Ontoum is a Cameroon-focused classified advertising platform that helps people discover listings and connect with sellers, service providers, and employers. Users can browse by city or region, including Douala, Yaoundé, Bamenda, and other locations, or create an account to post an advertisement.

The platform covers a broad range of categories. Its real estate listings include land, homes, rentals, commercial property, venues, and short-term accommodation. Users can also explore job offers, training and learning opportunities, local events, and services such as moving, repairs, construction, travel, beauty, and business support. Marketplace categories include cars and other vehicles, electronics, phones and tablets, fashion, beauty and wellness products, and pets.

Listings display details such as category, location, price where available, posting date, and seller contact options. Ontoum provides browsing and listing features, pricing information, account registration and login, and mobile apps for iOS and Android. The site also offers help and safety resources, including an FAQ and anti-scam guidance.