Comparison

FusionAuth vs Frontegg

FusionAuth and Frontegg both land on Depends.

FusionAuth

Depends

Confidence: Medium

Buy if you have engineers who want complete control over authentication, authorization, and identity data.

Depends

Confidence: Medium

Buy it if you run a B2B SaaS with multi-tenant customers, enterprise SSO demands, and a dev team to integrate it.

FusionAuth versus Frontegg
Compare	FusionAuth	Frontegg
Verdict	Depends	Depends
Best for	Developer teams wanting full auth control	B2B SaaS with multi-tenant orgs
Who it's not for	Small teams needing simple email/password login	Simple consumer apps . full CIAM is overkill
Privacy	Two public CVEs (RCE in 2020, file read fixed in 1.41.3); vendor runs an active disclosure and testing program.^⁵	Mature posture: public bug bounty, trust center, VDP . but its WordPress SAML SSO plugin shipped a critical auth-bypass CVE.¹⁶
Support quality	No usable evidence in sources reviewed	G2 reviewers cite excellent customer support
Public sentiment	Sources reviewed contain no verbatim user feedback; SourceForge lists reviews but no quoted ratings surfaced.^¹	G2 users rate Frontegg 4.8/5 across 367 reviews, often citing strong support, while Reddit threads more often question pricing.^⁹
Biggest gotcha	Two CVEs on record (RCE, file read); patch discipline is mandatory, not optional.^⁴	Its WordPress SAML SSO plugin (≤1.0.1) had unauthenticated account takeover . patch or drop it.