Mostly yes. SAST (static application security testing), static code analysis and source code analysis all describe checking code that is not running for possible flaws. The labels differ in emphasis: SAST stresses security, static code analysis can include quality checks, and source code analysis stresses that the input is source.
Why three names exist
The terms grew up in different communities. OWASP describes static code analysis, also known as source code analysis, as running tools that try to highlight possible vulnerabilities within "static" (non-running) source code, using techniques such as taint analysis and data flow analysis. Buyers and analysts later added the "application security testing" label, which gives us SAST.
So when a vendor page says "static analysis," a buyer says "SAST," and an older standard says "source code analysis," they are usually pointing at one family of tools.
Where the labels do differ
| Label | Typical emphasis | What to check |
|---|---|---|
| SAST | Security flaws in code you write | Which weakness types it reports |
| Static code analysis | Can mix security, bugs and style | Whether the checks are security specific |
| Source code analysis | The tool reads source, not binaries | Whether it needs a buildable project |
| Linting | Style and simple bug patterns | Whether it follows data across functions |
A linter is a close cousin. It often works on syntax patterns inside one file. A SAST tool is expected to follow data from an input to a risky operation. That difference matters when you compare tools, because two products can both say "static analysis" and do very different amounts of work.
What every tool in this family has in common
Three traits hold across the label differences:
- They read code without running it, so they can run on a pull request or a nightly build.
- They report possible issues, not proven ones. OWASP notes that such tools often serve as aids that help an analyst zero in on security relevant code, rather than tools that simply find flaws automatically.
- They have blind spots, such as access control logic and configuration that is not represented in the code.
How to use this when you buy
Ignore the label and ask for specifics. Which languages and frameworks does it understand? Does it follow data across files? Does it need a build? What does a finding look like, and can you export it? These questions work no matter which of the three names the vendor uses.
When a team member says "we already do static analysis," ask what it actually checks. A formatter and a data flow engine are both static, and only one of them is likely to catch an injection flaw.
A worked example: one flaw, three labels
Suppose a service reads a query parameter called name and builds a database query by joining it into a string. Here is how each label would treat it.
A linter configured for style might not mention it at all, or it might warn about string concatenation in general. A static code analysis tool aimed at quality might report "dynamic query construction" as a code smell. A SAST tool is expected to say more: the value arrives from an HTTP request (a source), travels through two functions with no cleaning step, and reaches a database call (a sink). It reports a weakness type, typically SQL injection, and shows the path.
The three outputs are all "static" and all useful, but they answer different questions. The first two say the code looks risky. The third says untrusted data can reach a dangerous place, which is what a security reviewer needs to decide on a fix.
How to tell what a product really does
When a product page uses one of these labels, you can test the claim in under an hour. Use this short procedure:
- Create a small test project with two files. In the first, read a request value. In the second, pass it to a function that runs a query.
- Keep the code safe in one copy by using a parameterized query, and unsafe in another copy.
- Scan both copies.
- Check whether the tool flagged the unsafe copy, stayed quiet on the safe copy, and showed a path across the two files.
A tool that only inspects one file at a time will miss the cross file path. A tool that flags both copies is producing noise. This is the same idea as the paired test cases NIST uses in its public test suites, scaled down to a single afternoon.
Where the terms came from, and why that matters to buyers
OWASP places this activity at the implementation phase of a security development lifecycle and describes it as commonly done as part of code review. That origin explains why older documents say "source code analysis" and talk about analysts reading tool output. Newer marketing says SAST and talks about pipelines and pull requests. The underlying job has not changed: help a person find security relevant code faster. OWASP says such tools frequently serve as aids that help an analyst zero in on security relevant portions of code, instead of simply finding flaws automatically.
That matters when you set expectations internally. If leadership hears "SAST" and imagines a machine that finds every flaw, the program will disappoint. If they hear "an aid that focuses reviewers," the program can succeed on realistic terms.
Words that signal depth, and words that do not
| Phrase on a product page | What it suggests | Follow up |
|---|---|---|
| "Taint tracking" or "data flow" | Follows input toward sinks | Ask how many files deep |
| "Pattern matching" or "rules" | Looks for known shapes | Ask how rules are written |
| "Semantic analysis" | Understands code meaning to some degree | Ask for an example |
| "AI powered" | Uses a model somewhere | Ask where, and what leaves your network |
| "Deep scan" | Marketing term | Ask what changes in the scan |
None of these phrases is a verdict. They are prompts for a better question.
A quick vocabulary rule for your own team
Pick one term and use it internally. Most teams choose SAST for security checks and "linting" for style checks, and keep "static analysis" as the umbrella. Put the choice in your engineering handbook so that tickets, dashboards and vendor calls use the same words. It sounds small, but mixed vocabulary is a common reason two teams think they have the same coverage when they do not.
Try it yourself
Click through it at your own pace, or open it full screen. Look at how a finding points to a location in code and names a weakness type.
Quick check
Is SAST the same as a linter?
No. A linter mostly checks style and simple patterns. SAST is expected to trace untrusted input toward risky operations, although some products blur the line.
Does source code analysis work without the source?
By name, no. Some tools can analyze compiled output instead, so ask the vendor what input it accepts.
Do I need both a linter and a SAST tool?
They do different jobs. A linter keeps style and simple bugs in check and runs in seconds. A SAST tool looks for security weaknesses across more code. Many teams run both.
Safeguard offers SBOM and dependency scanning, plus reachability analysis that shows whether vulnerable code is actually called. You can try the free scan at gold.safeguard.sh/scan.
Sources
Last reviewed: 19 October 2026.
