IntelGraph is an open-source threat intelligence platform that correlates IOCs across multiple intelligence feeds, resolves conflicting data, and explains why every alert was generated. It automatically ingests data from URLhaus, CISA KEV, OTX, Shodan, and VirusTotal, builds a knowledge graph of relationships between IPs, domains, and CVEs, supports STIX 2.1/TAXII 2.1 export for SIEM integration, and includes automated response playbooks.