Overview
Security scanning covers a few different jobs that often get lumped together: website and header checks, TLS and server configuration review, static analysis for code, dependency and secret scanning, container and IaC checks, and broader vulnerability management for internet-facing assets. If you are comparing options, the first question is not which scanner is best overall, but what layer you need to inspect and how often you need to run it. A site owner, a DevOps engineer, and an open source maintainer may all land in this category for very different reasons.
What to look for in free security scanning tools
A meaningfully generous free tier here usually lets you scan real targets repeatedly without forcing you into a one-off demo flow. For web checks, that means public URL scans, clear findings, and enough repetition to re-test after changes. For code and repository scanners, it usually means support for at least one serious workflow such as open source projects, a small number of private repos, or developer-only use with useful integrations. For infrastructure and TLS tools, the better free offerings let you test live hosts or ports directly instead of hiding the scanner behind sales contact or a short trial.
The weaker free tiers tend to be easy to spot once you look past the headline. Some vendors call something free but only expose a thin preview, a single report type, or an introductory trial that ends just as you are ready to validate remediation. Others support only public projects, only one repository, or only a narrow slice of checks such as headers or TLS settings while omitting the broader AppSec workflow. That can still be useful, but it is not the same as a free plan you can rely on while shipping.
Common gotchas in security scanning free tiers
When you compare free security scanning tools, pay attention to what happens after the first pass. Look for repeated scans, integrations with your repo or CI workflow, and findings that are actionable enough to fix, not just informational badges. Also watch for products that bundle unrelated capabilities like SEO or uptime in the same interface, because those can be useful for website hygiene but do not replace code, dependency, or infrastructure scanning. The best fit is usually the scanner that matches your surface area and gives you enough room to keep checking it as the codebase changes.
The 10 highest-FTV free security scanning tiers
| Product | Type | Free tier includes | Est. value | Card required |
|---|---|---|---|---|
| Sucuri SiteCheckFTV 92 | Always free | Free website scan for malware, blocklist status, DNS, uptime, redirects, and SEO spam. | Unbounded | No |
| Test TLSFTV 90 | Always free | Ability to test a TLS server on any port. | Unbounded | Not stated |
| AWS Security AgentFTV 72 | Intro tier | Up to 400 pentesting task-hours per trial month for new AWS Security Agent customers. | $1,000 / month | Not stated |
| CorgeaFTV 62 | Free tier | AI SAST with up to 2 team members and 10 repositories. | $19 / month | No |
| MeterianFTV 52 | Free tier | Unlimited open source projects. | $25 / month | Not stated |
| CheckbotFTV 49 | Free tier | 100 URLs per crawl. | $2.00 / month | No |
| Coverity ScanFTV 48 | Free tier | Access to analysis results for registered open source projects at no charge. | $8.00 / month | Not stated |
| CodacyFTV 44 | Free tier | Free forever for open-source projects. | $18 / month | No |
| DeepSourceFTV 43 | Free trial | Open Source plan includes 1,000 pull requests reviewed per month. | $24 / month | No |
| HostedScanFTV 34 | Free trial | 5 targets included during the trial. | $18 / month | Not stated |
Best free security scanning picks by use case
Best for: You want a quick public website check before a launch
Good for a fast browser-side scan when you want to catch obvious malware, blocklist, redirect, or injected-content issues without setting up an agent. It is a lightweight way to sanity-check a live site before sharing it broadly.
Best for: You need to inspect server TLS setup on a specific host or port
Best when your main concern is certificate and protocol hygiene on a live service rather than full application scanning. It is especially useful for checking the exact endpoint behavior you are exposing to users.
Best for: You are securing a small codebase with several scan types in one place
A strong fit if you want one workflow for code, dependencies, secrets, containers, and IaC rather than stitching together separate tools. The free tier is most attractive for small teams that need broad coverage on a limited set of repositories.
Best for: You maintain an open source project and want ongoing static analysis
Useful when your project is public and you want deeper analysis tied to submitted builds instead of a quick surface-level report. It is aimed at maintainers who can work within an approval-based open source workflow.
Best for: You need a developer-friendly scanner for open source repos and IDE workflows
A good choice when you want code quality and security checks to live close to the editor and pull request flow. Its open source-friendly setup makes it attractive for teams that want scanning to fit into everyday development rather than a separate security gate.
Frequently asked questions
Is there a truly free security scanning option for public websites?
Yes, there are tools that let you scan public websites without paying, especially for quick checks of malware, headers, redirects, or basic best-practice issues. The tradeoff is that many free website scanners are narrower than full vulnerability management platforms.
What should I expect from a free security scanning free tier?
A strong free tier usually gives you enough access to scan real targets, review meaningful findings, and repeat the scan after changes. If it only shows a sample report or a thin preview, it is better thought of as a trial than an ongoing free plan.
Which free appsec scanning tools work best for code repositories?
If you are scanning repositories, look for tools that support pull requests, dependency checks, secrets, and CI or Git integrations. Open source-friendly plans are often the most usable because they allow ongoing scans without turning every review into a sales conversation.
What are the biggest catches with online vulnerability scanners?
The most common catch is scope: a tool may scan only one layer, such as a website, TLS config, or open source code, while leaving the rest to other products. Another common limitation is that the free version is restricted to public projects, a small number of targets, or a short introductory period.
Do I need different tools for website scanning and code scanning?
Often, yes. Website scanners are good for public-facing checks, while code and dependency scanners are better for catching issues earlier in the development process, so the right mix depends on where you want to find problems first.
