Yes, both Travis CI and GitLab offer a Free Trial.
Travis CI is designed for Large Enterprises, Medium Business and Small Business.
GitLab is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Travis CI Starts at $69/Month whereas for GitLab Starts at $19/User/Month.
Some top alternatives to Travis CI includes Codeship, Semaphore, GitLab, CircleCI, Bamboo, Buildkite, CloudBees Core, AppVeyor and GitlabRunner.
Some top alternatives to GitLab includes Codeship, Semaphore, CircleCI, Bamboo, AutoRABIT CI, Buildkite, CloudBees Core, Travis CI and Bitbucket.