Shodan Alternatives for Exposure Search
Shodan (shodan.io) has been the "search engine for IoT" since 2009. Indexes open TCP/UDP services across the global IP space. Premium $69-$899/mo. Alternatives: Enterno.io Port Scanner (one-domain audit, free), Censys (similar, cheaper), ZoomEye (Chinese), BinaryEdge. For targeted perimeter audit — Enterno. For global research — Shodan/Censys.
Below: competitor overview, feature-by-feature comparison, when Enterno.io wins, FAQ.
About the Competitor
Shodan founded by John Matherly in 2009. Scans 120+ ports across all IPv4. Commercial: free tier 50 results/search, paid $69+/mo. Popular in security research + blue team + journalism.
Enterno.io vs Competitor — Feature Comparison
| Feature | Enterno.io | Competitor |
|---|---|---|
| Scan your own domain | ✅ Free | ⚠️ Paid |
| Global internet search | ❌ | ✅ |
| Historical records | ⚠️ monitoring | ✅ multi-year |
| Vulnerability matching (CVE) | ⚠️ basic | ✅ |
| Alerts on new exposure | ✅ | ✅ Paid |
| Banner grabbing | ✅ | ✅ |
| Ruble billing | ✅ | ❌ |
| Price | ₽0-490/mo | $69+/mo |
When to Pick Enterno.io
- Auditing your own perimeter (one or few IPs/domains)
- Budget constrained, need RUB billing
- Want continuous monitoring with alerts on new open ports
- Shodan better for global security research
Why teams trust us
How it works
Enter IP or domain
ICMP packets sent
Latency & packet loss shown
How Do Ping and Port Scanning Work?
Ping sends ICMP packets to a host and measures response time. Port scanning checks which TCP ports are open and accepting connections — helping diagnose serviceavailability issues.
Configurable Ping
Choose packet count (3, 4, 6, 10). Stats: min/avg/max latency and packet loss.
Common Port Scanner
Check 14 key ports: HTTP, HTTPS, SSH, FTP, SMTP, MySQL, PostgreSQL, and more.
Cloud-Based Check
Testing from our server — see site availability from outside, not just your local network.
Uptime Monitoring
Need constant monitoring? Create a monitor — checks every minute with notifications.
Who uses this
DevOps
availability diagnosis
Network engineers
TCP port scanning
Developers
connection debugging
SRE
basic health check
Common Mistakes
Best Practices
Get more with a free account
Ping check history, host availability monitoring and downtime alerts.
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Frequently Asked Questions
Is using Shodan legal?
Shodan itself scans and indexes. Searching the index is legal everywhere. Scanning others' IPs yourself can be illegal in your jurisdiction.
How long does Shodan see my exposure?
Re-scans every 1-4 weeks. If you closed a port, it can linger in the index for ≤30 days.
How do I hide my server from Shodan?
Firewall: whitelist only required IPs. ACL on router + iptables on the server. Full invisibility is impossible but 99% of attack surface is hideable.
Most dangerous exposure in 2026?
<a href="/en/s/research-open-ports-exposure-2026">Our research</a>: Elasticsearch 9200 no-auth, Redis 6379, MongoDB 27017.