HEAD-TO-HEAD · FACTS ONLY
Censys vs Tenable ASM: exposure management facts side by side
SHORT ANSWER
Censys describes 3 of the five tool types on the pages we read and Tenable ASM describes 4; they differ on exposure management platforms. On proof, Censys describes exploitability checks but not attack-style testing and Tenable ASM describes exploitability checks but not attack-style testing. We do not score either; the right choice depends on your estate, current platform, WAFs and capacity to fix.
By The Exposure Desk · Exposure Management Finder · Published 2026-10-11
Desk research from public vendor pages read in September 2026, updated 2026-10-11. Profiles follow our published method; we did not run the products.
How do their shapes compare?
- Censys ASM
- Tenable Attack Surface Management
- Outer point: described on the vendor's pages we read
- Inner point: not in our sources (it may exist; we did not find it)
What are the facts, side by side?
| Fact | Censys ASM | Tenable Attack Surface Management |
|---|---|---|
| Positioning | Censys's external exposure management product, built on first-party scanning of all 65K ports and the Censys Internet Map. | Tenable's attack surface management, part of the Tenable One exposure management platform, drawing on an attack surface map of more than 5 billion assets. |
| Deployment | Discovery expands from seeds the customer adds in the console or through the API; assets found beyond the seeds appear under a Found by Censys tab. Source: Censys docs: seed your attack surface · Read 27 Sep 2026 | Part of Tenable One; sold through a demo request. Source: Tenable Attack Surface Management · Read 27 Sep 2026 |
| EASM discovery | Described First-party scanning across all 65K ports finds services on nonstandard ports and hosts with self-signed certificates. Source: Censys external exposure management · Read 27 Sep 2026 | Described Identifies domains related to your inventory from a map of 5 billion+ assets, with 200+ metadata fields. Source: Tenable Attack Surface Management · Read 27 Sep 2026 |
| Exposure validation | Described Confirms reachability and applies EPSS and KEV; active exploitation testing is not described. Source: Censys external exposure management · Read 27 Sep 2026 | Described Tenable One adds attack path analysis across 150+ techniques; exploit testing is not described for the ASM product. Source: Tenable One · Read 27 Sep 2026 |
| Exposure management platformsDiffers | Not in our sources | Described Feeds Tenable One, which Tenable calls its exposure management platform, with Tenable One Connectors for third-party data. Source: Tenable One · Read 27 Sep 2026 |
| CTEM programme support | Described Discovery, prioritisation with EPSS and KEV, rapid response alerts and remediation tasks; exploit validation is not described. Source: Censys external exposure management · Read 27 Sep 2026 | Described Tenable One covers discovery, attack paths and Hexa AI automated remediation workflows; exploit validation is not described. Source: Tenable One · Read 27 Sep 2026 |
| WAF posture | Not in our sources | Not in our sources |
| Subsidiary and owner attribution | Not in our sources | Not in our sources |
| Internal as well as external assetsDiffers | Not in our sources | Matches Tenable One includes vulnerability management alongside external attack surface data. Source: Tenable: buy · Read 27 Sep 2026 |
| Cloud connections namedDiffers | Matches Names AWS, Google Cloud and Azure among its integrations. Source: Censys integrations · Read 27 Sep 2026 | Not in our sources |
| Exploitability checked | Partly Reachability confirmation and EPSS and KEV scoring, not exploitation. Source: Censys external exposure management · Read 27 Sep 2026 | Partly Attack path analysis across 150+ techniques in Tenable One, not exploit testing. Source: Tenable One · Read 27 Sep 2026 |
| Attack-style testing | Not in our sources | Not in our sources |
| Works through your WAF or edge | Not in our sources | Not in our sources |
| WAF coverage across several vendors | Not in our sources | Not in our sources |
| Retests after a fix | Not in our sources | Not in our sources |
| Routes findings to owners and ticketsDiffers | Matches Auto-creates, routes and tracks remediation tasks. Source: Censys external exposure management · Read 27 Sep 2026 | Partly Tenable One Advanced lists orchestrated remediation through manual or automated ticketing workflows. Source: Tenable One pricing · Read 11 Oct 2026 |
| Applies a compensating controlDiffers | Not in our sources | Partly Hexa AI orchestrates automated remediation in Tenable One. Source: Tenable One · Read 27 Sep 2026 |
| Price or pricing basis publishedDiffers | Partly ASM is contact sales; a free platform account exists and credits start at $100. Source: Censys pricing · Read 27 Sep 2026 | Not in our sources |
| Trial or self-serve startDiffers | Partly A free Censys platform account exists; ASM itself is sold through sales. Source: Censys pricing · Read 27 Sep 2026 | Not in our sources |
| Platform it extends | None | External findings feed Tenable One next to Tenable vulnerability data. Source: Tenable One · Read 27 Sep 2026 |
| Integrations | Webex, Slack, Jira, ServiceNow ITSM, Tenable VM, Google Security Operations, Microsoft Sentinel, ServiceNow CMDB, Axonius, Brinqa, AWS, Google Cloud and Azure. Source: Censys integrations · Read 27 Sep 2026 | Tenable One Connectors bring third-party data into the platform. Source: Tenable One · Read 27 Sep 2026 |
| Price | ASM: contact sales. A free Censys platform account exists, and credits start at $100. Source: Censys pricing · Read 27 Sep 2026 | Not published. Tenable One is sold in two packages, Foundation and Advanced, both by quote; ASM is not sold online. Tenable publishes some adjacent prices, for example Tenable One Vulnerability Management at $3,700 for one year for up to 250 assets. Source: Tenable One pricing · Read 11 Oct 2026 |
Where do they differ?
- Exposure management platforms: Censys is not in our sources; Tenable ASM describes it.
- Internal as well as external assets: Censys is not in our sources; Tenable ASM matches.
- Cloud connections named: Censys matches; Tenable ASM is not in our sources.
- Routes findings to owners and tickets: Censys matches; Tenable ASM partly matches.
- Applies a compensating control: Censys is not in our sources; Tenable ASM partly matches.
- Price or pricing basis published: Censys partly matches; Tenable ASM is not in our sources.
- Trial or self-serve start: Censys partly matches; Tenable ASM is not in our sources.
Choose Censys if
- Your team hunts threats and wants raw internet scan evidence
- You need findings in ServiceNow CMDB, Microsoft Sentinel or Tenable VM
Choose Tenable ASM if
- You already run Tenable vulnerability management
- You want external findings in the same platform as internal vulnerabilities
Which limits should you check?
Censys
- Discovery starts from seeds you supply.
- No exploit validation or mitigation is described on the pages we read.
Tenable ASM
- ASM is quote-only, with no trial listed.
- Exploit testing is not described, and remediation depends on buying into Tenable One.
Questions readers ask
Is Censys or Tenable ASM better?
Neither is scored on this site. Censys describes 3 of five tool types and Tenable ASM 4 on the pages we read, and they differ on 7 recorded facts. Which fits depends on your estate, current platform, need for proof, WAFs and capacity to fix; the finder checks those.
Which of the two proves exploitability?
Censys: exploitability checked: Partly; attack-style testing: Not in our sources. Tenable ASM: exploitability checked: Partly; attack-style testing: Not in our sources.
Do Censys or Tenable ASM publish prices?
Censys: ASM: contact sales. A free Censys platform account exists, and credits start at $100. Tenable ASM: Not published. Tenable One is sold in two packages, Foundation and Advanced, both by quote; ASM is not sold online. Tenable publishes some adjacent prices, for example Tenable One Vulnerability Management at $3,700 for one year for up to 250 assets.