The Sandbox BriefA weekly read on the sandbox world: what moved across AI, enterprise and regulatory sandboxes, with commentary and sourced links. By Eve Harper.https://comparesandboxes.com/enThe EU AI Act's sandbox deadline arriveshttps://comparesandboxes.com/newsletter/2026-08-07-eu-ai-act-sandbox-deadline/https://comparesandboxes.com/newsletter/2026-08-07-eu-ai-act-sandbox-deadline/August 2 was the statutory date for every EU member state to have an AI regulatory sandbox operational. The reality on the ground is uneven.Fri, 07 Aug 2026 12:00:00 GMTA developer-platform week: Twilio and Shopifyhttps://comparesandboxes.com/newsletter/2026-07-31-twilio-and-shopify-week/https://comparesandboxes.com/newsletter/2026-07-31-twilio-and-shopify-week/Twilio ships US Branded Calling GA and WhatsApp tooling; Shopify updates the Hydrogen developer preview.Fri, 31 Jul 2026 12:00:00 GMTCloudflare's Sandbox SDK hits a 1.0 preview, and Devin moves inhttps://comparesandboxes.com/newsletter/2026-07-24-cloudflare-sandbox-1-0/https://comparesandboxes.com/newsletter/2026-07-24-cloudflare-sandbox-1-0/Cloudflare ships a Sandbox SDK 1.0 preview and runs Cognition Devin on its Containers; Modal ships 1.5.3.Fri, 24 Jul 2026 12:00:00 GMTThe FCA's AI sandbox opens its second cohort, with GPUs and Claudehttps://comparesandboxes.com/newsletter/2026-07-17-fca-supercharged-sandbox/https://comparesandboxes.com/newsletter/2026-07-17-fca-supercharged-sandbox/The UK regulator launches cohort 2 of its Supercharged Sandbox: 199 applications, 21 firms, GPU infrastructure, and access to Claude.Fri, 17 Jul 2026 12:00:00 GMTModal tightens the SDK, Plaid keeps iteratinghttps://comparesandboxes.com/newsletter/2026-07-10-modal-tightens-plaid-iterates/https://comparesandboxes.com/newsletter/2026-07-10-modal-tightens-plaid-iterates/Modal 1.5.2 adds workspace APIs and a blocking volume reload; Plaid extends Identity Verification, Investments and Transactions.Fri, 10 Jul 2026 12:00:00 GMTPlaid rebuilds its mobile SDKs from the ground uphttps://comparesandboxes.com/newsletter/2026-07-03-plaid-rebuilds-its-sdks/https://comparesandboxes.com/newsletter/2026-07-03-plaid-rebuilds-its-sdks/Plaid ships a Kotlin Android SDK and an Expo-based React Native SDK, and the Android footprint drops about 74%.Fri, 03 Jul 2026 12:00:00 GMTA quiet week, and what 'quiet' tells youhttps://comparesandboxes.com/newsletter/2026-06-26-a-quiet-week/https://comparesandboxes.com/newsletter/2026-06-26-a-quiet-week/No day-precise sandbox news landed this week, so a short, honest note on reading the gaps between announcements.Fri, 26 Jun 2026 12:00:00 GMTAWS makes AgentCore Harness GA, and Daytona closes its sourcehttps://comparesandboxes.com/newsletter/2026-06-19-agentcore-ga-daytona-closes/https://comparesandboxes.com/newsletter/2026-06-19-agentcore-ga-daytona-closes/Big cloud and scrappy startup moved in opposite directions: AWS shipped a managed microVM agent runtime, Daytona took its code closed.Fri, 19 Jun 2026 12:00:00 GMT