Regal vs Retell AI
A side-by-side comparison of Regal and Retell AI, two Voice tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
| Attribute | Regal | Retell AI |
|---|---|---|
| Category | Voice | Voice |
| Pricing (differs) | PAID | FREEMIUM |
| License | Proprietary | Proprietary |
| Deployment | Cloud | Cloud |
| Platforms | Web, API | Web, API |
| Model support (differs) | Single model (proprietary) | Multi-model |
| Vendor (differs) | Regal | Retell AI |
| Capabilities (differs) |
|
|
The honest brief
Regal
Tuned for high-volume contact-center calling — its agents draw on millions of prior calls, and Copilot ships a working voice agent in about a day.
- Phone, SMS, chat, and WebRTC in one platform
- Agents improve from past call data
- Copilot shortens build time to ~a day
- Proven at contact-center call volume
- No public free tier — demo/sales-led
- Enterprise focus; heavier setup than DIY APIs
- Pricing not published
Retell AI
Bring your own LLM behind the voice agent, so it isn't locked to a single model like most all-in-one voice platforms.
- Inbound and outbound call handling
- SIP/Twilio telephony built in
- Low-latency turn-taking model
- No-code builder plus API
- Per-minute costs stack with LLM/TTS
- Voice quality depends on chosen vendors
- Cloud-only, no self-host
When to pick which
Both cover Voice agent.
Pick Regal if you need Trigger-action automation, Multi-agent orchestration, and Conversation intelligence.
- Trigger-action automation (secondary capability)
- Multi-agent orchestration (secondary capability)
- Conversation intelligence (primary capability)
Pick Retell AI if you need Tool / function calling and AI app builder.
- Tool / function calling (secondary capability)
- AI app builder (primary capability)
They also differ on:
- Pricing
- PAID · FREEMIUM
- Model support
- Single model (proprietary) · Multi-model