StumbleUpon
E227393
StumbleUpon was a popular discovery and recommendation platform that let users "stumble" through personalized web content based on their interests.
All labels observed (2)
| Label | Occurrences |
|---|---|
| StumbleUpon canonical | 4 |
| StumbleUpon discovery platform | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2016889 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: StumbleUpon Context triple: [Garrett Camp, founded, StumbleUpon]
-
A.
del.icio.us
del.icio.us was a pioneering social bookmarking web service that allowed users to save, tag, and share links online.
-
B.
Diigo
Diigo is a social bookmarking and web annotation service that lets users save, tag, highlight, and share online resources.
-
C.
Periscope
Periscope was a live video streaming mobile app that allowed users to broadcast and watch real-time video from around the world.
-
D.
Tumblr
Tumblr is a microblogging and social networking platform known for its highly customizable blogs, fandom communities, and viral multimedia content.
-
E.
Pinterest
Pinterest is a visual discovery and bookmarking platform where users save and organize images and ideas into themed collections called boards.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: StumbleUpon Target entity description: StumbleUpon was a popular discovery and recommendation platform that let users "stumble" through personalized web content based on their interests.
-
A.
del.icio.us
del.icio.us was a pioneering social bookmarking web service that allowed users to save, tag, and share links online.
-
B.
Diigo
Diigo is a social bookmarking and web annotation service that lets users save, tag, highlight, and share online resources.
-
C.
Periscope
Periscope was a live video streaming mobile app that allowed users to broadcast and watch real-time video from around the world.
-
D.
Tumblr
Tumblr is a microblogging and social networking platform known for its highly customizable blogs, fandom communities, and viral multimedia content.
-
E.
Pinterest
Pinterest is a visual discovery and bookmarking platform where users save and organize images and ideas into themed collections called boards.
- F. None of above. chosen
Statements (57)
| Predicate | Object |
|---|---|
| instanceOf |
defunct website
ⓘ
social bookmarking service ⓘ social discovery platform ⓘ web recommendation service ⓘ |
| acquiredBy | eBay ⓘ |
| acquisitionAmount | 75,000,000 USD ⓘ |
| acquisitionDate | 2007-05 ⓘ |
| businessModel |
advertising-supported
ⓘ
freemium ⓘ |
| CEO | Garrett Camp ⓘ |
| coFounder |
Eric Boyd
ⓘ
Garrett Camp ⓘ Geoff Smith ⓘ Justin LaFrance ⓘ |
| contentTypesRecommended |
blogs
ⓘ
news articles ⓘ photos ⓘ videos ⓘ web pages ⓘ |
| countryOfOrigin | Canada ⓘ |
| founder |
Eric Boyd
ⓘ
Garrett Camp ⓘ Geoff Smith ⓘ Justin LaFrance ⓘ |
| foundingDate | 2001 ⓘ |
| headquartersLocation |
San Francisco
ⓘ
surface form:
San Francisco, California, United States
|
| industry |
internet
ⓘ
online advertising ⓘ social media ⓘ |
| keyFeature |
Stumble button for random content discovery
ⓘ
browser toolbar integration ⓘ personalized recommendation algorithm ⓘ social sharing of discovered pages ⓘ thumbs-up and thumbs-down rating system ⓘ topic-based channels ⓘ user interest tagging ⓘ |
| logo | StumbleUpon logo ⓘ |
| notableFor |
early personalized content recommendation on the web
ⓘ
popularizing random web page discovery via a single button ⓘ |
| operatingSystemSupport | cross-platform via web browser ⓘ |
| ownershipChange | spun out from eBay in 2009 ⓘ |
| peakUserCountTime | around 2012 ⓘ |
| platform |
Android
ⓘ
browser extension ⓘ iOS ⓘ web ⓘ |
| primaryLanguage | English ⓘ |
| serviceType |
content discovery
ⓘ
personalized recommendations ⓘ social networking ⓘ |
| shutdownDate | 2018-06-30 ⓘ |
| status | discontinued ⓘ |
| successor | Mix ⓘ |
| successorFoundedBy | Garrett Camp ⓘ |
| successorPlatformURL | https://mix.com ⓘ |
| userCount | over 25 million registered users ⓘ |
| website | https://www.stumbleupon.com ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: StumbleUpon Description of subject: StumbleUpon was a popular discovery and recommendation platform that let users "stumble" through personalized web content based on their interests.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
StumbleUpon discovery platform
subject surface form:
Garrett Camp