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Godwit Sync is a command-line tool for migrating and continuously syncing data between S3-compatible object stores and local filesystems, in three directions: filesystem-to-S3, S3-to-filesystem, and S3-to-S3. Before any transfer it builds an editable SQLite plan listing the exact objects and byte counts that will move; run it with --plan-only to inspect or edit the plan first. Incremental runs move only objects whose size, ETag, or mtime changed since the last completed run. A killed run re-plans pending and failed objects instead of skipping them. Every run is verifiable: real per-object MD5 checksums (not just ETags), on-demand checksum verification with plan verify, a status REST endpoint, Prometheus metrics, and automation-friendly exit codes for cron and CI. Transfers are parallel with multipart uploads and partial-upload recovery, resumable from the exact checkpoint after a crash, rate-limited on reads and writes, and true stream-to-stream (object data is never staged or cached on local disk). Migrations are version-aware, moving every object version rather than only the latest, and object metadata and tags are preserved exactly as stored at the source. Godwit Sync works with any S3-compatible endpoint on both sides, including AWS S3, MinIO, Cloudflare R2, Backblaze B2, Wasabi, and DigitalOcean Spaces, plus self-hosted storage such as RustFS, Garage, SeaweedFS, versitygw, and QNAP QuObjects. It is compatible with immutable Object Lock (WORM) target buckets. The license is validated locally and offline, and data moves directly between source and destination without passing through Godwit Sync servers. Available for Linux, macOS, Windows, and FreeBSD, plus official Docker images.
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Godwit's answer:
DevOps, SREs, sysadmins, and technical self-hosters who run S3-compatible object storage and need predictable, verifiable migration and ongoing sync (backup, DR, replication) from the command line.
Godwit's answer:
Plan-first and proof-driven: it shows you exactly what will move before it moves, then proves every run finished with per-object MD5 checksums, metrics, and an on-demand plan verify. Re-runs are incremental: only changed objects transfer, planned from a local baseline with zero destination calls.
Godwit's answer:
Named after the bird with the longest non-stop migration on Earth. Godwit Sync was built out of frustration with sync tools that report success without proof: to turn risky migrations and fragile cron jobs into planned, observable runs.
Godwit's answer:
Tools like rclone move data but can't prove a scheduled run actually finished; Godwit proves it (status endpoint, metrics, exit codes, checksum verification). And unlike restic/Borg, it keeps your data as native objects in your own bucket: directly usable, with immutability via bucket Object Lock.
Godwit's answer:
Go, minio-go (any S3-compatible endpoint), SQLite, Cobra, Bubble Tea, and Prometheus: on a hexagonal architecture.
AWS Amplify - JavaScript library for app development using cloud services
Rclone - rsync for cloud storage.
aws-cli - Universal Command Line Interface for Amazon Web Services
Restic - Easy: Doing backups should be a frictionless process, otherwise you are tempted to skip it.
AWS Shell - An integrated shell for working with the AWS CLI. Contribute to awslabs/aws-shell development by creating an account on GitHub.
awless - A mighty command line interface for Amazon Web Services