Auth0 vs Fly.io: Pricing Comparison 2026
Side-by-side pricing comparison of Auth0 and Fly.io. See all plans, features, and costs at a glance.
Bottom line: Auth0 starts at $35/mo and Fly.io starts at Custom pricing. Compare all 7 pricing tiers side by side.
Last updated: March 16, 2026
Auth0 vs Fly.io: Quick Pricing Facts
| Feature | Auth0 | Fly.io |
|---|---|---|
| Starting Price | $35/mo | Custom pricing |
| Number of Plans | 4 | 3 |
| Free Tier | Yes | No |
| Pricing Model | usage-based | usage-based |
| Annual Discount | N/A | N/A |
Auth0 and Fly.io are both priced at $35/mo, making them equally accessible Dev Tools. Together they offer 7 pricing plans with 29 features compared, so the best choice comes down to which features match your needs.
Auth0 stands out with a free plan for getting started.
Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your Dev Tools needs.
| Pricing Plans |  Auth0 Try it free |  Fly.io Try it free |
|---|---|---|
| Tier 1 | Free $0/monthCheapest Includes
| Enterprise-Ready Custom pricing |
| Tier 2 | Essentials $35/monthCheapest $4 / year Includes
| Compliance Made Easy Custom pricing |
| Tier 3 | Professional $240/monthCheapest $28 / year Includes
| Are on the House Custom pricing |
| Tier 4 | Enterprise Custom pricing Includes
| — |
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What Reviewers Say
Fly.io
Auth0
Auth0 offers a free plan, offers 4 tiers vs 3.
Based on pricing data only. Review the full comparison below for your specific needs.
Best value: Auth0
Try Auth0 freeWhich Should You Choose?
Choose Auth0 if:
- •You need a free plan with Up to 25,000 monthly active users, 1 Custom Domain—Auth0 offers no-cost access with no credit card required
- •You need 4 pricing tiers for flexible team sizing—more options mean less overpaying for features you don't need
- •You want more features built-in—Auth0 offers 29 additional features across its plans
Choose Fly.io if:
- •You prioritize Fly.io's user experience and interface over price (both tools are similarly priced)
- •You prefer Fly.io's usage-based model with its 3-tier structure
- •You value Fly.io's specific feature progression from free to advanced tier levels
Auth0 offers a free plan [1], eliminating the cost barrier for evaluation, while Fly.io requires paid subscription from the start. This gives Auth0 a significant advantage for teams with budget constraints or extended trial periods. Once you outgrow Auth0's free tier, upgrading to a paid plan at approximately $35/mo provides substantial additional functionality. Compare this pricing path against Fly.io's tiering starting at Custom pricing to assess total cost of ownership over 12 months. Auth0's 4 tiers provide flexibility at different budgets, while Fly.io's 3 tiers structure may force you into higher-cost plans than necessary for your use case. If evaluation cost matters to your decision, Auth0 is the obvious starting point with zero financial commitment. Use the free tier to validate core functionality before committing to paid plans from either tool.
Frequently Asked Questions: Auth0 vs Fly.io
How many pricing plans does Auth0 have vs Fly.io?
Does Auth0 or Fly.io offer a free plan?
Can I save money by paying annually for Auth0 or Fly.io?
Does Auth0 or Fly.io offer custom enterprise pricing?
How do Auth0 and Fly.io compare for Dev Tools?
Sources
- Auth0 Official Pricing— Vendor pricing page
- Fly.io Official Pricing— Vendor pricing page
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