Company lists · Data refreshed September 2026
Top 25 Online charter schools based in the United States
RevenueBase identified 789 online charter schools headquartered in the United States as of September 2026 and tracks 48,610 professional contacts across them, including 19,110 with verified work emails. New York is the largest hub.
This list covers online charter schools headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest online charter schools based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,988 contacts → | ||||
Partial evidence “IDEA Public Schools believes that each child can go to college.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,677 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,450 contacts → | ||||
Strong evidence “Charter Schools USA is one of the fastest growing education management companies in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,314 contacts → | ||||
Partial evidence “K12 is an online K–12 education provider operating under Stride, Inc, a publicly traded company headquartered in Reston, Virginia, serving students across all 50 states and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,162 contacts → | ||||
Indirect evidence “We believe people thrive when they’re given freedom, trust, and the opportunity to make a difference.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,630 contacts → | ||||
Indirect evidence “Academy District 20 (ASD20) was founded in 1957 and serves more than students in northern Colorado Springs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,293 contacts → | ||||
Indirect evidence “At IXL Learning, we are passionate about improving learning for all.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 948 contacts → | ||||
Indirect evidence “CCA is a family service organization with deep experience in education.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 922 contacts → | ||||
Indirect evidence “Connections Academy is a tuition-free, fully accredited public education program for students in grades K–12.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 878 contacts → | ||||
Indirect evidence “Work Hard.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 857 contacts → | ||||
Partial evidence “Battle Ground Public Schools educates students in an engaging environment that meets the needs of every learner.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 795 contacts → | ||||
Indirect evidence “Somerset Academy, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 767 contacts → | ||||
Strong evidence “Founded in 2011, Epic Charter Schools (Epic) is Oklahoma’s largest public virtual charter school – and among the largest of its kind in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 702 contacts → | ||||
Strong evidence “We're a network of over 90 high-performing, public charter schools serving PK-12 students.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 466 contacts → | ||||
Indirect evidence “You know that your kids have something special inside them.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 457 contacts → | ||||
Indirect evidence “At Agora, we provide students the opportunity to engage in a personalized, innovative education that inspires and prepares them to reach their highest potential, both academically…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 412 contacts → | ||||
Indirect evidence “Our mission is to empower students by fostering their innate curiosity, engaging their parents, and promoting optimum learning by collaboratively developing a personalized…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 382 contacts → | ||||
Indirect evidence “Georgia Cyber Academy is a company based out of 1745 Phoenix Blvd Suite 100, Atlanta, Georgia, United States.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 370 contacts → | ||||
Indirect evidence “MISSION: Developing productive members of society.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 351 contacts → | ||||
Strong evidence “Edgenuity (now Imagine Learning) partners with schools and districts to provide online and blended learning solutions that propel student success and empower every teacher to…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 349 contacts → | ||||
Strong evidence “Reach Cyber Charter School is a Pennsylvania online public school serving students grades K-12.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 346 contacts → | ||||
Strong evidence “Propel Schools, a network of 13 public charter schools in Allegheny County, PA, was founded in 2003.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 305 contacts → | ||||
Strong evidence “DISCOVER OUR COMMUNITY OF PARTNERSHIP, LEARNING AND ACHIEVEMENT PA Virtual Charter School is a free public PA cyber school of choice chartered and approved by the Pennsylvania…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 293 contacts → | ||||
Partial evidence “KIPP Nashville Public Schools is a network of high-performing, free, open enrollment K-12 schools that has been committed to positively affecting student outcomes in Nashville…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 274 contacts → | ||||
Partial evidence “Lawrence public schools, usd #497” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: online charter schools. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names online charter schools.
- Partial evidence
- Its own public description names part of online charter schools, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name online charter schools. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 789 online charter schools based in the United States
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Online charter schools based in the United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 789 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among online charter schools, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “online charter schools”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names online charter schools), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among online charter schools, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 19,110 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names online charter schools, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many online charter schools are there based in the United States?
RevenueBase identified 789 online charter schools headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Idea Public Schools, headquartered in Weslaco, tops this list with the largest team on record.
Which city has the most online charter schools?
New York leads with 14 headquartered companies, followed by Phoenix (13) and Houston (9).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 19,110 verified decision-maker contacts tracked across these 789 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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