Comparison

PrimeFaces vs Vaadin: Java Framework for Building Enterprise Web Applications

PrimeFaces and Vaadin: Java Framework for Building Enterprise Web Applications both land on Depends.

PrimeFaces

Depends

Confidence: Medium

Buy only if your team is already committed to JSF/Jakarta Faces and wants a mature, free component suite.

Depends

Confidence: Low

Choose Vaadin if you run a Java-heavy enterprise team building rich internal apps and can absorb framework lock-in.

PrimeFaces versus Vaadin: Java Framework for Building Enterprise Web Applications
Compare	PrimeFaces	Vaadin: Java Framework for Building Enterprise Web Applications
Verdict	Depends	Depends
Best for	Existing JSF/Jakarta Faces shops	Java-only teams avoiding JavaScript frontends
Who it's not for	Greenfield web apps . JSF is a dated stack	Non-Java teams
Privacy	Multiple public CVEs, including a documented RCE in 5.x-6.0 . stay current and audit old deployments.^⁴	Active PSIRT with published policy; several low-to-medium CVEs disclosed and patched 2025-2026.¹¹
Support quality	Paid Elite tier exists; users needed outside experts	PSIRT SLA only; no support reviews found
Public sentiment	Developers value the component breadth but describe a heavy, dated experience with a real learning curve.^⁶	No genuine user reviews were found in the sources reviewed; third-party results were mostly spam pages or duplicated marketing copy.¹⁴
Biggest gotcha	Major-version upgrades break things: widgetVars rendering broke for teams moving to v14¹⁵	Medium-severity 2026 CVEs: unauthorized session creation and XSS . patch promptly¹¹