Authentication that's secure, not just functional.
Rolling your own auth is the most common source of security vulnerabilities in web applications. Clerk, Auth.js, and Supabase Auth handle the complexity correctly. Implementing them well — multi-tenant, role-based access, SSO — requires specific experience.
Need authentication implemented — signup/login, social auth, MFA, SSO, or role-based access control
Authentication has more surface area than most developers account for:
The auth surface for a typical SaaS:
- Email/password signup with email verification
- Password reset via email
- Social auth (Google, GitHub, Apple)
- Session management (JWT or database sessions)
- RBAC (admin, member, viewer)
- Multi-tenant isolation (user belongs to org, data scoped to org)
- MFA (TOTP authenticator apps)
- SSO/SAML (for enterprise customers)
Why not roll your own: Password hashing (bcrypt rounds), session token generation (cryptographically secure), timing-safe comparisons, rate limiting on login endpoints — each has known attack vectors. Clerk and Auth.js have handled these. Use them.
Clerk vs Auth.js:
Clerk: hosted auth, handles the UI and backend. Fastest to implement. Best for: projects that want zero auth infrastructure management.
Auth.js (NextAuth): open-source, self-hosted, more configuration. Best for: projects that need full control, custom database, or complex auth flows.
Multi-tenant auth:
Users belong to organizations. Organizations have roles. Access control at the organization level. Clerk has first-class multi-tenancy (Organizations feature). Auth.js requires custom implementation.
Authentication with Clerk or Auth.js — signup, login, social auth, MFA, and role-based access control
Clerk or Auth.js
setup with email and social providers
Multi-tenant
organization model
RBAC
with role definitions and middleware
MFA
configuration
SSO/SAML
for enterprise (Clerk or custom)
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
Authentication with Clerk or Auth.js — signup, login, social auth, MFA, and role-based access control
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Auth scope is the provider list, the role model, and the tenant structure. Fixed-price.
Questions, answered.
Same auth backend, different client. Clerk has an Expo SDK. Auth.js is web-only (use Expo's token-based approach with the backend API). Decide on the auth provider before starting mobile development.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.