CAPE Sandbox vs E2B

CAPE Sandbox is a free, open-source malware sandbox that executes malicious files in isolation while recording behavior and forensic artifacts. It captures API-hook activity, file changes, network traffic as PCAP, desktop screenshots, and full memory dumps. Malware classification can use YARA scans of unpacked payloads, Suricata scans of network captures, and behavioral signatures from API-hook output. CAPE also performs dynamic unpacking and extracts malware configuration through static and dynamic analysis. Its programmable debugger supports custom unpacking and configuration extractors, anti-sandbox countermeasures, and instruction traces. Configuration parsing works with CAPE’s framework and the listed RATDecoders, DC3-MWCP, MalDuck, and MaCo projects. Documentation covers a REST API, distributed deployment, and endpoints for tasks, reports, files, PCAPs, and machines. Additional integrations include Box-js, Curtain, LibreNMS, and Suricata. The project recommends Ubuntu 24.04 LTS, Windows 10 or Windows 11 23H2 targets, and KVM. Active unpacking is off by default because it may affect detonation quality.

E2B provides isolated Linux machines for AI agent sessions, with infrastructure managed by E2B or deployed in a customer’s cloud. Each session runs in its own Firecracker microVM and kernel, without sharing filesystem or memory with another customer’s sandboxes. An API covers execution, networking, storage, secrets, observability, and lifecycle management. The Code Interpreter SDK runs Python or JavaScript and can return charts, tables, and images; Desktop supplies screen, mouse, keyboard, and live streaming for computer-use agents. Listed integrations include CrewAI, Agno, Mastra, OpenAI Agents SDK, Google ADK, LangChain Deep Agents, and Vercel AI SDK. E2B Cloud is available in US, EU, and APAC regions. Enterprise BYOC can place sandboxes in a customer’s AWS, Google Cloud, or Azure account. The runtime is Apache-2.0 licensed and self-hostable. Hobby is free, with a one-time $100 usage credit, sessions up to one hour, and 20 concurrent sandboxes. Pro costs $150 a month plus usage costs.