
MightyQuiz
What they do:
MightyQuiz powers a collection of user generated quiz questions that can be answered and rated on-site or through a distributable widget.
Quick facts:
HQ: San Francisco, CA, United States
This list has 1,440 startups and was last updated on Oct 15, 2026. 246 of them are hiring right now. Biggest hubs: San Francisco (868), New York (250), and Los Angeles (81). Largest teams: DoorDash, Airbnb, and GrubMarket. Latest round: Astraea, Inc./DE raised $175K (Oct 14, 2026).

What they do:
MightyQuiz powers a collection of user generated quiz questions that can be answered and rated on-site or through a distributable widget.
Quick facts:
HQ: San Francisco, CA, United States

What they do:
Online mixtape service (create and share mixtapes). Launched as part…
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HQ: San Francisco, CA, United States
What they do:
Kirkland North is taking an infectious campus-wide game that it ran at Yale and Harvard last year and spreading it to other campuses around the country. The…
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HQ: San Francisco, CA, United States

What they do:
Deluux aims to become distributed Facebook, or inverted Ning, by relocating the center of people's online identities to their websites, which exist outside of…
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HQ: Atlanta, GA, United States
What they do:
YumDots wants to be the go-to mobile application for finding places to eat when out on the town. Its emphasis on using interactive maps to display information…
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HQ: San Francisco, CA, United States

What they do:
Bountii is a price search startup that has built a search engine capable of finding shoppers lower and more accurate prices than any existing price comparison…
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HQ: Boston, MA, United States

What they do:
iJigg is a social music site that lets users vote on submitted singles using Digg-like voting. The site's home page shows what popular or recent singles the…
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HQ: San Francisco, CA, United States

What they do:
SocialPicks was a platform where stock investors could exchange…
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HQ: New York, NY, United States
What they do:
P2P Music Sharing
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HQ: Boston, MA, United States

What they do:
Fuzzwich is an online animation platform developed by Habit Industries.
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HQ: San Francisco, CA, United States
What they do:
Messaging.
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HQ: Boston, MA, United States
What they do:
Writewith is a collaborative writing web app, enabling you to easily flow through the steps of writing, editing, and publishing a document with a group. A…
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HQ: Corvallis, OR, United States
What they do:
Whitenoise is like a social network for the music industry. It comes with specially made tools for bands, agents, publicists, and venues to manage each part…
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HQ: San Francisco, CA, United States

What they do:
Socialmoth is a community to post your thoughts anonymously. You can view postings (mostly gossip and secrets) from the whole community as well as get updates…
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HQ: San Francisco, CA, United States

What they do:
Jamglue is an online community allowing users to listen or mix music from a library of user-contributed music.
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HQ: Seattle, WA, United States

What they do:
An online personality test game, where you look at two photos and choose which one you “Like Better”.
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HQ: San Francisco, CA, United States
What they do:
A platform bridging mobile text messages, email, and IM communication without needing to download anything. Users can send mass messages on any of the…
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HQ: San Francisco, CA, United States
What they do:
Flagr enables users to share places, adding photos, video and descriptions from their mobile phone. They can then create maps and embed them on any website.
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HQ: NY, United States

What they do:
Mobile travel guides done right. Personalized, context-aware, and…
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HQ: San Francisco, CA, United States

What they do:
A fun image sharing community.
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HQ: San Francisco, CA, United States

What they do:
API for video.
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HQ: San Francisco, CA, United States
What they do:
Hiptype is a marketing and analytics platform for eBooks. We can…
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HQ: San Francisco, CA, United States

What they do:
Kippt is a social bookmarking service
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HQ: San Francisco, CA, United States

What they do:
Finder for the Cloud
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HQ: San Francisco, CA, United States
What they do:
Clip and share any video from any website.
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HQ: San Francisco, CA, United States

What they do:
viaCycle makes simple, inexpensive bicycle sharing systems that allow…
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HQ: Atlanta, GA, United States

What they do:
Scoutzie is a curated community for the best mobile designers. If…
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HQ: San Francisco, CA, United States

What they do:
Kickstarter for physical products. Shop exclusive product launches.
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HQ: San Francisco, CA, United States

What they do:
Educational assessments made easy. Eliminating paper-based exams in…
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HQ: San Francisco, CA, United States

What they do:
Music, Metrics... Meritocracy. (Upload Music, Connect your Social…
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HQ: Atlanta, GA, United States

What they do:
Stop missing deliveries. Ship to Swapbox and pick up at our kiosks.
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HQ: San Francisco, CA, United States
What they do:
Ultra-short feedback surveys on tablets mounted in businesses. Higher…
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HQ: San Francisco, CA, United States
What they do:
[Now Clara, YC S14- claralabs.com]
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HQ: San Francisco, CA, United States

What they do:
Graft Concepts makes unique iPhone cases and other mobile accessories
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HQ: San Francisco, CA, United States
What they do:
Web marketing for SMBs & merchants associations.
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HQ: San Francisco, CA, United States
What they do:
Videos of your iOS apps
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HQ: San Francisco, CA, United States