Celestial AI vs E2B
Which Infrastructure AI tool is better in 2026?
Celestial AI
Photonic Fabric optical interconnect for AI infrastructure
E2B
The Enterprise AI Agent Cloud provides open-source, secure environments with real-world tools for enterprise-grade AI agents.
Side-by-side
Celestial AI is the more established option (raised $515M), but E2B is cheaper to start.
| Metric | Celestial AI | E2B |
|---|---|---|
| Taglinei | Photonic Fabric optical interconnect for AI infrastructure | The Enterprise AI Agent Cloud provides open-source, secure environments with real-world tools for enterprise-grade AI agents. |
| Foundedi | 2020🏆 | — |
| HQi | Santa Clara, United States | — |
| Employeesi | — | — |
| Neuron scorei | 77🏆 | 18 |
| Total fundingi | $515M🏆 | Undisclosed |
| Latest roundi | Series C1 · 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 Celestial AI and E2B.
| Capability | Celestial AI | E2B |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 3 (Python, JavaScript, TypeScript) |
| Free plan | ✗ | ✓ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Celestial AI
- Has raised more capital ($515M vs Undisclosed)
- Higher Neuron score (77 vs 18)
- Newer company (2020)
🔵 Strengths of E2B
- Offers a free plan
- Lower starting price ($150/mo)
Which should you choose?
Choose E2B if price matters most — it starts at Free · From $150/mo, which is friendlier for teams watching burn. Both AI Infrastructure tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Celestial AI if you want the most established option — it has raised $515M, 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
Celestial AI vs E2B — which is better?
It depends on your priority. Celestial AI has raised more capital and is the more established option; E2B is cheaper to start. See the side-by-side table above.
Is Celestial AI cheaper than E2B?
No — E2B's cheapest paid plan is Free, while Celestial AI's is Custom.
Do Celestial AI and E2B offer free plans?
Celestial AI: Paid only. E2B: Yes, has a free plan.
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