Company lists · Data refreshed September 2026
Top 25 Reading intervention services worldwide
RevenueBase identified 1,291 reading intervention services worldwide as of September 2026 and tracks 23,741 professional contacts across them, including 2,868 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers reading intervention services worldwide, 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 21, 2026. Country and city lists for reading intervention services follow the table.
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 reading intervention services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 7,431 contacts → | ||||
Partial evidence “Kumon is the world’s largest after-school math and reading enrichment program that has enrolled over 16 million children since its inception over 60 years ago.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 964 contacts → | ||||
Indirect evidence “Eye Level is a premiere supplementary education and enrichment program offering innovative and effective Math and English programs that are heavily focused on developing a child’s…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 845 contacts → | ||||
Indirect evidence “We believe that all children and adults can be taught to read and comprehend to their potential.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 760 contacts → | ||||
Indirect evidence “Sylvan Learning is the leading provider of tutoring and supplemental education services to students of all ages and skill levels.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 596 contacts → | ||||
Partial evidence “Instructing 1st and 4rth grade students in the subjects of reading and math.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 416 contacts → | ||||
Strong evidence “BookNook is a research-based tutoring solution delivering high-impact reading and math intervention for K–8 students.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 388 contacts → | ||||
Indirect evidence “Our mission is to provide quality professional learning and ongoing support so that educators have the skills and tools they need to help their students become fluent, independent…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 223 contacts → | ||||
Indirect evidence “StudyPoint's founders had a simple idea: to create a better alternative to impersonal learning centers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 210 contacts → | ||||
Partial evidence “Fully focused on intervention, we have established four decades of results that demonstrate the efficacy of our solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 167 contacts → | ||||
Indirect evidence “Best In Class Education is not just our name, but our motto as well.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 165 contacts → | ||||
Indirect evidence “We are helping kids learn how to read.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 140 contacts → | ||||
Indirect evidence “Kumon study helps children of any age and any ability to shine.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 134 contacts → | ||||
Indirect evidence “The right support, at the right time and place, for students with dyslexia, ADHD, and related learning differences.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 115 contacts → | ||||
Indirect evidence “MultiLit (“Making Up Lost Time in Literacy”) is a leading provider of effective literacy instruction in Australasia.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 109 contacts → | ||||
Indirect evidence “First Education offers One on One K to 12 Tuition in Maths, English, and all major subjects… with a difference!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 106 contacts → | ||||
Indirect evidence “OnYourMark is a virtual tutoring service providing individualized, one-on-one instruction in the foundations of literacy to early readers in grades K-6.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 80 contacts → | ||||
Partial evidence “Beyond Basics is a national literacy nonprofit dedicated to helping students unlock the power of reading through one-on-one tutoring and structured literacy programs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 79 contacts → | ||||
Indirect evidence “Hill Learning Center is an educational non-profit that serves K-12 students who are struggling academically – especially those with learning differences - through our School Year…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 74 contacts → | ||||
Partial evidence “Hoot Reading is the leading online tutoring service providing 1:1, evidence-based literacy instruction with qualified teachers, at scale.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 56 contacts → | ||||
Strong evidence “Read Naturally's innovative, research-proven reading programs provide high-quality interventions and differentiated instruction for struggling readers of all ages and abilities…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 53 contacts → | ||||
Indirect evidence “Lexima is dé expert in onderwijsbegeleiding bij leesproblemen, laaggeletterdheid en dyslexie.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 48 contacts → | ||||
Indirect evidence “The Stern Center for Language and Learning is a nationally recognized nonprofit dedicated to life-changing learning for all.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 46 contacts → | ||||
Indirect evidence “LDS provides comprehensive, expert learning supports to children, youth and adults with learning challenges.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 45 contacts → | ||||
Indirect evidence “ABOUT CHURCHILL: Churchill Center & School, a nationally recognized independent school for dyslexia and other language-based learning disabilities, embodies their mission to give…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 42 contacts → | ||||
Indirect evidence “We create opportunities to grow!” Source: RevenueBase Database · checked Sep 21, 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: reading intervention services. 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 reading intervention services.
- Partial evidence
- Its own public description names part of reading intervention services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name reading intervention services. 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 1,291 reading intervention services worldwide
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Reading intervention services worldwide at a glance
As of Sep 21, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 reading intervention services, 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.
- Coverage
- Every country. Country and city lists for reading intervention services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “reading intervention services”. 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 reading intervention services), 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 reading intervention services, and records with no verified work email.
- 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, 2,868 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 21, 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.
Reading intervention services by location
5 lists · largest firstEvery Reading intervention services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 reading intervention services, 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 reading intervention services are there worldwide?
RevenueBase identified 1,291 reading intervention services worldwide 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?
Kumon North America, INC, headquartered in Rutherford, tops this list with the largest team on record.
Which country has the most reading intervention services?
The United States leads with 598 companies, followed by Canada (72) and the Netherlands (58). Every reading intervention services list by country and city is linked on this page.
Which city has the most reading intervention services?
New York leads with 17 headquartered companies, followed by London (13) and Houston (11).
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 2,868 verified decision-maker contacts tracked across these 1,291 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 21, 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.