GitLab offers Free Trial, but Zepel does not.
GitLab is designed for Large Enterprises, Medium Business and Small Business.
Zepel is designed for Medium Business and Small Business.
Pricing for GitLab Starts at $19/User/Month whereas for Zepel Starts at $5/User/Month when Billed Yearly.
Some top alternatives to GitLab includes Codeship, Semaphore, CircleCI, Bamboo, AutoRABIT CI, Buildkite, CloudBees Core, Travis CI and Bitbucket.
Some top alternatives to Zepel includes ProdPad, ProductPlan, Jira, productboard, Productroad, Next Please, Trello, Asana, Teamwork and Height.