How long does integrating systems together take? — answered by Engineer Saeed Baatiah
Connecting two modern systems that each expose a documented API takes two days to two weeks. Connecting to a legacy system with no API can take a month or more, because the data has to be extracted through workarounds. The question that determines the timeline before anything else: does the existing system provide an API? Ask its vendor that exact question before requesting an integration quote, because the answer doubles or halves the estimate.