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OpenAI
ChatGPT Voice
Talk to ChatGPT naturally: advanced voice mode answers questions, brainstorms, translates, and tutors hands-free.
CosVoice
CosVoice
Gives your AI assistant (Grok, Claude, ChatGPT and others) its own US phone number and email, so it can make and answer calls and send written summaries.
Highlighted rows differ between these picks
| Attribute | OpenAI ChatGPT Voice | CosVoice |
|---|---|---|
| Category | Personal Assistant Agent | Personal Assistant Agent |
| Pricing | From $20/mo Free with daily limits; Plus from $20/month | From $29/mo Starter $29/month for 100 minutes; Plus $79; Pro $199; extra minutes $0.25 |
| Test it | Free trial | Free trial |
| Channels | iOS Android Web macOS Windows | Phone SMS Email MCP |
| Call direction | — | Both |
| Human handoff | — | No |
| Setup | Low Low - tap the voice icon in the ChatGPT app | Low Low - connect your assistant over MCP and save the number |
| Useful for |
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| Integrations | ||
| iOS | — | |
| Android | — | |
| Web | — | |
| macOS | — | |
| Windows | — | |
| MCP | — | |
| Grok | — | |
| Claude | — | |
| ChatGPT | — | |
| Cursor | — | |
| +6 more across these tools — see each profile for the full list. | ||
| Strengths |
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| Limitations |
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Category
- OpenAI ChatGPT Voice
- Personal Assistant Agent
- CosVoice
- Personal Assistant Agent
Pricing
- OpenAI ChatGPT Voice
From $20/mo
Free with daily limits; Plus from $20/month
- CosVoice
From $29/mo
Starter $29/month for 100 minutes; Plus $79; Pro $199; extra minutes $0.25
Test it
- OpenAI ChatGPT Voice
- Free trial
- CosVoice
- Free trial
Channels
- OpenAI ChatGPT Voice
- iOSAndroidWebmacOSWindows
- CosVoice
- PhoneSMSEmailMCP
Call direction
- OpenAI ChatGPT Voice
- —
- CosVoice
- Both
Human handoff
- OpenAI ChatGPT Voice
- —
- CosVoice
- No
Setup
- OpenAI ChatGPT Voice
Low
Low - tap the voice icon in the ChatGPT app
- CosVoice
Low
Low - connect your assistant over MCP and save the number
Useful for
- OpenAI ChatGPT Voice
- • Hands-free questions and brainstorming
- • Language practice and translation
- • Talking through ideas
- • Accessibility
- CosVoice
- • Giving an AI assistant a phone line
- • Delegated calls and bookings
- • Answering missed personal calls with summaries
- • MCP-based assistant workflows
Integrations
| OpenAI ChatGPT Voice | CosVoice | |
|---|---|---|
| iOS | — | |
| Android | — | |
| Web | — | |
| macOS | — | |
| Windows | — | |
| MCP | — | |
| Grok | — | |
| Claude | — | |
| ChatGPT | — | |
| Cursor | — |
+6 more across these tools — see each profile for the full list.
Strengths
- OpenAI ChatGPT Voice
- • Most capable general assistant brain
- • Natural, emotionally aware advanced voice
- • Genuinely useful free tier
- CosVoice
- • Gives existing AI assistants a real phone number
- • Works over MCP with several assistants
- • Written summary after every call
Limitations
- OpenAI ChatGPT Voice
- • Daily minutes cap on advanced voice
- • No deep phone/device control
- • Not designed to manage calendars or email autonomously
- CosVoice
- • US phone numbers only
- • Trial requires a card and converts to a paid plan
- • Several listed integrations are marked as coming soon