Radar · Digital Publishing Platforms in California
Best Digital Publishing Platforms Companies in California, United States
The 157 best Digital Publishing Platforms companies in California, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Reddit.
By Rohit KhannaTrends & Stories
157companies tracked
$3Bdisclosed funding
3unicorns
70have raised
Ranked: Best Digital Publishing Platforms companies in California
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | App-install YoY | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Reddit Community based discussion platform | $1.6B | 36 mo ago | 4 | Aaron Swartz Co-Founder | WebflowSentryProton Mail+37 | +6% | — | 1 launch |
| 2 | Patreon 🦄 Provider of a reward-based crowdfunding platform for musicians and content creators | $412M | 62 mo ago | 283 | — | Apple iCloud MailGoogle WorkspaceBootstrap+20 | +7% | 69 patents AI-powered recommendation and AR identification systems for creator subscription and benefit platforms | 1 internship |
| 3 | Quora 🦄 Social Q&A community platform | $301M | 29 mo ago | 211 | Adam Angelo Co-Founder & CEO | WordPressMySQLPHP+32 | — | 53 patents Personalized Q&A platform features: user profiling, answer solicitation, and content presentation. | — |
| 4 | Medium Online publishing platform thet allows users to read and write blogs | $132M | 55 mo ago | 121 | Evan Williams Co-Founder & Chairman | MediumApple iCloud MailGoogle Workspace+27 | — | — | — |
| 5 | Substack 🦄 Platform allowing writers to publish and monetize their content directly with readers. | $89M | 11 mo ago | 76 | Jairaj Sethi Co-Founder & CTO | SubstackSentryZendesk+21 | +140% | — | — |
| 6 | Freechat Provider of social networking platform based decentralised algorithms 27Funding top 38%Talent bottom 49%Global bottom 25% All 3 signals ▾Fundingtop 38% Talentbottom 49% Globalbottom 25% Funding: Raised $82.0M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 27/100 | $82M | 29 mo ago | — | Jack Long CEO | — | — | — | — |
| 7 | Radish Platform for user-submitted serialized fiction stories | $66M | 71 mo ago | 114 | — | Proton MailGoogle WorkspaceFacebook Login+11 | — | — | — |
| 8 | JustAnswer Online platform providing expert advice and answers to various questions from verified professionals in… | $51M | 164 mo ago | 1,000 | Andy Kurtzig Founder & CEO | Node.jsBootstrapAmazon Web Services+29 | — | 9 patents Online expert advice platforms: quality control, verification, pricing, and channel management | — |
| 9 | Campuswire Online platform offering Q&A-based learning solutions | $33M | 37 mo ago | 9 | Tade Oyerinde Founder & CEO | SentryZendeskApple iCloud Mail+24 | — | — | — |
| 10 | RemarQ Content aggregator providing internet discussion services for ISPs and user-connected portals | $24M | 326 mo ago | — | Jim Pietrzak CEO & President | — | — | — | — |
| 11 | Formspring Social Q&A portal | $19M | 139 mo ago | 32 | — | — | — | — | — |
| 12 | Piazza Online Q&A platform for students and teachers | $16M | 147 mo ago | 14 | — | Apple iCloud MailMicrosoft 365JW Player+14 | — | 4 patents Patents concentrated in computing, sensing & instrumentation | — |
| 13 | Madefire Storytelling platform using motion books | $15M | 116 mo ago | 7 | — | — | — | — | — |
| 14 | Findery Provider of a platform for sharing and discovering stories about places | $11M | 172 mo ago | 2 | — | — | — | — | — |
| 15 | Pulse Provider of Q and A platform to enterprises | $11M | 77 mo ago | 75 | Victory Jones Co-Founder | — | — | 104 patents Patents concentrated in health & consumer products | — |
| 16 | Threads Platform offering text-based conversation and community networking solutions | $10M | 87 mo ago | 23 | Suman Venkataswamy Co-Founder | HSTSPWAOpen Graph+1 | — | — | — |
| 17 | Posterous Online blogging platform for users | $10M | 177 mo ago | 6 | — | — | — | — | — |
| 18 | Storehouse Mobile game site offering massive wins and friendly user experience | $8M | 144 mo ago | 6 | — | — | — | — | — |
| 19 | Tapas Digital platform offering comics, novels, and community for story lovers | $6M | 99 mo ago | 78 | Chang Kim Founder & CEO | SentryNode.jsJava+20 | — | 16 patents Patents concentrated in health & consumer products | — |
| 20 | Tapatalk Online community app for interest-based discussions | $6M | 142 mo ago | 28 | — | PHPGoogle Sign-inLaravel+21 | +4% | — | — |
| 21 | myWebRoom Personalized content discovery platform | $6M | 146 mo ago | — | Artem Fedyaev Founder & CEO | — | — | — | — |
| 22 | Friend Social Q&A platform | $5M | 185 mo ago | 26 | Ed Baker Co-Founder | — | — | — | — |
| 23 | Muzy Photos collage micro-blogging platform | $4M | 156 mo ago | — | Matt Rubens Co-Founder & CTO | — | — | — | — |
| 24 | Magic Story AI based storytelling platform for children | $4M | 19 mo ago | — | Alex H Co-Founder | ShopifyTurbopackNode.js+32 | — | — | — |
| 25 | PublicEarth Discover curated travel experiences: attractions, restaurants, nightlife, and accommodations | $4M | 192 mo ago | — | Duncan McCall Founder | — | — | — | — |
| 26 | Remento Provider of app-based video capturing platform for the digital publisher | $3M | 45 mo ago | 10 10 → 16 (+60%) | Alexandre Massonneau Co-Founder & CTO | WebflowCart FunctionalitySentry+35 | — | — | — |
| 27 | slideshare SlideShare is an online community that allows users to upload and share PowerPoint presentations, documents… | $3M | 217 mo ago | 40 300 → 389 (+30%) | — | TurbopackSentryNode.js+16 | — | — | — |
| 28 | Scoop.it Content curation and social sharing platform for businesses | $3M | 154 mo ago | 797 | — | WordPressMySQLPHP+28 | — | — | — |
| 29 | LightPole Exploring diverse topics from science and culture to travel | $2M | 219 mo ago | — | Marcus Colombano VP Marketing | — | — | — | — |
| 30 | Storify Social media content curation platform | $2M | 184 mo ago | 11 | — | — | — | — | — |
| 31 | Scribble Story publishing app for children | $2M | 196 mo ago | 11 | Anna Barber Co-Founder & CEO | — | — | 2 patents Color‑detecting digital stylus technology for capturing and reproducing ink hues. | — |
| 32 | RateItAll Rating platform for customers | $1M | 190 mo ago | — | Lawrence Coburn Founder & CEO | Node.jsTailwind CSSVue.js+9 | — | — | — |
| 33 | iFixit Digital platform offering repair guides for various appliances | $1M | 89 mo ago | 138 138 → 271 (+96%) | Kyle Wiens CEO | ShopifySentryApple iCloud Mail+29 | — | 29 patents Repair and maintenance tools for electronic devices, including soldering and hand tool accessories. | — |
| 34 | Balcony Location-based question & answer platform | $1M | 73 mo ago | 12 | David Hammel Founder & CEO | — | +30% | 5 patents Privacy-preserving location-based anonymity and ad‑hoc translation systems | — |
| 35 | Wiselike Platform to create personal Q&A pages | $1M | 129 mo ago | 11 | — | — | — | — | — |
| 36 | Hooked Mobile app for storytelling | $1M | 120 mo ago | 38 | — | Apache HTTP ServerAmazon Web ServicesMailChimp+5 | +1% | — | — |
| 37 | GemShare Online platform sharing content on multiple categories | $1M | 146 mo ago | 7 | — | — | — | — | — |
| 38 | Factery Platform to track interests | $1M | 201 mo ago | — | Paul Pedersen Founder & CEO | — | — | — | — |
| 39 | KahaniBox Offering an online interactive storytelling platform | $1M | 61 mo ago | 8 | Zaid Azmi Founder | — | — | — | — |
| 40 | Shopswell Community recommendation platform | $1M | 126 mo ago | 7 | Gk Parish-Philp Co-Founder | Node.jsGoogle CloudExpress+20 | — | — | — |
| 41 | Tactilize Corporate gifting and event fringe activities for team building in Singapore | $1M | 163 mo ago | — | Nicolas Voisin Founder & CEO | — | — | — | — |
| 42 | Forvm Image-based Q&A & Sales Lead Generator for products | $642K | 156 mo ago | — | Tobias Haag Founder & CEO | — | — | — | — |
| 43 | Fluther Social Q&A portal | $600K | 201 mo ago | — | Ben Finkel Founder & ex-CEO | Google CloudYUIGoogle Tag Manager+5 | — | — | — |
| 44 | PopBase Developer of a platform for interactive content distribution and management | $500K | 68 mo ago | 1 | Lisa Wong Co-Founder & CEO | — | — | — | — |
| 45 | Quest Location-based P2P Q&A app | $500K | 148 mo ago | — | Deepak Ravindran Founder & CEO | — | — | 23 patents Design and manufacturing of beverage bottles and related packaging technologies. | — |
| 46 | Blyve Live Q&A platform for brands | $430K | 221 mo ago | — | Jeffrey Cohen Co-Founder | — | — | — | — |
| 47 | Sponge Q & A platform for brands, media outlets, and topical sites | $400K | 194 mo ago | — | Krutal Desai Founder | — | — | — | — |
| 48 | Wevolver Online media portal focused on engineering & technology | $291K | 101 mo ago | 40 | — | SentryTypeScriptGraphQL+26 | — | — | 2 launchs |
| 49 | Storyboarder Online platform offering storytelling solutions | $125K | 36 mo ago | 3 | Joe Watkins Co-Founder | SentryNode.jsGoogle Sign-in+14 | — | — | — |
Top 12 Digital Publishing Platforms companies in California
#1
Substack 🦄Series C · San Francisco, California · founded 2017 · 76 employees$89.4Mraised▾
Substack 🦄
Series C · San Francisco, California · founded 2017 · 76 employees
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.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 89k LinkedIn followers — 7.0% of this cohort's audience
Funding rounds
- Jul 2025Series C$100M
- May 2023Series B$3.3M
- Mar 2021Series B$65M
- Jul 2019Series A$19.1M
Founders & team
Investors
Andreessen Horowitz, Y Combinator, Zhen Fund, Garage Capital, TCG Ventures, Fifty Years
Tech stack
ActblueAirtableAlpine.JsAmazon AssociatesAppdynamicsBuy Me A Coffee
#2
Acquired · San Francisco, California · founded 2005 · 4 employees$1.6Braised▾
Acquired · San Francisco, California · founded 2005 · 4 employees
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.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 503k LinkedIn followers — 39.5% of this cohort's audience · 169 engagements/post (6.8× cohort median)
Activity: 1 product launches announced in 12 mo
Funding rounds
- May 2023Series F—
- Aug 2021Series F$700M
- Feb 2021Series E$367.9M
- Feb 2019Series D$300M
Founders & team
Investors
Catamaran, Y Combinator, Andreessen Horowitz, Sequoia Capital, Tencent, Fidelity Investments
Tech stack
Amazon S3Amazon SesAmazon Web ServicesApple Icloud MailBabelCloudflare
#3
Quora 🦄Series D · Mountain View, California · founded 2009 · 211 employees$301Mraised▾
Quora 🦄
Series D · Mountain View, California · founded 2009 · 211 employees
Social Q&A community platform. It allows users to ask questions and get answers from community members. Users can ask questions related to any topic, answer questions, follow questions and create blogs on Quora. All questions are tagged with categories. It has mobile apps for iOS and Android.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 105k LinkedIn followers — 8.3% of this cohort's audience
Funding rounds
- Jan 2024Series D$75M
- Apr 2017Series D$85M
- Apr 2014Series C$80M
- May 2012Series B$50M
Founders & team
Investors
Y Combinator, Collab Fund, Benchmark, Tiger Global Management, Matrix, North Bridge Venture Partners
Tech stack
Amazon AlbAmazon AssociatesAmazon Web ServicesAosAzure Edge NetworkCart Functionality
#4
Seed · Los Angeles, California · founded 2023$4Mraised▾
Seed · Los Angeles, California · founded 2023
AI based storytelling platform for children. Users can access digital versions of personalized stories purchased through their website, featuring their child and various characters. Available on iOS devices.
Funding rounds
- Nov 2024Seed$4M
Founders & team
Investors
Point72 Ventures, The House Fund, Ritual Capital
Tech stack
AmplitudeCart FunctionalityClerkCloudflareCloudflare Bot ManagementCloudflare Browser Insights
#5
Series A · Los Angeles, California · founded 2020$82Mraised▾
Series A · Los Angeles, California · founded 2020
Provider of social networking platform based decentralised algorithms. It is a social application that enables users to communicate through text, video and voice call, images, and more. It offers tools such as tweeting, creating groups, generating videos, ad interactions, crypto based wallet, live streaming and allows users to earn coins using short videos, and more.
Fliar Intelligence Index™ 27how this company ranks against its industry peers
Funding
top 38%Talent
bottom 49%Global
bottom 25%Funding: Raised $82.0M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) · Last round Series A (Jan 2024)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Global: Single-market focus (United States)
Funding rounds
- Jan 2024Series A$80M
- Seed$2M
Founders & team
#6
Patreon 🦄Series F · San Francisco, California · founded 2013 · 283 employees$412.1Mraised▾
Patreon 🦄
Series F · San Francisco, California · founded 2013 · 283 employees
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.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 75k LinkedIn followers — 5.9% of this cohort's audience
Funding rounds
- Apr 2021Series F$155M
- Sep 2020Series E$90M
- Jul 2019Series D$60M
- Sep 2017Series C$60M
Founders & team
Investors
New Enterprise Associates, Wellington, Glade Brook Capital, Thrive Capital, DFJ Growth, Index Ventures
Tech stack
Alpine.JsAmazon CloudfrontAmazon Web ServicesApolloApple Icloud MailAtlassian Statuspage
#7
Series C · San Francisco, California · founded 2012 · 121 employees$132Mraised▾
Series C · San Francisco, California · founded 2012 · 121 employees
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.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 215k LinkedIn followers — 16.9% of this cohort's audience
Funding rounds
- Nov 2021Series C$31M
- Apr 2016Series C$50M
- Sep 2015Series B$57M
- Jan 2014Series A$25M
Founders & team
Investors
Greylock Partners, Obvious Ventures, Andreessen Horowitz, Google Ventures, TCG Ventures, Code Advisors
Tech stack
Alpine.JsAmazon AssociatesAmazon SesAmazon Web ServicesApolloApple Icloud Mail
#8
Series A · San Francisco, California · founded 2016 · 9 employees$32.6Mraised▾
Series A · San Francisco, California · founded 2016 · 9 employees
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.
Funding rounds
- May 2023Series A$29M
- Oct 2019Series A$3.6M
Founders & team
Investors
Bloomberg Beta, Founders Fund, Rethinkeducation, Reach Capital, Precursor Ventures, Rethink Capital Partners
Tech stack
Apple Icloud MailCloudflareCloudflare Bot ManagementCore-JsDatadogDocusign
#9
Acquired · San Francisco, California · founded 2015 · 114 employees$66.2Mraised▾
Acquired · San Francisco, California · founded 2015 · 114 employees
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.
Funding rounds
- Jul 2020Series A$63.2M
- Jan 2017Seed$3M
Investors
Mirae Asset, Mirae Asset Capital Markets, Partners Investment, Daekyo Investment, Kakao, SBVA
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesCore-JsFacebook LoginGoogle Analytics
#10
Seed · San Mateo, California · founded 2023$20Kraised▾
Seed · San Mateo, California · founded 2023
AI-powered platform for creating stories. It allows you to create stories related to multiple genres, craft characters, edit scenes and texts, and more.
Funding rounds
- Nov 2024Seed$30K
- Mar 2024Seed$20K
Founders & team
Investors
Techstars
#11
Series B · Covina, California · founded 2003 · 1000 employees$50.7Mraised▾
Series B · Covina, California · founded 2003 · 1000 employees
Online platform providing expert advice and answers to various questions from verified professionals in different fields. It connects users with verified professionals across many fields, such as law, medicine, veterinary care, tech support, and home services, via chat, phone, or text.
Funding rounds
- Oct 2012Series B$25.7M
- Jun 2012Series A$25M
Founders & team
Investors
Crosslink Capital, Glynn Capital, Charles Schwab
Tech stack
AdrollAdroll Cmp SystemAlpine.JsAmazon AlbAmazon S3Amazon Web Services
#12
Seed · Los Angeles, California · founded 2021 · 10 employees$3Mraised▾
Seed · Los Angeles, California · founded 2021 · 10 employees
Provider of app-based video capturing platform for the digital publisher. It offers solutions such as story recording, editing, adding prompts, and more. The mobile application is available for iOS users.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 2k LinkedIn followers
Funding rounds
- Sep 2022Seed$3M
Founders & team
Investors
Upfront Ventures, Alumni Ventures, Also Capital
Tech stack
ApplovinBootstrapCart FunctionalityCloudflareCloudflare Bot ManagementCore-Js
Funding & investor landscape
$3Btotal disclosed funding
62companies funded
119disclosed rounds
0rounds last 90 days
Most active investors
Y Combinator14 rounds
SV Angel7 rounds
Betaworks5 rounds
Notable founders
Jairaj Sethi
Co-Founder & CTO · Substack
Hamish McKenzie
Co-Founder · Substack
Aaron Swartz
Co-Founder · Reddit
Adam Collins
CCO · Reddit
Adam Angelo
Co-Founder & CEO · Quora
Hwan Yeo
Director Of Engineering · Quora
Alex H
Co-Founder · Magic Story
Erik Ober
Co-Founder & CEO · Magic Story
Jack Long
CEO · Freechat
Sam Yam
Co-Founder · Patreon
Jack Conte
Co-Founder & CEO · Patreon
Evan Williams
Co-Founder & Chairman · Medium
Prism market signals · United States · country-scoped Prism corpus, 14,915,345 docs
Market landscape — 10 sub-themes by coverage
Share of Digital Publishing Platforms coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
Common questions
How many Digital Publishing Platforms companies are there in California, United States?
Radar tracks 157 indexable Digital Publishing Platforms companies headquartered in California, United States that meet our profile-completeness bar.
What is the total funding raised by Digital Publishing Platforms companies in California, United States?
The Digital Publishing Platforms companies in California, United States on this list have raised a combined $3B in disclosed equity funding across 62 funded companies.
Which is the highest-funded Digital Publishing Platforms company in California, United States?
Reddit is the highest-funded Digital Publishing Platforms company in California, United States, with $1.6B in disclosed equity funding.
How many Digital Publishing Platforms companies in California, United States are funded?
62 of the 157 Digital Publishing Platforms companies in California, United States on this list have disclosed at least one equity funding round.
How many Digital Publishing Platforms unicorns are there in California, United States?
3 Digital Publishing Platforms companies in California, United States on this list are valued at $1B or more.
Who are the top investors in California, United States Digital Publishing Platforms companies?
The most active investors in California, United States Digital Publishing Platforms companies on this list include Y Combinator, SV Angel, 500 Global, Andreessen Horowitz, Betaworks.
Rohit KhannaTrends & Stories
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.