
Founder note
Investigation work is rarely limited by a lack of information. The harder problem is keeping sources, reasoning, uncertainty, and review connected as a case develops.
Yuhao Jian, founder and solo operator
Phantom Helix
Melbourne, Australia
01
Investigations become difficult when sources, documents, identities, relationships, and dates accumulate faster than a team can preserve why each detail matters.
The work spreads across tabs, files, tools, notes, and reports. Soon the investigator spends as much time reconstructing context and checking prior reasoning as finding the next supported lead.
02
SIERRA was built as a local-first workspace for investigators working the live case: connecting evidence, entities, chronology, notes, and tool output without losing control of the working material.
Phantom Agent handles the research groundwork: give it the question, review the sources and findings, then decide where the investigation goes next. Neither product replaces professional judgment.
03
Phantom Helix is being built for investigators, analysts, OSINT researchers, fraud teams, and due-diligence practitioners whose recurring work moves between people, organizations, assets, disputes, infrastructure, and public records.
The tools earn their place when evidence must remain traceable, uncertainty must stay visible, and another professional needs enough source context to review or continue the work.
Working standard
The point is not to automate a conclusion or decorate a graph. It is to preserve enough context for the work to be understood, challenged, revisited, and handed over.
01
Keep claims next to sources
A finding should remain connected to the material and source scope that support it.
02
Separate findings from leads
Supported findings, candidate pivots, blocked checks, and open questions should stay distinct.
03
Keep context attached
Entities, relationships, dates, notes, and tool output should remain understandable together.
04
Make review possible
Another investigator should be able to inspect the evidence, challenge the reasoning, and continue the work.
Why it matters
I have seen how much clear information and real community support can matter when people are under pressure.
I want useful investigative tooling to be available to professional teams that cannot justify extremely expensive software. SIERRA and Phantom Agent are two ways I am testing that goal.
Real workflow feedback
Feedback from recurring investigation workflows is more useful than a generic feature list. Explain where source collection, review, or deliverable preparation still breaks.
Choose the next step
Use SIERRA when you need to work the live case locally. Use Phantom Agent when you want the public-source research gathered and organized before your team takes over.
Download SIERRAExplore Phantom AgentIn silence, patterns emerge.
Investigation tools for professional teams that need to keep the sources, reasoning, and next steps together.
© 2026 Phantom Helix · Operated by Yuhao Jian · ABN 52 512 969 796
Built in Melbourne for professional investigation work.