Sheets, and related tools are included. | Microsoft web and mobile appsWord, Excel, PowerPoint, Outlook, and plan-based Teams features. | Zoho mail toolsWider Zoho productivity features depend on the selected product or plan. |
| Custom package requirements | Custom package availableAsk for the number of users, storage, and sending limits your business needs. | No custom package in this planBusiness Starter uses Google's standard user and storage limits. | No custom package in this planBusiness Basic uses Microsoft's standard mailbox and user limits. | No custom package in this planMail Lite uses Zoho's standard storage and feature limits. |
| Billing and support | From BDT 99 per mailbox/monthBDT checkout and DianaHost support for Bangladesh customers. | Regional subscription pricingPrice, tax, billing term, and support route can vary. | Regional subscription pricingPrice, tax, billing term, and Teams option can vary. | Plan and region-based pricingPrice, tax, and included features can vary. |
| Best suited for | Bangladesh businesses seeking valueA professional mailbox, transparent sending limits, and local support. | Teams using Google toolsUseful when Gmail and Google collaboration are central to work. | Teams using Microsoft 365Useful when Outlook and Microsoft apps are central to work. | Teams preferring Zoho MailA mail-focused option within the Zoho ecosystem. |