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GreyNoise is an enterprise threat intelligence platform that identifies mass-scanning IPs and benign services. SikkerAPI is a honeypot-powered IP reputation API that captures what attackers actually do after connecting — across 16 protocols, at a price point built for developers and sysadmins. Different tools, different strengths.
| Dimension | SikkerAPI | GreyNoise |
|---|---|---|
| Approach | High-interaction honeypots across 16 protocols | ~5,000 passive/deception sensors across 80+ countries |
| What it captures | Post-authentication behavior: commands, queries, downloads, lateral movement | Scan activity: ports touched, HTTP paths, TLS/SSH fingerprints |
| SSH depth | 105+ fake commands, full command history, download capture with SHA256 | HASSH fingerprinting, port/protocol detection |
| Database protocols | MySQL, PostgreSQL, MongoDB, Redis, MSSQL, Elasticsearch — captures actual queries | Not enumerated |
| SMB / lateral movement | NTLM auth + named pipe access (svcctl, winreg, eventlog) | Not enumerated |
| IoT / Mirai capture | Telnet BusyBox with 3 device profiles | Not enumerated |
| Community reports | Yes — 16 categories, bulk CSV, Fail2Ban auto-reporting | No |
| Benign scanner ID | No | Yes — curated list of known-good scanners |
| Business service IPs (RIOT) | No | Yes — 59M IPs from CDNs, SaaS, DNS providers |
| Feature | SikkerAPI | GreyNoise |
|---|---|---|
| Single IP lookup | Yes — score, geo, protocols, behaviors, reports | Yes — classification, metadata, tags, CVEs |
| Bulk IP lookup | Up to 10,000 IPs | Up to 10,000 IPs |
| Query language | No | GNQL (Lucene-based, boolean, CIDR, time filters) |
| Blacklist download | All tiers — filter by country, ASN, protocol, severity, score | Paid plans only |
| Subnet/CIDR lookup | IPv4 /16–/32, IPv6 /48–/128 | Via GNQL query |
| STIX/TAXII | Native TAXII 2.1 server | Via OpenCTI/MISP connectors |
| Community reporting | Single + bulk reports, 16 categories | No |
| IP timeline / history | No | 90-day behavioral history |
| IP similarity (ML) | No | 693-dimension behavioral vectors |
| CVE exploitation tracking | No | With spike detection |
| JA3/JA4 + HASSH | No | TLS + SSH fingerprinting |
| Webhooks | No | Real-time push notifications |
| Tor exit detection | Yes | Yes |
| Scoring transparency | Published algorithm with exact weights | Classification logic not public |
| Integration | SikkerAPI | GreyNoise |
|---|---|---|
| Fail2Ban | Yes — auto-report banned IPs | No |
| iptables / ipset | Yes — with atomic swap script | No |
| nginx | Yes — with auto-update cron | No |
| CSF Firewall | Yes | No |
| Splunk | Via TAXII | Native app |
| Microsoft Sentinel | Via TAXII | Native connector |
| Elastic Security | Via TAXII | Native integration |
| SOAR platforms | No | 12+ (XSOAR, Phantom, Tines, etc.) |
| Enterprise firewalls | No | Palo Alto, Cisco, Fortinet, Sophos |
| Python SDK / CLI | No | pip install greynoise |
All features on every tier. No feature gating. Yearly billing available.
Features gated by tier (Triage, Investigate, Hunt modules). Pricing not publicly listed — requires sales contact.
GreyNoise identifies mass-scanning IPs and classifies them as benign or malicious. SikkerAPI captures what attackers do after connecting — SSH commands, SQL queries, file downloads, lateral movement — across 16 protocol honeypots.
SikkerAPI offers 1,000 free lookups/day with all features. GreyNoise offers 50/week with limited fields. They collect different data, so it's not a drop-in replacement — but SikkerAPI provides actionable IP reputation at a fraction of the cost. See all plans.
Yes. GreyNoise tells you whether an IP is a known scanner. SikkerAPI tells you what that IP did when it connected — the commands it ran, the queries it executed, and the patterns it used. At $0–56/month, adding SikkerAPI alongside GreyNoise is low-cost behavioral depth.
No. SikkerAPI provides REST API endpoints with filtering by country, ASN, protocol, severity, and confidence score. GNQL is most valuable for dedicated threat analysts. For IP lookups, blacklists, and reporting, REST filters cover the common use cases.
SikkerAPI: free (1K/day), then $7–56/mo with all features. GreyNoise: free (50/week), then ~$500–3,000+/mo with features gated by tier. SikkerAPI is built for individual developers and small teams. GreyNoise is built for enterprise security budgets.
Yes. SikkerAPI includes a native TAXII 2.1 server with STIX 2.1 indicators, confidence scores, and MITRE ATT&CK references. TAXII feed docs.
Yes. SikkerAPI has a Fail2Ban integration that automatically reports banned IPs. Also: CSF, nginx, and iptables/ipset. GreyNoise integrates with enterprise firewalls (Palo Alto, Cisco) but not Linux firewall tools.
SikkerAPI's confidence scores are evidence-weighted from observed honeypot behavior and credibility-weighted community reports. The scoring algorithm is fully published. Scores reflect what an IP actually did, not just how many times it was reported.
SikkerAPI features verified from source code. GreyNoise features from their API documentation, pricing page, and integrations page. Last updated February 2026.