Onyx vs Undermind
Which Search AI tool is better in 2026?
Onyx
Onyx, formerly Danswer, is an open-source enterprise AI search and assistant that connects to
Undermind
AI agent that runs exhaustive literature searches across scientific papers
Side-by-side
Onyx is the more established option (raised $10M), but Undermind is cheaper to start.
| Metric | Onyx | Undermind |
|---|---|---|
| Taglinei | Onyx, formerly Danswer, is an open-source enterprise AI search and assistant that connects to | AI agent that runs exhaustive literature searches across scientific papers |
| Foundedi | — | 2023🏆 |
| HQi | — | San Francisco, United States |
| Employeesi | 11-50🏆 | 1-10 |
| Neuron scorei | 72🏆 | 61 |
| Total fundingi | $10M🏆 | Undisclosed |
| Latest roundi | Seed | — |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | From $15/mo🏆 |
| Free plani | ✓ | ✓ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Free | Free · From $15/mo |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Onyx and Undermind.
| Capability | Onyx | Undermind |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Onyx
- Has raised more capital ($10M vs Undisclosed)
- Higher Neuron score (72 vs 61)
- Offers a free trial
🔵 Strengths of Undermind
- Lower starting price ($15/mo)
- Newer company (2023)
Which should you choose?
Choose Undermind if price matters most — it starts at Free · From $15/mo, which is friendlier for teams watching burn. Both AI Search tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Onyx if you want the most established option — it has raised $10M, 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
Onyx vs Undermind — which is better?
It depends on your priority. Onyx has raised more capital and is the more established option; Undermind is cheaper to start. See the side-by-side table above.
Is Onyx cheaper than Undermind?
No — Undermind's cheapest paid plan is Free · From $15/mo, while Onyx's is Free.
Do Onyx and Undermind offer free plans?
Onyx: Yes, has a free plan. Undermind: Yes, has a free plan.
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