1
Customer identity and access management for developer teams
Development teams under roughly 10,000 MAUs, or B2B SaaS vendors needing Organizations plus a handful of SAML connections who can absorb $150–$2,400/month; also regulated buyers willing to buy at Enterprise for the 99.99% SLA, HIPAA/BAA and FAPI profile.
View profileCompareOfficial site ↗From $35/month (B2C Essentials at 500 MAUs); B2B Essentials starts at $150/month at 500 MAUs · free tier: $0/month for up to 25,000 MAUs (B2C and B2B), 1 custom domain (card verification), passwordless, unlimited social connections, 5 Organizations, 1 Enterprise Connection, self-service SSO and SCIM, community support; no credit card to sign upMedium confidence 2
Hosted CIAM and developer auth platform, Auth0 inside
Product and engineering teams under ~25,000 MAU who want to ship customer login fast on the free tier, and B2B SaaS vendors needing multi-tenant Organizations, enterprise SSO and SCIM without building federation themselves.
View profileCompareOfficial site ↗B2C Essentials from $35/month (500 MAU); B2B Essentials from $150/month (500 MAU) · free tier: $0/mo, no credit card, up to 25,000 monthly active users, 1 custom domain, passwordless, unlimited social connections, 5 Organizations, basic attack protection, community support, 1 Enterprise Connection, self-service SSO and SCIM; separately a 30-day free trial on Okta Customer IdentityMedium confidence 3
Drop-in React authentication and user management for modern web apps
React/Next.js product teams shipping B2B SaaS or paid B2C below roughly 50k retained users, who value time-to-launch over auth-layer control, have engineers able to work around component styling limits, and whose incident tolerance can absorb slow vendor support.
View profileCompareOfficial site ↗From $25/mo (Pro) — vendor-domain explainer, not verified on the billing page · free tier: Free "Hobby" plan covering 50,000 monthly retained users; all features free in development modeMedium confidence 4
Developer-first enterprise identity for B2B SaaS
B2B SaaS companies with an enterprise sales motion and ACVs comfortably above ~$1,500/year per SSO customer that need SAML, SCIM and audit logs shipped in weeks, especially where MAU volume is high but the paid connection count is modest.
View profileCompareOfficial site ↗Enterprise SSO from $125/connection/month (third-party sourced; vendor pricing page not retrievable this session) · free tier: AuthKit/User Management free to 1,000,000 MAU, including email/password, social auth, Magic Auth, MFA, bot protection, identity linking, org modeling and domain verification; staging SSO and Directory Sync connections are unbilledHigh confidence 5
CIAM for customers, partners and guests on Microsoft Entra
Enterprises already running Microsoft Entra, Microsoft 365 and Azure that need partner and supplier guest access with governance, or customer-facing apps under 50,000 MAUs where password and social sign-in suffice without metered SMS.
View profileCompareOfficial site ↗Not published — the vendor pricing page rendered every dollar figure as '$-' on retrieval; the paid rate above 50,000 MAUs is stated only as 'per Monthly Active User' · free tier: Core offering free for the first 50,000 monthly active users (MAUs)Medium confidence 6
Self-hostable, API-first CIAM for engineering teams
Engineering-led B2C or mid-market B2B SaaS teams that need data sovereignty or on-prem CIAM, are comfortable with OAuth2/OIDC concepts, and want an API-first platform they can start free and later move to managed hosting without switching vendors.
View profileCompareOfficial site ↗Starter from $162/mo (billed annually, at the page default of 1,000 MAUs), community-forum support only, basic hosting included · free tier: Community — free, unlimited, self-hosted with core authentication features and community support (forums, Slack, GitHub); passkeys/WebAuthn and biometrics reportedly require registering a free Community licenceHigh confidence 7
Managed consumer sign-in SDKs for mobile and web apps
Consumer-facing mobile or web products with standard email/social/phone sign-in needs, especially teams already committed to Firestore or the wider Firebase/Google Cloud stack, and startups whose user base fits inside the 50,000 free MAU allowance.
View profileCompareOfficial site ↗$0.0055 per MAU/month above 50,000 Tier 1 MAUs (Blaze plan, pay-as-you-go) · free tier: Spark plan: no payment method required; other authentication services (email, social, anonymous) included at no cost; Phone Auth listed as 'Not applicable'. With Identity Platform: 50,000 MAUs free and 50 SAML/OIDC MAUs free.High confidence 8
Usage-billed CIAM for teams already building on AWS
Engineering teams already running on AWS that are building consumer or B2C applications with social/direct sign-in, either below 10,000 MAU (free) or above roughly 500,000 MAU on Lite, and with in-house capacity to wire up Lambda triggers, IAM, KMS and SNS/SES.
View profileCompareOfficial site ↗Lite: $0.0055 per MAU above the free tier (first band), $0.0046 per MAU next band — AWS example 950,000 MAUs = $4,405/month · free tier: 10,000 MAU/month per account or AWS Organization on Lite and Essentials (does not expire); 50 MAU/month for SAML 2.0/OIDC federated users on any tier; identity pools free of charge; no free tier on Plus, none for M2M token requests, and none in AWS GovCloud (US) RegionsHigh confidence 9
API-first authentication and fraud prevention for developers
Engineering-led teams wanting programmatic auth control across both consumer and B2B enterprise tenants, especially those needing SAML SSO and SCIM self-service for their own enterprise customers.
10
No-code CIAM with drag-and-drop auth flows and passkeys
B2B SaaS teams that need to become enterprise-ready quickly with multi-tenancy, self-service SAML/OIDC SSO, SCIM and RBAC/FGA, plus startups on the Hello World program or small projects that fit inside the 7,500-MAU free tier and want passkeys by default.
View profileCompareOfficial site ↗$249/month (Pro, billed annually) · free tier: Free Forever at $0: 7,500 MAUs, 10 monthly active tenants, 3 SSO connections, 1 federated app (OIDC), 5 test users, 10,000 M2M exchanges, 2,000 MACs, 2,000 MATKs, all auth methods, RBAC, MFA, no watermark, community support, 99% SLA, 1-week audit retentionMedium confidence 11
Embeddable CIAM and identity layer for B2B SaaS
Seed-to-Series-B B2B SaaS companies with natively multi-tenant products replacing homegrown auth, who want embedded admin portal, tenant-scoped roles and enterprise SSO at low or zero initial cost — especially teams that shortlisted Okta or Auth0 and found their multi-tenancy inadequate.
View profileCompareOfficial site ↗$0/month (Pay as you go); no per-MAU, per-connection or per-token rate published · free tier: Pay as you go at $0/month: fully customized hosted login, 7,500 monthly active users, 5 enterprise connections (SSO/SCIM), unlimited organizations, custom domain; 1 environmentHigh confidence 12
Open source self-hosted identity and access management server
Organisations with in-house platform/DevOps and Java/Kubernetes skills that want to run identity as infrastructure — especially high user volumes where per-MAU SaaS pricing dominates the budget, air-gapped or data-residency deployments, teams needing deep customisation, and existing Red Hat OpenShift Platform Plus, Application Foundations or Red Hat SSO customers.
View profileCompareOfficial site ↗Not published · free tier: Entire community edition is free to download and self-host; no plan ladder, no per-user or per-MAU meteringMedium confidence How this category is scored
Every platform here is scored against the same five components. The Expert Assessment component uses a rubric written specifically for auth & identity.
Developer Experience
How quickly a competent engineer gets to production.
Reliability
Uptime record, incident history and how failures are communicated.
Performance
Latency, throughput and behaviour under load.
Pricing & Predictability
Cost at real usage, and whether the bill can surprise you.
Ecosystem & Portability
Integrations, standards, and how hard it is to leave.
Security & Compliance
Access control, certifications and data handling.
Support
Response quality when production is broken.
Sources currently active: Product Hunt, Apple App Store, Google Play, Vendor Documentation, TOP10 Editorial Research, TOP10 AI Visibility Panel, TOP10 Citation Discovery, TOP10 Ratings Refresh, VIZS AI Visibility, TCS Citation Intelligence, G2, Trustpilot, Capterra, TrustRadius, Software Advice. How sources are weighted.