Tangle vs Upstash Box: which sandbox for coding agents?
Pick Upstash Box for a persistent box with Claude Code, Codex, OpenCode or Cursor built in, git to pull request, a headless browser and cron schedules. Pick Tangle when your coding agent should need no model key of your own, when you want Pi, Kimi Code or Prime Agent, or when you run in Europe.
Last checked November 10, 2026: each Upstash Box fact links the page it came from, read that day.
Pick Upstash Box when
- You need the coding agent inside the box with a result API: Upstash Box runs Claude Code, Codex, OpenCode or Cursor in the box. (upstash.com/box)
- You need a finished task to arrive as a pull request: Box clones, branches, commits, pushes and opens the PR from the SDK. (upstash.com/box)
- You need to drive remote boxes from your own coding agent: Upstash has a remote MCP server. (upstash.com/box)
- You need a browser and schedules next to the agent: Box ships headless Chromium and cron schedules in the same box. (upstash.com/box)
Pick Tangle when
- You want Pi, Kimi Code or Prime Agent next to the agents you already use, installed in every sandbox. (tangle.tools)
- Your coding agent needs no model key: Tangle Router is the default, billed to your Tangle balance. (docs.tangle.tools/sandbox/cloud-agents)
- You run in Europe: Tangle runs sandboxes in eu1 as well as us1. (tangle.tools/benchmarks)
- A fleet runs many agents under one budget, set in dollars, and the platform refuses any charge past it. (docs.tangle.tools/sandbox/agents-fleet)
Upstash Box and Tangle, row by row
| Feature | Upstash Box | Tangle |
|---|---|---|
| Coding agents | Claude Code, Codex, OpenCode and Cursor are built in; you can also bring your own (upstash.com/box) | Claude Code, Codex, OpenCode, Pi, Hermes, OpenClaw, Kimi Code and Prime Agent installed in every sandbox (tangle.tools) |
| Model calls | You bring your own model provider key (upstash.com/box) | Tangle Router by default, billed to the same Tangle balance as the sandbox (docs.tangle.tools/sandbox/cloud-agents) |
| Isolation | Each box is its own container with a dedicated filesystem, process tree and network stack (upstash.com/box) | A container or a Firecracker microVM, chosen per sandbox (docs.tangle.tools/sandbox/security) |
| Stop and resume | Idle boxes pause with storage kept; running processes stop until the next request wakes the box (upstash.com/box) | Timers you set stop a sandbox; a stopped sandbox keeps its files until you delete it or its delete timer passes (docs.tangle.tools/sandbox/migrate-e2b) |
| Snapshots and forks | Snapshots of a ready environment, with new boxes started from them (upstash.com/box) | Snapshot, revert, and split a running sandbox into copies (docs.tangle.tools/sandbox/snapshots) |
| Desktop | A headless Chromium with live view and recordings (upstash.com/box) | A desktop the coding agent controls through a hosted computer-use endpoint (docs.tangle.tools/sandbox/agents-mcp) |
| MCP | A remote MCP server at mcp.upstash.com for creating and driving boxes (upstash.com/box) | A local stdio MCP server for one sandbox, plus the hosted computer-use endpoint (docs.tangle.tools/sandbox/agents-mcp) |
| Secrets | Attach Headers inject secret HTTP headers on outbound HTTPS requests so the secrets never enter the container (upstash.com/docs/box/overall/attach-headers.md) | Stored once; you choose whether the sandbox can read a secret or only the network proxy can (docs.tangle.tools/sandbox/secrets) |
| Network | Network policy limits outbound traffic to an allowlist (upstash.com/box) | Open, a strict allowlist, or blocked, changeable while the sandbox runs (docs.tangle.tools/sandbox/egress) |
| Getting a shell | A shell through the SDK or directly over SSH (upstash.com/docs/box/overall/shell.md) | SSH, a PTY or a browser terminal (docs.tangle.tools/sandbox/terminals) |
| Run records | Read-only API keys can read status, metrics, logs, schedules, previews and config (upstash.com/docs/box/overall/security.md) | Every agent turn is traced, and an Intelligence report summarizes what the agent did (docs.tangle.tools/sandbox/observability) |
| Regions | AWS us-east-1 today, with more regions planned (upstash.com/box) | eu1 and us1 (tangle.tools/benchmarks) |
| SDKs | TypeScript and Python SDKs, a CLI and the MCP server (upstash.com/box) | TypeScript, Python (tangle-sandbox on PyPI) and the tangle CLI (docs.tangle.tools/sandbox/sdk-python) |
| Free start | A free plan; no credit card required to start (upstash.com/box) | A Free plan with no included credit (tangle.tools#pricing) |
Start times: our measurements, their published claims
| Tangle, measured | p50 | p95 | Runs | Failed |
|---|---|---|---|---|
| New sandbox, ready to use | 1.5s | 12s | 393 | 56 of 425 |
| Create, then run a first command | 1.7s | 8s | 74 | 3 of 77 |
| Claude Code's first reply, from create | 3.4s | 12s | 45 | 3 of 48 |
| Codex's first reply, from create | 3.3s | 18s | 44 | 3 of 47 |
Production runs from 2026-11-02 to 2026-11-09, the same rows tangle.tools/benchmarks draws.
- Upstash states "Run your first agent in minutes". (upstash.com/box)
These are different tests, and we have not run Upstash Box through our benchmark.
Prices are on each pricing page
Tangle: plans and the rate card. Upstash Box: upstash.com/pricing/box.