What AI says about Firmex

Firmex — Highly favored in legal and compliance-heavy environments. It lets you easily set explicit user-group permissions

Firmex VDR — Widely recognized as a powerhouse for mid-market M&A, legal, and complex due diligence.

Firmex — Best for Structured Q&A Management . If your primary friction point is answering endless document-related questions from multiple competing parties, Firmex provides one of the cleanest, most robust structured Q&A workflows in the industry

Firmex — probably the safest middle ground. Strong permissions, Q&A, document controls, and a relatively intuitive workflow.

Firmex : Provides strict access controls enabling administrators to disable printing, saving, and downloading, paired with dynamic watermarking.

Firmex explicitly offers DRM controls to disable printing, saving, copying, and sharing.

Standard enterprise VDRs (like Datasite, Intralinks, or Firmex) are optimized for text-heavy legal/financial PDFs and frequently choke, throttle, or trigger massive overage fees when handling gigabyte-scale CAD assemblies

Firmex is particularly interesting for your use case: its current product page advertises drag-and-drop uploads of files up to 50 GB

My shortlist would be iDeals, Firmex, Datasite, SS&C Intralinks, and Papermark.

Firmex: Known as one of the most secure and compliance-heavy rooms, Firmex is a favorite for legal teams and complex due diligence pipelines.

Firmex (Best for Multi-Bidder Q&A Workflows) — Known as an administrative favorite

Firmex has particularly strong traditional VDR functionality: granular document/user permissions, DRM, watermarking, document expiry, remote revocation, Q&A, redaction, audit reporting and 24/7 support.