jstack

What jstack does

jstack N.V. is a privately held Belgian custom software development and digital agency, headquartered in Kontich (Antwerp) with a regional office in Breda, Netherlands, operating across the Benelux market. Its core offering is end-to-end digital product development — covering custom software, web and mobile applications, integrations and APIs, digital strategy, and consultancy — delivered through a full-stack team using React/Angular/Next.js on the front end, Node.js/Java on the back end, PostgreSQL and MongoDB for data, Docker for DevOps, and Azure/Google Cloud/AWS for hosting. AI is positioned as a discrete service line built on PyTorch, Keras, TensorFlow, and Python.

The company monetizes almost exclusively on a professional-services model, with quote-based, multi-year project engagements and free introductory consultations. Its go-to-market is consultative and direct: sales-led outreach to mid-market and enterprise accounts in Belgium and the Netherlands, supplemented by organic content marketing (blog, LinkedIn, Facebook). Customers span healthcare (Antverpia, medication management), B2B sales (Billiet, Huntsmen), HR/tech (Cortexter, Likewise.ly), government (Dutch Ministry of Foreign Affairs BuZa, Belgian Federal Pension Service), maritime (Damen Shipyards), and leisure (Beekse Bergen), with a dedicated startup-guidance track as a smaller persona.

Its named differentiator is the proprietary 4xO methodology, a research-and-context-first framework marketed specifically to counter the cited 70% IT project failure rate; the firm has no disclosed external funding, no institutional investors, no parent company, and no published revenue, and operates as an independent N.V. with 11–50 employees.

Name

jstack

Legal name

jstack N.V.

Website

https://jstack.eu

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

jstack is a privately held Belgian custom software development and digital agency with offices in Kontich (Belgium) and Breda (Netherlands), delivering web, mobile, AI, integration, and digital-strategy projects to mid-market and enterprise clients across the Benelux via its proprietary 4xO methodology.

Ownership category

akta.pro rank

Product category

Custom Software Development Services

NAICS

Computer Systems Design and Related Services (54151)

SIC

Services-Computer Programming Services (7371), Services-Management Consulting Services (8742)

akta.pro primary industry

DevOps Consulting & Transformation (BPAEAKAA)

akta.pro secondary industry

DevOps, SRE & Platform Engineering Consulting (BPAHAEAK)

Keywords

• Custom software development
• Web and mobile apps
• AI-driven development
• Digital strategy consulting
• Software integrations and APIs

Headquarters

HQ city

Amsterdam

HQ country

Netherlands

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Custom Software Development: Design and development of custom digital products and services from initial concept to professional online platform deployment. Services include web applications, mobile applications, AI-driven solutions, integrations and APIs, and digital strategy consulting.
2. Consultancy Services: Advisory services for scalable architecture setup, digital project guidance, functional analysis, and technical consultancy provided by strong backend and frontend developers.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

jstack is a Benelux-based digital agency that designs and builds custom software, web and mobile applications, AI-driven solutions, and integrations/APIs for organizations, complemented by digital strategy and technical consultancy. Engagements are structured around the firm's proprietary 4xO methodology, which emphasizes upfront research, context gathering, and ROI mapping to mitigate the high failure rate of IT projects.

Product overview

jstack is a custom software development company offering a portfolio of services centered around software development. The core offerings include Software op maat (custom software development), Web & Mobile apps, AI-driven development, Integraties en API's, Digitale strategie, and Consultancy. The company differentiates itself through its proprietary 4xO-methode methodology, designed to prevent IT project failures by focusing on research, understanding context, and ensuring return on investment. jstack works across multiple sectors including healthcare, government, maritime, leisure, and B2B, with offices in Belgium (Antwerp/Kontich) and the Netherlands (Breda). The company employs a full-stack development team and utilizes technologies including React, Angular, Node.js, Python, PostgreSQL, MongoDB, and various cloud platforms (Azure, Google Cloud, AWS).

Differentiator

Problem solved

Functional benefit

Products and services

• Software op maat (Custom Software Development) End-to-end design and development of custom digital products and services, from initial concept through to a professional online platform, translating creative ideas and business objectives into results. Targeted at organizations in the Benelux lacking internal custom-software expertise.
• Web & Mobile Apps Innovative application development for both web and mobile platforms, leveraging a full-stack development team to rapidly build complex applications. Targeted at organizations needing custom web and mobile product delivery.
• Digitale strategie (Digital Strategy) Development and execution of a digital strategy grounded in people, knowledge, and process, with jstack acting as a long-term partner in the organization's digital journey.
• AI-driven development Design, development, and implementation of AI-based solutions for companies, incorporating frameworks such as PyTorch, Keras, TensorFlow, and Python. Targeted at organizations that need to operationalize AI capabilities but lack the technical knowledge in-house.
• Integraties en API's (Integrations and APIs) Integration of existing or custom-built software packages and the building of APIs to meet specific organizational needs. Targeted at organizations needing to connect disparate systems or extend existing software with custom APIs.
• Consultancy Advisory service delivered by experienced back-end and front-end developers covering scalable architecture setup, guidance on digital projects, and functional analysis writing. Targeted at organizations needing senior technical advisory beyond implementation work.

Named customers10 records

Segments6 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators2 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Xebia: Dutch-origin IT consultancy and software development firm with full-stack and cloud capabilities across Benelux and globally. Comparable to jstack on custom software development, DevOps/cloud stack, and enterprise field-sales motion.
• Bounteous: Digital experience agency specializing in custom digital product development, integrations, and AI-driven solutions for enterprise. Comparable to jstack on service mix (custom dev + integrations + AI) and consultative enterprise sales motion, though at larger scale and US-centric.
• Incentro: Dutch digital consultancy delivering custom software, integrations, and digital transformation for enterprise clients. Comparable to jstack on tech-consulting profile, integrations/API work, and Benelux mid-market/enterprise focus.
• Hoppinger: Rotterdam-based digital product agency building custom web and mobile platforms, often integrating with marketing systems. Closely comparable to jstack in size, Benelux geography, and custom digital product focus.
• Info Support: Dutch software development and consultancy firm specializing in custom application development for enterprise and government. Comparable to jstack on full-stack dev, Benelux focus, and long-term partnership engagements.
• Cegeka: Belgian-headquartered IT services and digital transformation firm offering custom software, cloud, and consultancy across Benelux. Directly comparable to jstack in geography, service mix (custom dev + consulting), and enterprise/government client base.

Broad incumbents

• Netcentric (Cognizant): Adobe-focused digital consultancy operating across Europe with custom integration and web platform capabilities. Comparable to jstack on custom integrations and Benelux presence, but with a narrower platform specialization and larger backing since Cognizant acquisition.
• Thoughtworks: Global technology consultancy providing custom software development, digital strategy, and AI services to enterprise clients. Overlaps with jstack on full-stack custom dev and AI offerings, but at significantly larger scale and broader geographic reach.
• Dept Agency: Larger Amsterdam-headquartered digital agency offering web, mobile, AI, and marketing technology services globally. Overlaps with jstack on web/mobile/AI capabilities but operates at significantly larger scale and broader portfolio.

Regional players

• Trifork: European IT consultancy delivering custom software development with strong DevOps and cloud-native focus. Comparable to jstack on tech stack and services mix, but operates across multiple European countries rather than Benelux alone.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/jstack.eu
• LinkedInlinkedin.com/company/jstack

Revenue estimate

Valuation estimate

Number of profiles

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 jstack