Sandboxes and compute for agents: 10 companies ranked

Companies selling isolated machines where AI agents run code and tools, in SalesBook agentic-sector rank order. Every company has a profile with dated public sources and a live check of its agent interfaces (MCP, llms.txt). Ranks use the published SalesBook method; tell us who is missing.

Modal#1Cloud infrastructure for AI teams: GPU inference, training, serverless functions and isolated Sandboxes for coding agents and untrusted code.
MCP connector: nollms.txt: yes
Northflank#26Workload platform with microVM sandboxes for running untrusted and LLM-generated code, on its cloud or the customer's own cloud.
MCP connector: nollms.txt: no
E2B#27Open-source cloud sandboxes that give each AI agent an isolated machine to run code and tools, offered as a managed cloud or in the customer's own cloud.
MCP connector: yesllms.txt: yes
Daytona#38Sandbox infrastructure that gives AI agents fast, isolated computers to run generated code.
MCP connector: yesllms.txt: yes
Freestyle#44Full Linux VMs for AI agents and agent platforms, with fast start, memory-inclusive cloning, pause/resume and network controls.
MCP connector: nollms.txt: yes
Runloop#48Micro-VM Devboxes, agent management and evaluation for teams building AI coding agents, with deploy-to-VPC for enterprises.
MCP connector: nollms.txt: yes
Beam#60Open-source, self-hostable AI cloud with forkable microVMs, code sandboxes for agents, GPU inference and task queues.
MCP connector: nollms.txt: no
Fly.io#63Public cloud of hardware-isolated Linux VMs; its Sprites product gives AI agents persistent, checkpointable sandboxes billed by usage.
MCP connector: yesllms.txt: yes
Tensorlake#93Firecracker microVM sandboxes, versioned filesystem, hosted Git and orchestration for deploying AI agent harnesses, including BYOC.
MCP connector: nollms.txt: yes
Bunnyshell#122Ephemeral environments platform whose HopX product offers isolated Firecracker sandboxes for AI agents, scripts and jobs.
MCP connector: nollms.txt: yes