CommunityMentions
cars and auto
Updated October 5, 2026

r/whatcarshouldIbuy for brand marketing: what AI answers cite and where we have posted

Across 66,986 AI answers we tracked, r/whatcarshouldIbuy threads were cited 187 times in 145 of them (Apr 3, 2026 to Oct 2, 2026), which ranks it #26 of the 138 subreddits cited 50 or more times. CommunityMentions has also placed 66 verified comments in r/whatcarshouldIbuy for fewer than 5 brands, starting Mar 2026.

187

AI citations of its threads

57

different threads cited

66

verified comments we placed

757,070

members at last check

How AI answers use r/whatcarshouldIbuy

AI citations of r/whatcarshouldIbuy threads by engine
EngineCitationsShare
Perplexity (Sonar)13271%
Gemini (2.0 and 2.5 Flash)3418%
OpenAI models (GPT-4o, GPT-5.1)2111%
AI citations of r/whatcarshouldIbuy threads by question type
Question typeCitationsShare
Describing a problem8646%
Comparing products or competitors6233%
Looking for a product to buy3921%

The r/whatcarshouldIbuy threads AI answers cite most

Our verified comments in r/whatcarshouldIbuy

CommunityMentions placements in r/whatcarshouldIbuy
MeasureValue
Verified comments placed66
Brands they were placed forfewer than 5
First placementMar 24, 2026
Busiest monthMay 2026 (29 comments)
Median comments in the thread when we posted6

Reading the r/whatcarshouldIbuy numbers

Perplexity supplies the largest share of the citations (71%, 132 of 187), ahead of Gemini at 18%.

By question type, describing a problem accounts for 46% of the answers that cited r/whatcarshouldIbuy, then comparing products or competitors (33%) and looking for a product to buy (21%).

Citations are spread out: the most-cited thread accounts for 22% of them and the top three for 32%, out of 57 different threads.

Under 1% of the 531 comments we scanned in r/whatcarshouldIbuy contained a link, so a comment that names a brand without linking is the norm here.

Of 4,849 posts we sampled in r/whatcarshouldIbuy, 1% linked out to another site, so posts here are mostly text.

It is #151 of the 211 subreddits where we have placed 50 or more verified comments, 0.1% of all our verified Reddit comments, and #9 of the 12 car and auto subreddits listed on this site by that count.

The subreddit had about 757,070 members when we last checked it.

Before you post anything yourself, read the rules of r/whatcarshouldIbuy; moderators change them. For how these threads reach answers, see the AI search guide.

Frequently asked questions

Do AI answers cite r/whatcarshouldIbuy?

Yes. In 66,986 AI answers we tracked between Jan 9, 2026 and Oct 2, 2026, r/whatcarshouldIbuy threads were cited 187 times across 145 answers and 57 different threads.

How many comments has CommunityMentions placed in r/whatcarshouldIbuy?

66 verified comments for fewer than 5 brands, starting Mar 2026.

Similar car and auto subreddits

Subreddits similar to r/whatcarshouldIbuy
SubredditAI citationsOur verified commentsMembers
r/AutoTransport1668220,881
r/350z13910561,013
r/G371289859,015
r/370z10810442,301
r/askcarsales295under 50
r/CarLeasingHelp8212114,851

Related lists and guides

Method

Counts come from CommunityMentions' AI-answer tracking and delivery database; anything under 50 shows as "under 50". The page text is generated from those counts. Full method.

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