CopilotKit vs VAST Data
Which Developer Tools AI tool is better in 2026?
CopilotKit
Open-source framework for building in-app AI copilots and agentic UIs
VAST Data
Unifying software layer for AI infrastructure
Side-by-side
VAST Data is the more established option (raised $2.4B); pricing is comparable on both sides.
| Metric | CopilotKit | VAST Data |
|---|---|---|
| Taglinei | Open-source framework for building in-app AI copilots and agentic UIs | Unifying software layer for AI infrastructure |
| Foundedi | 2023 | 2016🏆 |
| HQi | Seattle, US | US |
| Employeesi | 11-50 | 201-500🏆 |
| Neuron scorei | 68 | 90🏆 |
| Total fundingi | $27M | $2.4B🏆 |
| Latest roundi | Series A · May 2026 | Series F · Apr 2026 |
| Valuationi | — | $30B🏆 |
| Cheapest paid plani | Pricing not disclosed | — |
| Free plani | ✓ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Pricing not disclosed | Enterprise · Contact sales |
| Pricing summaryi | Open source | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for CopilotKit and VAST Data.
| Capability | CopilotKit | VAST Data |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of CopilotKit
- Offers a free plan
- Newer company (2023)
🔵 Strengths of VAST Data
- Has raised more capital ($2.4B vs $27M)
- Higher Neuron score (90 vs 68)
- More mature (2016)
Which should you choose?
Choose VAST Data if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Developer Tools tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose VAST Data if you want the most established option — it has raised $2.4B, 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
CopilotKit vs VAST Data — which is better?
It depends on your priority. CopilotKit is the leaner option; VAST Data has broader feature depth. See the side-by-side table above.
Is CopilotKit cheaper than VAST Data?
No — VAST Data's cheapest paid plan is Enterprise · Contact sales, while CopilotKit's is Open source.
Do CopilotKit and VAST Data offer free plans?
CopilotKit: Yes, has a free plan. VAST Data: Paid only.
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