Features, pricing, and fit
Compare Regal AI Agents and Ultravox on voice capabilities, pricing, and fit.
Compare Regal AI and Ultravox for AI phone agents, then match channels, workflows, and deployment models to your call flow.
Revenue and contact-center platform with a no-code voice-agent builder, unified customer profiles, event-triggered journeys, IVR/routing, and cross-channel outreach.
Revenue or service teams coordinating inbound and outbound voice with customer-signal-driven journeys.
Explore its buying criteria: AI phone agents · Contact-center AI.
API-first native speech-language model with a no-code Console, custom tools, and bring-your-own telephony for phone, web, and native apps.
Engineering teams that want direct speech processing and control over telephony or app transports.
Explore its buying criteria: AI phone agents · Voice AI platforms.
Both profiles checked 2026-09-04.
Use the table below to compare each provider’s documented scope.
Before you decide
Regal AI: Not publicly documented Ultravox: Pay-as-you-go and Pro plans combine a published per-minute rate with monthly plan fees; Enterprise is custom, and SIP is priced separately. Ask both vendors to quote the same expected workload, required channels, and implementation scope. Include required subscriptions and usage charges before comparing the total; the listed starting prices alone may cover different work.
The recorded knowledge and data sources for Regal AI include Not publicly documented. For Ultravox, they include Not publicly documented. Ask each provider to demonstrate access for the exact systems you use, with permissions, freshness, and failure behavior. A source missing from this directory is not proof that a provider cannot support it.
Use the same representative calls, approved instructions, and escalation rules in both pilots. How does it handle interruption and uncertainty? Which actions can it complete, and which require approval? What context reaches a human during transfer? Record conversation quality, completed tasks, human handoffs, and total cost in the buyer worksheet. Check these specific cautions before launch: Regal AI: Architecture is undisclosed. Outbound consent, suppression, caller identity, pacing, and jurisdiction rules remain buyer responsibilities. Ultravox: Open weights do not remove hosting, latency, safety, evaluation, voice, and telephony work. Review license and SLA.
Record your requirements and pilot results in the buyer worksheet →
Swipe or scroll the table to see every column.
| Criterion | Regal AI Agents | Ultravox |
|---|---|---|
| Provider type | Revenue and contact-center voice agent platform | Native speech-language model API |
| Best fit | Revenue or service teams coordinating inbound and outbound voice with customer-signal-driven journeys. | Engineering teams that want direct speech processing and control over telephony or app transports. |
| Key capabilities | inbound agents; outbound agents; event-driven outreach; CRM integration; human routing | direct speech-language interaction; open weights; hosted API; tools; realtime sessions |
| Team sizes | mid-market; enterprise; revenue teams | startup; mid-market; enterprise; developer |
| Call surfaces | phone / PSTN; API / SDK | phone / PSTN; API / SDK |
| Voice stack | Not publicly documented | Native speech-language model |
| Telephony | Not publicly documented | Not publicly documented |
| Call controls | Not publicly documented | Not publicly documented |
| Languages | Not publicly documented | Not publicly documented |
| Integrations | Not publicly documented | Not publicly documented |
| Knowledge and data | Not publicly documented | Not publicly documented |
| Pricing model | Not publicly documented | Pay-as-you-go and Pro plans combine a published per-minute rate with monthly plan fees; Enterprise is custom, and SIP is priced separately. |
| Pricing signal | Not publicly documented. | 30 free minutes; $0.05/min pay-as-you-go; Pro $100/month; SIP about $0.005/min. |
| Free plan or trial | Not publicly documented | 30 free minutes; open weights under published license. |
| What stands out | Regal documents operational voice controls such as fallback voices, DTMF collection, voicemail settings, and IVR/routing alongside its event-triggered Journey Builder. | Ultravox documents a native speech path without a separate ASR stage, then exposes both Console prototyping and REST/SDK integration with BYOT telephony. |
| Considerations | Architecture is undisclosed. Outbound consent, suppression, caller identity, pacing, and jurisdiction rules remain buyer responsibilities. | Open weights do not remove hosting, latency, safety, evaluation, voice, and telephony work. Review license and SLA. |
Revenue or service teams coordinating inbound and outbound voice with customer-signal-driven journeys.
Regal documents operational voice controls such as fallback voices, DTMF collection, voicemail settings, and IVR/routing alongside its event-triggered Journey Builder.
Engineering teams that want direct speech processing and control over telephony or app transports.
Ultravox documents a native speech path without a separate ASR stage, then exposes both Console prototyping and REST/SDK integration with BYOT telephony.
Verify current pricing, limits, security, and required integrations directly with each provider before purchasing.
Test recognition, speech quality, interruptions, language switching, tool use, and human transfer with your own calls in the required language. Availability can vary by model, plan, and phone route.
DocsBot documents multilingual voice workflows and Japanese support. Verify the exact voice, phone path, and transfer behavior in your pilot. Review DocsBot language information ↗
Other providers’ language claims reflect cited vendor material; confirm Japanese and other required languages directly with each provider.
Listing does not imply endorsement or a performance guarantee. This directory is published by DocsBot. Editorial policy
Your business. Your shortlist.
Start with your website. Answer a few focused questions, then get a personalized PDF with fit, trade-offs, alternatives and a pilot plan for your call flow.
