Installation
Download the native desktop app for hardware-accelerated reconciliation and production audits. The website is for marketing, docs, and demo booking only.
Overview
Website
Public site for product information, documentation, and booking demos. It is not a production audit runtime.
Desktop App
Native Rust engine with GPU Bloom filters, direct local file streaming, and no file size limits.
Excel Add-in
Run STET directly inside Microsoft Excel. Highlights discrepant rows, opens evidence documents, and exports findings — no separate app needed.
Note
Download
Desktop builds are currently invite-only
The Windows and macOS installers are distributed directly. Book a demo to discuss your use case and get access.
Windows
Desktop ships as a signed NSIS setup: .exe (file name like STET_0.3.5_x64-setup.exe). Run the setup wizard — STET installs to %APPDATA%\STET.
Warning
macOS
macOS desktop builds ship as a signed .dmg. Drag STET.app to your Applications folder.
On first open, macOS Gatekeeper may block the app. Run the following to clear the quarantine flag:
xattr -dr com.apple.quarantine /Applications/STET.appExcel Add-in
The STET Excel add-in installs a task pane directly inside Microsoft Excel. After running an audit you can jump to discrepant rows, highlight them by severity, open the source evidence document (PDF, XLSX, PPTX, CSV), and copy a full findings report to the clipboard — all without leaving your spreadsheet.
Requirements
- Microsoft Excel 2016 or later (Microsoft 365 recommended) — Windows only
- Node.js LTS — required for the audit engine host
- .NET Framework 4.7.2 or later (ships with Windows 10 / 11)
Install Steps
Download the Excel Add-in package
The .zip package contains the XLL add-in, engine host, and installer script — no admin rights required.
Desktop builds are available by request. Book a demo to get access.
Run the installer
Extract the ZIP, then right-click install-excel-addin.ps1 and choose Run with PowerShell. Or paste this one-liner into PowerShell from the extracted folder:
powershell -ExecutionPolicy Bypass -File install-excel-addin.ps1The installer copies files to %LOCALAPPDATA%\STET\ExcelAddIn and registers the XLL in the Excel registry (HKCU — no admin needed).
Restart Excel
Close and reopen Excel. A new STET menu will appear in the ribbon. Click STET → Show STET Panel to open the audit task pane on the right side.
Run your first audit
In the STET panel: pick your data room folder, select the ledger sheet (the active sheet is auto-selected), and click ▶ Run Audit. Findings stream in as the engine processes your files.
Review discrepancies
Each discrepancy shows severity, the Excel row number, and a summary. Use the action buttons to:
- ↗ Jump to Row — navigates and highlights the discrepant ledger row
- 📄 Open Doc — opens the source evidence file in your default viewer
- 📋 Copy — copies the selected finding to clipboard
- 🎨 Highlight All — colour-codes every discrepant row by severity (red / orange / yellow / green)
- 📋 Copy Report — exports all findings as CSV to clipboard
Note
powershell -ExecutionPolicy Bypass -File install-excel-addin.ps1 -UninstallFirst Launch
Sign In
Log in with your STET account. Your session is stored locally — you won't need to sign in again on the same machine.
Navigate to Evidence Ingest
Click Evidence Ingest in the sidebar. The desktop app adds a Local Sync option that lets you point directly to a folder on disk — no cloud upload required.
Select a Local Data Room Folder
Click Select Folder and choose the root of your downloaded data room. STET scans all supported file types (pdf xlsx xls pptx csv txt) and streams them through the native Rust engine.
Upload Your Ledger and Start
Upload your reference ledger (CSV or Excel) and click Start Audit. The GPU-accelerated pipeline runs locally and streams matches in real time.