Frontegg

Frontegg is a developer-first Customer Identity and Access Management (CIAM) platform, founded in 2021 in Israel and backed by roughly $70M from Insight Partners, Stripes and others. It targets B2B SaaS companies that need multi-tenant identity out of the box: every account is modeled as a tenant with its own users, roles, SSO connections, branding and security policies. Where Auth0 and Okta historically grew up around single-tenant or workforce use cases, Frontegg's core differentiator is that multi-tenancy, self-service admin portals, and per-tenant configuration are first-class primitives rather than bolt-ons. The product spans authentication (passwordless, social, MFA, SSO/SAML, M2M), authorization (RBAC, ReBAC, and entitlements/feature-gating tied to billing plans), pre-built and embeddable login boxes, customer-facing admin portals, and more recently an AI agent identity SDK.

The platform's strongest pull is time-to-value for engineering teams. Reviewers repeatedly describe it as plug-and-play, citing fast React/Angular/Next.js integration, a hosted login that can be stood up in hours, and responsive support (including a shared Slack channel) as the main reasons they chose it over building auth in-house. Frontegg pushes auth/authz checks to the edge for performance, and the entitlements engine that links feature access to subscription plans is unusually well-suited to SaaS monetization. G2 sentiment is strongly positive (about 4.8/5 across 360+ reviews), and the platform frequently wins head-to-head comparisons against Auth0/Okta on login UX, MFA and SAML setup.

The trade-offs are concentrated in flexibility and scale. The most common complaints are restricted customization of the hosted/embedded login UI for teams with very specific branding needs, limited webhook configurability, gaps in the tenant/user-management UI, an inability to bring your own user database, and documentation/API-coverage gaps that surface during deeper integrations. Some larger customers note that certain features feel tuned for smaller-scale deployments. Pricing is usage-based and starts free (Pay-as-you-go), but costs scale with MAUs, enterprise SSO/SCIM connections and M2M tokens, and the 99.99% uptime SLA, advanced fraud protection and multiple environments are gated behind custom-priced Enterprise. Net: an excellent fit for B2B SaaS teams that want production-grade multi-tenant identity quickly, with the caveat that highly bespoke UX or self-hosted-data requirements push you toward the Enterprise tier or a competitor.