Periodic Labs vs Undermind
Which Research Assistants AI tool is better in 2026?
Periodic Labs
Creating AI scientists and autonomous laboratories to accelerate scientific discovery, starting with physical sciences.
Undermind
AI agent that runs exhaustive literature searches across scientific papers
Side-by-side
Periodic Labs is the more established option (raised $300M), but Undermind is cheaper to start.
| Metric | Periodic Labs | Undermind |
|---|---|---|
| Taglinei | Creating AI scientists and autonomous laboratories to accelerate scientific discovery, starting with physical sciences. | AI agent that runs exhaustive literature searches across scientific papers |
| Foundedi | 2025 | 2023🏆 |
| HQi | US | San Francisco, United States |
| Employeesi | 11-50 | 1-10🏆 |
| Neuron scorei | 64🏆 | 32 |
| Total fundingi | $300M🏆 | Undisclosed |
| Latest roundi | Seed · Sep 2025 | — |
| 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 | Enterprise · Contact sales | Free · From $15/mo |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Periodic Labs and Undermind.
| Capability | Periodic Labs | Undermind |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✓ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Periodic Labs
- Has raised more capital ($300M vs Undisclosed)
- Higher Neuron score (64 vs 32)
- Newer company (2025)
🔵 Strengths of Undermind
- Offers a free plan
- Lower starting price ($15/mo)
- More mature (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 Research Assistants tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Periodic Labs if you want the most established option — it has raised $300M, 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
Periodic Labs vs Undermind — which is better?
It depends on your priority. Periodic Labs has raised more capital and is the more established option; Undermind is cheaper to start. See the side-by-side table above.
Is Periodic Labs cheaper than Undermind?
No — Undermind's cheapest paid plan is Free · From $15/mo, while Periodic Labs's is Enterprise · Contact sales.
Do Periodic Labs and Undermind offer free plans?
Periodic Labs: Paid only. Undermind: Yes, has a free plan.
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