Sanbox vs BoundFlow
Detailed side-by-side comparison to help you choose the right tool
Sanbox
🔴Developeragent-infrastructure
Sanbox by Sanlabs runs AI agents in isolated, resumable MicroVM sandboxes with persistent filesystems, live run events, network ACLs, and self-hosting options.
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CustomBoundFlow
🔴Developeragent-infrastructure
An open-source control plane for unattended LLM agents and workflows, enforcing cost caps, human approval gates, model-switching policies, and self-healing rollbacks around agents you build.
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Sanbox - Pros & Cons
Pros
- ✓Kernel-level MicroVM isolation is a real boundary, not shared-kernel containerization
- ✓Snapshots make agent runs pausable and resumable from the exact state — inspectable mid-run
- ✓EU data residency, on-prem, and VPC deployment options cover compliance-sensitive teams
- ✓Live structured event stream removes the need to poll for run status
- ✓Reusable run templates pin the approved image, model, limits, and egress policy in one place
Cons
- ✗Pricing is not published — access requires a signup and likely sales conversation
- ✗No MCP support currently — integration is CLI, template, and run-based only
- ✗Newer entrant; smaller ecosystem than E2B, Modal, or Daytona in adapters and community examples
- ✗Documentation on runner adapter contracts is thin outside the OpenCode reference
- ✗CLI-first workflow may feel heavier than one-line SDK calls for quick prototyping
BoundFlow - Pros & Cons
Pros
- ✓Guardrails as declarative policy — cost caps and model switches without touching agent code
- ✓Bring-your-own-key means the vendor never sees your provider credentials or token spend
- ✓Full self-host in one Go binary + Postgres; Apache-2.0 backend
- ✓OpenTelemetry-native, so runs show up in Langfuse/Phoenix/Jaeger without extra wiring
- ✓Approval gates + audit log make it viable for regulated/back-office use cases
Cons
- ✗Pre-1.0 public preview — expect breaking changes
- ✗Python SDK only (though LangChain adapter widens provider reach)
- ✗No MCP integration documented
- ✗Managed BoundFlow Cloud pricing not published
- ✗Requires Postgres and gRPC infrastructure — heavier setup than a hosted framework
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