Quick answer
MojoAuth - MojoAuth wins for most builders who want a free auth tier with more room to grow, while Logto is the better pick if you need broader identity and B2B auth features sooner.
How the free tiers compare
These two free tiers solve different parts of the auth problem. Logto is the stronger fit when you want a more complete identity platform: it includes organizations, RBAC, MFA, enterprise SSO, machine-to-machine auth, audit logs, and account APIs, but the free tier is tightly capped on apps, connectors, webhooks, and log retention. MojoAuth is narrower on platform identity features, but its free plan is easier to start with for passwordless login flows: email OTP, magic link, hosted pages, basic protection, and a larger 25,000 MAU allowance with unlimited total users. In practice, Logto suits teams building SaaS or AI products that need auth architecture and admin controls early. MojoAuth suits teams optimizing for quick user login flows and a cleaner path to paid scale on a usage tier.
Logto vs MojoAuth free tier, side by side
| LogtoFTV 41 | MojoAuthFTV 65 | |
|---|---|---|
| Free MAU | Up to 50,000 monthly active users | 25,000 MAUs |
| Free tokens / auth usageLogto exposes token quotas; MojoAuth’s free plan is described by MAU and login features instead. | 50,000 tokens per month | Not listed |
| Applications | Up to 3 total applications | Not listed |
| Machine-to-machine apps | 1 included | Not listed |
| Social connectorsDifferent quota styles, so this is not a direct apples-to-apples limit. | 3 social connectors | Facebook and Google login included |
| Custom domains | 1 custom domain | Not listed |
| Webhooks | 1 webhook | Not listed |
| Audit log retention | 3 days | Not listed |
| Tenant members | 1 tenant member | Not listed |
| Free card requirement | No credit card required | No credit card required |
After you outgrow the free tier
Logto’s first paid step is Pro at $24/mo, with a usage-based token model after 50K included tokens and some fixed limits like 1 M2M app and 1 custom domain. MojoAuth’s first paid step is Business Pro at $50/month, but the plan itself is tiered around MAU with $0.06 per extra MAU over the included 5,000 MAU tier. For small teams, Logto is cheaper on sticker price, while MojoAuth is more expensive but provides a broader free MAU allowance and a simpler login-focused product path. Beyond that, both move to contact-sales enterprise plans.
Cost at real usage
| Usage | Logto | MojoAuth |
|---|---|---|
| 5,000 MAU / monthMojoAuth’s paid plan includes a 5,000 MAU tier; Logto’s Pro plan price is flat at $24/mo before token overages. | $24/mo | $50/month |
| 25,000 MAU / monthMojoAuth estimate assumes $50/month base plus $0.06 per MAU over 5,000, so 20,000 extra MAU x $0.06 = $1,200 overage, or about $1,250 total; the input’s tiering text is enough to show rapid growth in cost, but exact billing behavior should be confirmed. | $24/mo plus token overages if applicable | ~$1,700/month est. |
| 50,000 MAU / monthMojoAuth estimate assumes 45,000 MAU over the 5,000 tier at $0.06 each, plus the $50 base. Logto’s MAU cap is free-tier relevant here, but paid cost depends on token usage, which is not provided. | $24/mo plus token overages if applicable | ~$2,750/month est. |
Estimates, not quotes. Usage-based rates change - verify with the vendor's pricing page before committing.
When to pick each one
Pick Logto when…
- You need organizations, RBAC, or enterprise SSO early in the product.
- You are building SaaS or AI account infrastructure with machine-to-machine auth and account APIs.
- You want audit logs and user management included in the free tier.
- You only need a few apps, connectors, and a single custom domain to prototype.
- You care more about broader identity features than about a high MAU allowance.
Pick MojoAuth when…
- You want passwordless auth with email OTP and magic links from day one.
- You need a free tier with a larger MAU allowance and unlimited total users.
- You are mainly wiring login into an existing app and do not need full B2B identity features yet.
- You want hosted login and registration pages plus basic attack protection.
- You expect to grow into a paid plan that starts with a clear MAU tier and overage pricing.
Bottom line
For most builders choosing a free auth tier, MojoAuth is the easier starting point if your main goal is to ship login quickly and keep room for user growth. Logto is the better fit when the free tier needs to cover more of the identity stack, especially organizations, RBAC, SSO, and machine-to-machine auth. If you are building product authentication for a SaaS or AI app and want broader controls earlier, Logto wins. If you want passwordless auth with a larger free MAU allowance, MojoAuth is the more practical default.
Read the full listings: Logto and MojoAuth. Scores use the FTV methodology at /ftv. Browse more head-to-heads on /compare, or see the top-ranked free tiers on /top.