June 18, 2026 Detect VPN traffic with new IP intelligence
Recently we launched <Anchor label="Residential Proxy detection and richer IP tunnel intelligence" target="blank" href="https://docs.castle.io/changelog/detect-residential-proxies-with-new-ip-intelligence">Residential Proxy detection and richer IP tunnel intelligence</Anchor> . Now we're extending t...
Read about Detect VPN traffic with new IP intelligence June 5, 2026 Export team members to CSV
You can now export your team members list to a CSV file directly from the Team settings page. This is useful for access reviews, compliance audits, or keeping an offline record of who has access to your Castle account. The export includes all visible columns: member since, name, email, user role, 2F...
Read about Export team members to CSV June 2, 2026 New event field: `email.registered_domain`
Castle already provides the event field, reflecting the full domain from the email address. With this release, we're adding , which reduces any subdomain to its registered part using the public suffix list. Fraudulent domains often rotate across subdomains (, , and so on). collapses those to , so...
Read about New event field: `email.registered_domain` May 28, 2026 Detect residential proxies with new IP intelligence
Castle has long provided Proxy IP and Tor IP signals to flag suspicious IP activity. With this release, we're adding a new Residential Proxy IP signal and richer IP tunnel intelligence. Residential proxies route traffic through real consumer ISPs, making them invisible to traditional datacenter-base...
Read about Detect residential proxies with new IP intelligence May 19, 2026 Phone call detection
Castle can now detect when a user is on a phone call during sensitive actions like login or transactions. This helps you catch social engineering attacks, where a scammer calls the victim and walks them through actions while simultaneously taking over their account. Three new fields are available un...
Read about Phone call detection April 1, 2026 CSV export for Lists
Export the entries of any List to CSV. Click Export in the list toolbar and download your data. For larger lists the export runs in the background - you'll receive an email with a download link when it's ready. <Image align="center" border={true} src="https://files.readme.io/210d6d42b6fa79c0790cd8a1...
Read about CSV export for Lists March 19, 2026 IOS SDK 4.0.0 Release
Version 4.0.0 is a major update to the Castle iOS SDK. This release includes several improvements detailed below. Please review the breaking changes below before upgrading. What's new Expanded device signals: Additional device signals collected for broader detection coverage. SDK protection: Adde...
Read about IOS SDK 4.0.0 Release January 26, 2026 Webhook API Key selection
Castle now lets you choose which API Secret is used for webhook signing. This makes it easier to isolate integrations and rotate secrets independently. Available on Enterprise plans. If you don’t make a selection, webhooks will continue using the API Secret that was previously in use. <Image align="...
Read about Webhook API Key selection December 22, 2025 Dark mode
Castle now supports dark mode. The interface automatically adapts to your system's color scheme preference. For users who want manual control, you can override the automatic setting from the user menu. Choose between Light, Dark, or System (auto) at any time. <Image align="center" border={true} src=...
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