Quick answer: SpiderFoot is a free, open-source OSINT automation tool with 200+ modules, a web UI, a CLI, a correlation engine and graph views. It is one of the best all-in-one reconnaissance tools for beginners, penetration testers and security learners. Its main downsides are that many data sources need API keys, big scans can be slow, and the open-source release (v4.0) is not updated often.
This is our complete, hands-on overview of the SpiderFoot OSINT tool for 2026: what it does, key features, who should use it, how it compares with Maltego, theHarvester, Recon-ng and Amass, and practical workflows for pentesters and learners.
SpiderFoot at a Glance
| Type | OSINT and reconnaissance automation framework |
| Creator | Steve Micallef |
| Licence / price | MIT, free (commercial hosted edition available from Intel 471) |
| Latest open-source release | v4.0 |
| Language | Python 3 |
| Interfaces | Web UI (port 5001), CLI (sf.py), interactive client (sfcli.py) |
| Modules | 200+ |
| Platforms | Windows, macOS, Linux, Kali, Docker, Android (Termux) |
| Export formats | CSV, JSON, GEXF |
| Best for | Recon, attack-surface mapping, threat checks, digital footprint audits |
What SpiderFoot Does
You give SpiderFoot a target. It queries public sources and APIs, and every new finding becomes a new search. The result is a map of everything publicly connected to your target: domains, subdomains, IPs, emails, usernames, leaked credentials, open ports, technologies, hosting providers, social profiles, and threat-intel hits. See the full list of inputs in what targets SpiderFoot can analyze.
Key Features
- 200+ modules for DNS, WHOIS, certificate transparency, search engines, breach data, threat intelligence, social media, cloud storage and the dark web (via Tor). See all modules and data sources.
- Use-case profiles: All, Footprint, Investigate, Passive.
- Correlation engine: 37 built-in YAML rules to flag risky findings; write your own.
- Visual graph of relationships between entities.
- Web UI and CLI for both point-and-click and scripted use. Compare them in web interface vs command-line mode.
- SQLite backend so you can query results directly.
- Tor integration for .onion searches.
Pros and Cons
| Pros | Cons |
|---|---|
| Free and open source | Many high-value sources need API keys (some paid) |
| Huge module library in one tool | “All” scans can be slow and noisy |
| Beginner-friendly web UI | Open-source release is updated infrequently |
| Automatic correlation of findings | Pinned dependencies can fail on the newest Python versions |
| Scriptable CLI for automation | Results need manual verification (false positives) |
| Runs on almost any OS, even Android | No built-in scheduling or multi-user features in the free version |
Who Should Use SpiderFoot?
Beginners and students
The web interface and Passive profile make it a safe, visual way to learn how OSINT works. Start with our SpiderFoot tutorial for beginners and read is SpiderFoot suitable for beginners.
Penetration testers and red teams
SpiderFoot speeds up the reconnaissance phase: subdomains, exposed services, employee emails and leaked credentials, all in one report. It fits the first stage of any penetration testing methodology.
Blue teams and SOC analysts
Use it to monitor your own attack surface, check suspicious IPs and domains, and find leaked company data before attackers do. See how it supports both offensive and defensive security.
Investigators and journalists
It helps link infrastructure, emails and online identities during due-diligence and fraud investigations, provided you work lawfully and ethically.
SpiderFoot vs Other OSINT Tools
| Tool | Price | Interface | Strength | Choose it when |
|---|---|---|---|---|
| SpiderFoot | Free (open source) | Web UI + CLI | Broad automation, 200+ modules, correlations | You want one tool that does most recon automatically |
| Maltego | Commercial, limited free tier | Desktop GUI | Powerful link analysis and visual investigations | You need rich graph analysis and a budget allows it |
| theHarvester | Free | CLI | Fast email, subdomain and host discovery | You need a quick, focused email/subdomain sweep |
| Recon-ng | Free | CLI (Metasploit-like) | Modular framework with workspaces | You like a console workflow and custom modules |
| OWASP Amass | Free | CLI | Deep subdomain enumeration and asset mapping | Subdomain discovery is your main goal |
Many professionals use SpiderFoot together with these tools: SpiderFoot for broad automated recon, then Amass or theHarvester for deeper focused checks.
How to Get Started in 3 Steps
- Install it: follow our SpiderFoot install guide (or Kali guide).
- Run a Passive scan on a domain you own at
http://127.0.0.1:5001. - Add API keys and explore the Correlations and Graph tabs.
Practical Workflows
For pentesters: external recon in 30 minutes
- Confirm scope and written authorisation.
- Run a Footprint scan on the in-scope domain.
- Export subdomains and IPs (
-t INTERNET_NAME,IP_ADDRESS) for your port scanner. - Review leaked emails and credentials for phishing or password-spray risk (report, do not misuse).
- Document findings with source modules for your report.
For learners: build an OSINT portfolio
- Scan your own domain or a lab domain.
- Write a one-page summary of what you found and how to fix it.
- Repeat with Investigate on a known-malicious test indicator from a public threat feed.
Speed up both with our SpiderFoot commands cheat sheet.
Is SpiderFoot Safe and Legal?
The official code from GitHub is widely used and open for review. Legality depends on how you use it: scan only what you own or are authorised to test, and handle personal data according to laws like GDPR. Protect your scan database, since it can contain sensitive information; read how secure SpiderFoot data is.
Our Verdict
For a free tool, SpiderFoot offers remarkable coverage. It is the best “first tool” for OSINT learners and a real time-saver for pentesters and blue teams. Pair it with a few free API keys and a focused tool like Amass, and you have a professional-grade recon toolkit at zero software cost.
Frequently Asked Questions
What is the SpiderFoot OSINT tool used for?
SpiderFoot automates open-source intelligence gathering. It is used for reconnaissance in penetration tests, attack-surface monitoring, threat investigation, brand protection and personal digital-footprint audits.
Is SpiderFoot better than Maltego?
They serve different needs. SpiderFoot is free and excels at broad automated collection. Maltego is a commercial tool with stronger interactive link analysis. Many analysts use both.
Is SpiderFoot still maintained in 2026?
The open-source project is still available and widely used, and it is packaged in Kali Linux. The latest tagged release is v4.0, and updates are infrequent, so you may need Docker or an older Python version to avoid dependency issues.
Does SpiderFoot work without API keys?
Yes, many modules work without keys. Adding free API keys from services like VirusTotal, Shodan and SecurityTrails greatly improves results.
Can pentesters use SpiderFoot in real engagements?
Yes. It is commonly used in the reconnaissance phase of authorised penetration tests to discover subdomains, IPs, exposed services, emails and leaked data.
Is SpiderFoot free?
Yes. The open-source edition is free under the MIT licence. A paid, hosted commercial edition is also available from Intel 471.
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