CDNJS
CDNJS is a free, open-source CDN service hosting 6,000+ open-source web libraries and serving over 13% of all websites globally via Cloudflare infrastructure, sustained by corporate sponsorships and community donations rather than direct revenue.
- Company typePrivate
- Founded2011
- HeadquartersBoston, United States
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What CDNJS does
CDNJS is a free, open-source Content Delivery Network service founded in 2011 that hosts and distributes over 6,000 open-source JavaScript libraries, CSS frameworks, fonts, and other web assets. The platform serves more than 13% of all websites globally and handles between 200 and 250 billion requests per month, with all content delivered through Cloudflare's global edge network supporting HTTP/3, HTTP/2, and QUIC protocols with Brotli 11 compression and HSTS preloading. The service is differentiated by SRI hash generation for every hosted file, an auto-update bot that continuously syncs libraries from GitHub and npm, and a public REST API powered by Algolia that enables both human search and programmatic access to the library catalog.
The business model is non-commercial in the traditional sense: CDNJS is a community-driven open-source project rather than a venture-backed company, with no pricing tiers and no direct revenue from CDN usage. Sustainability is provided through in-kind corporate sponsorships — Cloudflare supplies core CDN infrastructure, Algolia provides search technology, and DigitalOcean, StatusPage, Sentry, and UptimeRobot contribute supporting services — supplemented by community donations via Open Collective and Patreon. Key personnel include founder Ryan Kirkman, maintainer Sven Sauleau, and Cloudflare-employed maintainer Matt Cowley, alongside several active contributors. The team is sized at 1-10 people and is supported operationally by a public status page reporting 100% uptime over the prior 90 days.
The go-to-market is pure product-led growth with no sales motion: developers discover and adopt the service organically through GitHub, word-of-mouth, and the cdnjs.com website. Primary customer segments are individual web developers and frontend engineers building websites and web applications, plus open-source library authors seeking efficient distribution. A branded merchandise Swag Store operated via Spreadshirt serves as a minor ancillary channel. The company is privately held with no disclosed parent company, no funding rounds, and no institutional investment.
CDNJS firmographics
Firmographics- Name
- CDNJS
- Legal name
- cdnjs
- Website
- https://cdnjs.com
- Company type
- Private
- Founded year
- 2011
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- CDNJS is a free, open-source CDN service hosting 6,000+ open-source web libraries and serving over 13% of all websites globally via Cloudflare infrastructure, sustained by corporate sponsorships and community donations rather than direct revenue.
- Ownership category
- akta.pro rank
CDNJS industry classification
Industry- Product category
- Content Delivery Network (Open Source CDN)
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)
- SIC
- Services-Computer Processing & Data Preparation (7374)
- akta.pro primary industry
- Traditional CDN (Static & Dynamic Content Acceleration) (HDABAGAA)
- akta.pro secondary industry
- Update Delivery, Patch Management & CDN for Apps (BPAMADAL)
Keywords
Where CDNJS is headquartered
LocationHeadquarters
- HQ city
- Boston
- HQ country
- United States
- HQ region
- North America
Markets served
CDNJS business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Infrastructure, Technology or R&D, Personnel, Operations
Revenue model
- Community Donations: CDNJS is a free, public service that relies on community contributions and financial donations. Users can contribute via Open Collective or Patreon with suggested donation of $5. The service has no direct revenue from CDN usage.
- Corporate Sponsorships: Corporate sponsors like Cloudflare provide infrastructure and funding while Algolia provides search technology, DigitalOcean contributes resources, and StatusPage/Sentry/UptimeRobot provide operational tooling. These are primarily in-kind or sponsorship arrangements rather than revenue.
Go-to-market motion1 record
Distribution channels4 records
Marketing channels5 records
CDNJS product offering
Product offeringCore offering
CDNJS provides a free, open-source Content Delivery Network that hosts and serves JavaScript libraries, CSS frameworks, fonts, and other web assets to websites worldwide through Cloudflare's global infrastructure. The service is complemented by a REST API for programmatic library discovery and a web-based catalog browser with Algolia-powered search, SRI hash verification, and automated updates from GitHub and npm. There are no usage fees or rate limits for open-source consumers.
Product overview
CDNJS is a free and open-source CDN platform offering a unified service for delivering web library assets. The core product is the CDNJS CDN (hosted on Cloudflare infrastructure) which serves over 200 billion requests monthly. This is complemented by the CDNJS API for programmatic access, and the CDNJS Libraries web interface for discovering and searching the catalog of 3,600+ open-source libraries. An optional Swag Store powered by Spreadshirt offers branded merchandise.
Differentiator
Problem solved
Functional benefit
Products and services
- CDNJS CDN Free and open-source Content Delivery Network for hosting and delivering JavaScript libraries, CSS frameworks, fonts, and other web assets, powered by Cloudflare infrastructure and serving over 200 billion requests per month.
- CDNJS API Public REST API providing programmatic access to browse libraries, retrieve library metadata, fetch version-specific files with SRI hashes, retrieve the file extension whitelist, and access basic statistics. Backed by the Algolia index and returning JSON.
- CDNJS Libraries (Web Catalog) Web interface for searching and browsing the complete catalog of open-source libraries available on the CDN, with Algolia-powered find-as-you-type search.
- CDNJS Swag Store Third-party merchandise storefront powered by Spreadshirt, offering branded cdnjs apparel and items.
Companies that use CDNJS
Customer profileNamed customers1 record
Segments2 records
Ideal customer profiles1 record
CDNJS technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
CDNJS partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and minor.
- CloudflarecoreCloudflare is the primary infrastructure provider for CDNJS, supplying the global CDN network that powers all content delivery. Cloudflare also provides project maintenance support with their engineer Matt Cowley serving as maintainer. This is the most critical partnership for CDNJS operations.
- AlgoliacoreAlgolia provides the developer-friendly SaaS search API that powers the cdnjs library search functionality. The Algolia index enables fast find-as-you-type search experience across all available libraries, ranked primarily by GitHub stars.
- SpreadshirtminorSpreadshirt powers the cdnjs Swag Store as a third-party merchandise provider, handling the backend for cdnjs-branded merchandise sales.
Scale indicators4 records
Recent moves6 records
Expansion highlights4 records
CDNJS competitors and assessment
Company assessmentMarket position
Weaknesses4 records
Competitive moat4 records
Key risks2 records
Key highlights5 records
Customer concentration
CDNJS social profiles
Digital presenceCDNJS financial estimates
Financial estimateRevenue estimate
Valuation estimate
CDNJS leadership team
Management profileNumber of profiles
Profiles7 records
CDNJS funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CDNJS M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CDNJS
What does CDNJS do?
CDNJS provides a free, open-source Content Delivery Network that hosts and serves JavaScript libraries, CSS frameworks, fonts, and other web assets to websites worldwide through Cloudflare's global infrastructure. The service is complemented by a REST API for programmatic library discovery and a web-based catalog browser with Algolia-powered search, SRI hash verification, and automated updates from GitHub and npm. There are no usage fees or rate limits for open-source consumers.
Is CDNJS a public or private company?
CDNJS is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was CDNJS founded?
CDNJS was founded in 2011. It employs 1 to 10 people.
Where is CDNJS based?
CDNJS is headquartered in Boston, United States, in the North America region.
How does CDNJS make money?
Two revenue lines are on record. Community Donations are the primary driver. The others are corporate Sponsorships.
Does CDNJS have an API?
Yes. Public REST API providing access to cdnjs library data including browsing all libraries, getting specific library details, retrieving version-specific files with SRI hashes, fetching file extension whitelist, and basic statistics. API is directly powered by Algolia index. Cache lifetime is 6 hours for libraries endpoint and 355 days for version endpoints. Response format is JSON. Developer documentation is at cdnjs.com/api.
What industry is CDNJS in?
CDNJS's product category is Content Delivery Network (Open Source CDN). Its primary akta.pro industry code is HDABAGAA, Traditional CDN (Static & Dynamic Content Acceleration), with a secondary code of BPAMADAL, Update Delivery, Patch Management & CDN for Apps. Its NAICS code is 518 and its SIC code is 7374.