Honest comparison

OpenCVE alternative for SaaS stacks

OpenCVE is the right tool if you want to search 350k CVEs, self-host, and run SOC remediation workflows. ZeroDayTracker is the right tool if you want CISA KEV alerts on the SaaS you actually pay for, without standing up another platform.

OpenCVE is a trademark of its owner. Their site. Facts from public pages as of 2026; products change.

Feature	ZeroDayTracker	OpenCVE
Primary signal	CISA KEV + critical NVD	Full CVE corpus (NVD, MITRE, Red Hat, KEV, more)
Setup	Name SaaS tools. No agent.	Subscribe to vendors/products (CPE) or self-host
Supplier graph	Parent, cloud host, identity fan-out	Not a SaaS supplier graph
Audience	CIOs and founders without a SIEM	SOCs, MSSPs, product security
Hosting	SaaS only	Community self-host or Cloud
Price	Free (3 tools) / $20/mo Keep Track	Free → €19+ Cloud; commercial license for some self-host uses

Pick ZeroDayTracker if

You are a CIO, founder, or lean security lead — not a SOC with a CVE queue.
You want exploited-first signal (CISA KEV), not every CVE in NVD.
You need supplier blast-radius (Slack → AWS, Auth0 → Okta) without building CPE subscriptions by hand.
You want a hosted product at $20/month, not a self-hosted stack or a Cloud plan aimed at MSSPs.

Pick OpenCVE if

You need a searchable archive of 350k+ CVEs with EPSS, KEV flags, and custom queries.
You want to self-host, assign owners, and track remediation status across a team.
You are an MSSP or product-security team monitoring many products, not a named SaaS watchlist.

OpenCVE won “CVE tracker.” We are not trying to take that.

OpenCVE ranks for CVE tracking because it publishes a public, searchable database. That is a different product. ZeroDayTracker publishes a SaaS-filtered KEV tracker and a supplier graph. If your search was “CVE database,” you are in the wrong aisle. If it was “CISA KEV alerts for my stack without a SIEM,” you are not.

Noise is the actual competitor

A hosted CVE feed that emails every HIGH on Microsoft, Linux, and Cisco will train you to ignore email. We match a curated catalog (~90 SaaS and platform vendors) and only fan out through relationships you would explain to a board: parent, cloud host, identity. That is fewer alerts. That is the point.

Other comparisons: Sentrytex · vulntracker.io · Recorded Future

Questions

Is ZeroDayTracker an OpenCVE alternative?

For “alert me when something I use is being exploited,” yes. For “search every CVE and run a remediation workflow,” no — use OpenCVE.

Do I still need OpenCVE if I use ZeroDayTracker?

If someone on your team triages the full NVD, keep OpenCVE or the NVD itself. ZeroDayTracker does not replace a CVE database.

Watch the SaaS that holds your data.

Three tools free. Keep Track is $20/month for supplier blast-radius, full history, and a digest.

Start watching — free Pricing