Rebolt vs Vellum
Which Agents AI tool is better in 2026?
Rebolt
AI software factory for company operations
Vellum
An AI Assistant that adapts to how you work, acts before you ask, and is entirely yours to customize.
Side-by-side
Rebolt is the more established option (raised $4M); pricing is comparable on both sides.
| Metric | Rebolt | Vellum |
|---|---|---|
| Taglinei | AI software factory for company operations | An AI Assistant that adapts to how you work, acts before you ask, and is entirely yours to customize. |
| Foundedi | 2024🏆 | — |
| HQi | San Francisco, United States | US |
| Employeesi | 10🏆 | 1-10 |
| Neuron scorei | 65🏆 | 22 |
| Total fundingi | $4M🏆 | Undisclosed |
| Latest roundi | Seed · Mar 2025 | — |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | — |
| Free plani | ✗ | ✓ Free |
| Free triali | ✗ | ✓ |
| Top tier pricei | Pricing not disclosed | — |
| Pricing summaryi | Custom | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Rebolt and Vellum.
| Capability | Rebolt | Vellum |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✓ | ✗ |
| SDK languages | — | 1 (CLI) |
| Free plan | ✗ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Rebolt
- Has raised more capital ($4M vs Undisclosed)
- Higher Neuron score (65 vs 22)
- Newer company (2024)
🔵 Strengths of Vellum
- Offers a free plan
- Offers a free trial
Which should you choose?
Choose Vellum 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
Rebolt vs Vellum — which is better?
It depends on your priority. Rebolt has raised more capital and is the more established option; Vellum has broader feature depth. See the side-by-side table above.
Is Rebolt cheaper than Vellum?
No — Vellum's cheapest paid plan is Free, while Rebolt's is Custom.
Do Rebolt and Vellum offer free plans?
Rebolt: Paid only. Vellum: Yes, has a free plan.
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