Sign-in and users: free tiers side by side

8 services, 8 with a free tier. Values are copied from each pricing page as of Oct 23, 2026. Open Evidence on any row to read the exact sentences.

Picks for authentication (TierDiff's overall score)

1st Clerk
2nd WorkOS AuthKit
3rd Auth0

See why

Best in its column Not on the pricing pageCopy gives tab-separated rows with source links and the check date

Free-tier limits of 8 sign-in and users services
Service					Source
WorkOS AuthKit	1M	not published	not published	not published	workos.comchecked Oct 22 Official site
Monthly active users1,000,000 users / mo…free users? WorkOS User Management is free for up to 1 million monthly active users. A user is considered active if they… Quoted from workos.com/pricing, checked Oct 22, 2026.
Clerk	50K	1	not published	3	clerk.comchecked Oct 22 Official site
Monthly active users50,000 users / mo…in Hobby: Up to 3 dashboard seats Unlimited applications 50,000 MRU limit per app Up to 5 user impersonations APIs and… Data retention1 day…domain Fixed, 7 day session lifetime Application Logs 1 day retention Machine Authentication API Keys & M2M… Team members3…Start building for free Included in Hobby: Up to 3 dashboard seats Unlimited applications 50,000 MRU limit… Quoted from clerk.com/pricing, checked Oct 22, 2026.
Auth0 +2 more in Evidence	25K	1	not published	3	auth0.comchecked Oct 23 Official site
Custom domains1…\| Included \| Included \| Included \| Custom Domains* \| 1 \| 1 \| 1 \| 20 +ADD-ON \| Email Workflow \| Not included \|… M2M tokens1,000 tokens / mo…Tiers Available \| Machine-to-Machine Authentication \| 1,000 \| 1,000 \| 5,000 \| 5,000 \| M2M Add-on \| No \| No \| Yes \|… Monthly active users25,000 users / mo…card needed to sign up. Start building for free Up to 25,000 monthly active users Includes 1 Custom Domain* Secure… Data retention1 day…Not included \| Not included \| Included \| Log Retention \| 1 Day \| 5 Days \| 10 Days \| 30 Days \| Log Streaming \| \| 1… Team members3…1 \| 3 \| 12 \| Unlimited \| Number of Admin/Contributors \| 3 \| Unlimited \| Unlimited \| Unlimited \| Admin Access… Quoted from auth0.com/pricing, checked Oct 23, 2026.
Kinde +1 more in Evidence	10.5K	1	2,000	not published	kinde.comchecked Oct 23 Official site
M2M tokens2,000…Free plan \| Pro plan \| Plus plan \| Scale plan M2M tokens 2,000 included free 5,000 included free $0.001 per extra token… Monthly active users10,500 users / mo…No setup fees, monthly fees, or hidden fees. $0 forever 10,500 monthly active users (MAU)No credit card required Start… Data retention1 day…included Not included Not included Included Audit logs 1 day 7 days 14 days 30 days Just-in-time user provisioning… Fee per payment0.7%…plan \| Scale plan Platform fee per customer transaction 0.7% 0.7% 0.6% 0.5% Custom billing plans Supports B2C, B2B,… Quoted from kinde.com/pricing, checked Oct 23, 2026.
Amazon Cognito	10K	not published	not published	not published	pricing.us-east-1.amazonaws.comchecked Oct 23 Official site
Monthly active users10,000 users / mo…10000… Quoted from pricing.us-east-1.amazonaws.com/offers/v1.0/aws/AmazonCognito/current/us-east-1/index.json, checked Oct 23, 2026.
Stytch	10K	not published	1,000	not published	stytch.comchecked Oct 22 Official site
M2M tokens1,000…AI agents Unlimited Organizations 5 SSO or SCIM Connections 1,000 M2M Tokens Full suite of authn and authz features --… Monthly active users10,000 users / mo…Pay as you go Starting at: $0 /Month Always free: 10,000 monthly active users and AI agents Unlimited… Quoted from stytch.com/pricing, checked Oct 22, 2026.
Descope +1 more in Evidence	7,500	7	10K	not published	descope.comchecked Oct 22 Official site
Emails per day1,000 emails / day…Unlimited Unlimited Email delivery with Descope Up to 1,000 per day Up to 10,000 per day Up to 10,000 per day Up to… M2M tokens10,000…3 SSO connections 1 Federated app (OIDC) 5 Test users 10,000 M2M exchanges 2,000 Monthly active consents (MACs) 2,000… Monthly active users7,500 users / mo…Upgrade required to exceed limits. What’s included: 7,500 Monthly active users (MAUs) 10 Monthly active tenants 3… Data retention7 days…Descope UI + external connectors Audit Retention 1 week 1 month Add-on available 1 month Add-on available… Quoted from descope.com/pricing, checked Oct 22, 2026.
Frontegg	7,500	not published	not published	not published	frontegg.comchecked Oct 22 Official site
Monthly active users7,500 users / mo…for free Always included Fully Customized Hosted Login 7,500 Monthly Active Users 5 Enterprise Connections (SSO/SCIM)… Quoted from frontegg.com/pricing, checked Oct 22, 2026.

AUSign-in and users: free tiers side by side

Sign-in and users: free tiers side by side