r/tipofmytongue vs r/whatisthisthing

Side-by-side using public descriptions, members, growth and rule titles from SubMouse. Missing fields show as n/a. Adult communities are excluded.

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Forgotten titles vs mystery object IDs

r/tipofmytongue helps you find un-Googleable things on the tip of your tongue—a word, song, movie title. r/whatisthisthing is for identifying mysterious physical objects.

Both are live directory communities with SubMouse pages (tipofmytongue about 2.7M, rank #409; whatisthisthing about 3.2M, rank #331). Activity samples diverge sharply: tipofmytongue is text-heavy and very busy in our window (roughly 265 posts per day); whatisthisthing is image/gallery-led (roughly 55 posts per day).

Collected short rule titles share a Solved! culture but differ on content. tipofmytongue bans people-identification posts and has music-specific rules; whatisthisthing asks for detail and images, bans joke answers and AI-generated answers, and expects Solved! replies. Bring a half-remembered media or phrase to tipofmytongue; bring a photo of an unknown object to whatisthisthing.

r/tipofmytongue: forgotten titles/phrases; text requests; reply Solved! (collected titles).
r/whatisthisthing: mystery objects; image/gallery posts; no joke or AI answers (collected titles).
Same solve ritual, different evidence. Both have full SubMouse community pages.

Written comparison based on public descriptions and rule titles · updated 2026-11-06.

r/tipofmytongue

TOMT: When you can't remember that…thing…

For finding the un-googleable things that are on the tip of your tongue... That word... The name of that song... That movie...

Members: 2.7M
7-day growth: +1.3K
Posts/day: 264.8
Directory rank: #409
Created: Aug 12, 2009
Submissions: Text posts

Sample mix: text posts 100%

Rule titles (short names we collected)

Be civil and respectful to each other.
No arbitrary link titles (How to answer including a link)
Do not repeat something already suggested.
Reply “Solved!” to the first correct answer
Do not delete post/answer
No reposting within one week.
Music posts
No People
Nothing Illegal
Post format
No bribes
Participation

Open r/tipofmytongue on SubMouse

r/whatisthisthing

For the identification of mysterious objects

Members: 3.2M
7-day growth: +1.3K
Posts/day: 55
Directory rank: #331
Created: Sep 5, 2010
Submissions: Link posts

Sample mix: galleries 57%, images 40%, text posts 2%

Rule titles (short names we collected)

Be civil
Be helpful / No Jokes
Try to include a link...
Reply "Solved!"
DO NOT DELETE YOUR POST
Be detailed
Do not post AI generated answers.
Do not use URL shorteners or tracking links
Check the F.A.T.
Posts must adhere to submission guidelines

Open r/whatisthisthing on SubMouse

Supported differences

Aspect	r/tipofmytongue	r/whatisthisthing
Public focus (from each community’s public description)	For finding the un-googleable things that are on the tip of your tongue... That word... The name of that song... That movie...	For the identification of mysterious objects
Size r/whatisthisthing is larger in our directory.	2.7M members	3.2M members
Posting activity (our sample)	264.8/day	55/day
Common post types in our sample	text posts 100%	galleries 57%, images 40%, text posts 2%
Allowed submission type (meta)	Text posts	Link posts
Selected rule titles (short names we collected)	Be civil and respectful to each other.; No arbitrary link titles (How to answer including a link); Do not repeat something already suggested.; Reply “Solved!” to the first correct answer; Do not delete post/answer	Be civil; Be helpful / No Jokes; Try to include a link...; Reply "Solved!"; DO NOT DELETE YOUR POST

Rules and tone we can verify

tipofmytongue: be civil; no arbitrary link titles; do not repeat suggestions; reply Solved!; do not delete; no reposting within one week; music posts; No People. whatisthisthing: be civil; be helpful / no jokes; include a link when useful; reply Solved!; do not delete; be detailed; no AI-generated answers; no URL shorteners/tracking links.

Where this comparison comes from

Public descriptions and member counts from SubMouse’s safe-for-work directory. Short rule titles and activity samples collected for both. Short titles only.

Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and post-type mixes appear when we have an activity sample. Rule lines are short titles, not the full sidebar. Directory rank is listing order — communities outside the current Top 100 open in the info tool instead of a full community page.