A free dependency scanner is enough when you have few repositories, one or two ecosystems, a team that will triage results, and no external party asking for evidence. Once any of those changes, revisit the decision. Buying early is a poor use of budget, and so is clinging to free tools past the point they cost more in time.
Five conditions that favour free
- Small footprint. A handful of repositories and a few teams. You can see everything without a central system.
- Common ecosystems. Mainstream languages are well covered by free tools and public advisory data.
- Someone owns it. A named person reads results weekly and chases fixes. A scanner with no owner produces a list that ages.
- Light external pressure. No customer contracts or regulators requiring formal evidence, reports or defined remediation times.
- Fast feedback only. A check in the pipeline that fails on new critical issues covers your need.
If all five hold, install a free scanner, add it to CI and review monthly. You will catch a large share of known issues at no license cost.
What free tools usually leave to you
- Storing history to show trends and closure.
- Combining results across repositories.
- Suppression rules with reasons and expiry.
- Prioritising beyond severity.
- Producing evidence for audits or customer questionnaires.
- Opening fixes and chasing owners.
Each is manageable at small scale. The cost appears as you grow.
Signs you have outgrown it
- Customers send questionnaires and you reconstruct answers by hand each time.
- Nobody can say how many open critical issues exist today.
- Teams use different tools and settings, so numbers cannot be compared.
- Developers ignore the output because volume is high and context is thin.
- The person who set it up has left and nobody knows how it runs.
- You need a signed-off exception process.
Two or three of these is a prompt to evaluate alternatives. Use the evaluation scorecard approach to keep the comparison fair.
Getting the most from the free route
- Pin the scanner version and update it deliberately.
- Run it on a schedule as well as on pull requests, so new advisories on old code are caught.
- Keep a simple register of accepted risks with dates.
- Generate an SBOM at release time and store it with the build.
- Record who reviews results and when.
These habits also make a later migration easier because your history and rules are already written down.
A simple review rhythm
Put a date in the calendar every six months to ask three questions. Is anyone outside the team asking for evidence? Has the number of repositories or ecosystems grown? Is the person who runs the scanner still the right person? If all three answers are no, keep what you have. If any is yes, run a short comparison before the pain builds.
Where Safeguard fits: the free scan is a no-cost way to check a public repository, and the platform adds SBOM and dependency scanning, policies and compliance evidence automation if you outgrow a script.
Quick check
Do free scanners miss real vulnerabilities?
They miss what their data and parsers do not cover, as any tool does. Check coverage for your ecosystems and test with a known vulnerable version.
Last reviewed: 19 October 2026.
