Mainframe vs Rebolt
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.
Rebolt
AI software factory for company operations
Side-by-side
Rebolt is the more established option (raised $4M), but Mainframe is cheaper to start.
| Metric | Mainframe | Rebolt |
|---|---|---|
| Taglinei | Building interfaces for the future where operating systems are built around actions, not apps, powered by AI. | AI software factory for company operations |
| Foundedi | 2026 | 2024🏆 |
| HQi | — | San Francisco, United States |
| Employeesi | 1-10 | 10🏆 |
| Neuron scorei | 32 | 65🏆 |
| Total fundingi | Undisclosed | $4M🏆 |
| Latest roundi | — | Seed · Mar 2025 |
| Valuationi | — | — |
| Cheapest paid plani | Pro · $20/mo🏆 | Pricing not disclosed |
| Free plani | ✓ Starter | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Pro · $20/mo | Pricing not disclosed |
| Pricing summaryi | 2 published plans | Custom |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Mainframe and Rebolt.
| Capability | Mainframe | Rebolt |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✓ |
| SDK languages | — | — |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Mainframe
- Offers a free plan
- Offers a free trial
- Newer company (2026)
🔵 Strengths of Rebolt
- Has raised more capital ($4M vs Undisclosed)
- Higher Neuron score (65 vs 32)
- More mature (2024)
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 Rebolt if you want the most established option — it has raised $4M, 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
Mainframe vs Rebolt — which is better?
It depends on your priority. Mainframe is the leaner option; Rebolt has broader feature depth. See the side-by-side table above.
Is Mainframe cheaper than Rebolt?
Yes — Mainframe's cheapest paid plan is Pro · $20/mo, while Rebolt's is Custom.
Do Mainframe and Rebolt offer free plans?
Mainframe: Yes, has a free plan. Rebolt: Paid only.
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