Clerk vs Split.io: Full Comparison (2026)
Pricing, features, scores, and a clear verdict on which one is right for you.
The bottom line
Clerk positions itself as "authentication built for modern react and next.js apps" 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 Clerk charges per mau while Split.io charges per seat — a meaningful difference for larger teams. Split.io (founded 2015) has had more time to build out its ecosystem and integrations, while Clerk (2021) tends to move faster on modern UX and newer workflows.
At a glance
| Clerk | Split.io | |
|---|---|---|
| Our score | 85/100 | 81/100 |
| Starting price | Free | Free |
| Free tier | Yes | Yes |
| Best for | Authentication built for modern React and Next.js apps | Feature flags plus experimentation |
Pricing comparison
Calculate your cost
Feature comparison
core
| Feature | Clerk | Split.io |
|---|---|---|
| Pre-built UI components | Yes | No |
| OAuth / OIDC | Yes | No |
| Social login | Yes | No |
| MFA | Yes | No |
| Passkeys | 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
Key capabilities you'd miss
Choosing Clerk means going without Feature flags, Targeting rules, Percentage rollouts (which Split.io offers). Choosing Split.io means losing Pre-built UI components, OAuth / OIDC, Social login. 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
Clerk (51-200 employees) has the engineering bench to ship features across many fronts but may iterate slower on individual requests. Split.io (201-500 employees) typically ships faster on its core product but may lag on peripheral features. Consider which matters more for your roadmap.
Choose Clerk if...
- You want a free tier to get started
- You value an intuitive, easy-to-use interface
- Getting strong value for money is a priority
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 Clerk or Split.io better?
Clerk scores 85/100 compared to Split.io's 81/100 on VendorVS. However, the best choice depends on your needs — Clerk excels at ease of use (10/10) while Split.io scores 7/10.
How much does Clerk cost compared to Split.io?
Clerk starts at free (free tier available). Split.io starts at free (free tier available). Clerk is the more affordable option.
Does Clerk or Split.io have a free plan?
Yes, both Clerk and Split.io offer free tiers, so you can try each before committing to a paid plan.
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