HailBytes ASM vs Microsoft Defender EASM
A self-hosted EASM alternative for security teams that want recon ownership, multi-cloud deployment, and AI-agent orchestration without lock-in to the Microsoft Defender stack.
TL;DR
Microsoft Defender External Attack Surface Management (the rebranded RiskIQ acquisition) lives inside the Defender stack and bills per discovered asset per day. HailBytes ASM is a self-hosted alternative that deploys on AWS or Azure, prices on infrastructure rather than asset count, and ships with a built-in MCP server for AI-agent orchestration plus white-label output for MSSPs and pen-test firms.
- Pick HailBytes ASM if you want multi-cloud freedom, white-label client deliverables, AI-agent orchestration, or unlimited active scanning at a fixed VM cost.
- Stay with Defender EASM if you’re standardized on Microsoft Defender XDR/Sentinel and want EASM data piped into the same pane of glass with no extra integration.
Pricing & Cost Model
| Dimension | HailBytes ASM | Microsoft Defender EASM |
|---|---|---|
| Pricing axis | Infrastructure ($0.24/vCPU/hour) | Per discovered asset per day (Azure consumption) |
| Annual cost (small surface) | ~$4,200 | ~$4,000–$10,000 |
| Annual cost (mid surface, ~10K assets) | ~$4,200–$8,400 | ~$40,000+ |
| Annual cost (large surface, 50K+ assets) | ~$8,400–$17,000 | $200,000+ |
| Free trial | 30 days via AWS / Azure Marketplace | 30-day Azure free trial |
| Procurement path | AWS or Azure Marketplace (counts toward EDP / MACC) | Azure consumption (MACC drawdown only) |
Defender EASM’s per-asset-per-day model is friendly at low asset counts and turns expensive quickly once discovery expands. HailBytes pricing is flat to VM size.
Architecture & Control
| Dimension | HailBytes ASM | Defender EASM |
|---|---|---|
| Deployment | Self-hosted in your AWS or Azure account | Azure-resident SaaS |
| Source code access | Source-available under ELv2 | Closed source |
| Cloud freedom | AWS, Azure, GovCloud, Azure Gov | Azure only |
| Custom scan logic / wordlists | ✅ Full control | ❌ |
| Per-tenant isolation | One VM per tenant (clean MSSP boundary) | Resource group / workspace-level |
Capability Comparison
| Capability | HailBytes ASM | Defender EASM |
|---|---|---|
| Subdomain enumeration | ✅ Multi-source | ✅ Seed-based discovery |
| Active port & service scanning | ✅ Full | 🟡 Mostly passive |
| CVE matching | ✅ | ✅ |
| Unlimited scans | ✅ | ❌ Per-asset billing |
| Custom wordlists | ✅ Unlimited | ❌ |
| AI-powered analysis | ✅ OpenAI + Ollama (local GPU) | 🟡 Defender XDR Copilot (separate license) |
| MCP server / AI-agent tooling | ✅ Built-in (Claude / Cursor / Windsurf) | ❌ |
| SIEM integration | ✅ Splunk, Sentinel, Elastic, Chronicle | ✅ Sentinel-native, others via connectors |
| Government cloud | ✅ AWS GovCloud + Azure Gov | 🟡 Limited |
| White-label for client deliverables | ✅ Built-in | ❌ |
When HailBytes ASM Wins
- Multi-cloud or AWS-first orgs. Defender EASM is Azure-only; HailBytes runs on either.
- MSSPs and pen-test firms. Fixed per-instance pricing combined with white-label output is what makes resold continuous monitoring profitable.
- You hit per-asset billing pain in Defender EASM. Once discovery expands into thousands of assets, per-asset billing turns punishing.
- AI-agent recon workflows. A built-in MCP server gives Claude, Cursor, and Windsurf direct control of scans and triage without custom glue code.
When Defender EASM Wins
- Pure-Microsoft shops. Native Sentinel ingestion and XDR correlation are real conveniences.
- Azure consumption commits. If you have unspent MACC, Defender EASM consumes against it directly.
- Small, slow-moving surfaces where per-asset pricing is genuinely cheap.
Try HailBytes ASM
The marketplace listings on AWS and Azure each ship with a 30-day trial that includes the VM.
Related Comparisons
Other vendor-bundled and best-of-breed EASM platforms usually evaluated alongside Defender EASM:
- vs CrowdStrike Falcon Surface — Falcon-bundled EASM.
- vs Cortex Xpanse — Palo Alto enterprise EASM.
- vs Detectify — SaaS web-app surface monitoring.
- vs Censys — internet-wide certificate and port intelligence.
- Full ASM comparison matrix — every vendor side by side, plus the HailBytes ASM product page.
See HailBytes ASM in Action
Skip the slide deck. Watch the product run end-to-end before you book a call.
Try HailBytes ASM Free
Get a free trial deployment on AWS or Azure. Our team will walk you through setup and help you run your first reconnaissance scan within 30 minutes.
- ✓ 30-day free trial on AWS or Azure
- ✓ Guided onboarding from our security team
- ✓ No credit card required to start
- ✓ 30+ security tools pre-configured