Self-hosted
What running it yourself gives you
Total control and no licence fee. Traccar is free and open source: you can put it on a small server, point your devices at it and pay nobody. You choose the version, the host, the retention, the integrations. Nothing on this page is an argument that you cannot do it — plenty of people do, and do it well.
What it costs instead is attention: the upgrades, the database as it grows, the backups and the restore you have never tested, and being the person who gets called when the map is empty on a Saturday.