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Voice AI Agents APIs
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Popular first highlights editorial picks, then ranks providers by monthly downloads of their official SDKs on npm and PyPI (measured 2026-10-18). Others follow A–Z.
Retell AI
1.5M SDK downloads/moView API profile
Vapi
1.2M SDK downloads/moView API profile
Cartesia
1.2M SDK downloads/moView API profile
Hume AI
361.1K SDK downloads/moView API profile
Ultravox
63.6K SDK downloads/moView API profile
Voca.ai
View API profileCounts reflect unique named profiles assigned to this category. Documentation and integration details vary by provider.