Harvey vs Not Diamond
Which Developer Tools AI tool is better in 2026?
Harvey
The AI platform for elite law firms.
Not Diamond
Data-driven recommendation and routing layer that sends each prompt to the best AI model
Side-by-side
Harvey leads on both fronts — more capital raised ($1.7B) and a lower entry price than Not Diamond.
| Metric | Harvey | Not Diamond |
|---|---|---|
| Taglinei | The AI platform for elite law firms. | Data-driven recommendation and routing layer that sends each prompt to the best AI model |
| Foundedi | 2022🏆 | — |
| HQi | San Francisco, US | San Francisco, United States |
| Employeesi | 201-500🏆 | — |
| Neuron scorei | 81🏆 | 64 |
| Total fundingi | $1.7B🏆 | $2.3M |
| Latest roundi | Growth · Mar 2026 | Pre-Seed · Jul 2024 |
| Valuationi | $11B🏆 | — |
| Cheapest paid plani | —🏆 | Pricing not disclosed |
| Free plani | ✗ | ✓ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 1 published plans | Free |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Harvey and Not Diamond.
| Capability | Harvey | Not Diamond |
|---|---|---|
| MCP support | ✓ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Harvey
- Has raised more capital ($1.7B vs $2.3M)
- Higher Neuron score (81 vs 64)
- Newer company (2022)
🔵 Strengths of Not Diamond
- Offers a free plan
- Offers a free trial
Which should you choose?
Choose Harvey if price matters most — it starts at Paid, 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 Harvey if you want the most established option — it has raised $1.7B, 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
Harvey vs Not Diamond — which is better?
It depends on your priority. Harvey has raised more capital and is the more established option; Not Diamond has broader feature depth. See the side-by-side table above.
Is Harvey cheaper than Not Diamond?
Yes — Harvey's cheapest paid plan is Paid, while Not Diamond's is Free.
Do Harvey and Not Diamond offer free plans?
Harvey: Paid only. Not Diamond: Yes, has a free plan.
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