Comparison

draw.io (diagrams.net) vs ER/Studio

draw.io (diagrams.net) lands on Worth it, and ER/Studio lands on Depends.

draw.io (diagrams.net)

Worth it

Confidence: Medium

Use it if you want free diagramming with your data kept local. engineers, small teams, and Atlassian users get the most.

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ER/Studio

Depends

Confidence: Medium

ER/Studio fits enterprise data architecture teams governing large, multi-database estates with budget for admins and training.

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draw.io (diagrams.net) versus ER/Studio
Compare	draw.io (diagrams.net)	ER/Studio
Verdict	Worth it	Depends
Best for	Engineers drawing UML and flowcharts	Enterprise data architecture teams
Who it's not for	Enterprise architects needing object metadata and model governance	Solo developers and startups . costly overkill
Privacy	Security-first: data stays local or in your Atlassian instance; two XSS CVEs documented, latest patched in v29.7.12.^⁸	No known public vulnerabilities found in the sources reviewed.
Support quality	No support evidence found	No support evidence in sources
Public sentiment	Users call it a free, easy Visio alternative; complaints focus on business-use limits and thin metadata support.^⁴	Enterprise modelers praise the modeling depth, but ratings are middling and community feedback is thin.¹²
Biggest gotcha	CVE-2026-46642 XSS flaw; update to v29.7.12 or later^⁸	Expect sales negotiation before seeing any price; costs scale with repository and team editions¹⁴

Pick draw.io (diagrams.net) when

Engineers drawing UML and flowcharts
Privacy-sensitive orgs (data stays local)
Confluence/Jira teams
Zero-budget teams

When draw.io (diagrams.net) is not a fit

Enterprise architects needing object metadata and model governance
Teams wanting AI-assisted whiteboarding
Data-modeling teams needing deep ER tooling
Buyers requiring vendor support SLAs. none documented

Pick ER/Studio when

Enterprise data architecture teams
Financial services data governance
Large multi-database estates
PowerDesigner/erwin migrants

When ER/Studio is not a fit

Solo developers and startups . costly overkill
Quick-and-dirty ER diagramming . use Visio
Teams without a dedicated data architect
Buyers wanting transparent, self-serve pricing

Sources

Security-first diagramming for teams | draw.iodrawio.com
official
Your diagram data is secure and private with draw.iodrawio.com
official
Pricing - draw.iodrawio-app.com
official
draw.io Reviews from Real Users - TrustRadiustrustradius.com
review
Draw.io Reviews - G2g2.com
review
Draw.io Review - PCMagpcmag.com
review
Using draw.io, thoughts? - Redditreddit.com
review
CVE-2026-46642 Detail - NVDnvd.nist.gov
security
CVE-2026-46642: draw.io XSS Vulnerability - SentinelOnesentinelone.com
security
CVE-2022-1575 Stored XSS - GitHubgithub.com
security
Uncovering the Limitations of Draw.io for Business Use - LinkedInlinkedin.com
review
ER/Studio Data Architect Reviews . Gartnergartner.com
review
ER/Studio . 7wData7wdata.be
review
ER/Studio Pricing 2026 . TrustRadiustrustradius.com
review
Buy ER/Studio online . Idera Storestore.idera.com
official
Support for All Major Databases and Platformserstudio.com
official