Palantir sell consulting services ("forward deployed engineering") around graph and map database platforms, using data supplied by customers. Some of their customers ask them to make surveillance aggregation systems, others ask them to make totally banal and random enterprise software (this is why you commonly see freak-outs around hospitals buying "Palantir," for example; usually they are operating as consultants making some kind of medical records warehousing system owned by the customer).

Samdesk provide risk analytics using traditional risk analysis investigation and research, which they have now welded an "AI platform" to, like everyone does these days. They aggregate crime and protest data to make a map of "places your employees might be at risk" and sell it to companies.

Samdesk would be a Palantir _customer_ if they liked parting with their money, not a competitor; Palantir operate at a much "lower level" and don't do the data collection or research on their own.