LMArena vs micro1
Which Evaluation AI tool is better in 2026?
LMArena
Crowdsourced leaderboard for ranking AI models
micro1
Human intelligence infrastructure for high-quality AI training data
Side-by-side
LMArena is the more established option (raised $250M); pricing is comparable on both sides.
| Metric | LMArena | micro1 |
|---|---|---|
| Taglinei | Crowdsourced leaderboard for ranking AI models | Human intelligence infrastructure for high-quality AI training data |
| Foundedi | 2025 | 2023🏆 |
| HQi | Berkeley, United States | Palo Alto, US |
| Employeesi | — | 51-200🏆 |
| Neuron scorei | 73🏆 | 58 |
| Total fundingi | $250M🏆 | $35M |
| Latest roundi | Series A · Jan 2026 | Series A · Feb 2026 |
| Valuationi | $1.7B🏆 | $500M |
| 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 | Enterprise · Contact sales |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for LMArena and micro1.
| Capability | LMArena | micro1 |
|---|---|---|
| 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 $35M)
- Higher Neuron score (73 vs 58)
- Offers a free plan
- Offers a free trial
🔵 Strengths of micro1
- More mature (2023)
Which should you choose?
Choose micro1 if price matters most — it starts at Enterprise · Contact sales, 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 micro1 — which is better?
It depends on your priority. LMArena has raised more capital and is the more established option; micro1 has broader feature depth. See the side-by-side table above.
Is LMArena cheaper than micro1?
No — micro1's cheapest paid plan is Enterprise · Contact sales, while LMArena's is Free.
Do LMArena and micro1 offer free plans?
LMArena: Yes, has a free plan. micro1: Paid only.
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