Local-first investigation workspace
SIERRA
Keep a live case understandable as it grows.
Bring evidence, entities, relationships, chronology, notes, and tool output into one investigator-owned workspace.
Free desktop app
Local .SRAS case files
Optional cloud execution
Free desktop app
Local .SRAS case files
Optional cloud execution
One case / four moments
01 / 04
Capture
Begin with what you know.
Write the first lead in plain Markdown, then add entities, files, and relationships as the case takes shape.
Fictional case / SIERRA desktop interface
Capture
One case / four moments
Follow the work without losing the thread.
Capture
01 / 04
Begin with what you know.
Write the first lead in plain Markdown, then add entities, files, and relationships as the case takes shape.
Investigate
02 / 04
Run tools from the evidence.
Run a local or cloud invoker from the node under review. The question and its source stay together.
Context
03 / 04
Results return to their source.
Tool output lands beside the lead that produced it, preserving the path through the case.
Assist
04 / 04
Ask with the live case attached.
Through MCP, an AI assistant can read the active graph before suggesting the next step. The analyst stays in control.
Fictional case / SIERRA desktop interface
Local first
Your working case stays yours.
The case stays on your machine. You choose when tools or assistants connect.
- Case file
- Local by default
- Graph, notes, attachments, chronology, and viewport stay together in one .SRAS file.
- Tools
- Execution is a choice
- Run invokers locally. Add SIERRA Cloud only when remote execution is useful.
- Assistants
- Context stays visible
- Through MCP, an external AI can read the active graph before suggesting changes.
- Handoff
- Move the work, not just a screenshot
- Reopen the .SRAS file in SIERRA, or export the graph to Obsidian.
Meridian case
MERIDIAN.SRAS / LOCAL
Chronology
Relationships make more sense when time stays attached.
Attach point or range dates to entities and connections. Time stays with the graph when the case moves.
Built for live cases
For work that keeps changing shape.
SIERRA is most useful when each new lead changes how the rest of the case should be understood.
Responsible use
Lawful, authorized use only. Demos are fictional; users are responsible for permissions and compliance. Details.
OSINT and threat research
Map infrastructure, identities, sources, and pivots across a live investigation.
Fraud and due diligence
Keep counterparties, transactions, chronology, and supporting material connected.
Independent and legal investigations
Build a working case file that can be revisited, explained, and handed over.
Responsible use
Lawful, authorized use only. Demos are fictional; users are responsible for permissions and compliance. Details.
Before the live case
Want the research groundwork already organized?
Give Phantom Agent the research question in its web workspace. Review what it found, which sources it reached, and what remains open. Then move into SIERRA when the investigator needs to challenge the findings and develop the live case locally.
Start locally
Start with one live case.
The SIERRA desktop app and its local workspace are free. Add cloud execution only when the investigation needs it.