Dependabot and Renovate are update bots: they open pull requests that move dependencies to newer versions. SCA scanners inventory your dependencies, match them to known vulnerabilities, and often add reachability, license and SBOM features. Most teams run an update bot for upkeep and a scanner for risk.
Safeguard publishes this guide and sells a competing product, so we describe other tools only from their own documentation.
Key takeaways
- Update bots answer "what is outdated". Scanners answer "what is vulnerable and does it matter".
- Dependabot is built into GitHub. Renovate runs on many platforms and is configured through files and presets.
- Both bots can react to vulnerability data, so the line with scanners is blurred, not clean.
- A scanner adds things bots do not document: reachability, license policy and SBOM export.
What does Dependabot do?
Dependabot has three parts. Alerts tell you a dependency has a known vulnerability. Security updates open pull requests to fix it. Version updates keep dependencies current even with no vulnerability.
GitHub's documentation says alerts come from the GitHub Advisory Database, and only advisories reviewed by GitHub trigger them. Version updates are enabled by checking a dependabot.yml file into the repository. By default a new version is not considered until 3 days after release, and that cooldown does not apply to security updates.
What does Renovate do?
Renovate is a tool for automated dependency updates across platforms and languages. Its docs say it opens pull requests that update dependencies and lock files on a schedule you set, and that it finds package files automatically, including in monorepos.
It supports GitHub, GitLab, Bitbucket, Azure DevOps, Gitea, Forgejo and others. The manager list in the docs shows 119 managers, including npm, maven, gradle, pip variants, cargo, gomod, docker and github-actions. Renovate is licensed AGPL-3.0-only. You can self host it, or use the Mend Renovate App, which Mend hosts.
What does an SCA scanner do that the bots do not?
A scanner starts from risk, not from version age. It builds an inventory of direct and indirect dependencies, matches them to vulnerability data, and reports severity. Many add:
- Reachability analysis, which checks whether your code calls the vulnerable function.
- License checks against an allow or deny list.
- SBOM export in CycloneDX or SPDX.
- Central reporting across repositories.
The Dependabot alerts page we read does not mention reachability. Renovate's configuration docs describe vulnerability handling but not reachability either.
How do the three compare?
| Question | Dependabot | Renovate | SCA scanner |
|---|---|---|---|
| Main job | Alerts plus update pull requests | Update pull requests | Find and rank vulnerable components |
| Where it runs | GitHub | Self hosted or Mend Renovate App; many platforms | Varies: CLI, CI, hosted |
| Vulnerability data | GitHub Advisory Database | Reads GitHub vulnerability alerts on GitHub; an experimental option reads OSV | Varies by tool |
| Direct vs indirect | Not stated on pages read | The OSV option checks direct dependencies only | Usually both |
| Reachability | Not mentioned | Not mentioned | Some tools document it |
| License policy | Not covered on the alerts page | Not covered | Often included |
| SBOM export | Not covered | Not covered | Often included |
| Configuration | dependabot.yml | Config files and shared presets | Varies |
Can Renovate act on vulnerabilities?
Yes, in two ways. The vulnerabilityAlerts option reads GitHub's vulnerability alerts, works only on GitHub, and needs the dependency graph and Dependabot alerts turned on. Renovate always creates security pull requests, even when a concurrent PR limit has been reached.
A second option, osvVulnerabilityAlerts, uses OSV data. The docs mark it experimental, say it checks only direct dependencies, and list the ecosystems it covers.
Should I use a bot, a scanner or both?
Use both when you can. The bot keeps versions fresh with small pull requests so that a security fix is not a large jump. The scanner tells you where the real risk is and gives you something to show a customer.
If you have to choose one for now, choose by the failure that hurts most. Stale dependencies call for a bot. Unknown vulnerabilities and customer evidence call for a scanner. You can try a scanner without installing anything by pasting a manifest into the free in-browser scan, which checks up to 100 dependencies and keeps the file in your browser.
How to choose
- List your repository hosts. Dependabot needs GitHub. Renovate does not.
- Check that your package managers appear in each tool's list.
- Decide whether you need reachability, license policy or SBOMs. If yes, add a scanner.
- Group updates to cut pull request volume. Dependabot has a groups option, and Renovate is customized through config files and presets.
- Define who reviews and merges the bot's pull requests, and how fast.
Frequently asked questions
Is Dependabot an SCA tool?
It overlaps with SCA because it detects vulnerable dependencies and opens fix pull requests. The documentation we read does not describe reachability, license policy or SBOM export.
Is Renovate better than Dependabot?
They fit different setups. Renovate runs on many platforms and has a large manager list, while Dependabot is built into GitHub.
Can I run Dependabot and Renovate together?
Both open update pull requests, so running both on the same repository tends to create duplicates. Pick one for version updates.
Does Renovate work on GitLab or Bitbucket?
Yes, its docs list GitLab, Bitbucket Cloud and Server, Azure DevOps, Gitea and others. Its vulnerabilityAlerts option is supported only on GitHub.
Do I still need a scanner if I use an update bot?
If you need reachability, license checks or an SBOM, yes. An update bot alone does not document those features.
Sources
- GitHub Docs: About Dependabot alerts
- GitHub Docs: About Dependabot version updates
- GitHub Docs: dependabot.yml options
- Renovate documentation
- Renovate supported managers
- Renovate configuration options
- Safeguard free scan
Last reviewed: 19 October 2026.
