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Daytona vs tethered

Sets up development environments, not runtime network restrictions.

Side by side

What it is
Daytona:Daytona is an open-source dev environment manager that creates secure, elastic sandboxes for code and AI agent execution.
tethered:tethered is a zero-dependency Python library that enforces outbound network allow-lists at runtime.
Best for
Daytona:Self-hosted sandbox environments
tethered:In-process network firewall for Python
Who it’s for
Daytona:Developers and teams needing isolated, reproducible environments for any infrastructure.
tethered:Python developers who need runtime network egress control, including AI-generated code and third-party libraries.
Pricing
Daytona:Open source
tethered:Open source
Open source
Daytona:Yes, 71,707 GitHub stars
tethered:Yes, 10 GitHub stars
Works with
Daytona:Python, TypeScript, Ruby, Go, Java
tethered:requests, httpx, aiohttp, Django, Flask, FastAPI
DevHunt upvotes
Daytona:339
tethered:1
Launched on DevHunt
Daytona:May 2024
tethered:Mar 2026

Daytona features

  • Sandboxes. Isolated full composable computers that spin up in under 90 ms and retain state.
  • Agent tools. Programmatic APIs and SDKs for code execution, filesystem ops, and lifecycle management.
  • Human tools. Dashboard, web terminal, SSH and VNC access for interactive sessions.
  • Platform controls. Governance, API keys, audit logs and OpenTelemetry for organizations.
  • System tools. Hooks, webhooks and network limits for custom lifecycle events.
  • Multi-language SDKs. Client libraries for Python, TypeScript, Ruby, Go and Java.

tethered features

  • Process-wide activation. Call activate() once to set a global allow-list for all outbound sockets.
  • Scoped tightening. Use scope() to apply tighter restrictions to specific code paths or libraries.
  • Zero external dependencies. Implements checks by hooking Python's native socket layer, no extra packages needed.
  • Works with common frameworks. Compatible with requests, httpx, aiohttp, Django, Flask, FastAPI, and any socket-based library.
  • Subprocess propagation. Automatically propagates policies to child processes via site-packages bootstrap.
  • Locked-mode integrity checks. Detects tampering of policy payloads and filesystem changes.
  • DNS divergence repair. Falls back to safe DNS resolution when standard lookup fails.
  • Simple API. One-line allow-list declaration blocks unauthorized network calls with EgressBlocked exceptions.

Based on each tool's website and DevHunt data. Details may change; check the official sites.