patchletter vs. Vulmon Alerts
Vulmon Alerts is a free CVE notification service: subscriptions on vendors, products or keywords, CVSS filtering, delivery via email, Slack, Teams or RSS — focused on instant notification of new vulnerabilities.
patchletter takes a different angle. We follow the vendors' own release sources, pull in the demonstrably exploited flaws from CISA's KEV catalogue and record the end-of-support dates from endoflife.date. Whether you hear about it instantly, once a day or once a week is yours to set. The update radar costs nothing.
Side by side
| Feature | patchletter | Vulmon Alerts |
|---|---|---|
| Release tracking for vendor products (Proxmox, FortiOS, Veeam …) | ✓ curated vendor sources: APIs, feeds, release-notes pages | ✗ |
| Actively exploited vulnerabilities (CISA KEV) | ✓ curated & low-noise — only demonstrably exploited CVEs; free to read, alert email with Pro | partly all new CVEs, no dedicated KEV curation |
| End-of-life / support dates | ✓ endoflife.date data on every product page; warning email 90/30/7 days ahead with Pro | ✗ |
| Hardware / firmware (firewalls, NAS, switches) | ✓ | ✗ |
| Email instantly / daily / weekly | ✓ | ✓ |
| Slack / Teams / webhooks | partly Slack, Teams, webhook with Pro | ✓ |
| API | ✓ read-only REST API v1, free and without an account; plus an RSS feed per product | ✓ |
| Free to use | partly update emails free; security and EOL alerts with Pro | ✓ |
When Vulmon Alerts is the better choice
- Flexible subscription types (including keywords and researchers) and CVSS thresholds — more knobs for security professionals.
- Slack/Teams integration and an API are already available.
Nothing wrong with running both: Vulmon Alerts for its strengths, patchletter for the vendor gear it can’t see.
Tick off what you run
Confirm your address once, and after that an email arrives as soon as one of your vendors ships a new version. That is all we need.
Browse the catalogFacts about Vulmon Alerts verified: 2026-08. Spotted something outdated? Let us know via the legal-notice contact. All product names are trademarks of their respective owners.