TeamCity's Professional On-prem tier is free forever, including for commercial use, and ships with 3 build agents, 100 build configurations, and all Enterprise features. The primary constraint G2 reviewers flag is the 100-configuration cap, which becomes limiting at scale. TeamCity's Enterprise On-prem tier, starting at $2,399, removes that cap entirely, adds unlimited build configurations, priority support, and a 50% renewal discount, with additional agents at $359/month. TeamCity's Cloud tier starts at $45/month and eliminates infrastructure management overhead. Open-source projects and qualifying startups can access discounted or free licensing by contacting the vendor.