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Superserve

Open-source Firecracker microVM sandboxes for long-running agents — pause indefinitely, resume instantly, fork in parallel

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freemiumStart free, no credit card. Per-second billing on every resource: compute $0.0504/vCPU-hour, memory $0.0162/GiB-hour, storage $0.000108/GiB-hour (paused sandboxes are billed for storage only). Up to $50k in credits available for early-stage startups. Enterprise pricing for on-premise deployment and dedicated support is by contact. Also self-hostable for free as open source.View full pricing →

Visit Superserve

https://www.superserve.ai

About Superserve

Superserve is an open-source sandbox built specifically for long-running AI agents, using durable Firecracker microVMs that can pause indefinitely and resume instantly. That addresses the constraint most agent sandboxes hit: a 24-hour session ceiling and no way to keep state across a pause. A Superserve sandbox has no such limit, and paused sandboxes bill only for storage, so an agent can sit idle for days and pick up exactly where it left off. Three usage patterns are supported. You can run the agent itself inside the sandbox with full access to files, packages, bash, and working state. You can keep your harness outside and spin up sandboxes purely for tool calls, isolating AI-generated code, browsers, and system tasks. Or you can fork a workspace, run parallel agents in isolated sandboxes, and pick the best result — snapshotting the VM at any step, branching into many environments, and resuming from a previous state. Security is the differentiator against container-based alternatives: every agent and tool call gets its own microVM with no shared kernel or cross-tenant state, a credentials broker sits between the agent and the APIs it calls so the agent never holds credentials directly, and egress is restricted to specified URLs and IPs with every outbound connection logged. It is SOC 2 Type 2, HIPAA, and GDPR aligned, self-hostable, and ships an SDK with streaming execution, a durable filesystem, elastic CPU and memory requests from inside the box, public preview URLs, native Docker support, and MCP connectivity.

Key Features

Indefinite sessions with no 24-hour limit
Snapshot, fork, and resume durable VM state
Firecracker microVM isolation per agent and per tool call
Credentials broker so agents never hold API keys
Egress network controls with full connection logging
Open source and self-hostable
SDK with streaming output, durable filesystem, and elastic CPU/memory requests
Public preview URLs, native Docker support, and MCP connectivity

Superserve Pros & Cons

Pros

  • +Removes the session-length ceiling that breaks long-running agents
  • +Stronger isolation than containers or local git worktrees
  • +Credentials broker meaningfully reduces exfiltration risk
  • +Open source, so self-hosting is a real escape hatch

⚠️ Cons

  • Per-second resource billing is harder to forecast than a flat plan
  • Firecracker self-hosting is non-trivial operational work
  • Compliance certifications matter mostly to larger buyers, not solo devs
  • Still a young project relative to established container platforms

Who Is Superserve Best For?

👤Teams running agents that work for hours or days, not minutes
👤Multi-agent systems that fork and compare parallel explorations
👤Anyone executing untrusted AI-generated code who needs VM-grade isolation

Tags

agent sandboxfirecrackermicrovmopen sourceself-hostedmcpcode execution
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