RankDude
Updated 11/02/2026 · next update 12/01/2026

AI symptom checker market, October 2026

Miles FosterOwner and tester, RankDude

The market▼ Shrinkingbut visits without Mayo Clinic Symptom Checker are up 316% on a year ago

Visits, year on year, without Mayo Clinic Symptom Checker
+316%
Visits vs September 2026
+2.6%
Name searches vs October 2025
-31%

Every month I measure Google visits to the 5 AI symptom checker sites I track, and how often people search for them by name. In October 2026 they got about 89 million visits, 6% more than a year ago and 3% more than in September 2026.

Below: who grew fastest (one site is up 1841% in a year), who sits highest on Google, where the visitors live and what comes next.

Data from DataForSEO, Tranco, Chrome UX Report and Ahrefs · not a ranking

AI symptom checker market: the key numbers for October 2026

Four numbers for October 2026. Visits mean visits from Google search to the tracked sites. Tap one for the detail below.

  • The tracked sites got 88,999,817 visits from Google in October 2026, 6% more than a year ago and 3% more than in September 2026. Mayo Clinic Symptom Checker, which takes 96.1% of all the visits, accounts for most of the rise (50% of it). Without it, visits would be up 316.3% on a year ago instead of up 6.3%.
  • “ai symptom checker” gets about 1,600 US searches a month. People searched the site names 3,310 times in the US in September 2026, 31% less often than in October 2025.
  • 1 tracked site is on Google’s first page for “ai symptom checker”; the highest is Isabel Symptom Checker at position 2. Mayo Clinic Symptom Checker is the most-visited site.
  • 32.6% of visits came from the US (31.6% a year ago), then India, Canada and United Kingdom.

1How many visits

In plain words: These sites got more visits from Google than a year ago (+6%), and October 2026 was about the same as September 2026 (+3%). Mayo Clinic Symptom Checker, which takes 96.1% of all the visits, accounts for most of the rise (50% of it). Without it, visits would be up 316.3% on a year ago instead of up 6.3%.

Visits, October 2026
88,999,817 (+6.3% on a year ago, +2.6% on September 2026)
US visits
29,011,624 (+9.6% on a year ago)
24-month peak
110,744,854 in January 2025

WorldVisits a month to AI symptom checker sites, worldwide

050M100M150M200MNov 24Jan 25Mar 25May 25Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jul 26Oct 2689M
Low 70MHigh 111MAverage 86M
Hover, tap, or use the arrow keys to inspect a month

Source: DataForSEO, Google search visits, all tracked sites.

Miles explains

Judge this line on the year, not the last dot: visits are 6% above a year ago, and 20% below the January 2025 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 31% less often than in October 2025 (-31%). That is the loyalty number, because nobody types a name by accident.

Searches for "ai symptom checker"
1,600 a month in the US, 2,900 worldwide (12-month average)
Name searches, September 2026
3,310 in the US (-30.8% since October 2025), 20,200 worldwide

USSearches a month for "ai symptom checker", United States

05001.0K1.5K2.0KOct 25Dec 25Feb 26Apr 26Jun 26Sep 261.0K
Low 1.0KHigh 1.9KAverage 1.4K
Hover, tap, or use the arrow keys to inspect a month

Source: Google Ads via DataForSEO.

USSearches a month for the site names, United States

02.5K5.0K7.5K10.0KOct 25Dec 25Feb 26Apr 26Jun 26Sep 263.3K
Low 3.0KHigh 8.1KAverage 4.7K
Hover, tap, or use the arrow keys to inspect a month

Source: Google Ads via DataForSEO, to September 2026.

Most searched by name, US

Ordered by US searches for the brand name in September 2026. A measured order, not a ranking.

Rising next to the term on Google Trends: “mayo clinic symptom checker”.

Miles explains

Name searches are the number I trust most. They are down 31%, and nobody types a site’s name by accident, so this shows fewer people coming back on purpose.

3Who is on Google's first page

1 tracked site is on Google’s first page for “ai symptom checker”; the highest-placed is Isabel Symptom Checker, at position 2. Being on that page is the biggest single thing that decides how many visits a site gets.

Ordered by US Google position for “ai symptom checker”, then Tranco rank. A measured order, not a ranking.

Site

  • Isabel Symptom Checker
    Google US
    2
    Tranco
    1,473,012
    Move in 41 days
    ▲ 1,835
    Search visits
    20,906
  • Ubie
    Google US
    17
    Tranco
    54,970
    Move in 41 days
    ▼ 2,601
    Search visits
    3,021,609
  • Mayo Clinic Symptom Checker
    Google US
    –
    Tranco
    927
    Move in 41 days
    ▼ 27
    Search visits
    85,518,327
  • Ada
    Google US
    –
    Tranco
    102,647
    Move in 41 days
    ▼ 13,588
    Search visits
    415,016
  • Symptomate
    Google US
    –
    Tranco
    2,417,790
    Move in 41 days
    ▼ 438,091
    Search visits
    23,959

Source: DataForSEO (US Google positions) and Tranco, October 2026. First 5 of 5 sites shown.

Miles explains

No tracked site sits high on Google for “ai symptom checker”, so most visits here come from people who already know the names.

4Who grew, who faded

Biggest gain in October 2026: Mayo Clinic Symptom Checker (+3%); biggest loss: Isabel Symptom Checker (-17%). Year-on-year growers are on the demand page.

Biggest moves in October 2026

Up this month

Down this month

Brand demand, since October 2025

Searched less

Source: Google Ads via DataForSEO.

5Where the visitors live

About 33 of every 100 visits come from the United States.

US share of visits
32.6% (31.6% a year ago)
Largest outside the US
India, Canada and United Kingdom
US share of "ai symptom checker" searches
55%

USShare of visits that come from the US (%)

012.52537.550Nov 24Jan 25Mar 25May 25Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jul 26Oct 2632.6
Low 18.5High 34.5Average 30
Hover, tap, or use the arrow keys to inspect a month

US share of worldwide search visits, month by month.

Country

  • India
    Search visits a month
    11,383,474
    Share of the measured countries
    50%
  • Canada
    Search visits a month
    5,085,321
    Share of the measured countries
    22.3%
  • United Kingdom
    Search visits a month
    3,685,684
    Share of the measured countries
    16.2%
  • Australia
    Search visits a month
    2,188,632
    Share of the measured countries
    9.6%
  • Germany
    Search visits a month
    203,530
    Share of the measured countries
    0.9%
  • Brazil
    Search visits a month
    132,716
    Share of the measured countries
    0.6%
  • France
    Search visits a month
    102,958
    Share of the measured countries
    0.5%

Source: DataForSEO, October 2026.

Miles explains

The US is the single biggest market, but only about 33 in every 100 visits. India alone is 50% of the countries I measure outside it.

6Links and ratings

The tracked sites had 420,105 referring domains between them in October 2026; this is the first reading, so there is no year-on-year figure yet. The average Domain Rating is 68. Mayo Clinic Symptom Checker has the strongest link profile at DR 92.

By Domain Rating (Ahrefs)

By referring domains

Source: DataForSEO and Ahrefs, October 2026.