Where can I get the import export data with importers and exporters information free of cost?

actually importers and exporters information is confidential but some private companies are providing the information. I just want to know how are the

actually importers and exporters information is confidential but some private companies are providing the information. I just want to know how are they getting the information?

or:actually importers and exporters information is confidential but some private companies are providing the information. I just want to know how are they getting the information?

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