AI voice agent market, September 2026
Miles FosterOwner and tester, RankDude
The marketâ–Ľ Shrinking
- Visits, year on year, without PolyAI
- -15%
- Visits vs August 2026
- -18%
- Name searches vs October 2025
- -2.6%
Every month I measure Google visits to the 9 AI voice agent sites I track, and how often people search for them by name. In September 2026 they got about 602,538 visits, 24% fewer than a year ago and 18% fewer than in August 2026.
Below: who grew fastest (one site is up 333% in a year), who sits highest on Google, where the visitors live and what comes next.
Data from DataForSEO, Tranco, Chrome UX Report, Ahrefs and SerpApi · not a ranking
AI voice agent market: the key numbers for September 2026
Four numbers for September 2026. Visits mean visits from Google search to the tracked sites. Tap one for the detail below.
- The tracked sites got 602,538 visits from Google in September 2026, 24% fewer than a year ago and 18% fewer than in August 2026. PolyAI, which takes 71.9% of all the visits, accounts for most of the fall (84% of it). Without it, visits would be down 15.0% on a year ago instead of down 23.9%. PolyAI made most of the move in September 2026: it lost 122,210 of the market's 133,926 visits; without it, visits to the other sites fell 6.5% on August 2026.
- Google Ads gives no search figure I can publish for “ai voice agents” this month. People searched the site names 43,490 times in the US in September 2026, 3% less often than in October 2025.
- 1 tracked site is on Google’s first page for “ai voice agents”; the highest is Retell AI at position 1. PolyAI is the most-visited site.
- 23.4% of visits came from the US (26.5% a year ago), then India, Canada and United Kingdom. The five most-visited sites took 97.4% of all visits.
1How many visits
In plain words: These sites got fewer visits from Google than a year ago (-24%), and September 2026 was a weaker month than August 2026 (-18%). PolyAI, which takes 71.9% of all the visits, accounts for most of the fall (84% of it). Without it, visits would be down 15.0% on a year ago instead of down 23.9%. PolyAI made most of the move in September 2026: it lost 122,210 of the market's 133,926 visits; without it, visits to the other sites fell 6.5% on August 2026.
- Visits, September 2026
- 602,538 (-23.9% on a year ago, -18.2% on August 2026)
- US visits
- 141,000 (-32.7% on a year ago)
- 24-month peak
- 1,165,104 in April 2026
WorldVisits a month to AI voice agent sites, worldwide
Source: DataForSEO, Google search visits, all tracked sites.
Miles explains
Judge this line on the year, not the last dot: visits are 24% below a year ago, and 48% below the April 2026 high. One site winning or losing a ranking can swing a single month a lot.
2How many people went looking
People typed a site’s name into Google 3% less often than in October 2025 (-3%). That is the loyalty number, because nobody types a name by accident.
- Searches for "ai voice agents"
- no figure this month
- Name searches, September 2026
- 43,490 in the US (-2.6% since October 2025), 537,800 worldwide
USSearches a month for the site names, United States
Source: Google Ads via DataForSEO, to September 2026.
| Most searched by name, US | Searches a month |
|---|---|
 Retell AI | 22,200 |
 Vapi | 12,100 |
 Bland AI | 8,100 |
 Synthflow | 1,000 |
 SquadStack | 90 |
Most searched by name, US
- Retell AI
- Searches a month
- 22,200
- Vapi
- Searches a month
- 12,100
- Bland AI
- Searches a month
- 8,100
- Synthflow
- Searches a month
- 1,000
- SquadStack
- Searches a month
- 90
Ordered by US searches for the brand name in September 2026. A measured order, not a ranking.
Miles explains
Name searches are the number I trust most. They are about level, and nobody types a site’s name by accident, so this shows more people coming back on purpose.
3Who is on Google's first page
1 tracked site is on Google’s first page for “ai voice agents”, and Retell AI holds the first position. Being on that page is the biggest single thing that decides how many visits a site gets.
Ordered by US Google position for “ai voice agents”, then Tranco rank. A measured order, not a ranking.
| Site | Google US | Tranco | Move in 37 days | Search visits |
|---|---|---|---|---|
| Retell AI | 1 | 104,318 | â–˛ 8,685 | 85,678 |
| Synthflow | 12 | 232,749 | â–˛ 4,539 | 7,898 |
 Cresta | – | 53,243 | ▲ 5,644 | 7,654 |
| Vapi | – | 79,319 | ▼ 18,198 | 50,671 |
 PolyAI | – | 120,650 | ▲ 860 | 433,416 |
| Bland AI | – | 220,401 | ▲ 27,410 | 9,027 |
 Replicant | – | 1,015,182 | ▲ 87,425 | 2,648 |
 Regal | – | 1,310,805 | ▲ 442,171 | 1,547 |
| SquadStack | – | 1,960,547 | ▲ 174,557 | 3,999 |
Site
- Retell AI
- Google US
- 1
- Tranco
- 104,318
- Move in 37 days
- â–˛ 8,685
- Search visits
- 85,678
- Synthflow
- Google US
- 12
- Tranco
- 232,749
- Move in 37 days
- â–˛ 4,539
- Search visits
- 7,898
- Cresta
- Google US
- –
- Tranco
- 53,243
- Move in 37 days
- â–˛ 5,644
- Search visits
- 7,654
- Vapi
- Google US
- –
- Tranco
- 79,319
- Move in 37 days
- â–Ľ 18,198
- Search visits
- 50,671
- PolyAI
- Google US
- –
- Tranco
- 120,650
- Move in 37 days
- â–˛ 860
- Search visits
- 433,416
- Bland AI
- Google US
- –
- Tranco
- 220,401
- Move in 37 days
- â–˛ 27,410
- Search visits
- 9,027
- Replicant
- Google US
- –
- Tranco
- 1,015,182
- Move in 37 days
- â–˛ 87,425
- Search visits
- 2,648
- Regal
- Google US
- –
- Tranco
- 1,310,805
- Move in 37 days
- â–˛ 442,171
- Search visits
- 1,547
- SquadStack
- Google US
- –
- Tranco
- 1,960,547
- Move in 37 days
- â–˛ 174,557
- Search visits
- 3,999
Source: DataForSEO (US Google positions) and Tranco, September 2026. First 9 of 9 sites shown.
Miles explains
No tracked site sits high on Google for “ai voice agents”, so most visits here come from people who already know the names.
4Who grew, who faded
Biggest gain in September 2026: Retell AI (+10%); biggest loss: SquadStack (-67%). Year-on-year growers are on the demand page.
Biggest moves in September 2026
| Up this month | Aug 26 | Sep 26 | Change |
|---|---|---|---|
| Retell AI | 77,865 | 85,678 | +10.0% |
| Synthflow | 7,280 | 7,898 | +8.5% |
| Bland AI | 8,865 | 9,027 | +1.8% |
Up this month
- Retell AI
- Aug 26
- 77,865
- Sep 26
- 85,678
- Change
- +10.0%
- Synthflow
- Aug 26
- 7,280
- Sep 26
- 7,898
- Change
- +8.5%
- Bland AI
- Aug 26
- 8,865
- Sep 26
- 9,027
- Change
- +1.8%
| Down this month | Aug 26 | Sep 26 | Change |
|---|---|---|---|
| SquadStack | 12,038 | 3,999 | -66.8% |
| PolyAI | 555,626 | 433,416 | -22.0% |
| Vapi | 64,022 | 50,671 | -20.9% |
| Cresta | 7,759 | 7,654 | -1.4% |
Down this month
- SquadStack
- Aug 26
- 12,038
- Sep 26
- 3,999
- Change
- -66.8%
- PolyAI
- Aug 26
- 555,626
- Sep 26
- 433,416
- Change
- -22.0%
- Vapi
- Aug 26
- 64,022
- Sep 26
- 50,671
- Change
- -20.9%
- Cresta
- Aug 26
- 7,759
- Sep 26
- 7,654
- Change
- -1.4%
Brand demand, since October 2025
| Searched more | Oct 25 | Sep 26 | Change |
|---|---|---|---|
| Bland AI | 5,400 | 8,100 | +50.0% |
| Retell AI | 18,100 | 22,200 | +22.7% |
Searched more
- Bland AI
- Oct 25
- 5,400
- Sep 26
- 8,100
- Change
- +50.0%
- Retell AI
- Oct 25
- 18,100
- Sep 26
- 22,200
- Change
- +22.7%
| Searched less | Oct 25 | Sep 26 | Change |
|---|---|---|---|
| Synthflow | 2,900 | 1,000 | -65.5% |
| Vapi | 18,100 | 12,100 | -33.1% |
Searched less
- Synthflow
- Oct 25
- 2,900
- Sep 26
- 1,000
- Change
- -65.5%
- Vapi
- Oct 25
- 18,100
- Sep 26
- 12,100
- Change
- -33.1%
Source: Google Ads via DataForSEO.
5Where the visitors live
About 23 of every 100 visits come from the United States.
- US share of visits
- 23.4% (26.5% a year ago)
- Largest outside the US
- India, Canada and United Kingdom
USShare of visits that come from the US (%)
US share of worldwide search visits, month by month.
| Country | Search visits a month | Share of the measured countries |
|---|---|---|
| India | 60,731 | 40.7% |
| Canada | 31,954 | 21.4% |
| United Kingdom | 25,010 | 16.8% |
| Brazil | 21,367 | 14.3% |
| Australia | 3,896 | 2.6% |
| France | 3,228 | 2.2% |
| Germany | 2,928 | 2% |
Country
- India
- Search visits a month
- 60,731
- Share of the measured countries
- 40.7%
- Canada
- Search visits a month
- 31,954
- Share of the measured countries
- 21.4%
- United Kingdom
- Search visits a month
- 25,010
- Share of the measured countries
- 16.8%
- Brazil
- Search visits a month
- 21,367
- Share of the measured countries
- 14.3%
- Australia
- Search visits a month
- 3,896
- Share of the measured countries
- 2.6%
- France
- Search visits a month
- 3,228
- Share of the measured countries
- 2.2%
- Germany
- Search visits a month
- 2,928
- Share of the measured countries
- 2%
Source: DataForSEO, September 2026.
Miles explains
The US is the single biggest market, but only about 23 in every 100 visits. India alone is 40.7% of the countries I measure outside it.
6Links and ratings
The tracked sites had 28,820 referring domains between them in September 2026; this is the first reading, so there is no year-on-year figure yet. The average Domain Rating is 68. Retell AI has the strongest link profile at DR 78.
| By Domain Rating (Ahrefs) | DR |
|---|---|
| Retell AI | 78 |
| Vapi | 78 |
| Synthflow | 74 |
| Bland AI | 72 |
| PolyAI | 72 |
| Cresta | 71 |
| Regal | 59 |
| Replicant | 59 |
By Domain Rating (Ahrefs)
- Retell AI
- DR
- 78
- Vapi
- DR
- 78
- Synthflow
- DR
- 74
- Bland AI
- DR
- 72
- PolyAI
- DR
- 72
- Cresta
- DR
- 71
- Regal
- DR
- 59
- Replicant
- DR
- 59
| By referring domains | Domains |
|---|---|
| Retell AI | 4,739 |
| Bland AI | 4,412 |
| PolyAI | 4,275 |
| Cresta | 3,802 |
| Vapi | 3,631 |
| Synthflow | 3,454 |
| Replicant | 2,555 |
| SquadStack | 980 |
By referring domains
- Retell AI
- Domains
- 4,739
- Bland AI
- Domains
- 4,412
- PolyAI
- Domains
- 4,275
- Cresta
- Domains
- 3,802
- Vapi
- Domains
- 3,631
- Synthflow
- Domains
- 3,454
- Replicant
- Domains
- 2,555
- SquadStack
- Domains
- 980
Source: DataForSEO and Ahrefs, September 2026.