The Zimbra alternative for organisations that keep email on their own servers
XgenPlus Enterprise is an on-premise email and collaboration platform from Data Xgen Technologies, Jaipur, that replaces Zimbra in government, PSU and BFSI deployments. It ships with a built-in certificate authority, archiving, litigation hold and eDiscovery, LDAP and Active Directory integration, chat, meetings and Xgen Office, and email addresses in Indian scripts. Zimbra licenses its software for partners to deploy; XgenPlus also runs as a hosted service, from the same company that builds it, from ₹21 per user a month. Security fixes come from the vendor that wrote the code, and the XgenPlus team migrates Zimbra mailboxes. References include Air India, BSNL, HAL and NIXI.
Rated 4.7/5 on Capterra (9 verified reviews). Deployed at BSNL, NIXI, HAL and RISL, see the case studies.
- Installs on your hardware or private cloud
- Certificate authority, archiving, eDiscovery, AD included
- Patched and supported by the vendor, from India
- Zimbra mailboxes migrated by the XgenPlus team
- Hosted or on-premise, both direct from XgenPlus; Zimbra licenses the software only
On-premise XgenPlus Enterprise is quoted per deployment by mailbox count.
Why Zimbra sites are looking for a way out
Six exploited vulnerabilities added to the CISA list in eleven months
Between October 2025 and August 2026, CISA added six Zimbra flaws to its Known Exploited Vulnerabilities catalogue, from CVE-2025-27915 in October 2025 to CVE-2026-73570 in August 2026. The catalogue now holds 19 Zimbra entries. Every internet-facing Zimbra server that has not been patched is exposed to the same exploits. XgenPlus issues fixes for its own code base and applies them for on-premise customers under support.
Only release 10.1 is still supported, and it is a paid licence
Zimbra has published no official open-source builds since 8.8.15, and that release left support on 31 December 2024. Release 9.0 left support on 30 June 2025 and release 10.0 on 31 December 2025. The Zextras Suite reached end of life in July 2025. What remains is a paid Network Edition licence on release 10.1, which Zimbra supports until 31 December 2027. Sites on older releases receive no fixes. XgenPlus Enterprise is one licence per mailbox with support included.
Zimbra does not run its own hosted mailboxes
Zimbra licenses Network Edition software and relies on its partner network to deploy it as cloud, hybrid or on-premise. There is no hosted plan bought directly from Zimbra. XgenPlus is both: a hosted service from ₹21 per user a month, and the same Enterprise product installed on your own servers, from one vendor.
Chat, meetings, office and a certificate authority are add-ons or absent
XgenPlus Enterprise includes chat, audio and video meetings, Xgen Office, a certificate authority with CRL and OCSP for S/MIME, archiving and eDiscovery, and mailboxes on addresses in Indian scripts. Tender evaluators tick those rows without a third-party product.
Sources: CISA Known Exploited Vulnerabilities catalogue, checked 2 October 2026 (CVE-2025-27915 added October 2025, CVE-2026-73570 added August 2026); Zimbra product lifecycle page, checked 2 October 2026; Zextras end-of-life notice, July 2025; zimbra.com licensing and partner pages, checked September 2026 (Zimbra licenses software for partners to deploy as cloud, hybrid or on-premise; it does not sell hosted mailboxes directly). XgenPlus feature list from the Enterprise edition documentation.
XgenPlus and Zimbra prices, side by side
| Plan | Per user / month | Mailbox | Notes |
|---|---|---|---|
| XGEN StarterXgenPlus | ₹21 | 2 GB | 10 MB attachments |
| XGEN Starter ProXgenPlus | ₹31 | 5 GB | 20 MB attachments |
| XGEN PremiumXgenPlus | ₹50 | 10 GB | 25 MB attachments |
| XGEN AdvanceXgenPlus | ₹85 | 30 GB | 50 MB attachments |
| XGEN Advance ProXgenPlus | ₹111 | 50 GB | 100 MB attachments |
| XGEN EnterpriseXgenPlus | ₹167 | 100 GB | 100 MB attachments |
| Zimbra Network EditionZimbra | On request | Your servers | per-mailbox annual licence, release 10.1 (supported to 31 December 2027); deployed by you or a partner |
On-premise XgenPlus Enterprise is quoted per deployment by mailbox count. Hosted XgenPlus plans are per user per month, billed annually, plus 18% GST, for offices that can use a hosted service. Every XgenPlus plan is on the pricing page.
XgenPlus and Zimbra, capability by capability
| Capability | XgenPlus | Zimbra |
|---|---|---|
| Email, contacts, calendar | ✓ | ✓ |
| Anti-spam and anti-virus | ✓ | ✓ |
| Two-factor authentication | From Starter Pro | ✓ |
| S/MIME encryption and signing | From Advance Pro | ✓ |
| Built-in certificate authority with CRL and OCSP | Enterprise, on-premise edition | ✗ |
| Archiving, litigation hold, eDiscovery | Enterprise, on-premise edition | Network Edition |
| LDAP and Active Directory | Enterprise, on-premise edition | ✓ |
| Chat | From Starter Pro | Add-on |
| Audio and video meetings | From Premium | Add-on |
| Docs, sheets, slides | Xgen Office online, from Starter Pro | ✗ |
| AI reply and compose | From Starter Pro | ✗ |
| Email addresses in Indian scripts (IDN) | ✓ | ✗ |
| HR and payroll integration | Enterprise, on request | ✗ |
| Vendor patches applied by the vendor for on-premise customers | ✓ | Customer applies patches |
| Hosted service sold directly by the vendor | ✓ | ✗ |
| Built and supported from India | ✓ | ✗ |
XgenPlus plan availability as on the pricing page. Zimbra capabilities as published by the provider on the dates in the sources above; check its current plans before you decide.
Retiring a Zimbra deployment without a mail outage
- We audit the Zimbra installation: domains, mailbox sizes, distribution lists, LDAP or AD, archiving rules and the client mix.
- XgenPlus Enterprise is installed on your hardware or private cloud, and mailboxes are migrated in batches from Zimbra using its export tools and IMAP while Zimbra stays live.
- MX records switch to the XgenPlus hosts on the agreed evening. Users sign in with the same address, and the Zimbra hosts are shut down after your sign-off.
Migration is part of every on-premise Enterprise deployment and is done by the XgenPlus team.
Zimbra alternative: what people ask
Can XgenPlus be installed on our own servers?
Yes. XgenPlus Enterprise is deployed on your hardware or private cloud, with your storage, backups and access controls. A hosted edition exists for offices that prefer it.
Do you migrate Zimbra mailboxes?
Yes. Mail, folders, contacts and calendars are migrated in batches with Zimbra still running, and the switch is scheduled with your team.
Does it integrate with Active Directory?
Yes. LDAP and Active Directory are supported for authentication and the global address book.
We answer tenders. What can XgenPlus show?
Made in India origin from Data Xgen Technologies, Jaipur; on-premise deployment; a built-in certificate authority and S/MIME; archiving and eDiscovery; email addresses in Indian scripts; and existing government and PSU references. Ask for the bid pack.
Who applies security patches?
For on-premise customers under support, the XgenPlus team applies fixes to your deployment. Zimbra sites apply their own patches, which is where most exploited installations fall behind.
Does Zimbra offer a hosted email service directly?
No. Zimbra licenses its software to a partner network that deploys it as cloud, hybrid or on-premise; there is no hosted plan sold directly by Zimbra. XgenPlus offers both a hosted service and the on-premise edition from one vendor.
Is there a hosted option for smaller offices?
Yes. Hosted XgenPlus starts at ₹21 per user a month in Indian data centres, with the same admin experience.
Tell us about your Zimbra setup
A short note is enough. Someone from the XgenPlus team replies within one working day with a price for your team and a migration plan.
