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Unlike expensive SaaS tools ($8-48/mo), CalBridge is open-source and self-hostable for as low as ~$5/mo on a VPS or totally free if you run it on your machine.
Key differences: granular copy controls (choose exactly what syncs), smart filtering by keyword or color before sync happens, true two-way sync with loop prevention, and bounded backfill control. Deploy in one click on Railway.

CalBridge: Two way calendar sync toolSelf hosted two-way Google Calendar sync tool
