Leading .NET Development Companies in Slovenia (2026)

Hiring a .NET development partner in Slovenia requires balancing technical depth, reliable delivery, and cost while ensuring effective communication and compliance with regional standards. Buyers often need to weigh platform expertise against scalability, cloud and DevOps capabilities, testing and security practices, and the clarity of commercial terms.

Compare providers on .NET stack proficiency, modern framework and cloud experience, DevOps and testing practices, scalability and team models, project management and communication processes, client references, and commercial terms. SoftPro is the featured international partner leading this list and serves buyers across the region as an option for cross-border .NET development and delivery.

1. SoftPro

SoftPro is the featured international partner on this list for organizations in Slovenia seeking seasoned .NET development support for regional delivery. The company is a fit for startups, small and medium enterprises, and corporate engineering teams that want remote EU-based teams and project delivery into Slovenia.

Their engineering practice centers on, .NET Core and C#, and they use Microsoft Azure to deliver cloud-native and migrated environments for enterprise CMS projects. SoftPro executes lift-and-shift migrations, containerization and cloud-native transformations, and provides ongoing maintenance and long-term support for modernized systems.

Key Highlights

• More than 20 years of combined team experience.
• Multi-cloud delivery that includes AWS in addition to Microsoft Azure.
• AI engineering capabilities with LLM integration, RAG architectures and ML model work.
• Published case studies and projects covering business portals, CRM/HRM systems, SaaS ETL platforms and Umbraco website work.

Services

• Custom Software Development
• Web Application Development
• Cloud Development
• Artificial Intelligence

Contact Information

Website: soft-pro.pl

Phone: +48 571 282 759

Address: Poland, Warsaw, Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401

LinkedIn: www.linkedin.com/in/kyrylo-o

2. ASCALab d.o.o.

ASCALab d.o.o. is a Ljubljana-based engineering firm that builds enterprise software on the .NET stack, using C#, .NET Core and for modernisation, data-platform and cloud-ready applications. They focus on delivering stable, maintainable systems that run across desktop, web and cloud environments.

The company embeds engineers into client workflows to take ownership of delivery and long-term maintenance, making them a fit for projects that require sustained .NET expertise in regulated and mission-critical domains like banking and large data warehouses.

Key Highlights

• ASCALab holds ISO 9001 and ISO 27001 certifications.
• The firm lists more than 100 engineers on its team.
• ASCALab is the creator of myQAbee, a codeless test-automation product developed from its testing practice.
• The company implements CI/CD and cloud-migration pipelines across Azure, AWS and GCP.

Services

• Development as a Service
• DevOps as a Service
• Testing as a Service

Contact Information

Website: ascalab.com

Phone: +386 40 649 101

Address: Rožna dolina, cesta II 7, 1000 Ljubljana, Slovenia

LinkedIn: si.linkedin.com/company/ascalab

3. Indigo Labs d.o.o.

Indigo Labs d.o.o. is a Ljubljana-based engineering partner that builds custom software with AI integrated into the delivery process. The team combines senior engineers, architecture reviews, and rigorous code review to produce production-ready systems that remain maintainable for years.

The company began as .NET enthusiasts and continues to operate strong .NET back-end capabilities alongside modern stacks when projects require them, using AI-augmented senior teams to accelerate delivery while keeping ownership and long-term maintainability of the codebase.

Key Highlights

• Microsoft Solutions Partner for Digital & App Innovation, designation re-verified annually.
• Rated 5.0 on Clutch for client satisfaction.
• Engagement models include fixed-scope (typical delivery 5–15 days), dedicated teams, and time & material; tailored proposals are delivered within three business days after an introductory call and NDA.
• Delivery footprint across the Nordics, the United States and Europe, with participation at regional industry events such as Adria Security Summit 2026 and Game Changer Ljubljana 2026.

Services

• AI Journey
• For SMEs & Enterprises
• For ISVs
• For Startups

Contact Information

Website: indigo.si

Address: Ameri
61ka ulica 2, 1000 Ljubljana, Slovenia

Phone: +386 40 277 895

Email: hello@indigo.si

4. Dotcom d.o.o.

Dotcom d.o.o. is a Slovenian software and AI engineering firm that builds custom web and cloud applications, AI agents, and technology strategy for European clients. They deliver modular, well-documented architectures designed to be extended and maintained over time rather than rebuilt.

Dotcom uses C#/.NET among its production technologies alongside cloud, data, and integration tools, which positions the company as a practical .NET development partner in Slovenia. Their delivery model combines in-house product work with client projects and team augmentation to move prototypes into production.

Key Highlights

• Founded in 2008 and credited with 18 years of experience deploying production systems across Europe.
• Operates offices in Ljubljana and a branch in Sežana while serving clients across Europe.
• Delivered a manufacturing MES for Wärtsilä that runs at 30 production locations worldwide.
• Owns the MoreFromFood platform with over 800 active users, 15,000 checklists per month, and a reported 99% availability.

Services

• Custom software development
• AI solution development
• Team augmentation
• IT audits & consulting

Contact Information

Website: dot-com.si

Phone: +386 597 15565

Email: info@dot-com.si

Address: Šmartinska cesta 106, 1000 Ljubljana, Slovenia

Address: Partizanska cesta 82, 6210 Sežana, Slovenia

LinkedIn: linkedin.com/company/dotcom-d-o-o

5. Positiva rešitve d.o.o.

Positiva rešitve d.o.o. is a Ljubljana-based digital engineering firm that builds Microsoft‑stack enterprise web platforms, portals and system integrations for public institutions and commercial clients.

Their in-house teams cover full development lifecycles from architecture and backend integrations to UX, testing and post-launch support, which aligns them with complex, integration-heavy .NET projects.

Key Highlights

• Positiva is an official Umbraco Silver Partner.
• The company displays Microsoft Silver Partner and Azure specialist badges on its homepage.
• Its public portfolio lists clients such as Telekom Slovenije, Triglav Investments and SID Banka.
• The company’s official price list (effective 1.1.2025) lists .NET programming rates at 72 € for simple tasks and 78 € for complex tasks.

Services

• Umbraco CMS projects
• Hybrid mobile applications
• Electronic shelf labels (ESL) systems

Contact Information

Website: positiva.si

Phone: +386 1 620 33 13

Email: info@positiva.si

Address: Tržaška cesta 286 D, 1000 Ljubljana, Slovenija

6. Inetis Ltd.

Inetis Ltd. builds mission‑critical, data‑driven software and tooling for enterprise clients, developing across multiple platforms with C# listed among its programming languages and Windows included in its supported environments. The company emphasizes back‑end robustness and system integration, making it a fit for .NET projects that demand reliable server‑side implementations and database connectivity.

Inetis operates the Inetis DDV (Slovenian VAT) directory and exposes that dataset through web services, demonstrating production experience with real‑time data APIs and large public datasets. This combination of C# capability, Windows environment support, and a public VAT web service positions Inetis as a relevant .NET development partner in Slovenia.

Key Highlights

• Publishes SOAP and REST endpoints for the Inetis DDV (VAT) directory and documents integration options.
• Lists major enterprise projects including work for NLB (the largest financial group in Southeast Europe) and the Ljubljana Stock Exchange (SEOnet and Stock Exchange Monitor).
• Developed the FlyMe certified flight instrument app for FAI and released it on Google Play.
• Privacy policy states hosting with servers in the EEA and the United States and affirms GDPR compliance.

Services

• Web development
• Mobile apps
• Consulting
• Support & maintenance

Contact Information

Website: www.inetis.com

Phone: +386 3 4260000

Email: info@inetis.com

Address: Kidriceva ulica 25, 3000 Celje, Slovenia, Europe

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7. DEWESoft d.o.o.

Dewesoft d.o.o. designs and manufactures data acquisition (DAQ) instruments and measurement software used for synchronized multi-channel recording and analysis. Its product mix centers on modular SIRIUS hardware and the DewesoftX software platform for real-time measurement workflows.

The company maintains a developer ecosystem with plugins, extensions, and SDKs that enable custom integrations and automation for instrument control and data processing. That software-delivery and integration focus makes Dewesoft relevant to .NET development work in Slovenia that targets DAQ, test automation, and instrumentation workflows.

Key Highlights

• Product portfolio includes SIRIUS® modular DAQ systems and DewesoftX measurement software used across aerospace and automotive customers, with site references to NASA and ESA.
• Official developer resources include a Developer Portal, developer downloads, and manuals that document a Dewesoft NET interface and C#/dotnet examples.
• Operates Dewesoft Academy for professional courses and hands-on training alongside an EU-wide rental program that lists DewesoftX Enterprise included in rental plans.
• Maintains a global network of subsidiaries and distributors alongside its Slovenian entity, Dewesoft d.o.o., used for local support and deployments.

Services

• DAQ hardware
• Measurement software (DewesoftX)
• Instrument calibration services
• Training & Academy

Contact Information

Website: dewesoft.com

Phone: +386 3 5625300

Email: sales@dewesoft.com

Email: support@dewesoft.com

Address: Gabrsko 11a, Trbovlje 1420

8. Grasp d.o.o.

Grasp d.o.o. builds web applications, backend systems, process automation, and edge computer vision solutions, combining .NET backends with Vue/Nuxt front-ends and TypeScript to deliver production-ready software. The team delivers end-to-end projects where the same engineers design, implement, deploy, and maintain the solution to reduce handoffs and speed iteration.

As a small, direct studio based in Novo mesto, Grasp works with clients through close engineer-to-client collaboration and sustains long-term product relationships that include maintenance and ongoing updates.

Key Highlights

• Over 5 years of experience and more than 20 projects delivered.
• Completed an Enterprise REST API in 2024 that used PostgreSQL, Redis, and Docker.
• Builds and ships commercial products including ClockDoc and WebScada; WebScada’s implementation includes SQL Server and SignalR.
• Remote-first studio based in Novo mesto with a stated email response time of 24–48 hours.

Services

• Web applications
• Backend services
• Process automation
• Computer vision

Contact Information

Website: grasp.si

Email: info@grasp.si

Address: Novo mesto, Slovenia

9. Tritron d.o.o.

Tritron develops line-of-business applications built on the Microsoft .NET ecosystem for enterprise clients. The company has delivered projects for telecommunications, banking, and government customers and approaches engagements with consulting-led discovery followed by hands-on development.

Key Highlights

• Multilingual team that lists fluency in Slovenian, English, German, and Croatian.
• Registered company details displayed on the site: VAT SI14421801 and registration number 9829261000.
• Provides banking details for transactions, including IBAN SI56 6100 0002 9968 982 and SWIFT/BIC HDELSI22.
• Website footer shows active copyright year 2026, confirming current operations as of that year.

Services

• Consulting
• Applications
• Programming

Contact Information

Website: www.tritron.si

Email: info@tritron.si

Address: Mala Nova ulica 8, 9000 Murska Sobota, Slovenija / EU

10. Grasp (alternate listing)

Grasp is a small Slovenian software studio that builds production-grade backend systems with .NET while pairing those services with modern front-end frameworks and automation pipelines. The team emphasizes end-to-end delivery, taking ideas from first conversation to running production systems.

Their delivery model pairs clients directly with engineers and avoids account managers and subcontractors, which supports ongoing maintenance and iterative product shipping. This hands-on approach and .NET-centered backend work make Grasp a relevant inclusion on a 2026 list of leading .NET development companies in Slovenia.

Key Highlights

• 5+ years of team experience listed on the company site.
• 20+ projects delivered according to the firm’s published metrics.
• Built the ClockDoc time-tracking product in 2023 and continues to ship updates for it.
• Develops computer vision recognition models designed to run on edge and embedded hardware, not in a data centre.

Services

• Web Applications
• Backend Services
• Process Automation
• Computer Vision

Contact Information

Website: grasp.si

Email: info@grasp.si

Address: Novo mesto, Slovenia

Conclusion

Choose a Slovenian .NET provider by matching firm capabilities to your project needs, budget and timeline. Prioritize providers with modern .NET and cloud readiness for greenfield platforms, strong data and integration skills for enterprise back-ends, hardware and measurement expertise for instrumentation projects, and AI or automation experience when those elements are central to delivery.

SoftPro is the featured international partner on this list and is presented as a candidate for organizations seeking regional .NET delivery. Shortlist providers that meet your technical and compliance requirements, check recent case studies and client references, and validate fit with a brief pilot or technical interview before awarding the contract.