Comparison

Quorum vs Zerto

Quorum and Zerto both land on Depends.

Quorum

Depends

Confidence: Low

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

Depends

Confidence: Medium

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

Quorum versus Zerto
Compare	Quorum	Zerto
Verdict	Depends	Depends
Best for	On-prem server shops	VMware-heavy midsize and enterprise IT
Who it's not for	Cloud-only startups . no servers to recover	Small orgs . pricing called prohibitive
Privacy	One known XSS vulnerability (CVE-2024-44449) in onQ OS v6.0; no broader public vulnerability history found in the sources reviewed.^⁴	No Zerto breaches found; vendor runs proactive vulnerability management and ships a pre-hardened ZVM appliance.
Support quality	No direct support evidence found	Only vendor marketing claims in evidence
Public sentiment	Usable 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.^²	Reddit admins and reviewers call Zerto the best real-time replication for DR, praising ease of use while repeatedly flagging cost.
Biggest gotcha	XSS (CVE-2024-44449) disclosed in onQ OS v6.0 . confirm patch status before buying.^⁴	HPE price list shows $5.43M for a 2,500-VM, five-year enterprise package¹⁵