Mainframe vs Notion AI
Which Agents AI tool is better in 2026?
Mainframe
Building interfaces for the future where operating systems are built around actions, not apps, powered by AI.
Notion AI
Connected AI workspace
Side-by-side
Notion AI leads on both fronts — more capital raised ($270M) and a lower entry price than Mainframe.
| Metric | Mainframe | Notion AI |
|---|---|---|
| Taglinei | Building interfaces for the future where operating systems are built around actions, not apps, powered by AI. | Connected AI workspace |
| Foundedi | 2026 | 2013🏆 |
| HQi | — | San Francisco, US |
| Employeesi | 1-10 | 501-1000🏆 |
| Neuron scorei | 59 | 71🏆 |
| Total fundingi | Undisclosed | $270M🏆 |
| Latest roundi | — | Secondary · Jan 2026 |
| Valuationi | — | $11B🏆 |
| Cheapest paid plani | Pro · $20/mo | Plus · $10/mo🏆 |
| Free plani | ✓ Starter | ✓ Free |
| Free triali | ✓ | ✓ |
| Top tier pricei | Pro · $20/mo | Business · $20/mo |
| Pricing summaryi | 2 published plans | 4 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Mainframe and Notion AI.
| Capability | Mainframe | Notion AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 1 (JavaScript) |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✓ |
| Verified | ✗ | ✓ |
| Active deal | ✗ | ✓ |
🟢 Strengths of Mainframe
- Newer company (2026)
🔵 Strengths of Notion AI
- Has raised more capital ($270M vs Undisclosed)
- Higher Neuron score (71 vs 59)
- More mature (2013)
- Verified profile
Which should you choose?
Choose Mainframe if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Agents tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Notion AI if you want the most established option — it has raised $270M, 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.
💸 Deals
Notion + Notion AI free for students
Verified students and educators get Notion Plus with Notion AI free — same plan companies pay for.
Terms: Requires .edu email verification.
Frequently asked questions
Mainframe vs Notion AI — which is better?
It depends on your priority. Mainframe is the leaner option; Notion AI is cheaper to start. See the side-by-side table above.
Is Mainframe cheaper than Notion AI?
No — Notion AI's cheapest paid plan is Plus · $10/mo, while Mainframe's is Pro · $20/mo.
Do Mainframe and Notion AI offer free plans?
Mainframe: Yes, has a free plan. Notion AI: Yes, has a free plan.
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