Rennert International

What Rennert International does

Rennert International is a privately held, founder-family-controlled English language school founded in 1973 in New York City by former NYU faculty member Cesar Rennert. The company delivers adult intensive English programs (Semi-Intensive 16, Intensive 20/22/30), academic English, TOEFL prep, business and executive English, OET prep and testing for healthcare professionals, and a portfolio of 'Plus English' specialty tracks in fashion, acting, dance, filmmaking, music, and photography via partnerships with institutions such as the New York Film Academy, Steps on Broadway, and Kaufman Music Center. Its signature asset is the proprietary R.E.A.L. (Rennert Experiential Approach to Languages) teaching methodology, which emphasizes immersive, real-world communication from day one.

The business operates three core engines: a consumer-facing language school co-located within Berkeley College's NYC Midtown campus (since 2018) with rolling weekly admissions and accommodation coordination; a Corporate Language Solutions division providing customized ESL and translation/interpretation services to Fortune 500 companies; and the Rennert TESOL Center, which delivers World Learning SIT-branded teacher certification both on-site and online. Revenue mechanics are tuition-based with quote-based weekly pricing across intensive programs, plus enterprise professional-services fees, TESOL course fees, OET test center fees, and translation/interpretation project billing. Distribution relies on direct enrollment via website/phone/email, a global education agent network, the Berkeley College academic pathway, and the high-visibility NYCFC Official Language Partnership.

The company serves 135+ nationalities, has instructed 75,000+ students since founding, and operates with 101–250 employees across 4 campuses and 60 classrooms. It holds Top 5 English School in North America status from StudyTravel Magazine for 11 consecutive years and is a founding member of the International Association of Language Centres (IALC). Revenue is not publicly disclosed.

Name

Rennert International

Legal name

Rennert International

Website

https://rennert.com

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

101–250 employees

Short description

Rennert International is a privately held New York City language school founded in 1973 that delivers English instruction, TESOL certification, corporate training, and translation services to international students, Fortune 500 clients, and aspiring ESL teachers via its Berkeley College campus and proprietary R.E.A.L. method.

Ownership category

akta.pro rank

Product category

Language Instruction Services

NAICS

Language Schools (611630), Professional and Management Development Training (611430), Exam Preparation and Tutoring (611691), Translation and Interpretation Services (541930)

SIC

Services-Educational Services (8200)

akta.pro primary industry

Business & Professional Language Training Abroad (EDAIAEAC)

akta.pro secondary industries

Teacher Training & Professional Development for Adult ESL (TESOL/TEFL/CELTA for Adult Ed) (EDAAACAM), Content Localization, Translation & Transcreation (BPAFAIAH), Pronunciation, Accent Reduction & Speaking Fluency (EDAAACAH), English Proficiency & International Admissions Exams (TOEFL/IELTS/PTE/Duolingo) Prep (EDANABAC), Online-to-Offline Hybrid Language Immersion Programs (EDAIAEAK)

Keywords

• English language instruction
• TESOL certification courses
• Corporate language training
• Language translation services
• Foreign language education

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. English Language Instruction: Core revenue from intensive English programs including American English (Semi-Intensive 16, Intensive 20, 22, 30), Academic English, Business English, Executive Programs, and Plus English (Acting, Dance, Fashion, Filmmaking, Music, Photography). Programs priced per week with duration options from 1 week to full semester/year. Add-on private lessons and specialized courses available at additional cost.
2. Teen Programs: Seasonal Rennert Teens summer and winter programs for ages 13-17. Programs include Summer Plus! (20 lessons/week) and Winter Adventures with options for English-only, English + 2 activities/week, or English + 5 activities/week. Weekly pricing from 1 to 6 weeks.
3. Teacher Training / TESOL Certification: SIT TESOL Certificate Courses through World Learning partnership. 160 hours of face-to-face instruction offered as intensive 4-week full-time or extensive 14-week part-time courses. Additional courses: Refresher Course (2-4 weeks), Practicum Course, Teaching English to Young Learners, Teaching Business English, and TESOL Certificate Online.
4. Corporate Language Training: Customized ESL programs for Fortune 500 companies and global businesses. Services include one-to-one lessons, small groups, and company-wide training. Partnership with Berkeley College provides pathways to professional development and degree programs. Free employee English language assessments drive sales.
5. Translation and Interpretation Services: Rennert Translation Group provides translation, transcreation, localization, and international interpretation services for Fortune 500 companies. Rennert provided simultaneous interpreters for FIFA World Cup 2018 and 2022 for a major television network.
6. OET Testing and Preparation: Official OET Test Center in NYC. Part-time OET Exam Preparation Course for healthcare professionals. Test fees and preparation course fees generate revenue from medical professionals seeking licensing in English-speaking countries.
7. Accommodation Services: Housing coordination services including Homestay families, Residences, and Executive Apartments. Partnership with accommodation providers across NYC's five boroughs. Revenue from placement coordination for international students.

Pricing tiers

Go-to-market motion4 records

Distribution channels7 records

Marketing channels8 records

Core offering

Rennert International delivers immersive English language instruction, executive and business English programs, TESOL teacher certification courses, and specialized language-plus-discipline programs (fashion, dance, filmmaking, music, photography, acting) to international students and corporate clients. Through Rennert Translation Group, it also provides translation, transcreation, localization, and simultaneous interpretation services for Fortune 500 companies and global events.

Product overview

Rennert International is a premier language school founded in 1973, offering a comprehensive portfolio of English language programs and teacher training services. The core offering consists of American English programs (Semi-Intensive 16, Intensive 20, Intensive 22, Intensive 30) ranging from foundational to maximum immersion, alongside specialized tracks including Academic English, Exam Preparation (TOEFL, OET), Business English, and Executive Programs. The product suite includes Plus English specialty programs combining language learning with fashion, acting, dance, filmmaking, music, and photography; Teen Programs (Summer Plus! and Winter Adventures); and comprehensive Teacher Training (SIT TESOL Certificate, Refresher, Practicum, and specialty courses). Additional offerings include add-on modules (Private Lessons, Business Writing, Pronunciation/Accent Reduction) and Corporate Language Solutions. The school operates in partnership with Berkeley College, offering academic pathway programs, and maintains relationships with NYCFC for language services.

Differentiator

Problem solved

Functional benefit

Brands

• R.E.A.L. Method (Rennert Experiential Approach to Languages): The signature teaching methodology developed by Cesar Rennert that prioritizes communication through experiential learning, immersing students in a new language from their first day of study.
• Rennert Translation Group
• Rennert TESOL Center
• Rennert Real Life English

Products and services

• American English Programs (Semi-Intensive 16, Intensive 20, Intensive 22, Intensive 30) American English language programs offered at four intensity levels (16, 20, 22, and 30 lessons per week) for international adult students seeking foundational to maximum-intensity immersion in New York City.
• English for Academic Purposes Academic English program preparing international students for university-level study in English-speaking institutions, focusing on academic writing, research skills, and scholarly communication.
• TOEFL Success Exam Preparation Exam preparation course focused on test-taking strategies and skills for success on the TOEFL (Test of English as a Foreign Language) exam.
• Business English Programs Business English offerings for ages 17-27 covering workplace vocabulary, presentation skills, meeting participation, and negotiation techniques, including Business English for Future Professionals (online), Business English in Action (internship), and Language Immersion Placement Service.
• Executive Programs (Professional Group, Professional Private, Professional Combination) Executive English programs in small groups of up to 6 students, combining Professional Group lessons with private lessons, networking events, and cross-cultural workshops.
• SIT TESOL Certificate Courses Intensive 4-week or extensive 14-week TESOL certification developed by World Learning's SIT Graduate Institute, including 160 hours of instruction, teaching practice with real ESL students, and workshop sessions on methodology.
• TESOL Specialty Courses (Refresher, Practicum, TEYL, TBE, Online) Specialty TESOL courses including TESOL Refresher, TESOL Practicum, Teaching English to Young Learners, Teaching Business English, and the Online TESOL Certificate (140 hours with live instruction).
• Corporate Language Solutions Customized corporate English language training for businesses, including one-to-one lessons, small groups, and company-wide training, with partnership pathways to Berkeley College degree programs.
• Rennert Translation Group Services Translation, transcreation, localization, and international interpretation services for Fortune 500 companies and individuals, including simultaneous interpreters provided for FIFA World Cup 2018 and 2022 for a major television network.
• Occupational English Test (OET) Preparation and Test Center Official OET Test Center in Manhattan hosting paper-based exams for healthcare professionals, plus an OET Exam Preparation Course covering reading, writing, listening, and speaking for 12 healthcare professions including nursing, medicine, dentistry, and pharmacy.
• Rennert Summer Plus! (Teen Program) Summer teen program for ages 13-17 at Berkeley College featuring 20 English lessons per week combined with Dance or Business/Leadership tracks, plus fully supervised activities.
• Rennert Winter Adventures (Teen Program) Winter teen program for ages 13-17 combining immersive English with winter-themed activities in NYC; rolling admissions starting any Monday during the winter season.
• Summer Fashion Immersion Certificate 4-week intensive fashion certificate program at Berkeley College covering styling, sustainability, textiles, merchandising, and branding with 15 hours/week of hands-on classes, completed with a fashion merchandising portfolio.
• English Plus Filmmaking 8-week program combining 4 weeks of Intensive 30 English with 4 weeks at the New York Film Academy for hands-on filmmaking workshops; students earn 4 credits.
• English Plus Acting Combined English and acting program with 4 weeks of English plus 4 weeks of Acting for Film (30 hours/week), in partnership with NYC acting studios near Broadway.
• English Plus Dance English language program combined with dance instruction at Steps on Broadway (2 weeks minimum, 5+ dance lessons per week) covering hip-hop, jazz, ballet, and musical theater.
• English Plus Music English combined with private music instruction at Kaufman Music Center (2 weeks minimum, 2+ music hours per week) covering voice training and instruments.
• English Plus Photography English combined with photography courses at PhotoUno Studio (1 day to 6 weeks, 15+ photography lessons per week) covering digital photography and photographing NYC.
• Online TESOL Certificate Program Online TESOL certification program with 140 hours of learning, practicum, and reflection seminars delivered via Rennert TESOL Online Portal with interactive live instruction from world-class trainers.
• Rennert and Berkeley College Pathway Program Academic pathway program allowing Rennert students conditional acceptance and progression into Berkeley College degree programs, with dedicated pathway courses and combined facilities at the NYC Midtown campus.

Quantifiable outcome

• 75,000+ students instructed since 1973
• +2 more outcomes

Named customers5 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature3 records

Partnerships

Eleven partnerships are on record, tiered minor, core and flagship.

• Berkeley College Career ServicesminorStrategic or Co-development Partner · 1 August 2025Collaborative partnership delivering three-part Career Development Workshop series. Workshops cover US-style resume building, LinkedIn strategies, and dynamic public speaking. Led by Senior Leaders and Career experts including Jasmine Briggs Rogers (Senior Director of Career Services) and Amy Soricelli (VP of Career Services). Supports Rennert Experiential Approach to Language Learning.
• New York City Football Club (NYCFC)coreGTM or Marketing Partner · 1 May 2024Official Language Partner for six consecutive years (since 2019). Rennert provides ESL instruction to NYCFC first team players, coaches, and staff. Language training delivered at NYCFC training facility in Orangeburg and online throughout season. Relationship extended through 2024 season with continued collaboration on education and career development. Students attend matches and special events. NYCFC provides congratulatory video and cross-promotional opportunities.
• Berkeley CollegeflagshipStrategic or Co-development Partner · 1 January 2018Strategic partnership since 2018 operating within Berkeley College's NYC Midtown campus. Rennert provides ESL instruction and language programs while Berkeley College offers pathway programs and higher education opportunities. Joint venture includes shared facilities, career workshops, and collaborative marketing. As of 2023, Berkeley College enrolls 290 international students representing 57 countries. The partnership provides Rennert with academic credibility and campus facilities while Berkeley College gains ESL resources and international student recruitment capabilities.
• World Learning SIT Graduate InstitutecoreTechnology or IntegrationWorld Learning SIT Teacher Training partner for over 20 years. Rennert TESOL Center delivers SIT-developed TESOL certification courses. Course developed by one of the world's leaders in quality international education programs. Provides internationally recognized TESOL certification combining theory with practical skills. Graduates receive SIT TESOL Certificate enabling global teaching careers.
• International Association of Language Centres (IALC)coreStrategic or Co-development PartnerFounding member of IALC, an award-winning global community of language schools. IALC administers strict quality and ethical controls for member schools. Membership provides credibility, best practice sharing, and industry advocacy. Rennert participates in IALC's quality standards and ethical guidelines.
• OET (Occupational English Test)coreTechnology or IntegrationOfficial OET Test Center in Manhattan, NYC. OET results accepted by healthcare regulators in UK, Ireland, Australia, New Zealand, Dubai, Namibia, Singapore, and Ukraine for professional licensing. Rennert provides paper-based OET testing and OET Exam Preparation courses for healthcare professionals seeking certification.
• WindowsWearminorStrategic or Co-development PartnerCo-founder Jon Harari of WindowsWear (world's largest creative platform for fashion brands and retailers) provides guest lectures for Fashion Plus program. WindowsWear offers retail creativity and visual storytelling insights. Contributes to fashion industry immersion experience for students.
• Steps on BroadwayminorChannel Partner/ Reseller/ DistributorDance partner for English Plus Dance program. Located steps from Broadway. World-leading dance school offering classes in Hip-Hop, Jazz, Street Dance, Musical Theater, Ballet, and more. Students combine English language courses with professional dance instruction.
• Kaufman Music CenterminorChannel Partner/ Reseller/ DistributorPartner for English Plus Music program. One of the finest community performing arts schools in the U.S. Provides private instruction in voice training and instruments. NYC-based professional musicians contribute to music program.
• New York Film AcademyminorChannel Partner/ Reseller/ DistributorPartnership for English Plus Filmmaking program. Students complete 4 weeks Intensive 30 English then 4 weeks at NYFA for hands-on filmmaking workshop. Earns 4 credits recommended for transfer. Students write, shoot, direct, and edit three short film projects or acting for film.
• PhotoUno StudiominorChannel Partner/ Reseller/ DistributorPhotography partner for English Plus Photography program. Boutique photography studio offering crash courses in Digital Photography and Photographing NYC. Students learn from experienced professionals while improving English.

Scale indicators10 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Berlitz: Incumbent global language instruction operator with strong corporate/immersion focus and translation services — broader portfolio but overlapping with Rennert's corporate English and Rennert Translation Group.
• TransPerfect: Global enterprise translation/localization and interpretation services leader; directly comparable to the Rennert Translation Group (incl. simultaneous interpretation at major events) while operating at vastly greater scale.

Regional players

• Zoni Language Centers: New York-area ESL and TESOL training provider with multiple campuses in the NYC metro — directly comparable in geographic delivery, ESL product, and TESOL certification verticals.
• New York Language Center: NYC-focused ESL school with multiple Manhattan/Brooklyn locations serving international students — geographic and segment overlap with Rennert's Manhattan adult English vertical.

Direct peers

• Kaplan International: One of the largest global English-language school operators with US delivery (including NYC area), university pathway partnerships, and online/TESOL extensions — directly comparable to Rennert's consumer + corporate + university pathway model.
• EF Education First: World's largest private language-school operator with US-bound intensive English programs (EF New York), corporate English (EF Corporate), TESOL, and youth programs — overlapping on virtually every Rennert vertical at much larger scale.
• LSI (Language Studies International): Multi-city English language school operator with a New York center; comparable general English, exam prep, and academic pathway offerings targeting international students.
• Wall Street English: Globally scaled adult English provider emphasizing executive/business English, with hybrid online and in-center delivery. Overlaps with Rennert's executive and corporate programs and is a comparable business-English specialist.
• ELS Education Services: Operates on-campus US intensive English programs affiliated with universities, including multiple NYC-area sites. Closest structural analog to Rennert's on-campus ESL + university pathway delivery model.
• EC English Language Centres: International chain of English language schools (including New York) offering intensive, academic, business, and exam-prep courses — directly comparable in product mix and consumer positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/RennertNewYork
• Facebookfacebook.com/RennertNewYorkEnglishLanguageSchool
• LinkedInlinkedin.com/company/rennert-international
• Instagraminstagram.com/rennertnewyork

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rennert International