Free network diagnostic tools for DNS, IP, email and SSL checks
Open-source toolkit for building, simulating, and deploying business process diagrams with code and AI
Stage
Not given
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Founded
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Based in
IN
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Pricing model
Freemium
Open source
Pricing
Free plan: All 41 tools with unlimited checks, 3 saved domains with daily monitoring, 7 days of history. Pro plan: $29/month for 50 domains, scans every 6 hours, email, Slack, Telegram and webhook alerts, 12 months of history and API access.
Free, MIT-licensed
Key features
DNS Lookup - resolve A, AAAA, MX, TXT, NS, CNAME records
Blacklist Checker - query 7 major DNS blocklists
SSL/TLS Certificate Checker - verify certificate chain, expiry and protocol support
Email Deliverability - check SPF, DKIM and DMARC records
WHOIS Lookup - query domain registration details
Reverse DNS (PTR) - check IP to hostname resolution
Port Checker - test common HTTP/HTTPS ports
BIMI Lookup - query BIMI TXT records
Domain monitoring with automated scans
Multi-channel alerts via email, Slack, Telegram and webhooks
Fluent TypeScript API for BPMN authoring
Automatic layout with Sugiyama engine
Type-safe element guards
Roundtrip fidelity preserving extensions
Zero third-party dependencies
DMN decision table builder
Camunda form generation
In-process BPMN simulator
LLM-friendly compact format
Camunda 8 REST client with 180 methods
What makes it different
41 tools all available free with unlimited checks
Clear sourcing - every result shows its source and what was not tested
Live DNS queries from edge servers via DNS-over-HTTPS
Domain monitoring and alerts with affordable Pro plan at $29/month
Write BPMN diagrams as code with 13 lines of TypeScript instead of 41 lines of XML
Works across browsers, Node, Deno, Bun and edge runtimes with no dependencies
Direct Camunda 8 deployment with OpenAPI connector generation
AI-friendly format for LLM-driven diagram generation
The Network Tools
BPMN Kit