75 indexable Digital Publishing Platforms companies headquartered in San Francisco, United States, ranked by total equity funding and recent funding momentum. Combined disclosed equity funding of $2.5B across 39 funded companies, including 2 unicorns.
| # | Company | Funding | Valuation | Stage | Latest round | Employees | Founded | Momentum |
|---|---|---|---|---|---|---|---|---|
| 1 |
Substack
Unicorn Platform allowing writers to publish and monetize their content directly with readers. |
$89.4M | — | Series C | Series C Jul 2025 | 76 | 2017 | ↑ Active |
| 2 |
Reddit
Community based discussion platform |
$1.6B | — | Acquired | Series F May 2023 | 4 | 2005 | — |
| 3 |
Patreon
Unicorn Provider of a reward-based crowdfunding platform for musicians and content creators |
$412.1M | $4B as of 2021 |
Series F | Series F Apr 2021 | 283 | 2013 | — |
| 4 |
Medium
Online publishing platform thet allows users to read and write blogs |
$132M | — | Series C | Series C Nov 2021 | 121 | 2012 | — |
| 5 |
Campuswire
Online platform offering Q&A-based learning solutions |
$32.6M | — | Series A | Series A May 2023 | 9 | 2016 | — |
| 6 |
Radish
Platform for user-submitted serialized fiction stories |
$66.2M | — | Acquired | Series A Jul 2020 | 114 | 2015 | — |
| 7 |
Formspring
Social Q&A portal |
$19.3M | — | Acqui-Hired | Series B Oct 2014 | 32 | 2009 | — |
| 8 |
Pulse
Provider of Q and A platform to enterprises |
$10.6M | — | Series A | Series A Jan 2020 | 75 | 2018 | — |
| 9 |
Threads
Platform offering text-based conversation and community networking solutions |
$10.5M | — | Acquired | Series A Feb 2019 | 23 | 2017 | — |
| 10 |
Posterous
Online blogging platform for users |
$10.1M | — | Acqui-Hired | Series B Sep 2011 | 6 | 2008 | — |
| 11 |
Tapas
Digital platform offering comics, novels, and community for story lovers |
$6.4M | — | Acquired | Series A Mar 2018 | 78 | 2012 | — |
| 12 |
Findery
Provider of a platform for sharing and discovering stories about places |
$11M | — | Series A | Series A Feb 2012 | 2 | 2011 | — |
| 13 |
Storehouse
Mobile game site offering massive wins and friendly user experience |
$8.5M | — | Series A | Series A May 2014 | 6 | 2013 | — |
| 14 |
myWebRoom
Personalized content discovery platform |
$5.6M | — | Deadpooled | Angel Apr 2014 | — | 2011 | — |
| 15 |
KahaniBox
Offering an online interactive storytelling platform |
$1.1M | $3M as of 2021 |
Seed | Seed May 2021 | 8 | 2019 | — |
| 16 |
PublicEarth
Discover curated travel experiences: attractions, restaurants, nightlife, and accommodations |
$4M | — | Deadpooled | Series A May 2010 | — | 2008 | — |
| 17 |
Muzy
Photos collage micro-blogging platform |
$4.4M | — | Deadpooled | Series A Jun 2013 | — | 2011 | — |
| 18 |
Storyboarder
Online platform offering storytelling solutions |
$125K | — | Seed | Seed 2023 | 3 | 2021 | — |
| 19 |
slideshare
SlideShare is an online community that allows users to upload and share PowerPoint presentations, documents, and infographics. |
$3M | — | Acquired | May 2008 | 40 | 2006 | — |
| 20 |
Scoop.it
Content curation and social sharing platform for businesses |
$2.6M | — | Acquired | Series A Jul 2013 | 797 | 2010 | — |
| 21 |
LightPole
Exploring diverse topics from science and culture to travel |
$2.1M | — | Seed | Seed Mar 2008 | — | 2007 | — |
| 22 |
Storify
Social media content curation platform |
$2M | — | Acqui-Hired | Seed Jan 2011 | 11 | 2010 | — |
| 23 |
RateItAll
Rating platform for customers |
$1.4M | — | Deadpooled | Aug 2010 | — | 1999 | — |
| 24 |
Hooked
Mobile app for storytelling |
$1.2M | — | Seed | Seed 2016 | 38 | 2014 | — |
| 25 |
Wiselike
Platform to create personal Q&A pages |
$1.2M | — | Deadpooled | Seed Aug 2015 | 11 | 2015 | — |
| 26 |
GemShare
Online platform sharing content on multiple categories |
$1.2M | — | Seed | Seed Apr 2014 | 7 | 2012 | — |
| 27 |
Tactilize
Corporate gifting and event fringe activities for team building in Singapore |
$1M | — | Deadpooled | Seed Nov 2012 | — | 2011 | — |
| 28 |
Forvm
Image-based Q&A & Sales Lead Generator for products |
$642K | — | Deadpooled | Seed Jun 2013 | — | 2012 | — |
| 29 |
Fluther
Social Q&A portal |
$600K | — | Acquired | Seed Sep 2009 | — | 2007 | — |
| 30 |
Quest
Location-based P2P Q&A app |
$500K | — | Deadpooled | Seed Jan 2014 | — | 2014 | — |
| 31 |
Sponge
Q & A platform for brands, media outlets, and topical sites |
$400K | — | Acqui-Hired | Seed Apr 2010 | — | 2009 | — |
| 32 |
Wevolver
Online media portal focused on engineering & technology |
$290.5K | — | Acquired | Grant (prize money) Jan 2018 | 40 | 2004 | — |
| 33 |
Buy Me A Coffee
Provider of a crowdfunding or tipping platform for creators |
$150K | — | Seed | Seed May 2019 | 41 | 2018 | — |
| 34 |
Squad
App-based social screen sharing platform |
$125K | — | Acqui-Hired | Seed Mar 2018 | 10 | 2016 | — |
| 35 |
Curious Fictions
Online platform allowing users to share short stories |
$120K | — | Deadpooled | Seed Mar 2018 | — | 2016 | — |
| 36 |
MightyQuiz
User generated quizzing platform |
$150K | — | Deadpooled | Seed 2008 | — | 2008 | — |
| 37 |
Biographicon
Wikipedia for biographies |
$125K | — | Seed | Seed 2007 | — | 2007 | — |
| 38 |
Posthaven
SaaS and app-based blogging platform |
$120K | — | Seed | Seed 2013 | — | 2013 | — |
| 39 |
Known
Developer of open source platform for collaborative social publishing and blogging |
$50K | — | Seed | Seed May 2014 | 2 | 2014 | — |
| 40 |
GitHelp
Support platform for dev teams. |
— | — | Seed | Seed 2015 | 2 | 2015 | — |
| 41 |
Hi
Community of readers and writers |
— | — | Deadpooled | Angel 2013 | — | 2013 | — |
| 42 |
Svbtle
Curated blogging publisher |
— | — | Seed | Seed Jan 2013 | — | 2012 | — |
| 43 |
Storie
Domain name sales platform offering quick pricing and expert support |
— | — | Deadpooled | Seed Oct 2011 | — | 2011 | — |
| 44 |
Gokit
Platform to share life experiences through personas |
— | — | Deadpooled | Seed Aug 2011 | — | 2011 | — |
| 45 |
InboxQ
Welding resource offering guides, reviews, and tutorials for enthusiasts and professionals |
— | — | Seed | Seed 2010 | — | 2009 | — |
| 46 |
12fps
12FPS is a creative agency that transcends mediums to promote revolutionary ideas. |
— | — | Private | — | 7 | 2011 | — |
| 47 |
Aardvark
Social search engine for Q&A |
— | — | Acquired | — | 24 | 2007 | — |
| 48 |
Aconite
Developer of immersive games with surreal, near-future, science-fiction storylines |
— | — | Funding Raised | — | 8 | 2016 | — |
| 49 |
Askorty
Video-based QnA platform for public figures to interact with their fans |
— | — | Deadpooled | — | — | 2015 | — |
| 50 |
bold
Bold is a a publishing and editing platform for enterprise. |
— | — | Acquired | — | 4 | 2015 | — |
Substack is a publishing platform that enables independent writers to create and distribute their own newsletters to a global audience, offering a self-serve model for content creation and monetization.
Community based discussion platform. It is a social news and discussion website where users can share and discuss content on various topics and interests. The platform allows users to create and participate in communities of like-minded individuals, fostering discussions, debates, and sharing of knowledge.
Provider of a reward-based crowdfunding platform for musicians and content creators. It allows users to invest in projects to avail returns in the form of pre-sold concert tickets, personal gifts, meet & greets, etc. The backers pledge a fixed amount every month to the chosen project. It is based on the ad revenue and per-stream payouts model. The application can be accessed on iOS and Android devices.
Online publishing platform thet allows users to read and write blogs. It allow users to write, publish, and read articles or blogs on many topics such as technology, business, personal development, and politics. The mobile application is available for Android and iOS users.
Online platform offering Q&A-based learning solutions. It provides a communications platform for colleges & universities. It allows students and professors to post class information, documents, Q&A, announcements, and discussions.
Platform for user-submitted serialized fiction stories. Writers need to apply before being allowed to publish their content. Once verified, they can write, share, and monetize their bite-sized serial fiction stories using a freemium model, and earn an income from their work.
Spring.me formerly Formspring.me is a social Q&A portal. Users of the site can follow others privately. While logged in as a registered user, people can ask questions to his or her followers from the homepage. Spring.me also asks one question per day named "Formspring Question of the Day" which is flashed in user's inbox. Has apps on iOS and Android platforms. Generates most revenue through advertisements.
Provider of Q and A platform to enterprises. The platform provides real time data gathered from executives by improving response rates of surveys and turn surveys into a two way conversations with the customers. It also provides a dashboard with data and analysis.
Platform offering text-based conversation and community networking solutions. It allows users to share ideas, ask questions, post random thoughts, and find communities that match their interests.
Online blogging platform for users. Mobile methods include sending an email, with attachments of photos, MP3s, documents, and video. It allows users to point the DNS listing for a domain name or subdomain they already owned.
Digital platform offering comics, novels, and community for story lovers. It provides a diverse range of content, including action, romance, and fantasy stories, catering to a broad audience of readers and creators. The platform features a subscription model, early access, and free content options, encouraging user engagement and content discovery. It fosters a community through forums and social media integration, a
Provider of a platform for sharing and discovering stories about places. The platform allows users to share their experiences and knowledge related to various locations. It enables users to learn more about places they are interested in. The platform is accessible via applications for multiple operating systems.
Y Combinator
SV Angel
Betaworks
500 Global
Andreessen Horowitz
Greylock Partners
Lowercase Capital
MaC Venture Capital
Redpoint Ventures
TCG Ventures
True Ventures
1435 Capital
Rankings are computed by Radar (Fliar BI) from the Radar company master and are updated periodically. Funding and momentum scores use disclosed equity-funding data only. Figures may lag private rounds. Last updated 2026-06-23.
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