Querithm

A modern, offline-first desktop SQL IDE for SQL Server and PostgreSQL.
Instant AST autocomplete, 1M-row Apache Arrow grids, and credentials kept strictly in your OS keyring.

Download

Windows, macOS and Linux

Windows

Windows 10 or 11, 64-bit

macOS

Apple Silicon and Intel

Linux

x86-64, WebKitGTK 4.1

prd-sql-01 · SalesDB

1WITH RegionalSales AS (
2  SELECT o.CustomerId, SUM(o.TotalAmount) AS AnnualSpend, COUNT(*) AS OrderCount
3  FROM dbo.Orders o WHERE o.OrderDate >= '2026-01-01' GROUP BY o.CustomerId
4)
5SELECT r.CustomerId, r.AnnualSpend, r. FROM RegionalSales r ORDER BY r.AnnualSpend DESC;

                  column
                  OrderCount
                  int · RegionalSales CTE
                

                  column
                  AnnualSpend
                  decimal(19,4) · RegionalSales CTE
                

Results · Apache Arrow Stream 1,000,000 rows · 229 ms

#CustomerIdRegionOrderCountAnnualSpendStatus

1CUST-09481North America1,420$284,910.00Verified

2CUST-03192Europe West980$192,400.50Verified

3CUST-07740Asia Pacific845$164,120.75Streaming

Measured performance

Verified on SQL Server 2022 & PostgreSQL 16 (600 tables, 400 procedures, 12,023-line proc, 1M-row query).

5.9 ms target ≤ 16 ms

Typing latency (p95) in 12k-line procedure

37.4 ms target ≤ 150 ms

Tier-2 ScriptDom AST completion (p95)

229 ms target ≤ 300 ms

1M-row query: first Arrow batch painted

1.25 s target ≤ 1.50 s

Cold start to interactive editor

54.6 ms target ≤ 100 ms

Full AST diagnostics on 12k-line procedure

1.9 ms 1 roundtrip

SQL Server live database switch overhead

First launch & verification

The installers are not code-signed yet, so your OS will ask you to confirm once.

Windows: “Windows protected your PC”

Click More info, then Run anyway.

macOS: “Querithm can’t be opened”

Open the .dmg and drag Querithm to Applications.
Open Querithm once and close the warning.
Go to System Settings → Privacy & Security, scroll down and click Open Anyway.

If macOS says the app “is damaged”, run this in Terminal, then open it again:

xattr -dr com.apple.quarantine /Applications/Querithm.app

Linux: AppImage and packages

chmod +x Querithm-linux-x64.AppImage
./Querithm-linux-x64.AppImage

sudo apt install ./Querithm-linux-x64.deb   # Debian / Ubuntu
sudo dnf install ./Querithm-linux-x64.rpm   # Fedora / RHEL

Verify your download (SHA-256)

Every release has a SHA256SUMS.txt. Compare it with:

sha256sum Querithm-*                     # Linux
shasum -a 256 Querithm-*                 # macOS
Get-FileHash .\Querithm-windows-x64-setup.exe   # Windows PowerShell