Opbox
Opbox is an experimental daemon that syncs a directory of plain text files between machines in real time. It works at the filesystem level (so you keep your own editor) and merges concurrent edits with CRDTs instead of conflict copies. Syncs end-to-end encrypted through a shared log on s2.dev, or self-host with s2-lite.
β Pros / Advantages
- β’ CRDT-based conflict-free merging
- β’ Local-first, filesystem-level operation
- β’ End-to-end encrypted sync via S2 (or self-host)
- β’ Editor-agnostic with autosave awareness
- β’ Text-files-only, by design
β Cons / Limitations
π° Pricing Plans
Free
Pricing details are gathered from public sources and are subject to change. Please visit the official website for real-time rates.
Last updated: July 2026 Β· 9bests editorial review
β Who should use Opbox
- β’ CRDT-based conflict-free merging
- β’ Local-first, filesystem-level operation
- β’ End-to-end encrypted sync via S2 (or self-host)
- β’ Editor-agnostic with autosave awareness
- β’ Text-files-only, by design
β οΈ Who should look elsewhere
π― Common use cases
Meeting summaries and notes
Inbox and task automation
Workflow orchestration
βοΈ Opbox vs Otter.ai
| Opbox | Otter.ai | |
|---|---|---|
| Rating | 3.5/5 | 4.4/5 |
| Pricing | Free | Free / $16.99/mo |
| Key strength | CRDT-based conflict-free merging | Real-time transcription |
See the full head-to-head in our Opbox vs Otter.ai comparison.
β Frequently asked questions
Is Opbox free?
+
Opbox offers a free tier (Free). Paid plans unlock higher limits and advanced features.
What is Opbox best for?
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Opbox is best for CRDT-based conflict-free merging and Local-first, filesystem-level operation. Opbox is an experimental daemon that syncs a directory of plain text files between machines in real time. It works at the filesystem level (so you keep your own editor) and merges concurrent edits with CRDTs instead of conflict copies. Syncs end-to-end encrypted through a shared log on s2.dev, or self-host with s2-lite.
How does Opbox compare to Otter.ai?
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Opbox (3.5/5) and Otter.ai (4.4/5) serve overlapping needs. Opbox stands out for CRDT-based conflict-free merging, while Otter.ai is stronger at Real-time transcription. Choose based on your priority.
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