Filigran OpenCTI vs isMalicious Threat Intelligence: Side-by-Side Comparison (2026)

Filigran OpenCTI: Open-source threat intelligence platform for organizing and operationalizing CTI. built by Filigran. Core capabilities include STIX 2.1 data model for threat intelligence structuring, Knowledge hypergraph with visual graphs and timelines, MITRE ATT&CK framework mapping..

isMalicious Threat Intelligence: Threat intelligence database with 500M+ malicious IPs, domains, and IOCs via API. built by isMalicious. Core capabilities include Threat intelligence database with 500M+ malicious IPs, domains, and hashes, Multi-source aggregation from VirusTotal, Shodan, GreyNoise, AbuseIPDB, AlienVault, AI-powered threat summaries with LLM-generated analysis..

Both serve the Threat Intel Platforms market but differ in approach, feature depth, and target audience.

Filigran OpenCTI differentiates with STIX 2.1 data model for threat intelligence structuring, Knowledge hypergraph with visual graphs and timelines, MITRE ATT&CK framework mapping. isMalicious Threat Intelligence differentiates with Threat intelligence database with 500M+ malicious IPs, domains, and hashes, Multi-source aggregation from VirusTotal, Shodan, GreyNoise, AbuseIPDB, AlienVault, AI-powered threat summaries with LLM-generated analysis.

Filigran OpenCTI is developed by Filigran. isMalicious Threat Intelligence is developed by isMalicious. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Filigran OpenCTI and isMalicious Threat Intelligence serve similar Threat Intel Platforms use cases: both are Threat Intel Platforms tools, both cover MITRE Attack, Cyber Threat Intelligence. Review the feature comparison above to determine which fits your requirements.