Data as of Aug 25, 2026 · Based on 316 AI responses from ChatGPT Search and Google AI Mode · See how Parse measures this
For a growing startup, your best fit depends on your existing setup. If you already use Microsoft 365, 
Brands AI recommends here
Named in 62% of answers
A highly versatile identity platform known as an industry standard. It is excellent for robust features and massive integration support, though it can be more complex or costly for very small, early-stage teams to manage.
Named in 53% of answers
Named in 49% of answers
Ideal for cloud-first startups that need to manage both application access and employee devices from one simple admin console. It is less about complex customer flows and more about unified internal IT administration.
Named in 45% of answers
The top recommendation for startups already operating within the Microsoft 365 ecosystem. It provides native identity and conditional access security without requiring a separate third-party vendor to unify your security stack.
Source | Citation share |
|---|---|
The best 5 SSO providers to power your SaaS app in 2025 — WorkOShttps://workos.com/blog/the-best-5-sso-providers-to-power-your-saas-app-in-2025 | 3.5% |
Quick wins—single sign-on (SSO) and Multi-Factor Authentication (MFA)https://www.microsoft.com/en-us/security/blog/2020/03/03/single-sign-on-sso-multi-factor-authentication-mfa/ | 1.8% |
 10 Best SSO Providers & Solutions in 2026https://blog.scalefusion.com/best-sso-solutions/ | 1.7% |
 Easy Guide To Implementing Single Sign On | Cisco Duohttps://duo.com/learn/implement-single-sign-on | 1.6% |
 Top 5 Single Sign-On Software Of 2025 - TechDogshttps://www.techdogs.com/td-articles/product-mine/top-5-single-sign-on-software-of-2025 | 1.5% |
 Best 10 Multi-Factor Authentication (MFA) Providers for 2025 | Ripplinghttps://www.rippling.com/blog/mfa-providers | 1.5% |
 FusionAuthhttps://en.wikipedia.org/wiki/FusionAuth | 1.2% |
 10+ Best Single Sign-On (SSO) Providers for 2026https://www.infisign.ai/blog/top-10-single-sign-on-sso-providers-solutions-in-2024 | 1.1% |
 10 Best SSO Solutions for 2026: Features & Comparison | OLOIDhttps://www.oloid.com/blog/sso-solutions | 1.1% |
 10 Best Multi-Factor Authentication Solutions in 2026 | MojoAuth Blog - Passwordless Authentication & Identity Solutionshttps://mojoauth.com/blog/best-multi-factor-authentication-solutions | 1.1% |
For a growing startup, setting up SSO (Single Sign-On) and MFA (Multi-Factor Authentication) doesn't have to be an enterprise-scale headache. Where you should start depends heavily on whether you are securing internal tools for employees (workforce identity) or building authentication into a product for your customers…
For a growing startup, setting up SSO (Single Sign-On) and MFA (Multi-Factor Authentication) doesn't have to be an enterprise-scale headache. Where you should start depends heavily on whether you are securing internal tools for employees (workforce identity) or building authentication into a product for your customers (customer identity).
Top, startup-friendly options are organized below by use case, followed by a quick deployment roadmap.
Your 3-Step Action Plan
To help narrow down the exact right fit, tell me:
For a growing startup, I’d **avoid building SSO/MFA yourself**. Start with a managed identity provider (IdP) and make it the single place where authentication and MFA policies live. ### A simple starting architecture **Your apps → Identity provider → SSO/MFA → user**
For a growing startup, I’d avoid building SSO/MFA yourself. Start with a managed identity provider (IdP) and make it the single place where authentication and MFA policies live.
Your apps → Identity provider → SSO/MFA → user
Your application should redirect users to the identity provider rather than storing or validating their passwords itself. For modern apps, OpenID Connect (OIDC) is usually the best default; SAML is important when you need to support enterprise customers. Microsoft’s current guidance similarly recommends OIDC for modern applications and SAML for broader enterprise compatibility.
My startup default: If you're building a B2B SaaS product, I'd shortlist WorkOS and Auth0 first. If you're primarily securing employees' access to internal tools, I'd look at Entra ID or Okta instead.
Require MFA for your employees and eventually for customers where appropriate. Prefer passkeys/WebAuthn/security keys because they're phishing-resistant. NIST specifically notes that manually entered OTPs and similar codes aren't considered phishing-resistant, while FIDO/WebAuthn authenticators are a widely available phishing-resistant option.
A practical policy is:
For a small engineering team, keep the first version deliberately boring:
Week 1: Choose an IdP and create a development tenant. Week 1–2: Integrate OIDC using the provider's SDK/library. Week 2: Enable hosted login and MFA. Week 2: Add roles/authorization in your application—authentication and authorization are separate concerns. Later: Add SAML SSO and SCIM/directory provisioning when enterprise customers actually require them.
The important architectural decision is to make your application depend on standard identity tokens, not on the provider's proprietary user/session model. That gives you much more flexibility if you eventually change providers.
If you tell me your stack (e.g. Next.js, React, Python, Go, etc.), whether this is B2B or B2C, and roughly how many employees/users you have, I can narrow this down to a concrete, low-complexity setup.
For a growing startup, I’d **avoid building SSO/MFA yourself**. Use a managed identity provider and integrate your apps with standard protocols such as **OIDC/OAuth 2.0**; add **SAML** when enterprise customers require it. ## A simple starting architecture **Your apps → Identity Provider (IdP) → MFA**
For a growing startup, I’d avoid building SSO/MFA yourself. Use a managed identity provider and integrate your apps with standard protocols such as OIDC/OAuth 2.0; add SAML when enterprise customers require it.
Your apps → Identity Provider (IdP) → MFA
The IdP handles:
That keeps authentication logic out of each individual app. Microsoft Entra, for example, acts as a central identity platform and supports SSO through both SAML and OIDC.
For a startup, I’d shortlist:
The right choice depends heavily on whether you're securing your employees' internal apps, your SaaS customers, or both.
I'd make phishing-resistant MFA/passkeys the long-term target. NIST's current Digital Identity Guidelines (SP 800-63-4, published in 2025) specifically address modern authenticators and federation, while its authentication guidance recommends verifier-impersonation-resistant authenticators against phishing.
A sensible progression is:
Microsoft Entra, for example, currently supports passkeys/FIDO2 as part of its phishing-resistant authentication options.
If you're building a B2B SaaS product, I'd start by evaluating WorkOS vs. Auth0. If you're primarily securing employees and internal applications, I'd start with Entra ID or Okta.
Before choosing, answer these four questions:
Give me those four details and I can narrow it down to one or two providers and a concrete implementation architecture.
Securing your startup's apps with SSO and MFA is a critical milestone. For a growing team, you want a modern **Identity and Access Management (IAM)** platform that is easy to set up, scales with you, and offers strong developer APIs or out-of-the-box…
Securing your startup's apps with SSO and MFA is a critical milestone. For a growing team, you want a modern Identity and Access Management (IAM) platform that is easy to set up, scales with you, and offers strong developer APIs or out-of-the-box integrations.
Here are the top platforms to consider, ranked by how startups typically adopt them:
To help narrow down the best fit , tell me:
Securing a growing startup with SSO and MFA is a smart move. For a streamlined start, you want platforms that handle user directories, offer easy developer integrations, and scale without enterprise-level…
Securing a growing startup with SSO and MFA is a smart move. For a streamlined start, you want platforms that handle user directories, offer easy developer integrations, and scale without enterprise-level friction.
Here are the top identity providers (IdPs) where you should start looking:
To begin implementation smoothly:
To help narrow down the best fit, let me know:
For a growing startup, start by treating **identity as your security control plane**: pick one identity provider (IdP), connect your apps to it, enforce MFA, and automate user onboarding/offboarding. Avoid building your own authentication system unless you are specifically building a customer identity product.…
For a growing startup, start by treating identity as your security control plane: pick one identity provider (IdP), connect your apps to it, enforce MFA, and automate user onboarding/offboarding. Avoid building your own authentication system unless you are specifically building a customer identity product.
A practical path:
There are two common cases:
A. Securing your employees (workforce SSO)
B. Adding login for your customers
A simple rule of thumb:
Regardless of vendor:
Week 1
Week 2
Week 3
Week 4
For many startups, the best first decision is simply: use the identity system you already pay for (Google Workspace or Microsoft 365), then move to Okta/JumpCloud when your app count, compliance needs, or team size justify it.
If you tell me your approximate size (e.g., 10, 50, 200 employees), whether you use Google Workspace or Microsoft 365, and whether you mean employee SSO or customer login, I can narrow it down.
Securing a growing startup with SSO and MFA is a smart move. For a streamlined setup, you want a modern **Identity and Access Management (IAM)** platform that scales easily without requiring a massive IT…
Securing a growing startup with SSO and MFA is a smart move. For a streamlined setup, you want a modern Identity and Access Management (IAM) platform that scales easily without requiring a massive IT department.
Here is where you should start, broken down into a practical roadmap:
To help narrow down the best platform for your team, tell me:
For a growing startup, I’d **avoid building SSO/MFA yourself**. Use a managed identity provider (IdP) so your team can focus on the product while the provider handles authentication flows, MFA enrollment, recovery, and integrations. ### A good starting point **1. Decide whether you're B2C or B2B**
For a growing startup, I’d avoid building SSO/MFA yourself. Use a managed identity provider (IdP) so your team can focus on the product while the provider handles authentication flows, MFA enrollment, recovery, and integrations.
1. Decide whether you're B2C or B2B
2. Shortlist 3 providers
| Provider | Best fit | Why consider it |
|---|---|---|
| Clerk | Startup / developer-first SaaS | Very easy integration, polished hosted UI, MFA, organizations, SSO |
| Auth0 | Broad/general-purpose needs | Mature identity platform with a large feature set |
| WorkOS | B2B SaaS / enterprise sales | Particularly strong for SAML SSO, SCIM, and enterprise identity |
Current pricing makes Clerk particularly interesting for a small startup: its Pro plan includes MFA and one enterprise connection, while WorkOS is more oriented toward enterprise SSO as a standalone capability.
If you're early-stage and want the least engineering effort, I'd start by evaluating Clerk.
If your sales pipeline already contains customers saying "We need SAML SSO and SCIM before we can buy," I'd evaluate WorkOS very seriously.
If you anticipate complicated identity requirements across consumer + B2B + enterprise customers, Auth0 is worth the additional complexity.
Regardless of vendor:
Phase 1: Managed login + MFA → get secure authentication into production quickly.
Phase 2: Add organizations/roles → establish your authorization model.
Phase 3: Add SAML/OIDC SSO → when enterprise customers require it.
Phase 4: Add SCIM + audit logs → when enterprise procurement/security requirements justify it.
The important architectural decision is to make your application depend on a stable identity abstraction—e.g. user_id, organization membership, roles—rather than scattering provider-specific authentication logic throughout your code. That makes switching providers later much less painful.
If you tell me your stack (e.g. Next.js, React, Python, Rails), whether you're B2B or B2C, and roughly how many users you expect, I can narrow this to a specific recommendation and implementation approach.
For a growing startup, the simplest path is usually **not to build authentication yourself**. Start by choosing an **Identity Provider (IdP)** that handles SSO, MFA, user lifecycle, and security policies for you. SSO typically works by having a central identity provider authenticate the user and issue a token that…
For a growing startup, the simplest path is usually not to build authentication yourself. Start by choosing an Identity Provider (IdP) that handles SSO, MFA, user lifecycle, and security policies for you. SSO typically works by having a central identity provider authenticate the user and issue a token that connected applications trust.
A practical starting plan:
Separate two common needs:
These often use different solutions. Many startups begin with workforce identity first, then add customer identity tooling when the product needs enterprise login features.
For a small team, evaluate managed options such as:
For a startup, prioritize:
SSO implementations commonly rely on standards such as SAML 2.0 and OIDC; choosing an IdP that supports the protocols your apps need avoids custom integrations later.
Enable MFA for:
Prefer:
Treat SMS as a fallback rather than the primary method when possible.
A low-friction rollout:
A good first decision point is:
If you share your stack (e.g., Google Workspace vs Microsoft 365, AWS/GCP/Azure, SaaS product vs internal apps, employee count), I can narrow this to a few realistic options.
For a growing startup, setting up SSO and MFA doesn't have to be a massive enterprise headache. You want a **modern Identity and Access Management (IAM)** platform that is fast to deploy, scales with you, and offers strong developer APIs if you have custom…
For a growing startup, setting up SSO and MFA doesn't have to be a massive enterprise headache. You want a modern Identity and Access Management (IAM) platform that is fast to deploy, scales with you, and offers strong developer APIs if you have custom apps.
Here is where you should start, broken down into options and a quick game plan:
Top SSO & MFA Solutions for Startups
Recommended Action Plan
To help narrow down the best fit, let me know:
