Sonic
Yes, both SwaggerHub and GitLab offer a Free Trial.
SwaggerHub is designed for Large Enterprises, Medium Business and Small Business.
GitLab is designed for Large Enterprises, Medium Business and Small Business.
Pricing for SwaggerHub Starts at $90/Month when Billed Yearly whereas for GitLab Starts at $19/User/Month.
Some top alternatives to SwaggerHub includes Apigee Edge, Postman, MuleSoft Anypoint Platform, WSO2 API Manager, RepreZen API Studio, Stoplight, APITree, Apitive Studio, Meta API and Dapi.
Some top alternatives to GitLab includes Codeship, Semaphore, CircleCI, Bamboo, AutoRABIT CI, Buildkite, CloudBees Core, Travis CI and Bitbucket.