Top 100 YC Companies by

Number of other domains with at least one link to any page on the company's domain. Source: Moz.

Chart Domains Linking for All Companies Chart Domains Linking vs. Other Metrics
Rank Name Batch Category Description Domains Linking
1 Reddit S05 Entertainment The frontpage of the internet. 6,468,508
2 Dropbox S07 Other SaaS Backup and share files in the cloud. 939,991
3 Disqus S07 Dev Tools Add comments to your website. 923,340
4 Imgfave S12 Entertainment A fun image sharing community. 891,532
5 Scribd S06 Entertainment World's largest online library. 647,942
6 Posterous S08 Entertainment Dead simple blogs by email 500,977
7 Twitch W07 Entertainment Video game live streaming 296,691
8 Strikingly W13 Other SaaS The easiest way to create a beautiful, mobile optimized website. 215,967
9 Wufoo W06 Other SaaS Online form builder. 185,489
10 9gag S12 Entertainment Make the world happier. 179,521
11 Airbnb W09 Consumer Book accommodations around the world 166,914
12 Docker S10 Other SaaS App store for server configurations. 151,655
13 Bitnami W13 Other SaaS The App Store for Server Software 124,227
14 Genius S11 Entertainment Music Intelligence 117,147
15 Stripe S09 Fintech Online payments. 115,078
16 GitLab W15 Dev Tools GitLab is a complete DevOps platform, delivered as a single application. 110,254
17 Codecademy S11 Education Codecademy teaches the world the skills they need to find jobs 102,425
18 1000Memories S10 Consumer Memorial sites. 98,394
19 MatterPort W12 Entertainment Turn physical objects and environments into 3D models in seconds. 95,972
20 ACLU W17 Nonprofit Defender of rights and liberties 94,537
21 Y Combinator S05 Not your average fixed point combinator. 92,471
22 Padlet W13 Other SaaS Papyrus β†’ Parchment β†’ Paper β†’ Padlet 82,088
23 Creative Market W10 Dev Tools Marketplace for ready-to-use design assets from independent creators around the world. Acquired by A... 81,791
24 Teespring W13 Consumer Retail quality products on-demand. Teespring is a platform that enables anyone to create and sell un... 81,360
25 Coinbase S12 Fintech Coinbase is a secure platform that makes it easy to buy and sell cryptocurrency 64,884
26 Font Awesome S15 Dev Tools Icons and social logos for your website. 62,323
27 Webflow S13 Dev Tools Professional website design and publishing platform. 50,869
28 Coub S16 Entertainment Coub is YouTube for video loops. You can take any video from YouTube, Facebook or upload your own. T... 49,074
29 Olark W09 Other SaaS The best live chat software on the planet. We help you build relationships with website visitors, b... 44,667
30 Tech in Asia W15 Entertainment Tech in Asia (YC W15) is the largest English-language technology media company that focuses on Asia. 42,651
31 Product Hunt S14 Entertainment Hacker News for Products 42,556
32 Heroku W08 Other SaaS Heroku is a multi-language cloud application platform that enables developers to deploy, scale, and manage their applications. 42,471
33 The Muse W12 Other SaaS The Muse is the ultimate career destination offering exciting job opportunities, expert advice, and ... 41,488
34 Zapier S12 Other SaaS The easiest way to automate your work 40,205
35 Authy W12 Dev Tools Authy is a Two-Factor Authentication platform for developers 38,128
36 DailyBooth S09 Entertainment The daily picture taking social network. 35,315
37 Songkick S07 Consumer Songkick is a ticketing vendor and online database of concerts for music enthusiasts. 32,361
38 Our World in Data W19 Education Research and data to make progress against the world’s largest problems 31,207
39 DoorDash S13 Consumer Restaurant delivery. 28,921
40 Substack W18 Other SaaS A place for independent writing 25,354
41 Mixpanel S09 Other SaaS Mixpanel is the most advanced analytics platform in the world for mobile & web. 24,729
42 Project Wedding W06 Consumer Finding wedding vendors is hard. In 2007, a couple started Project Wedding to tackle this problem and eventually grew it into a 23,019
43 Optimizely W10 Dev Tools A/B testing. 22,873
44 The Athletic S16 Entertainment Subscription sports media. 22,142
45 SmartAsset S12 Fintech The easiest way to make and understand important personal finance decisions. 20,579
46 RescueTime W08 Other SaaS Ridiculously Easy Time Management 19,731
47 Svbtle S12 Entertainment A publishing platform. 19,639
48 Instacart S12 Consumer The North American leader in online grocery 18,834
49 HackerRank S11 Other SaaS Programmer IQ 18,339
50 Submittable S12 Dev Tools Submittable is the best way for organizations to create, promote, and manage their calls for submiss... 17,398
51 Priceonomics W12 Other SaaS We help companies turn their data into great stories. 15,816
52 Ninite W08 Other SaaS Simple third-party app patching and deployment for Windows. 15,570
53 OpenAI S16 Dev Tools OpenAI is a non-profit artificial intelligence research company that discovers the path to safe artificial general intelligence. 15,285
54 Lever S12 Other SaaS Lever is a Talent Acquisition Suite that combines ATS + Talent CRM 14,665
55 Vidyard S11 Other SaaS Video for business 14,231
56 Listia S09 Consumer Mobile marketplace for trading used goods. 14,175
57 Embedly W10 Dev Tools Embedly helps publishers and consumers manage embed codes from more than hundred websites and APIs. 14,058
58 Shoptiques W12 Consumer lets you shop the world's best local boutiques online. 13,964
59 LendEDU W16 Education LendEDU is a marketplace for consumer financial products. 13,611
60 Casetext S13 Other SaaS We make the world's laws free and understandable. 13,471
61 Hipmunk S10 Consumer Hipmunk takes the agony out of searching for flights, accommodations, cars, and more. 13,418
62 Lanyrd W11 Consumer IMDB of conferences. 13,342
63 Weebly W07 Other SaaS Web site editing platform. Over 40M people have launched their business on Weebly and every month 3... 12,434
64 Loom W12 Entertainment Cloud storage for photos and videos (acquired by Dropbox). 12,172
65 Buy Me A Coffee W19 Entertainment Helping creators monetize 11,587
66 Poll Everywhere S08 Other SaaS Interactive meetings and presentations 11,512
67 NewsBlur S12 Entertainment NewsBlur is an RSS news reader with intelligence. 11,439
68 Mailgun W11 Dev Tools Email API service. 11,069
69 WePay S09 Fintech Payments for platform businesses. 10,560
70 GoCardless S11 Fintech The first global network for recurring payments 10,336
71 Posthaven S05 Entertainment Blogging forever 10,185
72 W18 Dev Tools In 2 seconds, boot up an online programming environment for your favorite language. 10,019
73 Algolia W14 Dev Tools Algolia offers a developer-friendly and enterprise-grade search API 9,820
74 Clever S12 Education Clever is the platform that powers technology in the classroom. 9,727
75 Gusto W12 Other SaaS Gusto is a modern, online people platform that helps small businesses take care of their teams. 9,673
76 S14 Entertainment Quora/Cosmo for women 9,671
77 Cratejoy S13 Other SaaS Cratejoy is the platform for subscriptions 9,583
78 StatusPage S13 Dev Tools The best way to communicate with users around downtime. 9,562
79 InfluxData W13 Other SaaS InfluxData is building the platform for collecting, storing, visualizing, and processing time series... 9,494
80 BuildZoom W13 Consumer BuildZoom is a better way to remodel. We connect homeowners to the most reliable general contractors... 9,401
81 Segment S11 Other SaaS Segment is the analytics infrastructure that helps collect and organize data so businesses make bett... 9,296
82 YourMechanic W12 Consumer Car Repairs, Reinvented:a. Mechanic comes to your home or work to fix your carb. Save 20-30% by work... 9,280
83 Octopart W07 Industrial Octopart is a search engine for electronic components 9,202
84 Wefunder W13 Fintech Kickstarter for equity. We let anyone invest as little as $100 in startups. We connect startups wi... 8,818
85 CoreOS S13 Other SaaS Enterprise Linux distribution that dramatically improves security and speed of application deploymen... 8,784
86 Experiment W13 Healthcare crowdfunding platform for science 8,592
87 Vayable S12 Consumer We're building a marketplace for unique travel experiences (it's AirBnB for the part of your vacatio... 8,585
88 CodeCombat W14 Education Game that teaches computer science to middle and high school kids. 8,412
89 UpLabs W16 Dev Tools UpLabs is the #1 marketplace for designers & developers to find design resources. 8,397
90 Breaker W17 Entertainment A podcast company. 8,169
91 Mattermost S12 Other SaaS Open source, self-hosted Slack-alternative 8,003
92 Platzi W15 Education Effective online education of coding, marketing and design. Largest player in Latinamerica. 7,972
93 OwnLocal W10 Other SaaS OwnLocal automates marketing for over 129,000 SMBs through 3,300 local media partners in North Ameri... 7,902
94 Heyzap W09 Entertainment Heyzap (acquired by Fyber for $45m in 2016) is one of the largest mobile mediation providers. 7,832
95 7cups S13 Healthcare 7 Cups is an emotional support service that matches up people that need support with active listener... 7,818
96 OneSignal S11 Dev Tools Making engagement simple across push notifications, in-app, and email. 7,760
97 Pushbullet W14 Consumer Push things to your other things. 7,661
98 Parse S11 Dev Tools Parse is the easiest way to build apps. 7,633
99 AirHelp W14 Consumer AirHelp helps air passengers get compensation for delayed, cancelled and overbooked flights. Proud t... 7,439
100 Expo S16 Other SaaS Expo brings together the best of web (development speed, fast iteration cycles, easy deploys, and au... 7,397