Do you build greenfield web apps or also rebuild existing ones?

Both. Roughly 60 percent of our Laravel work is greenfield, where we take a fresh idea or specification and ship the first production version. The other 40 percent is replatform work, where we modernise legacy PHP or migrate from CodeIgniter, WordPress, or older Laravel versions. For replatform projects we maintain feature parity, run shadow testing, and cut over with zero data loss. More on our migration services page.