Celestial AI vs Indexable
Which Infrastructure AI tool is better in 2026?
Celestial AI
Photonic Fabric optical interconnect for AI infrastructure
Indexable
Sandbox infrastructure for AI agents with millisecond full-environment forks.
Side-by-side
Celestial AI is the more established option (raised $515M), but Indexable is cheaper to start.
| Metric | Celestial AI | Indexable |
|---|---|---|
| Taglinei | Photonic Fabric optical interconnect for AI infrastructure | Sandbox infrastructure for AI agents with millisecond full-environment forks. |
| Foundedi | 2020🏆 | 2026 |
| HQi | Santa Clara, United States | San Francisco, US |
| Employeesi | — | 1-10🏆 |
| Neuron scorei | 77🏆 | 49 |
| Total fundingi | $515M🏆 | $500K |
| Latest roundi | Series C1 · Mar 2025 | Seed · Mar 2026 |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | —🏆 |
| Free plani | ✗ | ✗ |
| 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 Indexable.
| Capability | Celestial AI | Indexable |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Celestial AI
- Has raised more capital ($515M vs $500K)
- Higher Neuron score (77 vs 49)
- More mature (2020)
🔵 Strengths of Indexable
- Newer company (2026)
Which should you choose?
Choose Indexable if price matters most — it starts at Usage-based, 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 Indexable — which is better?
It depends on your priority. Celestial AI has raised more capital and is the more established option; Indexable is cheaper to start. See the side-by-side table above.
Is Celestial AI cheaper than Indexable?
No — Indexable's cheapest paid plan is Usage-based, while Celestial AI's is Custom.
Do Celestial AI and Indexable offer free plans?
Celestial AI: Paid only. Indexable: Paid only.
Explore more AI Infrastructure tools
Contextual paths to related AI startups, deals and rankings.