The CodeSandbox alternative that keeps your keys°
Looking for a CodeSandbox alternative? Here is the honest comparison for a builder who wants to own their agent — keys, code, and compute.
Where jurniti is different
- Always-on agent runtime with harness install, not a browser sandbox that sleeps with the tab.
- Firecracker per-tenant isolation for agents that hold production credentials.
- Flat monthly pricing for one agent box instead of IDE seat + resource tiers.
| jurniti | CodeSandbox | |
|---|---|---|
| Isolation | Per-tenant Firecracker microVM (KVM hardware boundary); 1 vCPU = 1 physical core. | Sandboxed cloud environments for development (browser IDE). Not marketed as a multi-tenant Firecracker agent host for OpenClaw/Claude Code fleets. |
| Pricing | Flat $25–$99/mo, no metered surprises. | Free tier for exploration; paid Pro/team plans for private repos, more resources, and collaboration (exact seat pricing re-verify on codesandbox.io/pricing before quoting a dollar figure in sales). Verified posture 2026-07-28: freemium cloud IDE, not flat agent hosting. |
| Model keys | BYOK inside your VM — model traffic never traverses jurniti. | Dev-environment posture: secrets and API keys are project/env configuration inside the sandbox IDE, not a managed agent BYOK SKU. |
Where CodeSandbox is strong
- Fast browser-based prototyping and shareable sandboxes.
- Strong fit for frontend demos, interviews, and collaborative editing.
- Lower friction for temporary environments than provisioning a full agent VM.
When to pick one — or both
Pick CodeSandbox when you need a browser IDE sandbox for app prototypes. Pick jurniti when you need a managed always-on agent with a real microVM boundary.
Pick jurniti when your agent holds production credentials, runs code an LLM returned, and you want a real per-tenant hardware boundary with your keys inside your VM — at a flat monthly price.
Run Claude Code on a real Firecracker microVM. Provision in ~3 minutes after payment. If it is not worth it within 30 days, email us and we refund you.
jurniti vs CodeSandbox — questions
Only if your real job is hosting an agent harness 24/7. For browser IDE sandboxes, CodeSandbox remains the category product.
See managed Claude Code on jurniti →
Read the guide →Related comparisons →
Competitor facts are sourced and re-verified (last checked 2026-07-28). CodeSandbox is a trademark of its owner, named here only for comparison.