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Lightweight open-source auth with full developer control
Overall score
76/100
Verdict
Good
Pricing
Free
Performance radar — Lucia
Score breakdown
Developer UX
SDK quality, documentation, and quickstart speed.
Source: RadarTrek research
Security
MFA, passkeys, breach detection, and compliance certs.
Source: RadarTrek research
Free Tier
Generosity of free plan — MAU limit and features included.
Source: RadarTrek research
Feature Set
Social login, SSO, magic links, passwordless support, roles.
Source: RadarTrek research
Performance
Token validation latency and uptime SLA.
Source: RadarTrek research
Support
Documentation quality and paid support options.
Source: RadarTrek research
Lucia is a minimal auth library that gives developers full control over auth logic without opinion. Works with any framework and any database. Best for developers who want to own their auth implementation.
In our independent evaluation across 6 scored dimensions, Lucia earns an overall score of 76/100 — a strong result in the auth providers category. The platform is available including a permanently free tier, accessible to teams at any budget level. The score of 76 places it in the good tier of our auth providers rankings, where we assess tools on criteria that matter to builders: developer ux, security, free tier, and more.
Lucia scores highest on Free Tier (100/100) and Performance (82/100), placing it among the stronger performers in those areas within the auth providers category. The dimensions with the most room for improvement are Support (60/100) and Feature Set (65/100) — teams who weight these criteria most heavily should compare Lucia carefully against alternatives before committing. The free entry point makes it easy to validate Lucia before committing to a paid plan — a practical advantage when evaluating a new tool category. Our recommendation: Lucia is worth a serious evaluation for teams that prioritise free tier — use the radar chart and dimension breakdown on this page to see at a glance whether its profile matches your priorities.
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Yes — Lucia is free to use with no trial period or credit card required. It offers a permanently free tier, though paid plans with higher limits or additional features are typically available. Check the official pricing page for current plan details.
Lucia scores highest on Free Tier in our independent assessment — 100/100, placing it among the stronger performers in this dimension within the auth providers category. Generosity of free plan — MAU limit and features included.. Teams who count free tier as a primary criterion should put Lucia high on their evaluation list.
The lowest-scoring dimension for Lucia in our testing is Support (60/100). This does not make it the wrong choice — if support is not a priority for your use case, the gap is irrelevant. But teams who weight support most heavily should compare Lucia carefully against alternatives before committing, using the radar chart on this page to see the full profile at a glance.
Lucia earns an overall RadarTrek score of 76/100 — a strong result in the auth providers category. Scores above 75 indicate a tool that performs well across most dimensions without a critical weakness. At 76/100, Lucia is a reliable choice for most teams evaluating this space. Scores are reviewed when significant updates are released, so the number reflects the current version of the product.
The best alternative to Lucia depends on which dimension matters most to you. Use the "Compare with" links in the sidebar to see a head-to-head radar chart against any specific competitor in the auth providers category. The main auth providers category page ranks all tools by overall score and lets you filter by dimension to find alternatives that lead on your priority criterion.
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