Top 5 Companies for GIS System Modernization & Integration in 2026
For many organizations, GIS sits behind decisions about assets, locations, routes, risks, and long-term planning. But in reality, a large share of GIS systems still run on architectures designed years ago – on-prem setups, tightly coupled services, slow map rendering, and data pipelines that don’t scale. As data volumes grow and expectations shift toward real-time insights, those systems start to hold teams back.
“When a system was built for yesterday’s problems, today’s teams spend more time fighting the technology than solving real business challenges,” – Andrew Lychuk, co-founder of Corsac Technologies.
That’s why modernizing an existing GIS platform, or building it right from the ground up, requires a reliable and experienced software development and modernization provider. In this post, we gathered 5 tech firms that help enterprises build scalable, secure, and tailored GIS solutions to support digital transformation.
Corsac Technologies
Corsac Technologies focuses heavily on legacy system modernization. From their positioning, they don’t just “rewrite code”. They start by understanding where old GIS platforms slow down operations, analytics, or scaling. Corsac developers often work with monolithic systems, outdated databases, and hard-to-extend custom GIS tools. Corsac is a good fit when a company already has critical spatial data, but the technology around it is fragile, expensive, or blocking new features like cloud deployment or modern map visualization.
“We help companies rebuild their technical foundation, so growth becomes possible again” – Igor Omelianchuk, CEO of Corsac Technologies.
Accenture
Accenture operates at enterprise scale. In GIS-related projects, they usually come in when organizations need large system integration: combining GIS with ERP, IoT, digital twins, asset management, or government platforms. They work a lot with cloud GIS, Esri ecosystems, and data platforms. Accenture is less about small custom tools and more about transforming GIS into part of a broader digital landscape across departments and regions. Set up in 1989, the company specializes in consulting. Their work covers modernizing legacy GIS ecosystems, connecting them with enterprise IT systems (ERP, IoT, analytics) and helping organizations use spatial data within broader digital platforms.
Intellias
Intellias is strong in building a GIS software from scratch or modernizing legacy systems that are holding you back. They openly talk about building GIS platforms, spatial analytics systems, and map-based applications for industries like mobility, logistics, and smart cities. What stands out is their ability to either build a GIS solution from zero or modernize an existing one without stopping business operations. If your legacy system works “well enough” but blocks innovation, Intellias typically focuses on gradual modernization rather than a risky full rewrite.
Andersen
Andersen positions itself as a full-cycle software development provider with GIS expertise. They work on mapping solutions, geospatial data processing, and system integration. Andersen is often chosen when a company needs a large, scalable development team to either extend an existing GIS system or replace outdated modules step by step. Their strength is execution and coverage across backend, frontend, and data layers.
Leanware
Leanware is a product-oriented and cost-efficient choice for startups and mid-sized companies. They build GPS- and GIS-driven applications such as tracking systems, route optimization tools, and location-based dashboards that focus on real user needs. Leanware is a good fit when speed and flexibility matter more than heavy enterprise governance, and they’re often involved in building GIS software from scratch or modernizing smaller legacy systems with clean, modern architectures.
To sum up, building and modernizing GIS systems is about making spatial data work for the business today and stay relevant tomorrow. The right partner can take the technical burden off your shoulders to reduce legacy constraints, scale with data growth, and integrate GIS into real operational workflows.
The companies listed in this post have a deep industry expertise and take different approaches to GIS software. The choice depends on your goals, system complexity, and pace of change.