In one paragraph
Cotool and Nebulock both appear in this guide's vendor directory. Both vendors' own material describes Level 3, Continuous hunting, human review. Both state 4 of the twelve capabilities in our matrix. Cotool states states MCP support where Nebulock does not; Nebulock states queries data where it already lives, new rules tested on historical data before release and publishes an open framework or specification where Cotool does not. This guide does not pick a winner; which differences matter depends on your must-haves.
Guide updated September 2026 · Autonomous Threat Hunting editors
Where do Cotool and Nebulock differ?
Cotool states, Nebulock does not publish
- States MCP support: Custom MCP listed among integrations.
Nebulock states, Cotool does not publish
- Queries data where it already lives: Helix federated search "to get data just-in-time, not just-in-case".
- New rules tested on historical data before release: "Every detection rule must pass a Retrohunt before deployment."
- Publishes an open framework or specification: Agentic Threat Hunting Framework and Agentic Detection Engineering Framework on GitHub, MIT license.
Both state
Hunts start without a per-hunt request, Detection changes kept in version control, Maps hunts or detections to MITRE ATT&CK, Names its intelligence sources
Neither states
Findings arrive with corroboration or shown working, Response actions staged for human approval, States a security attestation, Publishes a list price
How do they compare row by row?
| Capability | Cotool | Nebulock | Difference |
|---|---|---|---|
| Hunts start without a per-hunt request | StatedAgents gather intel from the web, check relevance to the environment and propose detections. | Stated"Vespyr hunts without a directive." | Both state it |
| Queries data where it already lives | Not publishedWorks through 40+ native integrations; whether data is queried in place or copied is not stated on the pages reviewed. | StatedHelix federated search "to get data just-in-time, not just-in-case". | Only Nebulock states it |
| New rules tested on historical data before release | Not publishedHow proposed detections are approved before deployment is not published. | Stated"Every detection rule must pass a Retrohunt before deployment." | Only Nebulock states it |
| Detection changes kept in version control | StatedCompatible with existing detection-as-code infrastructure; agent version control. | StatedRules exported to GitHub, with immutable version history, compare and revert. | Both state it |
| Findings arrive with corroboration or shown working | Not publishedNot described on the pages reviewed. | Partly statedThe LOCK framework includes a Check step; how findings are presented is not detailed. | Neither states it |
| Response actions staged for human approval | Partly statedDescribes Respond automation; approval steps are not described in detail. | Not publishedResponse actions are not published. | Neither states it |
| Maps hunts or detections to MITRE ATT&CK | StatedMaps the detection suite across sources onto MITRE ATT&CK to surface gaps. | StatedThe Learn step starts with a hypothesis mapped to MITRE ATT&CK. | Both state it |
| Names its intelligence sources | StatedAgents crawl the web for intel; custom intel sources including STIX/TAXII. | StatedIntel from CrowdStrike, Mandiant, MISP and community feeds. | Both state it |
| Publishes an open framework or specification | Not publishedNone found on the pages reviewed. | StatedAgentic Threat Hunting Framework and Agentic Detection Engineering Framework on GitHub, MIT license. | Only Nebulock states it |
| States MCP support | StatedCustom MCP listed among integrations. | Not publishedNot stated on the pages reviewed. | Only Cotool states it |
| States a security attestation | Not publishedNot found on the pages reviewed. | Not publishedNot found on the pages reviewed. | Neither states it |
| Publishes a list price | Not publishedNo list price on the pages reviewed. | Not publishedNo list price on the pages reviewed. | Neither states it |
What does each publish about pricing?
| Cotool | No list price on the pages reviewed. |
|---|---|
| Nebulock | No list price on the pages reviewed. |
Neither vendor publishes a list price on the pages reviewed. Ask each for a written price basis and budget separately for query compute on your data platforms.
Where does each run, and what controls does it describe?
Cotool
- Works through integrations; the detect page states 40+ native integrations and compatibility with existing detection-as-code infrastructure.
- Integrations named include CrowdStrike, Microsoft Defender, SentinelOne, Okta, Code42, Kandji, Splunk, Datadog, Panther, Snowflake, Databricks, incident.io, Jira, Linear, TheHive, Tines, VirusTotal, AbuseIPDB, GreyNoise, urlscan, Socket, Slack and Microsoft Teams; custom MCP.
- Custom intel sources including STIX/TAXII.
- Agent version control. Approval steps for proposed detections are not described in detail.
Nebulock
- SaaS. Helix federated search "to get data just-in-time, not just-in-case".
- Integrations: Okta, Microsoft Entra, Duo, CrowdStrike, Microsoft Defender, SentinelOne, AWS CloudTrail, Microsoft Event Hub, Microsoft Sentinel, vulnerability tools (beta), Jamf, Slack, Microsoft Teams, Tines, Jira, GitHub.
- Intel from CrowdStrike, Mandiant, MISP and community feeds.
- "Every detection rule must pass a Retrohunt before deployment."
- Rules edited via chat or direct SQL, exported to GitHub, with immutable version history, compare and revert.
Which should you look at first?
Look at Cotool first if your must-haves include states MCP support.
Look at Nebulock first if your must-haves include queries data where it already lives or new rules tested on historical data before release.
Either way, put both through the same trial questions, and try the calculator with your own must-haves.
Frequently asked questions
Is Cotool better than Nebulock?
Do Cotool and Nebulock query data in place?
Do Cotool and Nebulock publish pricing?
Cotool alternatives · Nebulock alternatives · Open this pair in the side-by-side view · Directory entry for Cotool · Directory entry for Nebulock