Inworld vs Retell AI
Inworld and Retell AI are both Conversational AI tools in our directory. This side-by-side comparison covers pricing, user ratings, supported platforms, key features and open-source status so you can decide which one fits your needs.
Side-by-side comparison
| Attribute | Inworld | Retell AI |
|---|---|---|
| Vendor | Inworld AI | Retell AI |
| Rating | ★ 4.4 | ★ 4.5 |
| Pricing | Pay-as-you-go | Pay-as-you-go |
| Platforms | API, Game engines, Web | API, Web |
| Key features | Persistent NPC personality & memory, Real-time voice with emotion, Goals and decision-making for NPCs | Low-latency voice with barge-in, Phone and web voice agents, LLM plus telephony plumbing |
| Headquarters | Mountain View, USA | San Francisco, USA |
| Founded | 2021 | 2023 |
| Open source | No | No |
Key differences
- Retell AI has a higher user rating (4.5★ vs 4.4★).
- Both Inworld and Retell AI use a Pay-as-you-go model.
- Inworld runs on API, Game engines, Web; Retell AI runs on API, Web.
Frequently asked questions
Is Inworld or Retell AI better?
By user rating, Retell AI scores higher (4.5★ vs 4.4★). Both are capable Conversational AI tools, so review the feature comparison for your use case.
Which is cheaper, Inworld or Retell AI?
Both Inworld and Retell AI use a Pay-as-you-go pricing model.
Are Inworld and Retell AI open source?
No — neither Inworld nor Retell AI is open source.