OpenAI Realtime API vs Google Cloud Conversational Agents
How the two platforms compare on pricing, live demos, calls, integrations, and setup — highlighted where they differ.
Developer API
OpenAI Realtime API
Realtime speech-to-speech API for building low-latency voice agents over WebRTC, WebSocket, or SIP.
Developer API
Google Cloud Conversational Agents
Google Cloud platform for deterministic and generative voice agents built with flows, playbooks, data stores, and integrations.
Highlighted rows differ between these picks
| Attribute | OpenAI Realtime API | Google Cloud Conversational Agents |
|---|---|---|
| Platform type | Developer API | Developer API |
| Pricing | Usage Based pricing $32/M audio input tokens and $64/M audio output tokens for gpt-realtime | $0.06-$0.12/min $0.06/min for voice flows or $0.12/min for generative playbooks |
| Test it | Open live demo | Free trial |
| Calls | Inbound, Outbound | Inbound |
| Human handoff | Yes | Yes |
| Setup difficulty | Technical | Technical |
| Use cases | Customer Support Appointment Scheduling Lead Qualification Custom Voice Apps | Customer Support Appointment Scheduling Contact Center Self Service Transactional Workflows |
| Useful for |
|
|
| Integrations | ||
| WebRTC | — | |
| WebSocket | — | |
| SIP | — | |
| OpenAI Agents SDK | — | |
| Custom tools | — | |
| Custom API | — | |
| Google Cloud | — | |
| Dialogflow API | — | |
| Contact Center AI | — | |
| Telephony | — | |
| +2 more across these tools — see each profile for the full list. | ||
Platform type
- OpenAI Realtime API
- Developer API
- Google Cloud Conversational Agents
- Developer API
Pricing
- OpenAI Realtime API
Usage Based pricing
$32/M audio input tokens and $64/M audio output tokens for gpt-realtime
- Google Cloud Conversational Agents
$0.06-$0.12/min
$0.06/min for voice flows or $0.12/min for generative playbooks
Test it
- OpenAI Realtime API
- Open live demo
- Google Cloud Conversational Agents
- Free trial
Calls
- OpenAI Realtime API
- Inbound, Outbound
- Google Cloud Conversational Agents
- Inbound
Human handoff
- OpenAI Realtime API
- Yes
- Google Cloud Conversational Agents
- Yes
Setup difficulty
- OpenAI Realtime API
- Technical
- Google Cloud Conversational Agents
- Technical
Use cases
- OpenAI Realtime API
- Customer SupportAppointment SchedulingLead QualificationCustom Voice Apps
- Google Cloud Conversational Agents
- Customer SupportAppointment SchedulingContact Center Self ServiceTransactional Workflows
Useful for
- OpenAI Realtime API
- • Developer teams
- • Speech-to-speech agents
- • Tool-using voice workflows
- • Custom web and phone experiences
- Google Cloud Conversational Agents
- • Google Cloud teams
- • Complex deterministic flows
- • Hybrid generative agents
- • Enterprise self-service
Integrations
| OpenAI Realtime API | Google Cloud Conversational Agents | |
|---|---|---|
| WebRTC | — | |
| WebSocket | — | |
| SIP | — | |
| OpenAI Agents SDK | — | |
| Custom tools | — | |
| Custom API | — | |
| Google Cloud | — | |
| Dialogflow API | — | |
| Contact Center AI | — | |
| Telephony | — |
+2 more across these tools — see each profile for the full list.
What would these cost to run?
Enter your call volume once and see OpenAI Realtime API and Google Cloud Conversational Agents priced at the same usage, ranked alongside every other platform.