Harvey vs Weights & Biases
Which Developer Tools AI tool is better in 2026?
Harvey
The AI platform for elite law firms.
Weights & Biases
The AI developer platform
Side-by-side
Harvey leads on both fronts — more capital raised ($2.3B) and a lower entry price than Weights & Biases.
| Metric | Harvey | Weights & Biases |
|---|---|---|
| Taglinei | The AI platform for elite law firms. | The AI developer platform |
| Foundedi | 2022 | 2018🏆 |
| HQi | San Francisco, US | San Francisco, US |
| Employeesi | 201-500 | 500-1000🏆 |
| Neuron scorei | 78🏆 | 50 |
| Total fundingi | $2.3B🏆 | $245M |
| Latest roundi | series-h · Sep 2026 | Series C · Oct 2023 |
| Valuationi | $11B🏆 | $1B |
| Cheapest paid plani | —🏆 | — |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Enterprise · Contact sales | Enterprise · Contact sales |
| Pricing summaryi | 1 published plans | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Harvey and Weights & Biases.
| Capability | Harvey | Weights & Biases |
|---|---|---|
| MCP support | ✓ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 1 (Python) |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✓ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Harvey
- Has raised more capital ($2.3B vs $245M)
- Higher Neuron score (78 vs 50)
- Newer company (2022)
🔵 Strengths of Weights & Biases
- More mature (2018)
- Verified profile
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 $2.3B, 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 Weights & Biases — which is better?
It depends on your priority. Harvey has raised more capital and is the more established option; Weights & Biases has broader feature depth. See the side-by-side table above.
Is Harvey cheaper than Weights & Biases?
Yes — Harvey's cheapest paid plan is Paid, while Weights & Biases's is Enterprise · Contact sales.
Do Harvey and Weights & Biases offer free plans?
Harvey: Paid only. Weights & Biases: Paid only.
Explore more AI Developer Tools tools
Contextual paths to related AI startups, deals and rankings.