AI Voice Agents Industry Report, September 2026

1Every figure in one table

Google Ads put US searches for "ai voice agents" more than five times higher in July 2026 than in the months before, while Google Trends interest in the US in July 2026 was 45 out of 100, against 85 in June 2026, so the term's search volume is held back on these pages until a later pull confirms it.

Brand-name searches leave out Cresta, Nucleus, Phonely, PolyAI, Regal, Replicant and Ringly: the name is shared with an ordinary word or another product.

2How many people visited

In plain words: These sites got fewer visits from Google than a year ago (-41%), and September 2026 was a weaker month than August 2026 (-21%). PolyAI alone takes 61.7% of the visits, so the totals mostly follow it. Without it, visits would be down 54.8% on a year ago instead of down 40.9%.

Miles explains

Judge this line on the year, not the last dot: visits are 41% below a year ago, and 58% below the December 2025 high. One site winning or losing a ranking can swing a single month a lot.

3How many people went looking

People typed a site’s name into Google 4% less often than in October 2025 (-4%). That is the loyalty number: nobody types a name by accident.

Miles explains

Name searches are the number I trust most. They are down 4%, and nobody types a site’s name by accident, so this shows fewer people coming back on purpose.

4Where the visitors live

About 24 of every 100 visits come from the United States. Outside the US I measure 7 countries one by one; the largest is India.

Miles explains

The US is the biggest single market, but only about 24 in every 100 visits. India alone is 44.2% of the countries measured outside it.

5The most-visited sites

PolyAI gets the most visits, Retell AI is the name people search for most, and Retell AI holds Google’s first position for “ai voice agents”. The five most-visited sites take 91.7% of all visits.

Most-visited sites by worldwide search visits

By worldwide search visits	Visits a month
PolyAI	433,416
Retell AI	85,678
Insighto AI	65,619
Vapi	50,671
Bland AI	9,027
Observe.AI	8,295
Synthflow	7,898
Cresta	7,654
Assort Health	6,560
Cognigy	6,287

By worldwide search visits

• PolyAI

  Visits a month

  433,416

• Retell AI

  Visits a month

  85,678

• Insighto AI

  Visits a month

  65,619

• Vapi

  Visits a month

  50,671

• Bland AI

  Visits a month

  9,027

• Observe.AI

  Visits a month

  8,295

• Synthflow

  Visits a month

  7,898

• Cresta

  Visits a month

  7,654

• Assort Health

  Visits a month

  6,560

• Cognigy

  Visits a month

  6,287

Most searched brand names, US

By US brand-name searches	Searches a month
Retell AI	22,200
Vapi	12,100
Bland AI	8,100
Assort Health	6,600
Observe.AI	1,900
Cognigy	1,600
Synthflow	1,000
Trillet	320
Dapta	210
Newo	210

By US brand-name searches

• Retell AI

  Searches a month

  22,200

• Vapi

  Searches a month

  12,100

• Bland AI

  Searches a month

  8,100

• Assort Health

  Searches a month

  6,600

• Observe.AI

  Searches a month

  1,900

• Cognigy

  Searches a month

  1,600

• Synthflow

  Searches a month

  1,000

• Trillet

  Searches a month

  320

• Dapta

  Searches a month

  210

• Newo

  Searches a month

  210

Miles explains

The five most-visited sites take 91.7% of all visits. When one of them gains or loses a big ranking, the whole market total moves with it.

6Who grew and who shrank

The fastest grower in a year was Retell AI (+333%); the steepest fall was at Phonely (-99.5%). Big swings are usually one site winning or losing one Google ranking.

Fastest growing sites

Growing	A year ago	Now	Change
Retell AI	19,791	85,678	+333%
Cresta	7,055	7,654	+9%

Growing

• Retell AI

  A year ago

  19,791

  Now

  85,678

  Change

  +333%

• Cresta

  A year ago

  7,055

  Now

  7,654

  Change

  +9%

Fastest declining sites

Declining	A year ago	Now	Change
Phonely	264,933	1,279	-99.5%
Regal	27,943	1,547	-95%
Newo	18,359	1,447	-92%
SquadStack	26,647	3,999	-85%
Observe.AI	20,038	8,295	-59%
Cognigy	13,169	6,287	-52%
Bland AI	16,434	9,027	-45%
Vapi	90,969	50,671	-44%

Declining

• Phonely

  A year ago

  264,933

  Now

  1,279

  Change

  -99.5%

• Regal

  A year ago

  27,943

  Now

  1,547

  Change

  -95%

• Newo

  A year ago

  18,359

  Now

  1,447

  Change

  -92%

• SquadStack

  A year ago

  26,647

  Now

  3,999

  Change

  -85%

• Observe.AI

  A year ago

  20,038

  Now

  8,295

  Change

  -59%

• Cognigy

  A year ago

  13,169

  Now

  6,287

  Change

  -52%

• Bland AI

  A year ago

  16,434

  Now

  9,027

  Change

  -45%

• Vapi

  A year ago

  90,969

  Now

  50,671

  Change

  -44%

Worldwide search visits, September 2026 against a year earlier; sites with at least 5,000 visits a year ago.