Circu Li-ion vs KoBold Metals
Which Climate AI tool is better in 2026?
Circu Li-ion
KoBold Metals
AI-powered exploration for critical minerals
Side-by-side
KoBold Metals leads on both fronts — more capital raised ($1.2B) and a lower entry price than Circu Li-ion.
| Metric | Circu Li-ion | KoBold Metals |
|---|---|---|
| Taglinei | — | AI-powered exploration for critical minerals |
| Foundedi | 2021 | 2018🏆 |
| HQi | — | Berkeley, US |
| Employeesi | 11-50 | 201-500🏆 |
| Neuron scorei | 62 | 84🏆 |
| Total fundingi | $24M | $1.2B🏆 |
| Latest roundi | Series A | Series C Extension · Oct 2025 |
| Valuationi | — | $4.4B🏆 |
| 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 Circu Li-ion and KoBold Metals.
| Capability | Circu Li-ion | KoBold Metals |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Circu Li-ion
- Offers a free plan
- Offers a free trial
- Newer company (2021)
🔵 Strengths of KoBold Metals
- Has raised more capital ($1.2B vs $24M)
- Higher Neuron score (84 vs 62)
- More mature (2018)
Which should you choose?
Choose KoBold Metals if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Climate tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose KoBold Metals if you want the most established option — it has raised $1.2B, 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
Circu Li-ion vs KoBold Metals — which is better?
It depends on your priority. Circu Li-ion is the leaner option; KoBold Metals is cheaper to start. See the side-by-side table above.
Is Circu Li-ion cheaper than KoBold Metals?
No — KoBold Metals's cheapest paid plan is Enterprise · Contact sales, while Circu Li-ion's is Free.
Do Circu Li-ion and KoBold Metals offer free plans?
Circu Li-ion: Yes, has a free plan. KoBold Metals: Paid only.
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