Clerk

Clerk is an authentication and user-management product for application teams, with account components, APIs, organization tools, and subscription billing. It is best suited to teams building apps that need customer identity alongside business accounts and provisioning. Its broad feature set is appealing, but session and log-retention limits, US-only hosting, and Billing charges can rule it out.

Overview

Clerk brings sign-in, user profiles, organizations, and billing capabilities into one product. Prebuilt components cover sign-up, sign-in, and profiles, while Frontend, Backend, and Platform HTTP APIs support client-side, server-side, and workspace-resource operations. That combination can help teams avoid stitching together separate account-management pieces; the trade-off is that plan limits and the cost of Billing deserve attention before committing.

Key features

Authentication and security

Clerk supports SAML, OIDC, and OAuth 2.0, plus directory synchronization and lifecycle provisioning. MFA methods include SMS codes, authenticator apps using TOTP, backup codes, and passkeys. Account lockout, bot protection, rate limiting, breached-password detection, and MFA enforcement cover several important account-security controls.

Clerk says it holds SOC 2 Type 2 and HIPAA certifications. SOC 2 reports are available on Business and above, while a HIPAA BAA is available on Enterprise. Teams that need those assurances should account for the plan boundary: HIPAA agreement access requires Enterprise.

Organizations, integrations, and Billing

The free B2B offering supports 100 monthly retained organizations per app, with up to 20 members per organization. That gives smaller organization-based apps room to start, but the caps matter for products expecting many retained accounts or larger customer workspaces. Clerk documents integrations with Convex, Firebase, Supabase, Shopify, Vercel Marketplace, and Google Analytics.

Clerk Billing handles subscription billing, charging 0.7% of billing volume on top of Stripe fees. That can keep billing close to identity and organization management, but it adds a usage-based cost beyond the payment processor's fees.

Pricing

Clerk uses a freemium model, with paid plans from $20/mo (annual). The free Hobby plan is useful for evaluating or launching a smaller app, but its session and log limits are restrictive for teams that need longer-lived sessions or audit history.

There is no free trial. Billing charges of 0.7% of billing volume, in addition to Stripe fees, should be included in any cost comparison for teams using Clerk Billing.

Platforms

Clerk supports Android, iOS, web, APIs, and an extension. It provides an iOS SDK for native Apple applications. Data is hosted on US infrastructure, with no regional data residency, so teams requiring another hosting region should look elsewhere.

Who it's for

Clerk is a strong candidate for application teams that want prebuilt account flows, APIs, and organization management in one service, particularly when directory sync, lifecycle provisioning, or multiple MFA methods matter. It is less suitable for teams that require regional data hosting, need longer sessions or logs on the free plan, or want subscription billing without a separate percentage charge.

Pros and cons

• Pros: Prebuilt sign-up, sign-in, and profile components give teams ready-made account flows.
• Pros: Organizations, directory sync, lifecycle provisioning, and several MFA methods address both customer and business-account needs.
• Pros: The free B2B allowance of 100 retained organizations per app and 20 members per organization offers a concrete starting point for smaller organization-based products.
• Cons: Hobby sessions expire after 7 days and application logs last one day, limiting its fit for teams needing longer sessions or longer log history.
• Cons: US-only infrastructure and no regional residency option exclude teams with non-US hosting requirements.
• Cons: Billing adds a 0.7% charge on billing volume in addition to Stripe fees.
• Cons: A HIPAA BAA requires Enterprise, and SOC 2 reports are available only on Business and above.

Alternatives

Choose Bitwarden instead if password management across unlimited devices and passwords is the priority; its free plan also covers basic password management. Consider id3 Face SDK when face-oriented authentication is the need, with a free 30-day evaluation that limits API calls and supports a single platform. StrongKey FIDO Server is a better fit for teams seeking an open-source download with unlimited users, applications, and transactions stated for its solution. Ory is worth comparing for teams considering its Ory Network developer tier or a production environment priced at $770 / year. Descope offers a free tier with 7,500 MAUs, 10 monthly active tenants, and 3 SSO connections, while Hanko offers a Starter tier with 10,000 monthly active users and 2 projects, or a Pro plan at $29 a month. HUAWEI Analytics Kit is an alternative for free data analysis, including 30+ automatically collected events and 500 custom events. Passwordless.dev is another option for teams looking for a free tier covering up to 10,000 users and one app per organization.

For a broader shortlist, see Biometric Authentication Software, Identity and Access Management Software, Passwordless Authentication Software, and Passkey Authentication Software.

Verdict

Choose Clerk if your app needs authentication, organization management, provisioning, and billing capabilities together, and its US hosting and plan terms fit your requirements. Its main advantage is the breadth of account and organization features in one product; look elsewhere if you need regional data residency, more generous Hobby sessions or log retention, or lower billing costs.