Kerstin Herter

What Kerstin Herter does

STRESSFREI.digital is a German sole proprietorship (Einzelunternehmen) operated by founder Kerstin Herter from Rheinbach, founded in 2018 to deliver anti-stress training programs tailored to screen-based work. The company targets corporate clients, hotels and spas, schools, and individual consumers across Germany, addressing the physiological and psychological impacts of sustained digital screen exposure—including eye strain, headaches, fatigue, sleep disturbance, and reduced motivation—through structured training methodologies grounded in visual science and adapted from elite-sports visual training. Kerstin Herter's positioning as both a trained Augenoptikerin (optician) and Dipl. Betriebswirtin (business economist) anchors the value proposition that the eyes, which consume roughly 60% of brain capacity and process approximately 90% of digital information, are the central lever for stress reduction in digital work.

The product portfolio comprises four core offerings: the Impulsvortrag (keynote/impulse lecture), team workshops, the STRESSFREI.digital-Box (a physical eye-training toolkit), and the published book "Digitaler Stress: Das Auge surft mit" available in print and e-book. A fifth line, the 2020-launched non-profit "Digitaler Durchblick" school initiative, extends the company's reach into children's media literacy. The proprietary asset is the Augenoptisches Trainingskonzept—a structured visual training concept adapted from sports-science methodology and packaged into repeatable exercises. Underlying technology infrastructure consists of standard SaaS tools: Kajabi for digital content delivery, Digistore24 for digital-product payment processing, ActiveCampaign for email marketing, and Calendly for meeting booking.

The business model blends professional-services revenue (keynotes and corporate workshops booked via direct contact and Calendly), one-time physical-product sales (the STRESSFREI.digital-Box and book via Amazon), and recurring digital content subscriptions delivered through Digistore24 and Kajabi. Go-to-market is sales-led and founder-driven, combining content marketing (blog, email newsletter, organic social), live speaking engagements at corporate and hospitality events, and direct outreach. The company is bootstrapped with no disclosed external funding and operates with 1–10 employees, with all named customer relationships (Hoesch & Partner GmbH, The Lifesight Company GmbH, Bankingclub, Leaders Academy, Diversity Is Us, Sahra Remmel) anchored on the founder's personal brand.

Name

Kerstin Herter

Legal name

Kerstin Herter

Website

https://stressfrei.digital

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

1–10 employees

Short description

STRESSFREI.digital is a German founder-led sole proprietorship established in 2018 by optician Kerstin Herter that delivers screen-work anti-stress programs, corporate workshops, a physical eye-training toolkit, and a published book to corporate clients, hotels, schools, and individual consumers.

Ownership category

akta.pro rank

Product category

Workplace Wellness Services

NAICS

Other Scientific and Technical Consulting Services (54169)

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

Stress Management & Burnout Prevention Coaching (HSADAGAD)

akta.pro secondary industry

Mindfulness, Meditation & Stress Management Education (EDAAAHAD)

Keywords

• Digital wellness programs
• Eye training services
• Stress management
• Screen ergonomics
• Workplace wellbeing

Headquarters

HQ city

Rheinbach

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Marketing or Sales, Operations, Supply Chain

Revenue model

1. Speaking Engagements: Keynote and impulse lectures on digital stress reduction booked directly by corporate clients, event organizers, and hospitality venues.
2. Workshops: Corporate workshops providing anti-stress strategies, practical eye training, and guidance on integrating healthy digital routines into daily work life.
3. STRESSFREI.digital Box: A practical tool kit for eye relief during screen work, providing quick stress reduction and healthy routine integration.
4. Book Sales: The book 'Digitaler Stress: Das Auge surft mit' sold as both e-book and bound edition through Amazon and direct ordering.
5. Digital Products & Content: Digital content, training videos, internal FAQs, and handbooks delivered through Kajabi platform. Sales processed via Digistore24.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

STRESSFREI.digital, the business operated by Kerstin Herter, delivers anti-stress programs targeting people who work with screens. The offerings include keynote presentations (Impulsvorträge), team workshops, a physical STRESSFREI.digital-Box toolkit, and a published book on digital stress, all centered on eye training and digital stress reduction.

Product overview

STRESSFREI.digital is a digital wellness company founded by Kerstin Herter in 2018, offering an anti-stress program for screen work. The product portfolio consists of four interconnected offerings: (1) the Impulsvortrag (keynote speech) that provides new perspectives on digital stress through presentations and eye exercises, (2) the Workshop designed for teams to integrate eye training and stress reduction into daily routines, (3) the STRESSFREI.digital-Box containing practical eye training tools for quick eye revitalization, and (4) the Buch 'Digitaler Stress' serving as a comprehensive guide to managing digital consumption. Additionally, the non-profit school initiative 'Digitaler Durchblick' extends the company's reach into educational settings for children. All offerings center on Kerstin Herter's expertise as an optician, focusing on the connection between eye health and digital stress reduction.

Differentiator

Problem solved

Functional benefit

Products and services

• Impulsvortrag (Keynote Speech)
• Workshop
• STRESSFREI.digital-Box
• Book "Digitaler Stress"

Quantifiable outcome

• 90% of digital information is processed through the eyes
• +2 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature1 record

Partnerships

One partnership is on record.

• Digistore24 GmbHminorChannel Partner/ Reseller/ DistributorDigistore24 serves as the reseller for STRESSFREI.digital's digital products. The company processes payments and handles order fulfillment for digital content and products sold through the Digistore24 platform.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Emerging players

• Kaia Health: Kaia Health is a digital therapeutics company offering app-based programs for pain, musculoskeletal, and mental health conditions, including stress. It overlaps with STRESSFREI.digital as a digitally delivered self-management platform for stress-related symptoms, though its scope is broader.
• Wysa: Wysa is an AI-driven mental health and wellbeing chatbot used by employers and health plans. It is comparable as a digitally delivered, employer-targeted stress and mental wellness product addressing overlapping workplace wellbeing needs.
• Welltory: Welltory is a stress and energy management app that uses HRV and biometric data to coach users on stress recovery. It is comparable as a consumer/employer-facing digital stress measurement and coaching tool competing for the same corporate wellness dollar.
• Sanvello (Optum): Sanvello is a digital mental health platform offering self-guided stress, anxiety, and wellbeing support, often distributed through employers and health plans. It is comparable as an employer-channel digital stress management product in the same workplace wellbeing category.
• Mindspace (corporate mindfulness): Mindspace-style providers (e.g., corporate mindfulness vendors) offer in-person and digital mindfulness training to enterprises, closely mirroring STRESSFREI.digital's workshop-and-keynote model for corporate clients.

Broad incumbents

• Headspace: Headspace is a global digital mental wellness and mindfulness platform with strong B2B employer offerings. It is comparable as a broad incumbent in the digital mental wellness space where STRESSFREI.digital operates, though it is not specialized in eye-health or screen-work stress.
• Calm: Calm is a leading global meditation, sleep, and mental wellness app with employer and consumer products. It competes for corporate wellness budgets addressing stress, making it a broad incumbent peer in the same theme as STRESSFREI.digital.
• ZEISS Vision Care: ZEISS is a global optical and vision-care company with lenses, eye-care professional services, and digital eye-health initiatives. It is comparable as a broad incumbent in eye health whose expertise and product ecosystem sit adjacent to STRESSFREI.digital's optician-led screen-eye stress niche.

Direct peers

• 7Mind: 7Mind is a Germany-based digital mindfulness and meditation platform offering corporate and consumer subscriptions. It directly overlaps with STRESSFREI.digital on the digital stress reduction / mental wellness theme and shares the German DACH market.
• NeuroNation: NeuroNation is a German brain-training and cognitive wellness platform with consumer and enterprise offerings. It is comparable to STRESSFREI.digital as a German-rooted digital wellness company addressing cognitive load and brain performance for screen-based work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/stressfreidigital
• Instagraminstagram.com/stressfrei.digital
• LinkedInlinkedin.com/company/stressfrei-digital

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Kerstin Herter