AI phone answering is a fast-growing market, but no one tracks how many businesses use it. A simple count of your own missed calls says more.
Companies are expected to spend far more on AI that answers the phone. One estimate puts the market for AI voice agents at $3.5 billion in 2026 and $35.2 billion by 2033. But a new roundup of statistics from Goodcall, a company that sells an AI receptionist, admits a catch. Almost no hard data exists on how many businesses actually use AI receptionists.
No standard market category exists for AI receptionists alone. The closest one is AI voice agents, which covers software that handles phone work like customer service, screening sales leads and booking appointments. Grand View Research valued that market at $2.5 billion in 2025 and expects growth of 39.0% a year from 2026 to 2033. Inbound voice agents made up 52.1% of revenue in 2025, and North America made up 38.1%.
Nobody can say for sure. Most surveys measure broader things, like AI in general or customer-service automation. A Gartner survey of 187 customer-service leaders, taken in July and August 2024, offers a loose guide. Of those leaders, 85% planned to explore or pilot customer-facing conversational AI in 2025. For voice specifically, 44% were exploring an AI voice bot, 11% were piloting one and 5% had already deployed one.
The most striking figures are about callers. In a 2025 CallRail survey of 1,000 US consumers, 78% said they had given up on a business after an unanswered call. Also, 82% said they would call a competitor if a business did not pick up. Only 42% said they leave a voicemail.
A related example comes from education. A December 2025 UPCEA review of inquiries to colleges found 44% got no response, and the average wait was 14 hours and 23 minutes. That study is not about phone calls, but it shows what ignored inquiries can look like.
The roundup suggests measuring your own situation instead of relying on industry averages. The formula is unanswered calls divided by total calls, times 100. If 150 of 1,000 calls go unanswered, the missed-call rate is 15%. Other numbers worth tracking:
There is no single missed-call rate that fits every business. There is also no reliable benchmark for after-hours calls, or for how many calls turn into leads. Those vary by industry and by caller. Readers should also remember that the source sells this kind of product, which does answer calls around the clock, book appointments and pass calls to staff.
Before paying for an AI receptionist, divide your unanswered calls by your total calls to see how big your missed-call problem really is.
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