HailBytes ASM vs Tenable ASM
A self-hosted EASM alternative for teams that want active recon ownership instead of a passive discovery layer bolted onto a vulnerability-management suite.
TL;DR
Tenable Attack Surface Management (the Bit Discovery acquisition, sold inside Tenable One) is primarily a passive external-asset discovery layer that feeds Tenable’s vulnerability scanners. HailBytes ASM is a self-hosted alternative that owns both discovery and active scanning end-to-end, priced on infrastructure rather than as a Tenable One module.
- Pick HailBytes ASM if you don’t want a Tenable One commitment, need active scan ownership and white-label deliverables, or want unlimited scans at a flat VM cost.
- Stay with Tenable ASM if you’re already standardized on Tenable Vulnerability Management / Nessus and want EASM data piped into the same risk dashboard.
Pricing & Cost Model
| Dimension | HailBytes ASM | Tenable ASM |
|---|---|---|
| Pricing axis | Infrastructure ($0.24/vCPU/hour) | Per asset / per Tenable One subscription tier |
| Annual cost (small surface) | ~$4,200 | ~$15,000+ (Tenable One floor) |
| Annual cost (mid surface) | ~$4,200–$8,400 | $40,000–$100,000+ |
| Standalone purchase | ✅ | 🟡 Typically bundled in Tenable One |
| Free trial | 30 days via AWS / Azure Marketplace | 30-day Tenable One trial |
| Procurement path | Cloud marketplace (counts toward EDP / MACC) | Direct Tenable contract |
Architecture & Control
| Dimension | HailBytes ASM | Tenable ASM |
|---|---|---|
| Deployment | Self-hosted in your AWS / Azure account | SaaS (Tenable-hosted) |
| Source code access | Source-available under ELv2 | Closed source |
| Data residency | Whatever cloud region you pick | Tenable-controlled regions |
| Custom scan logic / wordlists | ✅ Full control | ❌ |
| Per-tenant isolation | One VM per tenant | Multi-tenant SaaS |
Capability Comparison
| Capability | HailBytes ASM | Tenable ASM |
|---|---|---|
| External asset discovery | ✅ Active recon pipeline | ✅ Passive (Bit Discovery dataset) |
| Active port & service scanning | ✅ Built-in | 🟡 Requires Tenable VM/Nessus pivot |
| CVE matching | ✅ | ✅ (Nessus engine) |
| Vulnerability-management depth | 🟡 OSS toolchain breadth | ✅ Nessus is the mature engine |
| Unlimited scans | ✅ | 🟡 Tier-based |
| Custom wordlists | ✅ Unlimited | ❌ |
| AI-powered analysis | ✅ OpenAI + Ollama (local GPU) | 🟡 ExposureAI (Tenable One add-on) |
| MCP server / AI-agent tooling | ✅ Built-in (Claude / Cursor / Windsurf) | ❌ |
| SIEM integration | ✅ Splunk, Sentinel, Elastic, Chronicle | ✅ Tenable connectors |
| Government cloud (GovCloud / Azure Gov) | ✅ Both | 🟡 Tenable.io for Gov |
| White-label for client deliverables | ✅ Built-in | ❌ |
When HailBytes ASM Wins
- You don’t want a Tenable One commitment. Tenable ASM’s value is feeding the broader Tenable VM stack; standalone, the math gets harder.
- MSSPs and pen-test firms. White-label deliverables and per-instance cost make resold continuous monitoring viable. Reselling continuous ASM.
- Active recon ownership. If you want to own the scan pipeline, custom wordlists, and triage logic end-to-end, self-hosting wins.
- AI-agent recon workflows. The built-in MCP server lets Claude, Cursor, and Windsurf drive scans and triage findings.
When Tenable ASM Wins
- Heavy Tenable VM / Nessus shops. Native Tenable One correlation is the real product moat.
- Vulnerability-management depth is the priority. Nessus has decades of detection authoring; pure recon-tooling won’t match that on every CVE class.
- Existing Tenable contract spend that absorbs the ASM SKU at marginal cost.
Try HailBytes ASM
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