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Offrun vs Castov

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Offrun compared with Castov
DetailOffrun logo OffrunCastov logo Castov
What it doesRun Claude Code, Codex, Antigravity, Grok Build and Muse Code in parallel on your Mac with git worktrees and peer review Fast, 100% client-side developer platform with zero-data logging
StageNot given Not given
FoundedNot given Not given
Based inUS Not given
Pricing modelFree Free
PricingFree. Every feature, no seats to count, no card. Unlimited agents and projects, unlimited on-device dictation, up to 100 on-device schedules, unlimited connected coding agent accounts. All tools are free with no usage limits. The site may show ads in the future to cover running costs.
Key features
  • Peer review by a second agent before accepting changes
  • Multiple account support and automatic usage limit handling
  • Integrated preview browser and diff viewer
  • Support for Claude Code, Codex, Antigravity, Grok Build and Muse Code
  • Multi-timezone support with IANA database and daylight saving time
  • JSON to TypeScript conversion
  • JWT decoder and inspection
  • Cron expression parser and generator
  • End-to-end encrypted environment variable vaults
  • P2P multiplayer canvas with WebRTC and CRDT
  • Steganography for hiding encrypted secrets in images
  • Service Worker API mocker for frontend testing
  • Encrypted URL shares with hash fragment storage
What makes it different
  • All computation and data stays on your Mac; no server involvement in processing your code or handling your API keys
  • Completely free with no seat counting or subscription required
  • Use multiple accounts per agent to work around usage limits without losing context
  • Zero-data logging: no keystroke sent to external servers, all processing in browser memory
  • 100% client-side operation works entirely offline
  • Unified ecosystem across web, CLI, and AI agents via MCP Server
  • Sub-millisecond performance with local execution
  • Tool chaining and piping for seamless multi-stage workflows
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)22 no change since last check1 +1 (up) since last check
Trust Flow (Majestic)51
Citation Flow (Majestic)3219
Referring domains (Majestic)2227

5 details filled in for both companies.

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