About patchletter

patchletter is a free update radar for sysadmins: pick the software and hardware in your environment, and get an email the moment the vendor ships a new release. Over 320 products across browsers, operating systems, virtualization, firewalls, network gear, NAS, servers, databases, monitoring and DACH business software.

How we detect updates

For every product we track one or more official, public sources — vendor release feeds and RSS, GitHub and GitLab releases and tags, package repositories (WinGet, Chocolatey), the endoflife.date support-cycle data, and structured vendor pages. Our crawler checks them daily, uses conditional requests (ETag/Last-Modified) to be gentle, and keeps generous rate limits. New versions are normalized and sorted so the latest release — and the full history — is always accurate.

Our crawler is transparent — see the patchletterBot crawler policy.

Security signals

Product pages cross-reference the CISA Known Exploited Vulnerabilities (KEV) catalog. When a product has a vulnerability that is being actively exploited in the wild, we flag it prominently — with the CVE, a link to the authoritative entry, and a ransomware marker where applicable — so you can prioritize patching.

Trust & privacy

patchletter is deliberately data-minimal: the only required datum is an email address. No tracking pixels in emails, no advertising cookies, cookieless analytics, and servers in Germany. Every email has a one-click unsubscribe, and you can delete your account and all data with one click at any time.

Who runs it

patchletter is operated by Kolja Sagorski (sagorski.it) in Germany. Full details and contact in the legal notice. Missing a tool? Suggest it.