OpenSandbox vs hindsight

OpenSandbox and hindsight share 12 technologies: FastAPI, Postgres, uvicorn, React, Rich, cryptography, Pydantic, opentelemetry-api, OpenTelemetry, opentelemetry-exporter-otlp-proto-http, pyjwt, and MCP. OpenSandbox is written in Go and hindsight in Python.

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What they share and what sets them apart

opensandbox-group

OpenSandbox

Secure, Fast, and Extensible Sandbox runtime for AI agents.

Go16.5kRead on November 7, 2026, at commit a0e6e93What is OpenSandbox built with?

Only in OpenSandbox

In common

Only in hindsight

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
OpenSandbox650,138 lines written1,423 code files
hindsight749,226 lines written1,156 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
OpenSandbox12.8% of its commits signed by AIWith Claude Code, Codex, Cursor, GitHub Copilot, Devin, and Gemini CLI
hindsight6.8% of its commits signed by AIWith Claude Code, Cursor, Codex, and GitHub Copilot
ActivityFrom GitHub and its history, on the day SeeRepo read it.
OpenSandboxLast push November 7, 20263,370 commits16,493 stars
hindsightLast push November 5, 20264,037 commits58,979 stars
TestsThe files that test the code, and the share of code files a test imports.
OpenSandbox952 test files50.2% of its code files have a test that imports them
hindsight1,333 test files30.2% of its code files have a test that imports them

Frequently asked questions

Which is bigger, OpenSandbox or hindsight?
hindsight, with 749,226 lines written; OpenSandbox has 650,138.

The proof: vectorize-io/hindsight's code at commit ee3bd04

Which has more GitHub stars, OpenSandbox or hindsight?
hindsight, with 58,979 stars; OpenSandbox has 16,493.

The proof: vectorize-io/hindsight on GitHub

Which has more tests, OpenSandbox or hindsight?
hindsight, with 1,333 test files; OpenSandbox has 952.

The proof: vectorize-io/hindsight's code at commit ee3bd04

Which was updated more recently, OpenSandbox or hindsight?
OpenSandbox: its last push was on November 7, 2026, and hindsight's on November 5, 2026.

The proof: opensandbox-group/OpenSandbox's commits on GitHub

Which has more commits signed by AI, OpenSandbox or hindsight?
OpenSandbox: an AI signed 12.8% of its commits, with Claude Code, Codex, Cursor, GitHub Copilot, Devin, and Gemini CLI; in hindsight, 6.8%.

The proof: the commits each tool signed in opensandbox-group/OpenSandbox

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