Auth0 vs Split.io: Full Comparison (2026)
Pricing, features, scores, and a clear verdict on which one is right for you.
The bottom line
Auth0 positions itself as "enterprise authentication and identity platform" while Split.io goes after "feature flags plus experimentation" — so the right pick depends on which problem you're actually solving. Both use freemium pricing, but Auth0 charges per mau while Split.io charges per seat — a meaningful difference for larger teams.
At a glance
| Auth0 | Split.io | |
|---|---|---|
| Our score | 79/100 | 81/100 |
| Starting price | Free | Free |
| Free tier | Yes | Yes |
| Best for | Enterprise authentication and identity platform | Feature flags plus experimentation |
Pricing comparison
Calculate your cost
Feature comparison
core
| Feature | Auth0 | Split.io |
|---|---|---|
| OAuth 2.0 / OIDC | Yes | No |
| Social login | Yes | No |
| MFA | Yes | No |
| Custom domains | Essentials+ | No |
| Passwordless | Yes | No |
| Feature flags | No | Yes |
| Targeting rules | No | Yes |
| Percentage rollouts | No | Yes |
| Kill switches | No | Yes |
| Multi-environment | No | Yes |
Ratings breakdown
What the data tells us
How costs scale
Auth0's pricing curve is steeper — the jump from its entry plan to its top tier is more dramatic than Split.io's. If you're a growing team, model the 12-month cost at your projected team size, not just today's. Split.io tends to stay more predictable as you add seats or usage.
Key capabilities you'd miss
Choosing Auth0 means going without Feature flags, Targeting rules, Percentage rollouts (which Split.io offers). Choosing Split.io means losing OAuth 2.0 / OIDC, Social login, MFA. These are the features that typically drive the final decision — check whether your workflow depends on any of them before committing.
What company size tells you
Split.io (201-500 employees) has the engineering bench to ship features across many fronts but may iterate slower on individual requests. Auth0 (1,000+ employees) typically ships faster on its core product but may lag on peripheral features. Consider which matters more for your roadmap.
Choose Auth0 if...
- You want a free tier to get started
- You value powerful features over simplicity
- You need enterprise-grade capabilities
Choose Split.io if...
- You want a free tier to get started
- You value powerful features over simplicity
- Getting strong value for money is a priority
Frequently asked questions
Is Auth0 or Split.io better?
Split.io scores 81/100 compared to Auth0's 79/100 on VendorVS. However, the best choice depends on your needs — Auth0 excels at ease of use (7/10) while Split.io scores 7/10.
How much does Auth0 cost compared to Split.io?
Auth0 starts at free (free tier available). Split.io starts at free (free tier available). Auth0 is the more affordable option.
Does Auth0 or Split.io have a free plan?
Yes, both Auth0 and Split.io offer free tiers, so you can try each before committing to a paid plan.
Related comparisons
See how Auth0 and Split.io compare to other developer tools tools.
Auth0vs
DatadogAuth0vs
New RelicAuth0vs
TwilioAuth0vs
GitLabAuth0vs
CircleCIAuth0vs
Terraform / HCP TerraformAuth0vs
PulumiAuth0vs
Contentful