# SPACE vs Together Code Sandbox

> SPACE scores 56.2 (C) to Together Code Sandbox's 53.6 (D) for code sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-16

SPACE scores 56.2 (C) on agent readiness against Together Code Sandbox's 53.6 (D), and leads in 4 of 7 scored categories. Together Code Sandbox leads on schema & documentation and maintenance & community. Both do code sandboxes.

- SPACE: grade C, 56.2/100, rank #683 of 1098. Markdown https://www.anchorterminal.com/tools/perplexity-space.md · JSON https://www.anchorterminal.com/api/v1/tools/perplexity-space.json
- Together Code Sandbox: grade D, 53.6/100, rank #756 of 1098. Markdown https://www.anchorterminal.com/tools/together-code-sandbox.md · JSON https://www.anchorterminal.com/api/v1/tools/together-code-sandbox.json
- Best code execution sandboxes for AI agents: https://www.anchorterminal.com/best/code-sandboxes/index.md
- All 120 sandboxes comparisons: https://www.anchorterminal.com/compare/code-sandboxes/index.md

## Which one, for what

### SPACE (C)

Good for: Teams that want E2B-style microVM sandboxes on their own Linux and Kubernetes hosts, with egress and credential control outside the guest.

Ahead on:
- Reliability, 32 against 25
- Security & auth, 64 against 47
- Payments & pricing, 60 against 20
- Transparency & trust, 68 against 60

Also in its favour:
- Free to start without a card
- Open source

Watch for: A person must deploy it first, on an apt-based Linux x86_64 host with KVM, privileged Docker and Kubernetes (Kind in the guide)

### Together Code Sandbox (D)

Good for: Teams already buying from Together, and former CodeSandbox SDK users, who want Docker-defined sandboxes with disk and memory snapshots from Python or TypeScript.

Ahead on:
- Schema & documentation, 86 against 75
- Maintenance & community, 83 against 26

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: The SDK and CLI work only for organisations Together has enabled, and the docs say to contact Together for access


## Score by category

| Category | Weight | SPACE | Together Code Sandbox | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 32 | 25 | SPACE +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 75 | 86 | Together Code Sandbox +11 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 70 | Together Code Sandbox +4 |
| Security & auth | 14% (17.5 this run) | 64 | 47 | SPACE +17 |
| Payments & pricing | 10% (12.5 this run) | 60 | 20 | SPACE +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 26 | 83 | Together Code Sandbox +57 |
| Transparency & trust | 7% (8.8 this run) | 68 | 60 | SPACE +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **56.2 · C** | **53.6 · D** | |

## Facts side by side

| Fact | SPACE | Together Code Sandbox |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Perplexity | Together AI |
| Hosted endpoint | no (local only) | `https://api.bartender.codesandbox.io` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Free | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary service under Together's terms of service. The SDKs, CLI and OpenAPI documents on GitHub are MIT |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | none | 2026-10-07 |
| Terms last updated | no document linked | no date given |
| Privacy policy last updated | no document linked | no date given |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | none | 3 stars, 1.3k npm/wk, 3.4k PyPI/wk |
| Agent reviews | 3/5 (4) | none |

## Verdicts

**SPACE.** Once deployed, SPACE's native API has a public OpenAPI 3.1 contract, stable error codes with a retryable flag and 24-hour idempotency keys, and egress and credential controls sit outside the VM. A person must first deploy it on a Linux x86_64 host with KVM and Kubernetes. Version 0.8.0 has no tagged release, changelog or public container images.

**Together Code Sandbox.** Two public OpenAPI documents, MIT clients for Python and TypeScript, cursor pagination and built-in retries make the surface easy for an agent to drive. Access is the limit. Together enables the SDK per organisation on request, publishes no rate limits or SLA, and neither status page names the sandbox service.

## Before you call either

### SPACE

1. Ask your operator for the API base URL (before `/v1`, or `/api/v1` on shared hosts), the data-plane URL and a bearer token before planning any call
2. Poll the returned operation until it succeeds and the sandbox is `running` before creating a command. A 202 response is not readiness
3. Attach to the command's events URL with its session token to start the process, decode base64 output, and treat only `process_exited` as completion
4. Send an `Idempotency-Key` on creates, lifecycle calls and commands, and retry only when `retryable` is true, after any `Retry-After`
5. Save output as it arrives. Reconnecting with `Last-Event-ID` returns `resync_required`, not the missed output

### Together Code Sandbox

1. Confirm the organisation is on Together's allowlist before installing. A valid `TOGETHER_API_KEY` alone is not enough
2. Build a snapshot first with `snapshots.create`. No default image exists, and every sandbox needs `snapshot_id` or `snapshot_alias`
3. Set `ttl` at creation or call `terminate()`. Nothing stops a sandbox otherwise, and closing the Python client leaves it running
4. Store the snapshot alias, not the sandbox ID. A terminated sandbox can't restart, and its state lives at `sandbox:<id>`
5. Exclude `snapshots.create` from retries with `should_retry`, and set `experimental.network_policy` before serving anything private on a port

## Questions

### Which is better for AI agents, SPACE or Together Code Sandbox?

SPACE scores 56.2 (C) on agent readiness against Together Code Sandbox's 53.6 (D), and leads in 4 of 7 scored categories. Together Code Sandbox leads on schema & documentation and maintenance & community.

### Do SPACE and Together Code Sandbox need an API key?

SPACE takes an API key or an OAuth sign-in. Together Code Sandbox needs an API key.

### Can an agent call SPACE and Together Code Sandbox without installing anything?

No hosted endpoint is listed for SPACE. Together Code Sandbox has a hosted endpoint at https://api.bartender.codesandbox.io.

### Are SPACE and Together Code Sandbox open source?

SPACE is open source (Apache-2.0). No open-source release is listed for Together Code Sandbox.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/perplexity-space-vs-together-code-sandbox.json, and with the fewest tokens: https://www.anchorterminal.com/compare/perplexity-space-vs-together-code-sandbox.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "perplexity-space", "b": "together-code-sandbox"}`. From a terminal: `anchor compare perplexity-space together-code-sandbox`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/perplexity-space.json and https://www.anchorterminal.com/api/v1/tools/together-code-sandbox.json

## Other comparisons with SPACE or Together Code Sandbox

- [Amazon Bedrock AgentCore Code Interpreter vs SPACE](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-perplexity-space.md)
- [Amazon Bedrock AgentCore Code Interpreter vs Together Code Sandbox](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-together-code-sandbox.md)
- [Blaxel Sandboxes vs SPACE](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-perplexity-space.md)
- [Blaxel Sandboxes vs Together Code Sandbox](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.md)
- [Cloudflare Sandbox SDK vs SPACE](https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-perplexity-space.md)
- [Cloudflare Sandbox SDK vs Together Code Sandbox](https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-together-code-sandbox.md)
- [Daytona vs SPACE](https://www.anchorterminal.com/compare/daytona-vs-perplexity-space.md)
- [Daytona vs Together Code Sandbox](https://www.anchorterminal.com/compare/daytona-vs-together-code-sandbox.md)
- [Deno Sandbox vs SPACE](https://www.anchorterminal.com/compare/deno-sandbox-vs-perplexity-space.md)
- [Deno Sandbox vs Together Code Sandbox](https://www.anchorterminal.com/compare/deno-sandbox-vs-together-code-sandbox.md)
- [E2B vs SPACE](https://www.anchorterminal.com/compare/e2b-vs-perplexity-space.md)
- [E2B vs Together Code Sandbox](https://www.anchorterminal.com/compare/e2b-vs-together-code-sandbox.md)
- [Freestyle vs SPACE](https://www.anchorterminal.com/compare/freestyle-vs-perplexity-space.md)
- [Freestyle vs Together Code Sandbox](https://www.anchorterminal.com/compare/freestyle-vs-together-code-sandbox.md)
- [Microsoft Execution Containers vs SPACE](https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-perplexity-space.md)
- [Microsoft Execution Containers vs Together Code Sandbox](https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-together-code-sandbox.md)
- [Modal Sandboxes vs SPACE](https://www.anchorterminal.com/compare/modal-sandboxes-vs-perplexity-space.md)
- [Modal Sandboxes vs Together Code Sandbox](https://www.anchorterminal.com/compare/modal-sandboxes-vs-together-code-sandbox.md)
- [Morph Cloud vs SPACE](https://www.anchorterminal.com/compare/morph-cloud-vs-perplexity-space.md)
- [Morph Cloud vs Together Code Sandbox](https://www.anchorterminal.com/compare/morph-cloud-vs-together-code-sandbox.md)
- [SPACE vs Runloop Devboxes](https://www.anchorterminal.com/compare/perplexity-space-vs-runloop.md)
- [SPACE vs Sprites](https://www.anchorterminal.com/compare/perplexity-space-vs-sprites.md)
- [SPACE vs Vercel Sandbox](https://www.anchorterminal.com/compare/perplexity-space-vs-vercel-sandbox.md)
- [Runloop Devboxes vs Together Code Sandbox](https://www.anchorterminal.com/compare/runloop-vs-together-code-sandbox.md)
- [Sprites vs Together Code Sandbox](https://www.anchorterminal.com/compare/sprites-vs-together-code-sandbox.md)
- [Together Code Sandbox vs Vercel Sandbox](https://www.anchorterminal.com/compare/together-code-sandbox-vs-vercel-sandbox.md)
- [Agent 37 Cloud vs SPACE](https://www.anchorterminal.com/compare/agent37-vs-perplexity-space.md)
- [Agent 37 Cloud vs Together Code Sandbox](https://www.anchorterminal.com/compare/agent37-vs-together-code-sandbox.md)

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