Marchex

Marchex is a local search and performance advertising company. They own the following brands:
- Marchex Adhere: A vertical advertising network.
- Marchex Pay-For-Call: Delivers qualified calls from consumers to businesses.
- Marchex Connect: Private-label local online advertising solution for companies with sales forces selling advertising to local businesses.
- OpenList: Local Business Search Engine

Marchex's competitors in the call-based advertising space include Yext and Yodle.