Engineering Insights

Vercel Sandbox increases concurrency and port limits

Pro and Enterprise teams can now run up to 2,000 concurrently (up from 150), with each now able to expose up to 4 ports for external access. Vercel Sandboxes This enables larger traffic spikes for workloads like untrusted code execution, batch jobs, and automated testing, as well as more complex applications with multiple services or protocols running side-by-side. If you need a higher amount of concurrent sandboxes, you can to explore higher limits for your projects.contact our sales team Lea

Native support for SvelteKit's new OpenTelemetry spans

Vercel now directly integrates with 's new server-side OpenTelemetry spans.SvelteKit To get started, activate experimental tracing in SvelteKit: And create the tracing instrumentation file with the Vercel OpenTelemetry collector: Traces generated during will now include the built-in SvelteKit spans. You can also . See the for more information.tracing sessionsconfigure other collectorsSvelteKit observability docs Read more

If agents are building your app, who gets the W-2?

Autonomous coding agents are not the future. They are already . Agents can now design, build, test, and deploy an entire full-stack feature from front end to back end without a human touching the keyboard. here The reality is that while this technology has advanced quickly, Generally Accepted Accounting Principles (GAAP) have not traditionally focused on the cost of tools used in development. Under current U.S. GAAP, you can capitalize certain third-party software costs if they are a direct cost

WAF - WAF Release - 2025-08-18

This week's update This week, a series of critical vulnerabilities were discovered impacting core enterprise and open-source infrastructure. These flaws present a range of risks, providing attackers with distinct pathways for remote code execution, methods to breach internal network boundaries, and opportunities for critical data exposure and operational disruption. Key Findings SonicWall SMA (CVE-2025-32819, CVE-2025-32820, CVE-2025-32821): A remote authenticated attacker with SSLVPN user privi

Q&A with DoorDash’s CPO, Mariana Garavaglia

Learn how DoorDash is scaling AI adoption to empower employees to build, learn, and innovate faster in a conversation with Chief People Officer Mariana Garavaglia.

From Zero to GPU: A Guide to Building and Scaling Production-Ready CUDA Kernels

MCP for Research: How to Connect AI to Research Tools

Improved fake hardware detection with Vercel BotID

now uses an updated detection model that expands fingerprinting coverage for bespoke headless browsers and simulated device hardware.Vercel BotID Deep Analysis is an invisible CAPTCHA that classifies sophisticated bots without interrupting real users. The new Deep Analysis model enables more accurate identification of stealthy automation frameworks and spoofed hardware profiles in real time.BotID These updates take effect immediately for BotID Deep Analysis users with no action required, but we