Brooklinen
Yes, both Parabola and CircleCI offer a Free Trial.
Parabola is designed for Medium Business and Small Business.
CircleCI is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Parabola Starts at $80/month whereas for CircleCI Starts at $39/Month.
Some top alternatives to Parabola includes CircleCI, Etlworks Integrator, Matillion ETL, Fivetran, ETL Framework, Datagaps ETL Validator, Etleap, Optimus Mine, ETLrobot and Alloy Automation.
Some top alternatives to CircleCI includes Codeship, Semaphore, GitLab, Bamboo, AutoRABIT CI, Buildkite, CloudBees Core, Travis CI, AppVeyor and Bitbucket.