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Head-to-head · Email Archiving Software

Mimecast Cloud Archive vs OpenText Retain Unified Archiving

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Mimecast Cloud Archive #3 in Email Archiving Software 9.2/10 Pricing on request ✓ 3 of 3 features Visit Mimecast
OpenText Retain Unified Archiving #6 in Email Archiving Software 9.0/10 Pricing on request ✓ 2 of 3 features Visit OpenText

Mimecast Cloud Archive leads on 0 checks, OpenText Retain Unified Archiving on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMimecast Cloud Archive · 9.2/10
  • Most featuresMimecast Cloud Archive · 3 of 3

Mimecast Cloud Archive scores higher on our rubric for email archiving software: 9.2 against 9.0 out of 10; our editors rank them #3 and #6.

Mimecast Cloud Archive is the better fit for cloud-first teams needing resilient archiving. OpenText Retain Unified Archiving is the better fit for organizations needing unified email and mobile archives.

  • Mimecast Cloud Archive fits best

    Cloud-first teams needing resilient archiving

  • OpenText Retain Unified Archiving fits best

    Organizations needing unified email and mobile archives

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Mimecast Cloud Archive 9.2/10 Visit ↗ OpenText Retain Unified Archiving 9.0/10 Visit ↗
At a glance
Editor score 9.2 9.0
Ranking #3 in Email Archiving Software #6 in Email Archiving Software
Best for Cloud-first teams needing resilient archiving Organizations needing unified email and mobile archives
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet Not checked yet
Free trial — —
Deployment Cloud Cloud, Mobile, Self-hosted
Platforms Web Web, iOS, Android
Integrations 6 integrations 7 integrations
Features Mimecast Cloud Archive 3/3 · OpenText Retain Unified Archiving 2/3
Legal hold ✓ ✓
eDiscovery tools ✓ ✓
Journal capture ✓ (best) Not checked yet
Specs
Retention period Not checked yet Not checked yet
Deployment Cloud Not checked yet
Search and export Search and export are supported; specific export formats are not documented Search archived messages; export to PST, PDF, or standalone archive viewer formats
Our review
Pros
  • Near-real-time search with eDiscovery case management
  • Legal holds, retention policies, and compliance exports
  • Triplicate storage across geographically diverse data centers
  • Archives email, mobile, and messaging communications in one system
  • Includes eDiscovery, litigation holds, audit trails, and redaction
  • Supports cloud or on-premises storage with PST and PDF exports
Cons
  • Pricing requires a sales quotation
  • Web is the listed platform
  • Teams must validate compatibility with required export formats
  • Pricing requires a conversation with OpenText sales
  • Deployment requires choosing between cloud and on-premises storage
  • Platform fit depends on the listed email and messaging integrations
Our verdict

Mimecast Cloud Archive is a cloud-based email and collaboration archiving service for organizations managing retention, compliance, legal discovery, and business continuity. It stores inbound, outbound, and internal email with metadata,…

Read the review →

OpenText Retain Unified Archiving centralizes business communications from Microsoft Exchange, Microsoft 365, Gmail, Bloomberg Professional, OpenText GroupWise, Outlook, and mobile devices. It is designed for organizations that need…

Read the review →
  1. Mimecast Cloud ArchiveEmail Archiving Software 9.2Pricing on request
  2. OpenText Retain Unified ArchivingEmail Archiving Software 9.0Pricing on request

Strengths and trade-offs

  • Mimecast Cloud Archive — where it wins

    • Near-real-time search with eDiscovery case management
    • Legal holds, retention policies, and compliance exports
    • Triplicate storage across geographically diverse data centers

    Where it doesn't

    • Pricing requires a sales quotation
    • Web is the listed platform
    • Teams must validate compatibility with required export formats

  • OpenText Retain Unified Archiving — where it wins

    • Archives email, mobile, and messaging communications in one system
    • Includes eDiscovery, litigation holds, audit trails, and redaction
    • Supports cloud or on-premises storage with PST and PDF exports

    Where it doesn't

    • Pricing requires a conversation with OpenText sales
    • Deployment requires choosing between cloud and on-premises storage
    • Platform fit depends on the listed email and messaging integrations
  • Mimecast Cloud Archive9.2/10 · Pricing on request

    A cloud archive for policy-based retention, rapid search, legal discovery, and collaboration capture.

    Visit MimecastFull verdict →
  • OpenText Retain Unified Archiving9.0/10 · Pricing on request

    A broad communications archive for compliance, investigations, and email-system migration.

    Visit OpenTextFull verdict →

More comparisons

All email archiving software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update