# Tolemi

> Tolemi is a Boston-based govtech company whose flagship platform, BuildingBlocks, stitches together scattered municipal data - property records, ownership, code violations, tax liens - into a single map-based interface. State and local governments use it to run spatial analysis, spot problem properties, and make faster, data-driven decisions about housing, land use, and neighborhood revitalization. Formerly OpportunitySpace, the company rebranded to Tolemi after Y Combinator and today serves cities from New York to small towns across the U.S.

- **Founded:** 2013
- **Headquarters:** Boston, United States
- **Founders:** Andrew Kieve (Co-Founder & CEO), Nico Tejera (Co-Founder & CTO)
- **Team size:** ~28 employees
- **Products:** BuildingBlocks, Housing Strategies, Data for Housing Solutions
- **Notable:** Rebranded from OpportunitySpace to Tolemi after completing Y Combinator (W2017)., Platform (BuildingBlocks) launched in 2016 and deployed across nearly every U.S. region., Data for Housing Solutions initiative reached 17+ cities and was highlighted at the Clinton Global Initiative.

## Products & services

- **BuildingBlocks** — A map-based application that connects and continuously updates data held across departments and agencies. It mines property and ownership data, applies proprietary analytics and machine learning, and lets government staff run advanced spatial analysis, find answers in seconds, and automate reports in a single interface.
- **Housing Strategies** — A configured version of the platform focused on preserving and building affordable housing, keeping families in their homes, combating predatory investors, and putting publicly-owned real estate to community benefit.
- **Data for Housing Solutions** — A cohort program run with Accelerator for America providing participating cities no-cost access to a custom version of BuildingBlocks to advance local affordable-housing strategies.

## Achievements

- Rebranded from OpportunitySpace to Tolemi after completing Y Combinator (W2017).
- Platform (BuildingBlocks) launched in 2016 and deployed across nearly every U.S. region.
- Data for Housing Solutions initiative reached 17+ cities and was highlighted at the Clinton Global Initiative.
- Deployed in cities as large as New York City and as small as Sherman, Texas.

## Latest updates

- **2024-09** — Data for Housing Solutions highlighted at the 2024 Clinton Global Initiative in New York for advancing affordable-housing strategies in 17+ cities.
- **2023-01** — Accelerator for America and Tolemi launched the inaugural Data for Housing Solutions cohort, giving 12 cities no-cost access to a custom BuildingBlocks.

## Links

- Website: https://tolemi.com
- LinkedIn: https://www.linkedin.com/company/tolemi
- Twitter/X: https://twitter.com/tolemihq

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Profile page: https://yespress.io/tolemi
Published by YesPress — https://yespress.io
Last updated: 2026-07-02