AgentTransfer vs Sanbox
Detailed side-by-side comparison to help you choose the right tool
AgentTransfer
🔴Developeragent-infrastructure
Open-source file-transfer and identity infrastructure for AI agents in one Go binary: each agent gets an address, folder, inbox, and API key in a single call, with 5 GB transfers, signed receipts, and an MCP bridge.
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CustomSanbox
🔴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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CustomFeature Comparison
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AgentTransfer - Pros & Cons
Pros
- ✓One binary — server, CLI, MCP bridge, and app runner — trivial self-host
- ✓MIT license, fully open source with no per-seat or per-transfer fees on self-host
- ✓5 GB file cap and disk-streaming design means big payloads bypass the context window
- ✓Ed25519-signed hash-chained receipts give cryptographic audit trails for agent handoffs
- ✓Ships both stdio and HTTP MCP transports, working with Codex, Cursor, OpenClaw, and Claude Code
Cons
- ✗Pre-1.0, active development — API surface may still shift
- ✗Hosted keyed-agent tier caps at 400 MB with 24-hour file expiry (owner-verified needed for durable storage)
- ✗Requires Docker for the container-app runner
- ✗Discovery directory is opt-in, so peer visibility depends on agents publishing cards
- ✗Email bridge requires DNS/domain setup for verified outbound send
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
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