Best free Authentication for vibe coders
Summary
2 of 2 tracked Authentication tools have a free plan. Highest-scoring free option in our agent tests: Better Auth (8.2/10). 2 of these free options have been tested so far.
Free-tier limits are copied from each tool's pricing page on the date shown. "Free" means a $0 plan exists, not that it fits every project. Last updated:
Tools with a free plan
| Tool | Free tier (as published) | Agent score | Checked |
|---|---|---|---|
| Better Auth | Yes: open source; Infrastructure Starter free | 8.2 | 2026-10-16 |
| Clerk | Yes (Hobby): 50,000 monthly retained users/app | 8.1 | 2026-10-16 |
Full Authentication ranking · All free-tool guides · Methodology
Scores come from our own tests and are never for sale; sponsored placements are always labelled. We may use affiliate links in future. Disclosure