Uncompromising quality
We don't compromise on quality. Outstanding results, precise preparation, and attention to every detail are the standard for everything we do.
About us
Achivr is a corporate business English education company, built for firms that run and operate in English. We don't run classic language courses. We build measurable business communication programs and combine one-on-one mentoring with native speakers and our own AI platform, giving management clear visibility into employee progress and program ROI.
At the heart of our work is BASTION, our AI platform that analyzes data from every session and shows HR and management progress, employees' readiness to work in English, and return on investment, at the individual, team, and company level. We work with international corporations and companies from more than 15 industries, and we're proud to be their first choice for long-term partnership.




Every program starts with a diagnostic, and progress is tracked and proven in every session.
You work with a mentor assigned only to you, from our team of bilingual and native (UK/US) instructors experienced across 15+ industries.
We analyze vocabulary, pacing, pauses, and speaking confidence, and give clear feedback after every lesson.
We build the program around real business situations: presentations, negotiations, and client calls.
Our platform
BASTION is our AI platform that analyzes data from every session and shows HR and management progress, employees' readiness to work in English, and program ROI, at the individual, team, and company level.
Every session is analyzed: vocabulary, intonation, pauses, and speaking pace, with detailed feedback.
Management sees where English communication could affect results, by team and department, before it becomes a problem.
One place with every employee's, team's, and the whole company's progress, role-readiness, and clear program ROI.
Company diagnostic
Before the program starts, we map business English proficiency across the whole company, by employee, team, and department. AI diagnostics deliver a Communication Index (0–100) and a communication profile across five dimensions, with no subjective judgment calls, so you know exactly where to invest and what to track.
Our journey
Founder Institute
We go through the Founder Institute accelerator and lay the foundations for growth. The Western Balkans is our first market.
Expansion into AI
We start building our own AI analytics for business communication and expand into the Southeast European market.
BASTION
We launch BASTION, an AI platform for session analytics and HR reporting.
Global expansion
We enter the MENA market and continue expanding into new markets.
From multinational corporations to regional leaders, Achivr is the first choice for long-term partnership, with learners from more than 15 industries.
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Stefan Mrvaljević
Founder & CEO, Achivr Educational Technologies
MSc, Lund University
Founder
Stefan Mrvaljević is the founder and CEO of Achivr Educational Technologies. A Chevening Scholar at University College London (UCL) and a Swedish Institute scholar at Lund University, as well as a Founder Institute alumnus.
Before Achivr, he spent brief stints in academia and diplomacy before dedicating the last decade to mentoring. Through more than 22,000 hours of one-on-one work with leaders across 20+ industries, he has advised leading CEOs and COOs across the Western Balkans, including teams from companies such as Coca-Cola, Banca Intesa, M:tel, Addiko Bank, IFFCO, ManpowerGroup, and CBS International.
He is the author of two TOEFL handbooks and the creator of the course "Ultimate TOEFL Mastery." He founded Achivr with one idea: to bring professionals and companies from Eastern and Southeast Europe the same standard of business English communication as their partners and competitors in the West.
Why Achivr
We don't compromise on quality. Outstanding results, precise preparation, and attention to every detail are the standard for everything we do.
Expertise is at the heart of our company. Our methodology and licensed materials are the result of years of research, development, and work with clients.
A human approach is the foundation of our work. We give every client the attention and support that helps them reach their full potential.
Book a call with our team or explore our corporate programs.