Insights

Mission fit Building 21 is a nonprofit focused on reimagining secondary schooling and opening new high schools, presenting a strong alignment for partnerships with school districts, communities, and families seeking innovative models.

Scale potential Current staff size indicates a grassroots and scalable model with capacity to collaborate on multiple openings, curricula customization, and district-level program expansions.

Tech-enabled learning The organization emphasizes self-paced, relevant curricula and real-world skill application, suggesting opportunities to offer edtech platforms, digital learning tools, and data analytics to support personalized learning paths.

Funding footprint With reported revenue in the 10-25 million range, Building 21 may be open to partnerships, grants, and sponsorships with corporations or foundations seeking impact in secondary education reform.

Competitive landscape Peers include High Tech High and New Tech Network, indicating a market where collaborators can explore joint proposals, shared services, or scalable implementation models to win district-wide contracts.

Building 21 Tech Stack

Building 21 uses 8 technology products and services including Facebook Pixel, cdnjs, Google Cloud DNS, and more. Explore Building 21's tech stack below.

  • Facebook Pixel
    Analytics
  • cdnjs
    Content Delivery Network
  • Google Cloud DNS
    Domain Name Services
  • jQuery UI
    Javascript Libraries
  • imagesLoaded
    Javascript Libraries
  • PHP
    Programming Languages
  • Yoast SEO
    Search Engines
  • GTranslate
    Web Platform Extensions

Media & News

Building 21's Email Address Formats

Building 21 uses at least 2 format(s):
Building 21 Email FormatsExamplePercentage
Last@b-21.orgDoe@b-21.org
50%
First@b-21.orgJohn@b-21.org
40%
FLast@b-21.orgJDoe@b-21.org
10%
FLast@building21.orgJDoe@building21.org
100%

Frequently Asked Questions

Where is Building 21's headquarters located?

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Building 21's main headquarters is located at Philadelphia, Pennsylvania United States. The company has employees across 2 continents, including North AmericaAfrica.

What is Building 21's official website and social media links?

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Building 21's official website is building21.org and has social profiles on LinkedIn.

What is Building 21's NAICS code?

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Building 21's NAICS code is 813 - Religious, Grantmaking, Civic, Professional, and Similar Organizations.

How many employees does Building 21 have currently?

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As of May 2026, Building 21 has approximately 27 employees across 2 continents, including North AmericaAfrica. Key team members include Vice President Of Development: M. H.Vice President Human Resources: R. A.Head Of Instruction: B. M.. Explore Building 21's employee directory with LeadIQ.

What industry does Building 21 belong to?

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Building 21 operates in the Non-profit Organizations industry.

What technology does Building 21 use?

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Building 21's tech stack includes Facebook PixelcdnjsGoogle Cloud DNSjQuery UIimagesLoadedPHPYoast SEOGTranslate.

What is Building 21's email format?

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Building 21's email format typically follows the pattern of Last@b-21.org. Find more Building 21 email formats with LeadIQ.

When was Building 21 founded?

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Building 21 was founded in 2013.
Building 21 logo

Building 21

Non-profit OrganizationsPennsylvania, United States11-50 Employees

Building 21 is a nonprofit organization based in Philadelphia, Pennsylvania, that reimagines secondary schooling to meet the needs of all learners. It partners with communities, families, students, teachers, educational leaders, and school districts to design, open, and operate new high schools, aiming to create learning environments where students progress at their own pace and engage with relevant content while developing real-world skills. The organization operates within the education sector, focusing on high school reform by integrating adaptable curricula and practical application, with the goal of making secondary education more inclusive and meaningful for diverse learners. While its exact founding date is not provided, Building 21 positions itself as a collaborator across communities to develop and run new high schools in the region, reflecting a model that links classroom experience with real-world contexts.

Section iconCompany Overview

Headquarters
Philadelphia, Pennsylvania United States
NAICS Code
813 - Religious, Grantmaking, Civic, Professional, and Similar Organizations
Founded
2013
Employees
11-50

Section iconMedia & News

Section iconFunding & Financials

  • $10M$25M

    Building 21's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    Building 21's revenue is estimated to be in the range of $10M$25M

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