Cartesia vs Vapi
Which Developer Tools AI tool is better in 2026?
Cartesia
Ultra-fast voice AI for real-time applications
Vapi
Build, test and deploy voicebots in minutes rather than months
Side-by-side
Cartesia is the more established option (raised $164M); pricing is comparable on both sides.
| Metric | Cartesia | Vapi |
|---|---|---|
| Taglinei | Ultra-fast voice AI for real-time applications | Build, test and deploy voicebots in minutes rather than months |
| Foundedi | 2023🏆 | 2024 |
| HQi | San Francisco, US | US |
| Employeesi | 20-50🏆 | — |
| Neuron scorei | 54🏆 | 51 |
| Total fundingi | $164M🏆 | $50M |
| Latest roundi | Growth · Oct 2025 | Series B · May 2026 |
| Valuationi | — | $500M🏆 |
| Cheapest paid plani | — | — |
| Free plani | ✓ Free Tier | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Custom / Enterprise · Contact sales | Enterprise · Contact sales |
| Pricing summaryi | 2 published plans | 2 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Cartesia and Vapi.
| Capability | Cartesia | Vapi |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✓ |
| SDK languages | 2 (Python, JavaScript/TypeScript) | — |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✓ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Cartesia
- Has raised more capital ($164M vs $50M)
- Higher Neuron score (54 vs 51)
- Offers a free plan
- Offers a free trial
🔵 Strengths of Vapi
- Newer company (2024)
Which should you choose?
Choose Vapi if price matters most — it starts at Freemium, 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 Cartesia if you want the most established option — it has raised $164M, 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
Cartesia vs Vapi — which is better?
It depends on your priority. Cartesia has raised more capital and is the more established option; Vapi has broader feature depth. See the side-by-side table above.
Is Cartesia cheaper than Vapi?
No — Vapi's cheapest paid plan is Freemium, while Cartesia's is Free.
Do Cartesia and Vapi offer free plans?
Cartesia: Yes, has a free plan. Vapi: Paid only.
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