KeycloakManage user sign-in, single sign-on and application access from your own server.
100% free open-source (Apache-2.0). Unlimited monthly active users (MAUs).
Developer tools
Logto Cloud
Free optionOpen sourceBrowser
Add hosted sign-in and user accounts to a web application using Logto’s SDK.
What you can use it for
Add hosted sign-in and user accounts to a web application using Logto’s SDK.
- Integrate basic sign-in with a hosted production tenant and SDK.
- One custom domain and one webhook included.
Workflow coverage and comparison notes
A solo developer integrates hosted basic web-app login through an SDK in a Free production tenant. Excludes enterprise SSO, advanced authorization/security add-ons and a complete Auth0 user/session migration. Another hosted basic-login route with different user/token ceilings, rather than a claim that every Auth0 Free user needs to switch. Up to 25,000 MAU. Staying on Auth0 Free can be sufficient; paid plans add features and limits that Logto Free does not necessarily match. B2C Essentials: 35 USD/month. Displayed for up to 500 MAU; do not present this as the price for exceeding 25,000 free MAU or as equivalent advanced-feature coverage.
Before you switch
Access-token issuance and MAU are separate limits; token refresh can consume the token allowance. 50,000 MAU is not a guarantee for 50,000 frequently active users. Create a Free production tenant. Development tenants delete users after 90 days and are unsuitable for production. One console member; advanced roles, MFA/SSO and other add-ons require their own plan checks. Full Cloud/OSS migration is not self-service; data export requires contacting Logto. Hosted free route only; self-host operational costs and licence duties are not included in this recommendation. Official tenant documentation says full configuration/user migration between Cloud and OSS is not self-service; contact Logto for all-user export. Do not promise password-hash portability or one-click migration. Basic hosted auth under both caps. App hosting, owned domain registration and external email/SMS delivery can cost separately. No automatic cost estimate.
Alternatives to these paid apps
Each comparison covers the workflow described above, rather than every paid feature.
More for the same workflow
See alternatives →Keycloak
SuperTokensAdd account sign-in and session management to your application.
Free open-source self-hosted edition (Apache-2.0) or free cloud tier (up to 5,000 MAUs).
AuthentikManage application sign-in and single sign-on through your own identity provider.
100% free open-source (GPLv3). Unlimited users, applications, and directories.