Harvey vs Mainframe
Which Productivity AI tool is better in 2026?
Harvey
The AI platform for elite law firms.
Mainframe
Building interfaces for the future where operating systems are built around actions, not apps, powered by AI.
Side-by-side
| Harvey | Mainframe | |
|---|---|---|
| Tagline | The AI platform for elite law firms. | Building interfaces for the future where operating systems are built around actions, not apps, powered by AI. |
| Founded | 2022 | 2026 |
| HQ | San Francisco, US | — |
| Employees | 201-500 | 1-10 |
| Total funding | $1.5B | Undisclosed |
| Latest round | Series F · Mar 2026 | — |
| Valuation | $11B | — |
| Cheapest paid plan | — | Pricing not disclosed |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Top tier price | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summary | 1 published plans | Enterprise · Contact sales |
| Categories |
Capability matrix
Developer-facing capabilities and access signals for Harvey and Mainframe.
| Capability | Harvey | Mainframe |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Harvey
- Has raised more capital ($1.5B vs Undisclosed)
- Higher Neuron score (78 vs 28)
- More mature (2022)
🔵 Strengths of Mainframe
- Newer company (2026)
Which should you choose?
Choose Harvey if price matters most — it starts at Paid, which is friendlier for teams watching burn. Both AI Productivity 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 $1.5B, 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 Mainframe — which is better?
It depends on your priority. Harvey has raised more capital and is the more established option; Mainframe has broader feature depth. See the side-by-side table above.
Is Harvey cheaper than Mainframe?
Yes — Harvey's cheapest paid plan is Paid, while Mainframe's is Enterprise · Contact sales.
Do Harvey and Mainframe offer free plans?
Harvey: Paid only. Mainframe: Paid only.
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