At Best Startup California we track over 300,000 Californian startups and over 1,500,000 people who hold key positions in these companies. We use this directory of startups to highlight top employees, founders and organisations we think deserve more appreciation than they are currently getting.
We’ve ranked the top 49 Browser Extensions companies in California, United States. The companies, startups and institutions listed in this article are all exceptional companies, well worth a follow. We have included links to their websites, socials and CrunchBase (if you’re interested in their financials).
We selected the organisations listed in this article based on:
- Track record
- Executive leadership
- Market share
- Innovation
- ESG rating
Our Data – We source our data from OSINT (open source intelligence) and public directories such as Crunchbase, SemRush and many more. The data from these sources should be treated with a degree of caution and verified yourself.
Top Browser Extensions Companies & Startups (California, United States)
Mozilla
Mozilla provides internet solutions and offers Firefox, Thunderbird, and Raindrop.
Founder(s): Blake Ross, Dave Hyatt
Location: Mountain View, California, United States
Industries: Browser Extensions, Internet, Open Source, Software, Web Browsers
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Pocket is an application that allows users to save and retrieve documents and videos from websites.
Founder(s): Nate Weiner
Location: San Francisco, California, United States
Industries: Browser Extensions, Internet, Social Bookmarking, Web Browsers
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ShopCo Technologies
ShopCo Technologies is the parent company of the Shop.co universal cart browser extension.
Founder(s): Jay Habib, Manuel Schobel
Location: San Francisco, California, United States
Industries: Artificial Intelligence, Browser Extensions, E-Commerce, Information Technology, Internet, Shopping, Web Apps
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myWebRoom
myWebRoom, an online platform, enables its users to organize their collection of articles, videos, and other content in a virtual room.
Founder(s): Artem Fedyaev, John Gonzalez
Location: San Francisco, California, United States
Industries: Browser Extensions, Cloud Computing, E-Commerce, Interior Design, Social Bookmarking
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Encarte
Encarte is a browser extension bringing one-click checkout to any e-commerce store.
Founder(s): George Fang, John Ling
Location: San Francisco, California, United States
Industries: Browser Extensions, E-Commerce, Internet
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CatalyzeX
Productivity tools for machine learning R&D
Founder(s): Gaurav Ragtah, Himanshu Ragtah
Location: San Francisco, California, United States
Industries: Artificial Intelligence, Browser Extensions, Developer Tools, Machine Learning, Productivity Tools
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Trove
Chrome extension that allows you to annotate the internet.
Founder(s): Akshath Sivaprasad, Ali Ahmed
Location: San Francisco, California, United States
Industries: Browser Extensions, Social, Software
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AdBlock
AdBlock is a browser extension that blocks advertisements, malware, and tracking activities on Google Chrome.
Founder(s):
Location: San Francisco, California, United States
Industries: Advertising, Browser Extensions, Information Technology, Software
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Guidde
Guidde provides application and browser extension solutions.
Founder(s): Dan Sahar, Yoav Einav
Location: Belmont, California, United States
Industries: Browser Extensions, Consumer Applications, Information Technology, Knowledge Management
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Arrow AI
Arrow AI provides channel browsing, content sharing, post boosting, SaaS, tools, and social media marketing services.
Founder(s): Rolan Reichel
Location: San Francisco, California, United States
Industries: Advertising, Browser Extensions, Marketing
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Threadloom
Product discovery, Shopping, Search, Newsletters
Founder(s): Greg Hecht, Paul Lee
Location: Mountain View, California, United States
Industries: Browser Extensions, Consumer Reviews, Email Marketing, Information Services, Internet, Shopping
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Click To Donate
Non-profit Fundraising and browse add on
Founder(s):
Location: Santa Monica, California, United States
Industries: Browser Extensions, Charity, Non Profit
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Flock, Inc.
Flock is a web browser providing social networking and Web 2.0 facilities.
Founder(s): Bart Decrem, Geoffrey Arone, Stefan Nikolic
Location: Menlo Park, California, United States
Industries: Browser Extensions, Social Media, Software
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Flow
Flow is building products for improving its users’ web browsing experience.
Founder(s):
Location: San Francisco, California, United States
Industries: Browser Extensions, Internet, Web Apps, Web Browsers
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SpinPunch
SpinPunch develops browser-based, real-time strategy games.
Founder(s): Ian Tien
Location: Palo Alto, California, United States
Industries: Apps, Browser Extensions, Gaming, Internet, PC Games, Web Development
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64 Pixels
64 Pixels made some of the first products on the facebook, iphone, and google chrome platforms.
Founder(s): Zach Allia
Location: Mountain View, California, United States
Industries: Browser Extensions, Social Media
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Zenbox
Zenbox is a browser extension that connects all of your SaaS services.Open an email, and Zenbox pulls in your customer information from
Founder(s): Brock Pierce, Cailen Sullivan, Scott Walker, Sean Grove, Tom Wenz
Location: San Francisco, California, United States
Industries: Bitcoin, Browser Extensions, Logistics, SaaS, Software
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Maxthon
Maxthon is a global software company developing web browsers that give users a seamless browsing experience across multiple platforms.
Founder(s): Jeff Chen
Location: San Francisco, California, United States
Industries: Android, Browser Extensions, iOS, Linux, Software
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Seesmic
Seesmic provides social media management and collaboration tools that enable businesses to build and manage their brands online.
Founder(s): Loic Le Meur
Location: San Francisco, California, United States
Industries: Android, Apps, Brand Marketing, Browser Extensions, CRM, Messaging, Social Media
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Rockmelt
Rockmelt is a social browser-turned social news application.
Founder(s): Eric Vishria, Tim Howes
Location: Mountain View, California, United States
Industries: Apps, Browser Extensions, Social Media
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InboxQ
InboxQ was a browser extension that delivered a persistent stream of questions from Twitter directly to the user.
Founder(s): Jason Konrad, Joe Fahrner
Location: San Francisco, California, United States
Industries: Browser Extensions, Content, Information Technology, Search Engine
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Magneto
Magneto is a cloud-based system that fixes your calendar. It syncs with Microsoft Exchange and Google Calendar and offers a web app,
Founder(s): David Schairer, Ellen Beldner, Gadi Shamia
Location: Redwood City, California, United States
Industries: Browser Extensions, Events, iOS, Software
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Xmarks
Xmarks offers a free bookmark synchronization add-on for the Firefox web browser.
Founder(s):
Location: San Francisco, California, United States
Industries: Android, Browser Extensions, Ediscovery, iOS, Mobile, Search Engine, Social Bookmarking, Web Browsers
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Searchlet.io
Instant knowledge without leaving the page
Founder(s): Mark Fazzini, Spencer Simonsen
Location: Mountain View, California, United States
Industries: Browser Extensions, Knowledge Management, Search Engine
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xFanatical
xFanatical is a Google Cloud technology partner offering productivity solutions over Google Workspace.
Founder(s):
Location: Rancho Cucamonga, California, United States
Industries: Browser Extensions, Consulting, Education, Information Technology, SaaS, Software
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Rank Dynamics
Rank Dynamics develops Dynamic Search, a real-time contextualization technology.
Founder(s): Mark Cramer, Mike Wertheim
Location: San Francisco, California, United States
Industries: Browser Extensions, Personalization, Search Engine
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Relay Chat
Relay Chat is a browser extension for free live chat for websites.
Founder(s):
Location: San Francisco, California, United States
Industries: Browser Extensions, Social Network, Software
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SaaSID
Cloud Application Security
Founder(s):
Location: Mountain View, California, United States
Industries: Accounting, Browser Extensions, Cloud Computing, CRM, Search Engine, Security
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Ant.com
Ant.com is a social oriented portal providing free services and freeware. Ant.
Founder(s): Louis Bellet
Location: San Francisco, California, United States
Industries: Browser Extensions, Search Engine, Social Bookmarking
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Twizgrid
Twizgrid is a free to use smartphone application for iOS devices.
Founder(s): Chauncey Regan, Scott Smith
Location: San Francisco, California, United States
Industries: Apps, Art, Browser Extensions, Data Visualization, iOS, Mobile, Photography, Search Engine, Software
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howsimple
HowSimple is a development-stage company offering an online search engine.
Founder(s): Craig Holland
Location: Idyllwild, California, United States
Industries: Browser Extensions, Online Portals, Search Engine, Software
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UXReality Platform
One of a kind, AI-powered solution for mobile behavior tracking. Eye movements, emotions, surveys, scroll, and clicks
Founder(s): Dmitry Gaiduk
Location: San Francisco, California, United States
Industries: Android, Apps, Artificial Intelligence, Browser Extensions, Information Technology, Mobile
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Degree3
Degree3 is a web development company that provides Q&A segments for websites, assisting visitors discover product details.
Founder(s): Joel Downs
Location: Los Angeles, California, United States
Industries: Browser Extensions, Developer Tools, Software
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Samfind
samfind Bookmarks Bar is a Firefox add-on that personalizes users’ browser with the websites they interact with regularly.
Founder(s): Samuel Deskin
Location: Los Angeles, California, United States
Industries: Browser Extensions, Search Engine, Social Media, Software, Web Browsers
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Optimal Access
A platform for curating access to information and sharing your research online and in context!
Founder(s): Karan Bavandi
Location: Los Angeles, California, United States
Industries: Browser Extensions, Search Engine
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Twimbow
Twimbow is a web-based app which helps social media users to engage in their network of friends by organizing and enriching conversations.
Founder(s):
Location: San Francisco, California, United States
Industries: Apps, Browser Extensions, Developer Tools, Messaging, Social Media, Web Development
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Qwisk
social browsing client
Founder(s): Dave Fowler, Zachary Garbow
Location: Walnut Creek, California, United States
Industries: Browser Extensions, Location Based Services, Messaging, Real Time, Social Media
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Vested Yeti
Social bookmarking app
Founder(s):
Location: Sacramento, California, United States
Industries: Browser Extensions, Consumer Applications, Social Bookmarking, Web Apps
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40A
Blackbird is operated by 40A, Inc., a company founded by three African American entrepreneurs, Arnold Brown II, Frank Washington, and H.
Founder(s):
Location: San Jose, California, United States
Industries: Browser Extensions
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GameLayers
GameLayers develops massively multiplayer online games (MMOG) integrated with web surfing.
Founder(s): Justin Hall, Merci Victoria Grace
Location: San Francisco, California, United States
Industries: Browser Extensions, Web Browsers
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Sortfoo
Sortfoo is a mobile application that helps to make a list of curated collections.
Founder(s):
Location: Murphys, California, United States
Industries: Browser Extensions, Mobile Apps, Product Search
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Trillium Insurance
Trillium Insurance is a leading licensed insurance brokerage firm.
Founder(s):
Location: Irvine, California, United States
Industries: Browser Extensions, Insurance
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Kango extensions
Kango extensions is a software technology firm that offers browser extensions, add-ons, javascript, coding, plugins & API services.
Founder(s):
Location: San Francisco, California, United States
Industries: Browser Extensions, Information Technology, QR Codes, Software, Web Browsers
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Arado Websearch
Arado Websearch is a Bookmark Database.
Founder(s):
Location: Mountain View, California, United States
Industries: Browser Extensions, Mobile, Search Engine, Social Bookmarking, Software
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LearnFind
Apture meets e-commerce
Founder(s):
Location: Sunnyvale, California, United States
Industries: Browser Extensions, Content, E-Commerce, Publishing
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gethoneybadger
Dig up relevant info for websites
Founder(s):
Location: Los Angeles, California, United States
Industries: Browser Extensions, SEO
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DeliciousSafari
DeliciousSafari is a plug-in for the Safari web browser to provide access to del.icio.us bookmarks directly from the browser.
Founder(s): Doug Richardson
Location: San Francisco, California, United States
Industries: Browser Extensions, Internet, Software
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Extendy
Extendy is a web application
Founder(s): Steve Poland
Location: Los Angeles, California, United States
Industries: Browser Extensions, Developer Tools
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Personal Web Systems
Personal Web Systems is a technology firm offering a web-to-TV browser.
Founder(s):
Location: Palo Alto, California, United States
Industries: Browser Extensions, Information Technology, Software
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