About us

A division of Esri Canada

Esri Canada acquired Ratio.City, a Toronto-based software and data company, in September 2023. This acquisition has expanded Esri Canada’s community planning solutions portfolio and allows you to complement your ArcGIS-based planning systems and workflows with Ratio.City’s innovative web-based GIS data and tools to accelerate and optimize city planning and land development.

Read the announcement here.

Our Mission

From locating land parcels to modelling buildings, we put all the data and tools you need in one easy-to-use platform so you can focus on creating solutions and advancing your projects. Our ultimate goal is to help you quickly determine the feasibility of your projects and accelerate the overall planning process.

At the end of the day, it's about bringing together data and technology so we can build more livable, equitable communities together.

Our Story

Ratio.City was founded by Monika Jaroszonek and Erin Morrow to help city builders and planners reduce inefficiencies in the planning process and focus on building exceptional solutions.

Monika and Erin’s shared background in urban planning and development made them intimately aware of the challenges faced in the preliminary planning phases. As a former architect, Monika handled millions of square feet in mixed-use development and needed a faster way to mock up designs. Erin came at the problem from a planner's perspective and needed easier access to zoning and policy information.

Together, they realized that a data-driven platform could breakdown silos and make fragmented information more accessible to city builders. From there, they built Ratio.City from the ground up—combining data analysis and site visualization into a powerful planning tool.

Meet the founding team

Monika Jaroszonek

Managing Director, Planning & Housing Division and Ratio.City Co-Founder
Erin Morrow

Product Director, Ratio.City and Ratio.City Co-Founder
Siva Srikukenthiran

Technology Director, Ratio.City
Katharine Stanbridge

Industry Engagement Manager, Planning & Housing Division