Comparison
Spellbook vs Undermind: which AI agent is better?
A side-by-side look at Spellbook and Undermind on quality, price, capabilities and trust. Scores measure observable public data; prices come from each vendor's own pricing page. Every fact is sourced and dated.
| Spellbook Spellbook | Undermind Undermind | |
|---|---|---|
| Agent Score | 35 | 53 |
| Entry price | On quote | $15/mo · free plan |
| Trust | ✓ VERIFIED | ✓ VERIFIED |
| Capabilities documented | 3 | 4 |
| Free plan | No | ✓ Yes |
| Free trial | ✓ Yes | ✓ Yes |
| Public API | — | — |
| MCP support | — | ✓ Yes |
| Open source | No | No |
| Last verified | 13 Oct 2026 | 13 Oct 2026 |
Score breakdown
| Component | Spellbook | Undermind |
|---|---|---|
| Capabilities | 38 | 50 |
| Integrations | Not measured | 25 |
| Documentation | Not measured | Not measured |
| Pricing clarity | 40 | 100 |
| Transparency | 100 | 100 |
| Freshness | 100 | 100 |
| Human oversight | Not measured | Not measured |
Choose Spellbook if…
On the measured criteria, Undermind leads — see opposite.
Choose Undermind if…
- You want a higher Agent Score (53 vs 35).
- You want a free plan to start.
- You want a free plan.
- You want more documented capabilities (4 vs 3).
- You want MCP support.
See the full picture: Spellbook · Undermind · all comparisons.