Celestial AI vs Zilliz
Which Infrastructure AI tool is better in 2026?
Celestial AI
Photonic Fabric optical interconnect for AI infrastructure
Zilliz
Fully managed vector database for AI, built by the creators of Milvus
Side-by-side
Celestial AI is the more established option (raised $515M), but Zilliz is cheaper to start.
| Metric | Celestial AI | Zilliz |
|---|---|---|
| Taglinei | Photonic Fabric optical interconnect for AI infrastructure | Fully managed vector database for AI, built by the creators of Milvus |
| Foundedi | 2020 | 2017🏆 |
| HQi | Santa Clara, United States | Redwood City, United States |
| Employeesi | — | 200🏆 |
| Neuron scorei | 77🏆 | 75 |
| Total fundingi | $515M🏆 | $113M |
| Latest roundi | Series C1 · Mar 2025 | series_b · Aug 2022 |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed🏆 |
| Free plani | ✗ | ✓ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Custom | Free |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Celestial AI and Zilliz.
| Capability | Celestial AI | Zilliz |
|---|---|---|
| MCP support | ✗ | ✓ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 5 (Python, Node.js, Go, Java…) |
| Free plan | ✗ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Celestial AI
- Has raised more capital ($515M vs $113M)
- Higher Neuron score (77 vs 75)
- Newer company (2020)
🔵 Strengths of Zilliz
- Offers a free plan
- Offers a free trial
- More mature (2017)
Which should you choose?
Choose Zilliz if price matters most — it starts at Free, 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 Zilliz — which is better?
It depends on your priority. Celestial AI has raised more capital and is the more established option; Zilliz is cheaper to start. See the side-by-side table above.
Is Celestial AI cheaper than Zilliz?
No — Zilliz's cheapest paid plan is Free, while Celestial AI's is Custom.
Do Celestial AI and Zilliz offer free plans?
Celestial AI: Paid only. Zilliz: Yes, has a free plan.
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