How to Build an OSINT-Powered B2B Prospecting Workflow in 2026 (Without Getting Banned)

Last year I ran the same LinkedIn Sales Navigator export through three enrichment APIs. Apollo matched 61% of the emails. Hunter.io matched 54%. An OSINT-first pipeline I'd built in n8n — pulling from public sources before hitting any paid API — matched 79% and cost roughly $0.003 per contact. The delta wasn't magic. It was sequence. Security researchers have been building layered intelligence workflows for years. Sales teams mostly buy a database subscription and call it done. In 2026, that gap