Short answer: There is no single best AI phone call app, because the products do different jobs. If you want an AI to call businesses for you, look at Gemini's Call for me, Grok Bot, ClawCall or OsmO, depending on your country and the app you use. Developers building their own voice agent should look at Vapi, Retell or Bland. If you only hate hold queues, your iPhone or Pixel may already have a free answer.
Decide the job first: calling out for you, answering for you, building a product, or just waiting on hold.
Built-in callers (Gemini, Grok Bot) are US-only and tied to a device or plan.
ClawCall offers flat-price unlimited calling to US numbers; OsmO covers the US, Canada, the UK and Australia.
Free hold tools are built into recent iPhones and Pixels.
How it works
- Sign in with your mobile numberYou get 50 free credits. Nothing to pay.
- Add OsmO to your AI appChatGPT, Claude, Grok and other apps that take connectors.
- Ask it to callOsmO calls, talks, and tells you what was said.
The full guide
Job 1: an AI that calls businesses for you
These take a request in plain words and place the call themselves. The right one mostly depends on where you live, which phone you have and which AI app you already use.
| App | Where it calls | How you use it | Cost to start |
|---|---|---|---|
| Gemini Call for me | US numbers | Gemini app on a Pixel 10 or 11, US SIM | Google AI subscription |
| Grok Bot | US businesses | Grok Bot desktop and phone apps | SuperGrok or some Cursor plans |
| Muse | Paid US subscribers (press reports) | Muse app | Not published for calling |
| ClawCall | US +1 numbers | AI apps and agents, per its site | Free trial up to 30 calls or 30 minutes; $8.99/month unlimited |
| OsmO For my AI | Businesses in your own country, if you live in the US, Canada, UK or Australia | ChatGPT, Claude, Grok and other connector apps | 50 free credits, about 16 answered calls |
When to pick what. If you have a recent Pixel in the US and pay for Google AI, Call for me is already on your phone. If you are on SuperGrok, Grok Bot is included. If you make a lot of calls to US numbers only, a flat monthly price such as ClawCall's can work out cheaper than paying per call. OsmO's lane is narrower and honest: it works inside the AI apps people already use, it works for people in four countries, and you can try it with 50 free credits and no card. With the free credits it calls listed businesses and toll-free lines; with the OsmO app it can also call your saved contacts.
Job 2: a platform for building your own voice agent
If you are a developer putting a voice agent inside your own product, you want a platform that sells minutes, numbers and an API. Three popular ones publish their prices:
- Vapi: hosting from $0.05 a minute with model costs passed through, $5 in free credits, and free Vapi numbers that take inbound calls only (outbound needs an imported number).
- Retell AI: pay as you go from $0.07 to $0.31 a minute, $10 in free credits and 20 free concurrent calls; it lists phone-menu navigation and call transfer.
- Bland: a free Start plan at $0.14 a minute, and a Build plan at $0.12 a minute plus $299 a month.
These are the better choice for call centres, sales teams and apps that need thousands of calls. OsmO is not a voice-building platform and has no REST API. Our page on AI phone agents for developers goes deeper.
Developer platforms bill by the minute, so a ten-minute hold on a platform costs ten times a one-minute call. Consumer callers usually price per call or per month instead. Compare like with like.
Job 3: an AI that answers your phone
AI receptionists and call screeners pick up for you, ask who is calling and why, and send you a summary. That is what the OsmO app does on your own number, with a 7-day free trial. Our guides to the AI receptionist app and how AI call screening works cover that side.
Job 4: something to wait on hold
| Tool | Phones | Countries | Cost |
|---|---|---|---|
| Hold Assist | iPhone 12, iPhone SE (3rd gen) and later | Not every country or region | Free, built in |
| Hold for Me | Pixel 3 and later | US, Canada, UK, Australia, Japan | Free, built in |
Both alert you when a person comes on the line. Neither speaks for you, so you still make the call and do the talking. If you want the whole call handled, you need one of the callers in Job 1.
Questions to ask before you pick
- Where are the businesses you call? Most built-in callers stop at US numbers.
- Which app do you live in? A caller inside the app you already use gets used; a separate app often does not.
- How many calls a month? A handful suits per-call credits; dozens may suit a flat monthly price.
- Whose number should show? Some services call from your own number, others from their own.
- What happens on a menu or a long hold? Check that the tool keeps going rather than hanging up.
- What will it refuse? Payments, passwords and emergency calls should all be a no.
Answer those six and the list above usually narrows to one or two. Try the free option first with a real errand, such as checking a shop's stock, before you pay for anything.
One more honest point: AI callers are still new. Expect the odd misheard name or a call that needs a second try, and keep anything with a deadline on your own list until you have the confirmation.
How we chose
We included products that publish what they do and what they cost on their own pages, and we left out claims we could not check there. Vendors change plans often, so follow the sources below for today's details.
Questions people ask
What is the best free AI that makes phone calls?
For hold queues, the free tools built into iPhone and Pixel. For full calls, ClawCall has a free trial and OsmO gives 50 free credits, about 16 answered calls.
Which AI calling app works outside the US?
Gemini's Call for me, Grok Bot and ClawCall call US numbers only. OsmO calls businesses in your own country if you live in the US, Canada, the UK or Australia.
Is OsmO a voice API?
No. OsmO has no REST API. Developers connect AI agents to it through its MCP endpoint, which places calls for a signed-in user.
Sources
Checked November 13, 2026. Vendors change their products often; follow the links for the current version.
- Google Help: Call for me in Gemini
- xAI docs: Grok Bot calls
- xAI: Grok Bot on more plans
- Meta Help: information for people who don't use Muse
- TechCrunch: Muse can now place calls to US businesses
- ClawCall pricing
- Vapi pricing
- Retell AI pricing
- Bland pricing
- Apple Support: Hold Assist on iPhone
- Google Pixel Help: Hold for Me