LMArena vs RagaAI
Which Evaluation AI tool is better in 2026?
LMArena
Crowdsourced leaderboard for ranking AI models
RagaAI
AI testing and safety platform that automatically detects, diagnoses, and helps fix issues
Side-by-side
LMArena is the more established option (raised $250M); pricing is comparable on both sides.
| Metric | LMArena | RagaAI |
|---|---|---|
| Taglinei | Crowdsourced leaderboard for ranking AI models | AI testing and safety platform that automatically detects, diagnoses, and helps fix issues |
| Foundedi | 2025 | 2023🏆 |
| HQi | Berkeley, United States | — |
| Employeesi | — | 11-50🏆 |
| Neuron scorei | 73🏆 | 47 |
| Total fundingi | $250M🏆 | $4.7M |
| Latest roundi | Series A · Jan 2026 | Seed |
| Valuationi | $1.7B🏆 | — |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed |
| Free plani | ✓ | ✓ |
| Free triali | ✓ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Free | Free |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for LMArena and RagaAI.
| Capability | LMArena | RagaAI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of LMArena
- Has raised more capital ($250M vs $4.7M)
- Higher Neuron score (73 vs 47)
- Newer company (2025)
🔵 Strengths of RagaAI
- More mature (2023)
Which should you choose?
Choose RagaAI if price matters most — it starts at Free, which is friendlier for teams watching burn. Both AI Evaluation tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose LMArena if you want the most established option — it has raised $250M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
LMArena vs RagaAI — which is better?
It depends on your priority. LMArena has raised more capital and is the more established option; RagaAI has broader feature depth. See the side-by-side table above.
Is LMArena cheaper than RagaAI?
No — RagaAI's cheapest paid plan is Free, while LMArena's is Free.
Do LMArena and RagaAI offer free plans?
LMArena: Yes, has a free plan. RagaAI: Yes, has a free plan.
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