Source: https://seerepo.com/compare/opensandbox-group/OpenSandbox/vs/vectorize-io/hindsight
Markdown source: https://seerepo.com/compare/opensandbox-group/OpenSandbox/vs/vectorize-io/hindsight.md
Description: 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.

# 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.

- [opensandbox-group/OpenSandbox](https://seerepo.com/r/opensandbox-group/OpenSandbox): Secure, Fast, and Extensible Sandbox runtime for AI agents.
- [vectorize-io/hindsight](https://seerepo.com/r/vectorize-io/hindsight): Hindsight: Agent Memory That Learns

## What they share and what sets them apart

- In common: FastAPI, Postgres, uvicorn, React, Rich, cryptography, Pydantic, opentelemetry-api, OpenTelemetry, opentelemetry-exporter-otlp-proto-http, pyjwt, MCP
- Only in OpenSandbox: net/http, Gin, go-redis, psycopg, Redis, etcd, github.com/aliyun/aliyun-oss-go-sdk, MySQL, oss2, sigs.k8s.io/controller-runtime, starlette, Vite, react-router-dom, jedis, JetBrains, itsdangerous, github.com/go-playground/validator/v10, kubernetes, go.opentelemetry.io/otel/metric, docker, k8s.io/klog/v2, github.com/go-logr/logr, gopkg.in/natefinch/lumberjack.v2, containerd, org.slf4j:slf4j-api, go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp, go.opentelemetry.io/otel/sdk, go.opentelemetry.io/otel/sdk/metric, go.uber.org/zap, go.opentelemetry.io/otel/trace, io.opentelemetry:opentelemetry-api, Knative, opentelemetry-sdk, Prometheus, antd, xterm, Ant Design, Microsoft.Extensions.Logging.Abstractions, ch.qos.logback:logback-classic
- Only in hindsight: pgvector, psycopg2-binary, Claude, Google, OpenAI, AIOHTTP, fastmcp, Tokio, Next.js, Preact, crossterm, indicatif, Ratatui, SQLAlchemy, alembic, einops, Haystack, openai-agents, pydantic-ai-slim, strands-agents, litellm, torch, CrewAI, google-adk, LangChain, llama-index-core, autogen-core, pillow, validator.v2, opentelemetry-semantic-conventions, opentelemetry-instrumentation-fastapi, Tailwind CSS, class-variance-authority, @tailwindcss/postcss, PostCSS, next-themes, tailwind-merge, sonner, Radix UI, react18-json-view, recharts, cmdk, Lucide, react-markdown, remark-gfm, ai, Zod, @opencode-ai/plugin, js-yaml, @clack/prompts

## Side by side

| | OpenSandbox | hindsight |
|---|---|---|
| Size | 650,138 lines written, 1,423 code files | 749,226 lines written, 1,156 code files |
| Who writes it | 12.8% of its commits signed by AI. With Claude Code, Codex, Cursor, GitHub Copilot, Devin, and Gemini CLI | 6.8% of its commits signed by AI. With Claude Code, Cursor, Codex, and GitHub Copilot |
| Activity | Last push November 7, 2026, 3,370 commits, 16,493 stars | Last push November 5, 2026, 4,037 commits, 58,979 stars |
| Tests | 952 test files. 50.2% of its code files have a test that imports them | 1,333 test files. 30.2% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## 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](https://github.com/vectorize-io/hindsight/tree/ee3bd049ebe3b96b7d1120328429102100c1e28e)

### Which has more GitHub stars, OpenSandbox or hindsight?

hindsight, with 58,979 stars; OpenSandbox has 16,493.

The proof: [vectorize-io/hindsight on GitHub](https://github.com/vectorize-io/hindsight)

### 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](https://github.com/vectorize-io/hindsight/tree/ee3bd049ebe3b96b7d1120328429102100c1e28e)

### 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](https://github.com/opensandbox-group/OpenSandbox/commits)

### 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](https://seerepo.com/r/opensandbox-group/OpenSandbox/ai)

## Sources

- opensandbox-group/OpenSandbox: Read on November 7, 2026, at commit a0e6e93 (https://github.com/opensandbox-group/OpenSandbox/tree/a0e6e93e40c2a7aa8be4ffef7243e534338615e1)
- vectorize-io/hindsight: Read on November 5, 2026, at commit ee3bd04 (https://github.com/vectorize-io/hindsight/tree/ee3bd049ebe3b96b7d1120328429102100c1e28e)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.