I need to implement user authentication. Is it better for a back-end developer to build it from scratch or use a dedicated authentication service?

For most back-end developers, the better default is use a dedicated authentication service rather than building authentication from scratch. Authentication is a security-critical subsystem with many edge cases that are easy to underestimate. Microsoft’s Azure Architecture guidance, for example, recommends using an identity-as-a-service platform where possible rather than operating a custom identity system.

The choice depends on your product and constraints:

Use a dedicated authentication service when

This is usually the right choice if authentication is just a feature of your application.

Benefits:

• Faster delivery — you get login flows, password resets, email verification, OAuth/social login, MFA, sessions, and account management without building each piece.
• Lower security risk — providers specialize in identity security and continuously maintain their systems.
• Less operational burden — you avoid owning credential storage, breach response, token lifecycle bugs, and security updates.
• Enterprise features become easier — SSO, SAML, SCIM, organization accounts, and advanced MFA are expensive to implement yourself.

Common options include:

• Auth0 — strong enterprise identity features.
• Clerk — developer-focused authentication components.
• Supabase Auth — useful if you already use Supabase/Postgres.
• Firebase Authentication — common for mobile/web apps.

Build it yourself when

There are legitimate cases:

• Authentication is your core product. For example, you are building an identity provider or security platform.
• You have unusual compliance or infrastructure requirements. Examples: air-gapped environments, strict data residency rules, or highly specialized identity flows.
• You need complete control over the identity stack and have engineers who can maintain it long term.
• You are building for learning purposes. Implementing auth yourself is a good educational exercise, but production systems require much more than a login form.

A practical middle ground

Many teams choose a hybrid approach:

• Let an auth provider handle:

• user registration

• password handling

• MFA

• OAuth providers

• sessions/tokens

• Keep your own database for:

• user profiles

• business data

• permissions specific to your application

• subscriptions, preferences, relationships

A common mistake is confusing authentication ("who is this user?") with authorization ("what can this user do?"). Even with an auth provider, your back end should usually enforce application permissions itself.

Rule of thumb

• Startup/MVP/internal app: use a managed provider.
• Typical SaaS product: use a managed provider.
• Large enterprise app: usually use a managed provider or a self-hosted identity platform.
• Security product or identity platform: build your own.

If you are a back-end developer building a normal application, your engineering time is usually more valuable spent on your product’s domain logic than recreating an identity system.

For almost all modern applications, using a dedicated authentication service is significantly better than building from scratch.

Authentication seems simple on the surface (a username and a password), but it quickly balloons into a complex, high-risk security nightmare involving token management, password hashing, multi-factor authentication (MFA), rate limiting, and compliance.

Why You Should Use a Dedicated Authentication Service

• Security & Compliance: Services handle edge cases like credential stuffing, brute-force protection, and secure session management. They also help comply with regulations like GDPR, HIPAA, or SOC 2 out of the box.
• Time to Market: You can implement sign-up, login, password resets, and social logins (Google, GitHub, Apple) in hours rather than weeks or months.
• Advanced Features: Implementing MFA, passkeys, enterprise Single Sign-On (SSO/SAML), and magic links from scratch takes an immense amount of engineering effort. Dedicated providers include these natively.
• Maintenance Burden: Security vulnerabilities in crypto libraries or auth flows require immediate patching. Using a third-party offloads that ongoing maintenance risk.

Top Dedicated Authentication Services

• Auth0 (by Okta): Extremely feature-rich, highly customizable, and an industry standard for enterprise and consumer apps alike.
• Clerk: Incredible developer experience, modern UI components, and deeply optimized for modern frameworks like Next.js and React.
• Supabase Auth: Open-source Firebase alternative, great if you want tightly integrated PostgreSQL row-level security.
• Firebase Authentication: Free tier is generous, highly reliable, and integrates smoothly into mobile or simple web apps.
• Kinde: Great for B2B and SaaS products needing multi-tenancy and organization management quickly.

When to Build from Scratch

• Strict Data Sovereignty: You are in an industry or government sector where user data cannot touch third-party servers, and self-hosting an open-source tool (like Keycloak or Authentik) isn't permitted or feasible.
• Deeply Embedded Systems: You are building offline-first software or specialized internal tools with unique, non-standard local constraints.
• Pure Learning/Side Projects: If your primary goal is education—learning how hashing, salting, JWTs, and session cookies work under the hood—building a basic auth system is a fantastic exercise (just never use it in production).

To help narrow down the best path, tell me:

• What tech stack (languages/frameworks) is your back end using?
• Is this a consumer (B2C) app or an enterprise (B2B) product?
• Do you need features like social logins or multi-factor authentication (MFA) right away?

For most back-end developers, use a dedicated authentication service rather than building authentication from scratch. Build your application's authorization and business-specific identity logic yourself.

The key distinction is:

• Authentication (AuthN): “Who is this user?”
• Authorization (AuthZ): “What is this user allowed to do?”

OWASP explicitly treats these as separate concerns.

Why I wouldn't build AuthN from scratch

Authentication looks deceptively simple—email + password + session—but production-grade authentication quickly becomes a large security system:

• Password hashing and credential protection
• Account recovery and password resets
• Email verification
• Session/token management
• MFA
• Passkeys/WebAuthn
• OAuth/social login
• Brute-force and credential-stuffing defenses
• Account lockout/recovery
• Device/session management
• Secure MFA-factor replacement
• Security notifications and auditing
• Migration and credential revocation

The standards themselves are substantial. For example, NIST's current SP 800-63B-4 covers authentication assurance levels, authenticators, passwords, cryptographic authentication, and lifecycle management.

Even something as apparently straightforward as MFA-factor replacement needs special protection because an attacker with a hijacked session could otherwise replace the legitimate user's MFA factor. OWASP specifically recommends reauthentication and additional risk controls for this operation.

So you're not really choosing between:

“I write 500 lines of login code” vs. “I pay an auth provider.” You're choosing between owning an entire security subsystem and outsourcing much of it to specialists.

What I'd recommend

A good architecture is:

                   ┌──────────────────────┐
                   │ Authentication       │
                   │ Provider             │
                   │                      │
User ─────────────►│ Login / MFA / OAuth  │
                   │ Sessions / Passkeys  │
                   └──────────┬───────────┘
                              │
                         identity/token
                              │
                              ▼
                   ┌──────────────────────┐
                   │ Your Backend API     │
                   │                      │
                   │ Verify identity      │
                   │ Authorization        │
                   │ Business logic       │
                   │ User data            │
                   └──────────────────────┘

Your backend should still understand the authenticated user's identity and enforce permissions. Don't outsource authorization simply because you outsourced authentication.

For example:

Authentication provider:
    "This is user 123."

Your backend:
    "User 123 owns document 456, therefore they may edit it."

That separation is particularly important because being authenticated doesn't mean a user should have access to every resource.

When building it yourself makes sense

There are legitimate reasons to implement authentication yourself:

• You're building an identity/authentication product.
• You have unusual authentication requirements that providers can't accommodate.
• You operate in an environment where external identity providers aren't acceptable.
• You have a dedicated security team and the operational expertise to maintain it.
• You're doing it specifically as a learning project.

I'd distinguish “build it yourself to learn” from “build it yourself for production.” The former can be excellent. The latter is usually an unnecessary risk.

One important nuance

You don't necessarily need a fully hosted SaaS provider. There are roughly three options:

If you're a backend developer, I'd actually recommend learning how authentication works even if you don't implement it yourself. You should understand cookies vs. JWTs, sessions, OAuth/OIDC, password hashing, CSRF, MFA, passkeys, token expiration/revocation, and authorization.

But understanding the machinery doesn't mean you need to own the machinery.

Rule of thumb: outsource the cryptographic/account-authentication plumbing; own the identity model, authorization rules, and business logic.

If you tell me your stack (e.g. Node/NestJS, Python/FastAPI/Django, Go, Java/Spring, .NET) and whether this is a web app, mobile app, or API, I can recommend an architecture and the most appropriate auth approach.

• You're building an identity/authentication product.
• You have unusual authentication requirements that providers can't accommodate.
• You operate in an environment where external identity providers aren't acceptable.
• You have a dedicated security team and the operational expertise to maintain it.
• You're doing it specifically as a learning project.

I'd distinguish “build it yourself to learn” from “build it yourself for production.” The former can be excellent. The latter is usually an unnecessary risk.

One important nuance

You don't necessarily need a fully hosted SaaS provider. There are roughly three options:

For almost every modern application, using a dedicated authentication service is significantly better and safer than building user authentication from scratch.

Building auth seems simple on the surface (a username, a password hash, and a session cookie), but it quickly expands into a massive, high-risk security surface area.

Why You Shouldn't Build Auth From Scratch

• Security Risks : Handling password hashing (like Argon2 or bcrypt), salted hashes, secure session management, brute-force protection, and timing attacks leaves zero room for error. A single mistake exposes all user credentials.
• Feature Bloat : Users today don't just want email/password. They expect Multi-Factor Authentication (MFA), Passkeys, Social Logins (Google, GitHub, Apple), Single Sign-On (SSO), and account recovery flows. Building all of these consumes months of development time.
• Compliance & Privacy : Complying with GDPR, CCPA, and enterprise security standards means you have to securely manage data deletion, audit logs, and encryption at rest and in transit.

Why You Should Use a Dedicated Auth Service

• Speed to Market : You can integrate a complete, production-ready login, registration, and MFA flow in hours rather than weeks.
• Out-of-the-Box Security : Providers handle rate limiting, CAPTCHA integration, breached-password detection, and token rotation automatically.
• Scalability : High availability and scaling are managed for you, even during sudden traffic spikes or DDoS attacks.

Top Dedicated Authentication Services

• Auth0 (by Okta) : Highly customizable, enterprise-ready, and features robust documentation, though it can get expensive at scale.
• Clerk : Exceptional developer experience, specifically optimized for modern frameworks like Next.js, React, and full-stack web apps.
• Kinde : Great free tier, developer-friendly, and quick to set up for SaaS applications.
• Firebase Authentication : Simple, cost-effective, and deeply integrated if you are already using the Google/Firebase ecosystem.
• Supabase Auth : Open-source alternative that integrates seamlessly if you are already using Postgres/Supabase for your database.

When Might You Build From Scratch?

• Strict Data Residency/Air-Gapped Environments : If your software runs on an isolated network with zero internet access and cannot use external APIs.
• Deeply Regulated Systems : Highly specialized government or defense contracts that forbid third-party data processors.
• Learning/Side Projects : If the primary goal of the project is to learn cryptography, JWT handling, and session architecture rather than ship a product.

If you'd like to narrow down the right choice, tell me:

• What is your tech stack (languages/frameworks)?
• Is this a consumer app (B2C) or a business app (B2B) requiring multi-tenancy?
• What login methods do you need (just email/password, or social/SSO too)?

I can recommend the best specific service and give you an idea of how to start the integration.

For most back-end developers, use a dedicated authentication service rather than building authentication from scratch.

The key distinction is: build your application's authorization and user model yourself; outsource the cryptographic/authentication plumbing when practical.

Why I’d recommend a service

Authentication looks deceptively simple—email + password + session—but a production system quickly expands into:

• Password hashing and credential storage
• Password reset and account recovery
• Email verification
• Session/token rotation and revocation
• MFA
• Passkeys/WebAuthn
• OAuth/OIDC and social login
• Brute-force protection and rate limiting
• Suspicious-login detection
• Secure account/email changes
• Device/session management
• Security logging and incident response

OWASP explicitly recommends establishing and using standard, tested authentication services whenever possible, and recommends centralized authentication controls.

Modern authentication also increasingly involves phishing-resistant methods such as passkeys/WebAuthn; NIST's current guidance treats passwords as not phishing-resistant and requires phishing-resistant options at its AAL2 level.

When building it yourself makes sense

I'd consider custom authentication when:

• Authentication itself is a core product capability.
• You have unusual security/compliance requirements.
• You need complete control over where credentials and identity data are stored.
• Your organization already has a mature identity/security team.
• You're building an identity provider/authentication platform rather than merely an application.
• The learning experience is itself the goal.

If you're doing it primarily because "I'm a back-end developer and I should know how authentication works," that's a good reason to learn it, but not necessarily a good reason to ship your own implementation.

A good architecture

A practical setup is:

Authentication service → proves who the user is
→ issues an authenticated identity/token
→ handles passwords, MFA, passkeys, OAuth, recovery, etc.

Your back end → validates the identity/token
→ maps the identity to your User record
→ implements roles/permissions
→ decides whether the user can perform a particular operation

For example:

Browser / Mobile App
        |
        v
Authentication Provider
        |
        |  ID token / access token
        v
Your API
        |
        +--> User
        +--> Roles
        +--> Permissions
        +--> Application data

Don't confuse authentication ("Who are you?") with authorization ("Are you allowed to do this?"). Your application should generally own the latter.

One important caveat

A dedicated auth provider isn't magically secure. You're transferring trust to another organization. OWASP specifically notes that third-party MFA/authentication services introduce the risk that compromise of the provider could affect all applications depending on it.

So I'd evaluate providers on:

• OIDC/OAuth support
• Passkeys/WebAuthn
• MFA
• Session/token controls
• Account recovery
• Security history and transparency
• Data residency/compliance requirements
• Export/migration capabilities
• Pricing at your expected scale
• Whether you can avoid vendor lock-in

My rule of thumb: if you're building a normal SaaS/web/mobile application, don't roll your own authentication. Use a reputable identity provider and spend your engineering time on your application's authorization model, security boundaries, and business logic.

If you tell me your stack (e.g. Node/Express, Django, Spring, .NET), app type, and whether it's B2C or B2B, I can suggest an appropriate authentication architecture and provider choices.

For almost all modern applications, using a dedicated authentication service is significantly better and safer than building user authentication from scratch.

Building auth from scratch involves far more than just a simple password hash and a login form; it requires managing edge cases, compliance, and evolving security threats that have very little to do with your core business logic.

Here is a breakdown comparing both approaches to help you decide:

Building Auth from Scratch

• Control : Complete ownership over your database schema, user data, and infrastructure without relying on third-party vendors.
• Customization : Total freedom to tailor the login flow, UI, and multi-factor authentication (MFA) logic to hyper-specific requirements.
• Cost (Initial) : Appears free upfront because you aren't paying a SaaS subscription fee for the user management tool.
• Risk (Security) : High risk of vulnerabilities. You are personally responsible for correctly implementing password hashing (like Argon2 or bcrypt), salted hashes, secure session management, CSRF protection, rate limiting, secure cookie flags, and account lockout policies.
• Maintenance : High ongoing burden. You have to build and maintain password resets, email verification, OAuth/social login providers (Google, Apple, GitHub), MFA/TOTP, and security auditing yourself.

Using a Dedicated Authentication Service

• Security & Compliance : Built-in adherence to security best practices, automatic protection against credential stuffing, brute-force attacks, and data breaches. Many are also compliant with standards like SOC 2, HIPAA, and GDPR out of the box.
• Speed to Market : Pre-built UI components, SDKs, and ready-to-go flows for login, registration, password recovery, and social logins save weeks or months of engineering time.
• Advanced Features : Instant access to enterprise-grade features like Multi-Factor Authentication (MFA), Passkeys, Single Sign-On (SSO), and anomaly detection that would take ages to build from scratch.
• Maintenance : Minimal overhead. The service handles scaling, uptime, and security patches for the auth layer.
• Cost (Scaling) : Most services (such as Auth0, Clerk, Firebase Auth , or Supabase Auth ) offer generous free tiers, but costs scale up as your Monthly Active Users (MAUs) grow.

Popular Dedicated Services to Consider

• Clerk : Exceptional for modern full-stack web apps (Next.js, Remix) with drop-in UI components and deep developer experience.
• Auth0 (by Okta) : Highly customizable, enterprise-ready, and feature-rich for complex identity management.
• Supabase Auth / Firebase Auth : Great choices if you want tight integration with an existing Backend-as-a-Service or PostgreSQL database.
• Keto / Ory / Keycloak : Open-source, self-hosted alternatives if you want the features of a dedicated service but need to keep data on your own infrastructure.

If you'd like to narrow down the best path, let me know:

• What is your tech stack (languages and frameworks)?
• Does your app require enterprise features like SAML/SSO right away?
• Are you working on a personal/MVP project or an enterprise product?

For most back-end developers building a production application, use a dedicated authentication service rather than building authentication from scratch. Authentication is a security-critical subsystem, and the hard part is not the login endpoint—it is everything around it: password security, account recovery, MFA, OAuth flows, session management, abuse prevention, compliance, and keeping up with evolving standards.

A good rule:

If authentication is not the product, don't make it your infrastructure project.

Use a dedicated auth service when:

• You need to ship quickly.
• Your team is small or doesn't have dedicated security expertise.
• You need features like:
  • Google/GitHub/social login
  • MFA
  • passkeys
  • password reset flows
  • enterprise SSO/SAML
  • user management dashboards
  • audit logs
• You want someone else to maintain security-sensitive components.

Common choices include:

• Auth0 — strong enterprise features and broad ecosystem.
• Clerk — developer-focused authentication workflows.
• Supabase Auth — attractive if you already use Supabase/Postgres.
• Self-hosted identity platforms such as Keycloak if you need more control.

Build it yourself when:

There are cases where custom authentication is justified:

• Authentication is your core product (for example, you're building an identity provider).
• You have strict regulatory, residency, or air-gapped requirements.
• You need a very unusual authentication model that existing providers cannot support.
• You have engineers who will own identity infrastructure long-term.

Even then, "build from scratch" usually should mean assemble proven components, not write cryptography and identity protocols yourself.

What "rolling your own auth" really means

A basic version looks easy:

POST /signup
POST /login
GET /me

But production authentication quickly expands:

• Store passwords safely (Argon2id/bcrypt, salts, migration strategy)
• Session/token lifecycle
• Refresh token rotation
• Revocation
• Email verification
• Password reset security
• Rate limiting
• Brute-force detection
• OAuth/OIDC providers
• MFA
• Device/session management
• Account recovery
• Security monitoring

Many teams underestimate the maintenance burden after the initial implementation.

A practical architecture

A common pattern is:

Frontend
   |
   | login
   v
Auth Provider
   |
   | issues token/session
   v
Your Backend API
   |
   | verifies identity
   v
Your application logic

Your backend still owns authorization:

• "Can this user edit this document?"
• "Is this user an admin?"
• "Does this user belong to this organization?"

The auth provider handles authentication:

• "Who is this user?"
• "Did they prove their identity?"

My recommendation by project type

For a typical back-end developer building an application, I would spend engineering time on your domain logic and integrate a mature auth solution. You can always replace the auth layer later, but recovering from a security mistake in a home-grown identity system is much harder.

For almost all modern applications, using a dedicated authentication service is significantly better and safer than building user authentication from scratch.

Building auth from scratch involves a massive hidden surface area for security vulnerabilities, whereas dedicated services handle complex standards, compliance, and edge cases out of the box.

Why Using a Dedicated Auth Service is Better

• Security by Design - Auth providers specialize in hashing algorithms (like Argon2 or bcrypt), salt management, secure session handling, rate limiting, and protection against brute-force or credential stuffing attacks. Building this yourself leaves high room for costly human error.
• Compliance and Privacy - Services come pre-configured to meet compliance standards like GDPR, HIPAA, SOC 2, and CCPA. Implementing these data-handling and deletion rules from scratch requires extensive legal and engineering overhead.
• Advanced Features out of the Box - Multi-Factor Authentication (MFA), Passkeys, Enterprise SAML/SSO, Magic Links, and Social Logins (Google, Apple, GitHub) take weeks or months to code independently. Auth services provide them via simple configurations or SDKs.
• Maintenance Offloading - Handling edge cases like password resets, email verification delivery, token revocation, and multi-device session management eats up continuous maintenance time you could spend on core product features.

When Building from Scratch Might Make Sense

• Strict Data Sovereignty or Air-Gapped Environments - If your application runs on an isolated network with zero external internet access, third-party cloud services are not an option.
• Deep Learning or Core Product Focus - If you are building an identity provider or security tool as your primary product, building the underlying mechanics is part of the business model.
• Extreme Cost Constraints at Scale (Rarely) - While rare for early-to-mid stage projects, massive enterprise scale with billions of users can sometimes prompt a self-hosted open-source alternative (like Keycloak or Ory Kratos) rather than a per-monthly-active-user cloud bill.

Top Dedicated Auth Services to Consider

• Clerk - Excellent developer experience, beautiful pre-built components, and modern features like passkeys built specifically for modern web frameworks (Next.js, React, Node).
• Auth0 (by Okta) - The industry heavyweight with immense flexibility, robust enterprise federation, and extensive rule/action customization.
• Supabase Auth / Firebase Auth - Great choices if you are already using their respective database or backend-as-a-service ecosystems.
• Keycloak (Self-Hosted Open Source) - The go-to if you want the robust features of an enterprise auth service but need to host it entirely on your own infrastructure.

If you'd like to narrow down the best approach, tell me:

• What is your tech stack (frontend and backend)?
• Do you need social logins (Google, Apple) or enterprise SSO?
• Is this an internal tool , a consumer app , or a B2B SaaS?

For most back-end developers building a production application, use a dedicated authentication service rather than implementing authentication from scratch.

The important distinction is: you should build authorization/business rules yourself, but outsource identity management unless authentication itself is a core product requirement.

Why

Authentication looks deceptively simple—email + password + session—but production auth quickly expands into:

• Password hashing and credential storage
• Email verification
• Password resets and account recovery
• Session/token management
• MFA/passkeys
• OAuth/social login
• Account linking
• Rate limiting and brute-force protection
• Session revocation
• Credential-change handling
• Secure cookies, CSRF, XSS considerations
• Monitoring and abuse detection
• Migration and security updates

OWASP's current guidance, for example, recommends memory-hard password hashing such as Argon2id and has extensive guidance around authentication and session management.

A good architecture

I'd generally recommend:

             ┌────────────────────┐
             │   Your Frontend    │
             └─────────┬──────────┘
                       │
                       │ login
                       ▼
             ┌────────────────────┐
             │ Authentication    │
             │ Service / IdP      │
             └─────────┬──────────┘
                       │
                  identity/token
                       │
                       ▼
             ┌────────────────────┐
             │    Your Backend    │
             │                    │
             │ Authorization      │
             │ Business logic     │
             │ User data          │
             └────────────────────┘

Your backend verifies the authentication result and then decides what that authenticated user is allowed to do.

For example:

Authentication:
    "Is this really Alice?"

Authorization:
    "Is Alice allowed to delete this project?"

The latter should remain firmly under your application's control.

When building it yourself makes sense

I'd consider custom authentication if:

• Authentication is itself your product.
• You have unusual security/compliance requirements that an IdP can't satisfy.
• You need complete control over identity infrastructure.
• You're building an internal platform with a dedicated security team.
• You're doing it primarily as a learning exercise.

Even then, I'd strongly favor using mature, audited cryptographic libraries and protocols rather than inventing your own crypto or authentication protocol.

One particularly important point

Don't roll your own password hashing. If you do manage passwords yourself, use a purpose-built password hashing algorithm such as Argon2id rather than something fast like SHA-256. OWASP explicitly recommends this approach.

My rule of thumb

The biggest benefit isn't saving yourself from writing a /login endpoint. It's avoiding having to become responsible for every security edge case for years afterward.

If you tell me your stack (e.g. Node/Express, Django, Spring, .NET, Go) and whether this is a SaaS/web/mobile app, I can recommend a concrete architecture and the most sensible auth options for it.

For almost every modern application, using a dedicated authentication service is significantly better and safer than building it from scratch.

Authentication seems simple on the surface (a username and password check), but it quickly balloons into a massive, high-risk engineering effort involving cryptography, compliance, and edge cases.

• Building from Scratch

• Pros gives you complete control over the codebase, zero third-party data dependencies, and no recurring vendor pricing tiers as you scale.
• Cons requires implementing complex security protocols manually, such as secure password hashing (Argon2 or bcrypt), multi-factor authentication (MFA), OAuth/social logins, session management, token revocation, rate limiting, and account recovery flows.
• Security Risk is extremely high. A single oversight—like insecure JWT signing, improper salt generation, or missing timing-attack protections—can lead to a full data breach.
• Maintenance Burden is heavy. Your team is permanently on the hook for patching security vulnerabilities, maintaining compliance (GDPR, SOC2), and handling edge cases like password resets and brute-force protection.

• Using a Dedicated Authentication Service

• Examples include providers like Auth0 (by Okta), Clerk, Firebase Authentication, or Supabase Auth.
• Pros provides ready-to-use UI components , built-in multi-factor authentication, social login integrations (Google, Apple, GitHub), secure token handling, and automated compliance out of the box.
• Time-to-Market is fast. Instead of spending weeks or months building login flows, your back-end developer can integrate a secure SDK in a couple of hours.
• Security Standards are robust and handled by dedicated security teams, reducing your liability and ensuring industry best practices are followed natively.
• Cons introduces a third-party dependency, potential vendor lock-in, and costs that can scale up as your active user numbers grow.

Would you like to explore specific authentication providers (like Clerk vs. Supabase vs. Auth0) based on your tech stack and project scale?