Great data, the worst UX/UI out there

If you don't use Salesforce, Hubspot, or Salesloft, you would have to do a lot of things manually. For some reason, in my experience, they don't let you use their API to enrich data if you don't use one of the CRMs mentioned, which makes no sense. In my opinion, their UX/UI is likely the worst I've ever seen, somewhere very close to SalesForce. A lot of things don't make any sense and those that do, still work unexpectedly sometimes. Like if you decide to upload a list of companies, you would have to specify which countries they operate in (no idea why), however, if you do this using the interface, you don't have to specify the countries, lol. All they do to help with this is provide an Excel file with Macros that do some matching of countries to company name and websites and output a huge list that you'll have to break up into pieces, because 6sense won't let you upload more than 25k lines. I feel this is likely the main reason they don't let you use the product prior to signing the contract. In my opinion, it's a terrible experience.