Render Removes AI Sandbox Time Limit, Offers Indefinite Runtime and State Preservation

Indefinite AI Sandbox Runtimes

Render announced the removal of its 30-day continuous runtime limit for AI sandboxes on paid workspace plans. This change allows sandboxes to operate indefinitely, suspending when idle and resuming with their files, memory, and running processes preserved. This capability is designed to support long-running AI agent workflows and development tasks.

Comparison with Vercel's Approach

In contrast to Render, Vercel currently imposes a 24-hour cap on individual sandbox sessions. While Vercel's persistent sandboxes can restart, their running processes begin anew. Render's approach allows agents to pick up mid-task without rebuilding their state, which is beneficial for multi-day codebase migrations or extensive application testing by agents.

New Features for AI Agents

Render is introducing new tools alongside the extended sandbox capabilities, including durable workflows and shared storage. These features are intended to integrate with applications and databases that AI agents depend on. Additionally, credential brokering is being rolled out, which attaches credentials to outbound requests from the sandbox, preventing secrets from entering the sandbox environment directly.

Feature Availability and Future Plans

Some features are in phased rollout or development. Credential brokering is initially available to selected customers. Private networking for sandboxes is still under development, and Render is addressing how its shared storage will manage simultaneous writes to the same file. The company views credential brokering as a rapidly becoming standard feature rather than a competitive differentiator.