Ontocore specializes in self-leadership development, focusing on personal growth and transformation. Their unique approach is centered around helping individuals identify and express a more authentic version of themselves as leaders. The company emphasizes the importance of knowing one's unique purpose and awakening an individual's full potential. Their training programs are designed to inspire greater performance through self-awareness and personal expression as leaders.

ONYX Academy specializes in offering high-level courses, seminars, workshops, and masterclasses in the fields of beauty, wellness, aesthetics, marketing, and business. The academy focuses on personal and professional growth to help transform individuals' passions into successful and fulfilling careers. Operating since 2008, ONYX Academy has trained over 50,000 students, leveraging more than 30 locations for in-person learning and providing online options. Their unique selling point involves the collaboration with major experts in their respective fields.

OOSE eG is a Hamburg-based training company with over 20 years of experience, offering seminars, workshops, and coaching sessions across the German-speaking region. As a cooperative with over 120 different seminars and a client base of more than 5,500 customers and 20,000 participants, their unique selling point lies in self-organized work structures without formal leaders, fostering a collaborative learning environment. The company emphasizes continuous improvement and development in educational content and delivery.

Opeaklife, founded by accredited life coach Lisa Wong, specializes in personal transformation and self-development coaching. The company uses coaching methodologies that integrate NLP, mindfulness, and sensory intelligence to promote profound changes in clients' lives. They offer customized programs for individuals and corporate clients, focusing on developing emotional intelligence, overcoming stress or anxiety, and building confidence for personal and professional growth. Their unique selling point is the blend of therapeutic techniques aimed at empowering individuals to live fulfilling and purposeful lives.

Opencertif specializes in supporting small and medium-sized enterprises (SMEs) through their digital transition, focusing on projects that integrate artificial intelligence (AI) and cybersecurity. Since 2013, Opencertif has been the official representative of CERTIPORT Pearson VUE in France, providing tailored solutions to improve economic performance and employee motivation by automating repetitive tasks with AI. The company offers cybersecurity solutions to protect websites and IT infrastructures from cyber threats and is a key certifying authority for IT skills for universities and training organizations. Opencertif's mission includes conducting audits for improvement, assisting in digitization, and offering global certifications that exemplify their expertise and responsiveness. The company supports a wide array of client needs through customizable service packs and provides financial assistance for project success.

Open Dawes Training specializes in enhancing communication skills, with a strong focus on presentation and public speaking. Their interactive training and coaching aim to boost confidence, ability, and willingness to effectively engage in various professional scenarios, from pitching and interviewing to managing tough conversations. They offer tailored support to optimize communication in sales and meetings, as well as helping sports professionals communicate effectively with stakeholders. Their unique approach emphasizes personal development and leveraging individual strengths to unlock potential opportunities and ensure impactful communication.

Open Door Coaching specializes in providing premier coaching qualifications and training in Australia. Their courses are unique as they offer pathways to attain both International Coach Federation (ICF) credentials and Australian Government-accredited qualifications in workplace coaching. The programs include the Diploma of Organisational Coaching and Certificate IV in Workplace and Business Coaching, accredited as Level 1 and Level 2 by ICF. Open Door Coaching is recognized for delivering tailored services for individuals seeking to upgrade their coaching skills to the highest levels, offering practical toolkits for team coaching and leadership workshops. The company sets itself apart with its commitment to building high performance in the workplace through professional coaching.

Open the Doors Coaching, led by certified sex coach and clinical sexologist Kristen Thomas, specializes in relationship and personal development training. The company offers both online and in-person workshops, focusing on emotional intelligence, communication, and relationship building. Unique selling points include a strong emphasis on inclusivity, LGBTQ+ activism, and a personalized coaching approach. Content includes courses on sensual self-care, couples reconnection, and mindset, supported by a podcast that discusses complex topics in love and relationships.

Opportunity Global partners with organizations and charities to develop bespoke training programs that combine technical skills with human-centric aptitudes. Their focus is on preparing candidates for the future by instilling confidence and capability. The company emphasizes life-long learning and offers short programs tailored to improve communication, data-driven decision-making, and resilience in the workforce. They also address social issues such as menopause awareness to enhance workplace understanding. Unique aspects of their offerings include a mixture of technical and personal skill development, a focus on adaptability and resilience, and courses related to emerging fields like Cyber Security.

Opportunity Knocks of Wisconsin, spearheaded by Wendy Terwelp since 1998, offers highly interactive training programs specializing in career advancement, personal branding, and networking skills. Their unique methods focus on helping clients identify their strengths, communicate value effectively, and build networks to achieve career and professional development goals.

Optima Training (UK) Limited specializes in coaching, meeting facilitation, and business training to enhance individual and team performance. With over twenty years of experience, the company prides itself on delivering tailored training solutions that stimulate innovative business ideas. Their expertise includes leadership, communication, and management training, highlighting their commitment to making a significant impact on organizations and professionals.

Optimus Coach Academy offers ICF accredited coach training focusing on psychology-based and scientific coaching approaches, utilizing their unique Brain Focused Coaching Method. Their courses are accredited by leading global organizations such as the International Coaching Federation, the European Mentoring and Coaching Council, and the Association of Coaching. They emphasize a holistic, evidence-based approach to help clients achieve sustainable change, providing a rich understanding of human cognition, emotion, and behavior. The academy supports aspiring coaches with various techniques, online business programs, and mentoring. Two diploma levels are offered, with pathways to ACC and PCC ICF accreditation. Group sizes are kept small to ensure a good trainer/student ratio and intimate learning environment.