Numbeo

Numbeo maintains a cost-of-living and quality-of-life database covering housing, crime, healthcare, transport, pollution and related indicators, built from crowdsourced reports combined with automated market-data collection and statistical validation. It publishes cost-of-living and property-price indices by city and by country, along with calculators for taxi fares, gas prices, salaries and relocation, and a quality-of-life index. The database totals 9,904,383 prices across 12,860 cities, entered by 888,168 contributors, according to the site's own count. Users named on the site include expats, researchers, relocation professionals, businesses and other decision-makers who compare cities, plan moves, and make investment or policy decisions with the data.

Advertising formats named on the site include banner placements, sponsored content, newsletter features and custom integrations, reaching an audience across email and web channels. Its ads.txt file lists 118 ad system lines, with 50 direct and 97 reseller entries, and names Publift Pty Ltd. and M.D. PRIMIS TECHNOLOGIES LTD among its sales houses.