OrcaReplay is an open-source record-and-replay engine that allows developers to capture, debug, and fork AI agent executions.
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It operates as a local proxy to record model calls, shell commands, and filesystem changes, enabling users to reproduce agent behavior byte-for-byte or test different models from any execution step.
- 01
Deterministic offline replay with egress blocked
- 02
Cross-model forking from any execution checkpoint
- 03
Capture of shell operations, file changes, and MCP traffic
- 04
No-patch integration via environment variables and local proxy
- 05
Causal graph visualization of agent decisions
Open Source
OrcaReplay is free and open-source (Apache-2.0). It does not have paid tiers; however, live model comparisons and forks initiated via the tool may incur standard API usage costs from the AI providers.
Best for
Debugging complex, multi-step AI agent workflows and performing fair model comparisons on identical execution paths.
Not ideal for
Sandboxing untrusted code, as the tool executes recorded tool calls for real, or capturing interactive terminal sessions where user input is not captured on the wire.
OrcaReplay is a powerful, developer-focused observability tool that provides time-travel debugging for AI agents, effectively bridging the gap between high-level logs and granular machine behavior.
Launched on September 1, 2026, the tool introduced ongoing support for major coding agents including Claude Code, Codex, and Hermes, along with TLS interception capabilities for opaque API traffic.
As of
Is OrcaReplay free?+
Yes - OrcaReplay is Open Source. OrcaReplay is free and open-source (Apache-2.0). It does not have paid tiers; however, live model comparisons and forks initiated via the tool may incur standard API usage costs from the AI providers.
Is OrcaReplay open source?+
Yes - OrcaReplay is open source. OrcaReplay is free and open-source (Apache-2.0). It does not have paid tiers; however, live model comparisons and forks initiated via the tool may incur standard API usage costs from the AI providers.
Who is OrcaReplay best for?+
Debugging complex, multi-step AI agent workflows and performing fair model comparisons on identical execution paths.
Who is OrcaReplay not ideal for?+
Sandboxing untrusted code, as the tool executes recorded tool calls for real, or capturing interactive terminal sessions where user input is not captured on the wire.
What are the best OrcaReplay alternatives?+
The closest OrcaReplay alternatives on ai.dosa.dev are Pieces for Developers, agenttrace, Vibe Kanban - all listed under Developer Productivity & Workflow.
Who makes OrcaReplay?+
OrcaReplay is developed by Continuum AI. It is listed in the Developer Productivity & Workflow category on ai.dosa.dev.
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