When you build a prospect list inside a typical cloud tool, the data lives on their servers, under their limits. Stop paying and the list can disappear. A local-first tool flips that relationship.
Where the data lives
Mapsucker stores every lead, review, and setting in a database on your own computer. There’s no vendor cloud in the middle to throttle, breach, or shut down — and no per-record fee, because you bring your own provider keys for optional AI features.
Where your keys live
API keys for enrichment or verification are encrypted by your operating system and never leave the device. You stay in control of what you spend and who sees it.
What that means in practice
You can scan without an account, keep working offline once data is collected, and export as often as you like. Ownership stops being a subscription tier and becomes the default.