AI Mentions, Links & Domains Report for Y Combinator
This page provides details about dropbox.com (source) which was ranked #11 out of 141 link domains (9 citations (1.6% share)) in answers from AI models (Perplexity Sonar Pro Search,
Anthropic Claude Sonnet Latest,
OpenAI ChatGPT Latest,
Google Gemini Flash (latest),
xAI Grok Latest) when they were asked the following 2 questions: "What is Y Combinator known for today, and which organizations, products, people, publications, communities, or websites are most closely associated with it? Include direct source links for every notable entity when available.", "What alternatives, competitors, partners, adjacent products, customers, use cases, or ecosystem players are commonly mentioned alongside Y Combinator? Explain the relationship of each one and cite official or high-quality sources." on May 12, 2026 by AICW AI Mentions. This source is referenced for brands: Airbnb, Stripe, Reddit, Dropbox, DoorDash.
| Model | Voice | Position | Citations |
|---|---|---|---|
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3.5% | 20 | 2 |
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2.2% | 25 | 2 |
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1.4% | 12 | 2 |
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0.9% | 34 | 2 |
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0.4% | 22 | 1 |
| URL Path | Citations | Position |
|---|---|---|
| dropbox.com | 9 | 29.4 |
What is Y Combinator known for today, and which organizations, products, people, publications, communities, or websites are most closely associated with it? Include direct source links for every notable entity when available.
[...] 500B+ (private) | S05 | Artificial Intelligence | | [Stripe](https://stripe.com) | $107B (private) | W07, S09 | Payments Infrastructure | | [Coinbase](https://www.coinbase.com) | $86B (public) | S12 | Cryptocurrency | | [DoorDash](https://www.doordash.com) | $39B+ (public) | S13 | Food Delivery | | [Dropbox](https://www.dropbox.com) | $9B (public) | S07 | Cloud Storage | | [Reddit](https://www.reddit.com) | $6.4B (public) | S05 | Social Platform | | [Instacart](https://www.instacart.com) | $10B (public) | S12 | Grocery Delivery | | [Twitch](https://www.twitch.tv) | ~$1B (acquired by Amazon) | W07 | Streaming | | [Scale AI](ht [...]
What is Y Combinator known for today, and which organizations, products, people, publications, communities, or websites are most closely associated with it? Include direct source links for every notable entity when available.
[...] of dollars** --- ## Most Notable Alumni Companies These are among the most famous YC-backed companies: | Company | Domain | |---|---| | [Airbnb](https://www.airbnb.com/) | Hospitality / Travel | | [Stripe](https://stripe.com/) | Payments | | [Reddit](https://www.reddit.com/) | Social Media | | [Dropbox](https://www.dropbox.com/) | Cloud Storage | | [DoorDash](https://www.doordash.com/) | Food Delivery | | [Coinbase](https://www.coinbase.com/) | Crypto Exchange | | [Instacart](https://www.instacart.com/) | Grocery Delivery | | [Twitch](https://www.twitch.tv/) | Live Streaming | | [OpenAI](https://www.openai.com/) | Artific [...]
What alternatives, competitors, partners, adjacent products, customers, use cases, or ecosystem players are commonly mentioned alongside Y Combinator? Explain the relationship of each one and cite official or high-quality sources.
[...] ni (Ecosystem Shapers) These companies are so large they've become ecosystem players themselves: | Company | Batch | Relevance | |---|---|---| | [Airbnb](https://www.airbnb.com/) | W09 | Most-cited YC success story | | [Stripe](https://stripe.com/) | W10 | Payments infrastructure for startups | | [Dropbox](https://www.dropbox.com/) | S07 | Early validation of YC model | | [Reddit](https://www.reddit.com/) | S05 | Acquired by YC then spun out | | [DoorDash](https://www.doordash.com/) | S13 | Major IPO, validates YC food-tech | | [Coinbase](https://www.coinbase.com/) | S12 | Defines YC's crypto credibility | | [OpenAI](https:/ [...]
What is Y Combinator known for today, and which organizations, products, people, publications, communities, or websites are most closely associated with it? Include direct source links for every notable entity when available.
[...] Dash](https://www.doordash.com/) - YC Summer 2013 - YC company page: https://www.ycombinator.com/companies/doordash - [Reddit](https://www.reddit.com/) - One of YC’s earliest and most culturally influential startups - YC company page: https://www.ycombinator.com/companies/reddit - [Dropbox](https://www.dropbox.com/) - YC Summer 2007 - YC company page: https://www.ycombinator.com/companies/dropbox - [Coinbase](https://www.coinbase.com/) - YC Summer 2012 - YC company page: https://www.ycombinator.com/companies/coinbase - [Instacart](https://www.instacart.com/) - YC Summer 2012 - YC company [...]
What alternatives, competitors, partners, adjacent products, customers, use cases, or ecosystem players are commonly mentioned alongside Y Combinator? Explain the relationship of each one and cite official or high-quality sources.
[...] e: https://www.ycombinator.com/companies/coinbase - Instacart - Relationship: YC-backed grocery delivery platform. - Official: https://www.instacart.com/ - YC profile: https://www.ycombinator.com/companies/instacart - Dropbox - Relationship: Frequently cited YC success case. - Official: https://www.dropbox.com/ - YC profile: https://www.ycombinator.com/companies/dropbox - OpenAI - Relationship: Sam Altman (former YC president) became OpenAI CEO; OpenAI’s early structure and leadership are often discussed in YC circles. - Official: https://openai.com/ YC company directory: - https://www.ycombinator [...]
What is Y Combinator known for today, and which organizations, products, people, publications, communities, or websites are most closely associated with it? Include direct source links for every notable entity when available.
[...] ortfolio Companies (Alumni) * **Airbnb:** A global platform for stays and experiences. [airbnb.com](https://www.airbnb.com/) * **Stripe:** A suite of APIs powering online payment processing. [stripe.com](https://www.stripe.com/) * **Dropbox:** A cloud storage and file synchronization service. [dropbox.com](https://www.dropbox.com/) * **Coinbase:** A leading cryptocurrency exchange. [coinbase.com](https://www.coinbase.com/) * **DoorDash:** A local logistics and food delivery platform. [doordash.com](https://www.doordash.com/) * **Instacart:** A grocery delivery and pick-up service. [instacart.com](https://www.instacart. [...]
What alternatives, competitors, partners, adjacent products, customers, use cases, or ecosystem players are commonly mentioned alongside Y Combinator? Explain the relationship of each one and cite official or high-quality sources.
[...] nb**: One of YC's earliest and most valuable successes (W09 batch). * [Airbnb](https://www.airbnb.com/) * **Stripe**: Often cited as the "gold standard" of YC companies (S10 batch). * [Stripe](https://stripe.com/) * **Dropbox**: A quintessential YC success story (S07 batch). * [Dropbox](https://www.dropbox.com/) * **Coinbase**: The most prominent YC alum in the crypto space (S12 batch). * [Coinbase](https://www.coinbase.com/) * [Full list of YC Top Companies](https://www.ycombinator.com/topcompanies) ### 5. Common Use Cases (Why Founders Join) Founders typically cite these specific reasons for [...]
What is Y Combinator known for today, and which organizations, products, people, publications, communities, or websites are most closely associated with it? Include direct source links for every notable entity when available.
[...] continues to publish influential essays on startups): [paulgraham.com](https://paulgraham.com/) - Sam Altman (former YC president; now leads OpenAI): [openai.com](https://openai.com/) ### Prominent YC-Funded Companies (Examples) - [Stripe](https://stripe.com/) - [Airbnb](https://www.airbnb.com/) - [Dropbox](https://www.dropbox.com/) - [Reddit](https://www.reddit.com/) These entities are repeatedly referenced on YC's own site, blog, Hacker News, and Paul Graham's essays. [...]
What alternatives, competitors, partners, adjacent products, customers, use cases, or ecosystem players are commonly mentioned alongside Y Combinator? Explain the relationship of each one and cite official or high-quality sources.
[...] S09/S10); repeatedly referenced when discussing how YC helps infrastructure and fintech startups scale. [Stripe](https://stripe.com/) - **Reddit** and **Dropbox** Early YC companies still used as canonical examples of the program’s track record. [Reddit](https://www.redditinc.com/) [Dropbox](https://www.dropbox.com/) ### Adjacent / Complementary Ecosystem Players - **AngelList** Frequently mentioned together because many YC companies run AngelList syndicates or use the platform for follow-on funding; the two ecosystems overlap heavily. [AngelList](https://angel.co/) - **Startup School (YC’s free onli [...]