We created Probo to solve a big issue we had with our software process: we needed to be able to test, verify, and approve development tasks as they were happening, rather than just at the end of a development sprint. Spinning up a sandbox site, or preview build, each time someone made a Pull Request in git transformed how we work as a team, as well as with our clients and partners.
Whereas in the past we tested all changes to a site in a single QA or Test environment, now every individual pull request is tested inside its own isolated sandbox. Probo gives you a shareable link where you can see the changes, run your automated and manual tests, and get approvals, all before they code changes are merged into a master (or even a dev) branch. This enables non-technical individuals like project managers, clients, marketing teams, and other stakeholders to get involved from the very beginning, and speeds up the feedback process.
While we do wish that every development team used Probo to build their sandbox or preview environments, we are excited to see many other platforms offer similar features, albeit normally in more limiting ways. Some of these tools are tied to a specific hosting platform, so they mainly useful if you have standardized on that platform, others work only with specific technologies and languages. Each solution varies in pricing structure and most use different measurements to determine your cost (disk space, concurrent builds, concurrent sandbox/previews, enterprise license, etc) so how do you know which tool will yield the best results for you?