Braintrust vs Thinking Machines Lab
Which Developer Tools AI tool is better in 2026?
Braintrust
The AI observability platform for building quality AI products at scale.
Thinking Machines Lab
Frontier AI research lab building customizable, multimodal models
Side-by-side
Thinking Machines Lab leads on both fronts — more capital raised ($2B) and a lower entry price than Braintrust.
| Metric | Braintrust | Thinking Machines Lab |
|---|---|---|
| Taglinei | The AI observability platform for building quality AI products at scale. | Frontier AI research lab building customizable, multimodal models |
| Foundedi | 2023🏆 | 2025 |
| HQi | US | San Francisco, US |
| Employeesi | — | 11-50🏆 |
| Neuron scorei | 68 | 90🏆 |
| Total fundingi | $80M | $2B🏆 |
| Latest roundi | Series B · Feb 2026 | Seed · Jul 2025 |
| Valuationi | $800M | $12B🏆 |
| Cheapest paid plani | — | Pricing not disclosed🏆 |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 1 published plans | Usage |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Braintrust and Thinking Machines Lab.
| Capability | Braintrust | Thinking Machines Lab |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 1 (python) |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Braintrust
- More mature (2023)
🔵 Strengths of Thinking Machines Lab
- Has raised more capital ($2B vs $80M)
- Higher Neuron score (90 vs 68)
- Newer company (2025)
Which should you choose?
Choose Thinking Machines Lab if price matters most — it starts at Usage, which is friendlier for teams watching burn. Both AI Developer Tools tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Thinking Machines Lab if you want the most established option — it has raised $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
Braintrust vs Thinking Machines Lab — which is better?
It depends on your priority. Braintrust is the leaner option; Thinking Machines Lab is cheaper to start. See the side-by-side table above.
Is Braintrust cheaper than Thinking Machines Lab?
No — Thinking Machines Lab's cheapest paid plan is Usage, while Braintrust's is Enterprise · Contact sales.
Do Braintrust and Thinking Machines Lab offer free plans?
Braintrust: Paid only. Thinking Machines Lab: Paid only.
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