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Quorum vs Zerto

Quorum and Zerto both land on Depends.

Quorum

quorum.com

Depends
Confidence: Low

Fit for organizations running critical on-prem servers that cannot tolerate downtime, often via MSPs.

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Zerto

zerto.com

Depends
Confidence: Medium

Buy if you run VMware at midsize-to-enterprise scale and need near-zero-RPO disaster recovery or ransomware resilience.

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Quorum versus Zerto
CompareQuorumZerto
VerdictDependsDepends
Best forOn-prem server shopsVMware-heavy midsize and enterprise IT
Who it's not forCloud-only startups . no servers to recoverSmall orgs . pricing called prohibitive
PrivacyOne known XSS vulnerability (CVE-2024-44449) in onQ OS v6.0; no broader public vulnerability history found in the sources reviewed.⁴No Zerto breaches found; vendor runs proactive vulnerability management and ships a pre-hardened ZVM appliance.
Support qualityNo direct support evidence foundOnly vendor marketing claims in evidence
Public sentimentUsable feedback is scarce: one G2 reviewer reports near-decade-long use and an MSP reports a long-term customer, while most online 'Quorum' reviews cover unrelated products.²Reddit admins and reviewers call Zerto the best real-time replication for DR, praising ease of use while repeatedly flagging cost.
Biggest gotchaXSS (CVE-2024-44449) disclosed in onQ OS v6.0 . confirm patch status before buying.⁴HPE price list shows $5.43M for a 2,500-VM, five-year enterprise package15

Pick Quorum when

  • On-prem server shops
  • MSP-managed IT environments
  • Teams needing automated DR testing
  • Ransomware-wary SMBs

When Quorum is not a fit

  • Cloud-only startups . no servers to recover
  • Tiny teams; cheap cloud file backup suffices
  • Enterprises needing petabyte, multi-site DR
  • Buyers demanding transparent published pricing

Pick Zerto when

  • VMware-heavy midsize and enterprise IT
  • Ransomware/DR with near-zero RPO
  • Regulated sectors: healthcare, gov, finance
  • Cloud DR to AWS/Azure

When Zerto is not a fit

  • Small orgs . pricing called prohibitive
  • Anyone who just needs simple backups
  • Homelabs and micro-budgets
  • Teams without dedicated virtualization admins

Sources

  1. Quorum . onQ disaster recovery product pagequorum.com
    official
  2. Quorum Backup & Recovery Reviews & Product Detailsg2.com
    review
  3. Anyone else use Quorum? . r/mspreddit.com
    review
  4. Cross Site Scripting vulnerability in Quorum onQ OS v6.0github.com
    security
  5. CVE-2024-44449 Detailnvd.nist.gov
    security
  6. Quorum security page (crawl: none found)quorum.com
    official
  7. Quorum case studies (Southwest Community Health Center)quorum.com
    official
  8. Quorum . Crunchbase Company Profile & Fundingcrunchbase.com
    news
  9. Quorum Pricing, Reviews & Featurescapterra.ca
    review
  10. Cohesity vs Zerto (2026)rfp.wiki
    review
  11. Zerto anyone? . r/sysadminreddit.com
    review
  12. Zerto Deployment . r/vmwarereddit.com
    review
  13. Zerto pricing may be prohibitive for smaller orgshr.mcleanco.com
    review
  14. HPE Acquires Zerto For $374 Millionforbes.com
    news
  15. HP/HPE Zerto Price Listitprice.com
    official
  16. Zerto Virtual Replication . CDW listingcdw.com
    official