X-ray search. Google indexes public LinkedIn, GitHub, and portfolio pages. site:linkedin.com/in "staff engineer" "kubernetes" "berlin" costs nothing and skips every platform limit.
GitHub sourcing. Search commits, stars, and language filters directly; a contributor graph is a better skills signal than any resume keyword.
Boolean on job boards' resume databases you already pay for through postings — most teams never touch them.
Community mining. Conference speaker lists, meetup attendees, Discord/Slack communities, and niche newsletters concentrate exactly the passive talent databases resell to you.
When the free stack stops scaling — usually when outreach volume or screening time becomes the bottleneck — that's the moment paid tools earn their keep. See the full 2026 rankings for where to spend first.