ck12.org
CK-12 Foundation
Who runs CK-12 Foundation, what it tracks and what it costs, and the 20 closest K-12 online education alternatives.
- Who’s behind it
- Not stated
- Online since
- Unknown
- Trackers
- Couldn’t check
- Prices
- No pricing page
- Last price change
- –
- Closest alternative
- IXL
Measured from CK-12 Foundation’s own pages, the Internet Archive and public records. Hover a dotted value for its source and date.
Visit CK-12 Foundation01 · Who’s behind it
Who runs CK-12 Foundation
CK-12 Foundation ck12.org
Wikidata: california-based non-profitable organization
- Company
- No imprint we could read
- Online since
- Not in the Internet Archive
02 · Privacy
What CK-12 Foundation tracks
We couldn’t read ck12.org’s homepage (HTTP 403), so we can’t say what it loads.
03 · Alternatives
Alternatives to CK-12 Foundation
Thumbs up if it’s a real alternative to CK-12 Foundation, thumbs down if it isn’t.
We can’t read ck12.org’s homepage (HTTP 403), so it’s compared on what Wikidata and Wikipedia say about it.
- 01
IXL | Math, Language Arts, Science, Social Studies, and Spanish
IXL is the world's most popular subscription-based learning site for K–12. Used by over 18 million students, IXL provides personalized learning in more than 20,000 topics, covering math, language arts, science, social studies, and Spanish. Interactive questions, awards, and certificates keep kids motivated as they master skills.
Very close - 02
OpenStax
OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!
Very close - 03
Client Challenge
non-profit educational organization
Very close - 04
EBA
Türkiye'nin en büyük dijital eğitim platformu
Very close - 05
Free K–12 Curriculum for Digital Fluency | CodeAI
Bring computer science and AI education to your classroom with CodeAI’s free K–12 curriculum, hands-on projects, and teacher professional development—no prior experience needed.
Very close - 06
Wikibooks
free multilingual online collection of textbooks
Very close - 07
Home | LibreTexts
open access educational resource collection
Very close - 08
Zearn is a nonprofit organization that develops and provides a digital math learning platform for K–8 students. The platform is used in classrooms across the U.S. to support math instruction and practice.
Very close - 09
Online Math & Reading Programs for Students | DreamBox by Discovery Education
Discover Engaging Online Math & Reading Programs For Students With DreamBox Learning. Foster Academic Growth & Success With Our Interactive Platform Today!
Very close - 10
The Top Coding and Computer Science Platform for K-12 Schools | CodeHS
CodeHS is the comprehensive K-12 platform for computer science, AI, and digital literacy — free curriculum, IDE, grading tools, and professional development for schools and districts nationwide.
Very close - 11 PowerSchool powerschool.com
US-based student information system
Very close - 12
Learn to Type | Type Better | Type Faster - Typing.com - Typing.com
World's most popular free typing program! Typing.com’s K–12 typing curriculum features touch typing, digital citizenship, coding lessons, and games.
Very close - 13
Edmentum
Flexible Learning Paths.Proven Outcomes.Future-Ready Students. Edmentum’s K–12 solutions accelerate growth and achievement, from foundational learning…
Very close - 14
Amplify I High-quality K–12 curriculum & assessments I Homepage
Amplify partners with K–12 teachers to make learning rigorous and riveting for every student. Learn more about our curriculums & assessments.
Very close - 15
American aggregation platform providing open access to digital collections from libraries, archives, and museums.
Close - 16
Building tools for shared knowledge - Creative Commons
family of public copyright licenses for allowing free use of a work
Close - 17
DeltaMath
Math done right
Close - 18
Internet Archive: Digital Library of Free & Borrowable Texts, Movies, Music & Wayback Machine
U.S. non-profit organization and digital archive
Close - 19
Joomla Content Management System (CMS) - try it! It's free!
Joomla! is the mobile-ready and user-friendly way to build your website. Choose from thousands of features and designs. Joomla! is free and open source.
Close - 20
Renaissance | Personalized teaching to help you See Every Student
Educators trust Renaissance software solutions for K‒12 assessment and reading and math practice to increase student growth and mastery.
Close
Closest first, by how much each site’s offer resembles CK-12 Foundation’s. Trackers are counted the same way as above. Highlighted technologies are ones CK-12 Foundation uses too. Votes and comments come from visitors and don’t change the order.
04 · History
What changed
Price and policy history →No changes yet. Each new crawl is compared with the last one, and what CK-12 Foundation adds, drops or rewrites shows up here.
05 · Details
How we measure
Alternatives are matched by what sites actually offer, from their homepages, Wikidata and a summary by Claude, in any language. Trackers and the rest of the stack come from the homepage’s code and DNS records.
The full technology stack, the competitor map and search numbers · 10 technologies
- Neighbours
- k = 20
- Sites searched
- 9,192
- Vector
- 384-d
- Query
- 49 ms
Competitor map
Each alternative by how close its vector is to CK-12 Foundation’s (x) and how much traffic it gets, how much of the stack it shares, or where it sits in the embedding space itself (y). Hover for the numbers, click to jump to it in the list.
similarity × popularity
Built with
- Live chat & support
- Zendesk TXT v=spf1 ip4:174.129.252.43 ip4:63.236.100.0/24 ip4:66.77.16.0/24 inclu…
- CDN
- Amazon CloudFront header x-amz-cf-id: Qx9fc4uNGW4qBsWVio66iyLk5KMOuDKUZAETanR51nN9fHOJ81G_kA==
- Email hosting
- Google Workspace MX aspmx.l.google.com
- Microsoft 365 TXT MS=ms18161979
- Email delivery
- Amazon SES TXT v=spf1 ip4:174.129.252.43 ip4:63.236.100.0/24 ip4:66.77.16.0/24 inclu…
- DNS hosting
- Amazon Route 53 NS ns-1136.awsdns-14.org
- SaaS tools (verified in DNS)
- Apple Business TXT apple-domain-verification=QF7bv1DM6D2BfMs3
- Google Search Console TXT google-site-verification=E3NQxLaOaxNDjKuRkg4JntlxjO0OkaV7R1i0iMIVMMI
- Meta Business Suite TXT facebook-domain-verification=2f23smij2mb05apqoaktiu7od6tn98
- OpenAI TXT openai-domain-verification=dv-9DfgnOGcp8UMZOccoCfU0yya
What competitors use
Across the 20 closest sites.
- Google Search Console 19/20
- Microsoft 365 13/20
- Google Workspace 12/20
- Atlassian · not on ck12.org 11/20
- Cloudflare DNS · not on ck12.org 8/20
- Apple Business 7/20
- Cloudflare · not on ck12.org 7/20
- OpenAI 7/20
- Meta Business Suite 7/20
- Amazon Route 53 7/20
- Salesforce · not on ck12.org 7/20
- Amazon CloudFront 6/20
- Font Awesome · not on ck12.org 6/20
- PHP · not on ck12.org 6/20
- Google Analytics · not on ck12.org 5/20
- Amazon SES 5/20