Best Agent Sandboxes in 2026: Cold Start, Per-Second Pricing, and Network Policy Across E2B, Daytona, Modal, Cloudflare, and Vercel

A comparative analysis of agent sandboxes from E2B, Daytona, Modal, Cloudflare, and Vercel highlights significant variations in performance and billing models for AI-driven code execution. The study evaluates these providers based on cold start latency, normalized per-second pricing, and specific technical features like filesystem persistence and network policy management. This data helps developers identify the most cost-effective and efficient environments for running autonomous agents that require integrated code execution capabilities.