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Nexus
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Nexus · project software for Windows 11

Projects in hand. Data in house.

Nexus PM keeps projects, tasks and whiteboards in one file on your computer. Nexus Circle lets one AI work and a second one check. Bought once, never rented.

Try it for freeSee Nexus Circle
  • From 299 € net, once
  • One file on your computer
  • No account, no time limit
Nexus PM: dashboard with progress across all projects and the activity log.
Nexus PM: project list with three project cards.
Nexus PM: task list of a demo project with seven tasks.
Nexus PM: whiteboard of a demo project with notes and the task chain.
Nexus Circle: the ring with five steps, Codex judges read-only, Cursor waits.
Rent or own

Rent keeps running. Nexus is yours.

12 € per person and month is what the most affordable German provider with data sovereignty charged in August 2026, with the data on its servers. You buy Nexus PM once. One person, five years:

  • Rent, 12 € a month720 €
  • Nexus PM with updates598 €
  • Nexus PM without updates299 €

Net, one person, after five years. The table works out every year.

Cost for one person, net
AfterRent, 12 € a monthNexus PM without updatesNexus PM with updates
1 year144 €299 €299 €
2 years288 €299 €373.75 €
3 years432 €299 €448.50 €
5 years720 €299 €598.00 €

Rent: market review of 22 August 2026. Updates from the second year are optional: 25 percent of 299 €, i.e. 74.75 € a year. Without them Nexus PM simply keeps running.

Nexus PM

The whole picture. In one program.

Where every project stands, what is due today, who said what. All pictures: screenshots of the program with demo data.

Nexus PM: project list with three project cards.

Projects at a glance

Every project is a card: status, progress, the view you left it in. One click and you are back where you stopped.

Nexus PM: dashboard with progress across all projects and the activity log.

The dashboard

One line says whether everything is green: nothing overdue, every project staffed. Below it the progress across everything and who did what, when.

Nexus PM: task list of a demo project with seven tasks.

Tasks as list, board or calendar

One line is enough: priority, due date, assignee. Every task knows its state, from open to done.

Nexus PM: whiteboard of a demo project with notes and the task chain.

A whiteboard per project

Notes in six colours, the task chain top left. Thinking and planning in one place.

Nexus PM: task window with the Nexus Circle report.

Discussion and report inside the task

Six tabs per task: details, plan, discussion, files, time, AI. The Nexus Circle report lands right here.

1

One file. Your computer.

Everything in one file on your computer. No account with us, no mandatory cloud. Backing up means copying a file.

Nexus PM 2.5.3 with demo data, captured on 14 October 2026.

Nexus Circle

One AI builds. The second one checks.

Nexus Circle takes tasks from Nexus PM, lets Codex implement them, runs build and tests itself and has Cursor check along. Done means: tests green and both AIs agree.

  1. 01

    Clarify the goal

    Goal and acceptance before anything is touched. Codex only reads.

  2. 02

    Implement

    Codex changes the source code, inside the project folder only. Nexus Circle backs up the source files first.

  3. 03

    Verify

    The project build and tests, started by Nexus Circle itself, without AI. No AI can simply claim that everything is green.

  4. 04

    Judge

    Codex and Cursor judge at the same time and independently. Cursor only reads; if a file changes, the run stops.

  5. 05

    Report

    Back into the same task in Nexus PM. No second task list.

Nexus Circle, redrawn: the ring with five steps, Codex and Cursor, Nexus PM, project folder and checks. Nexus Circle OllamaClaudeCodexCursorChatGPT Nexus PMProject folderChecks Clarify the goalGoal and acceptanceImplementChange the codeVerifyBuild and testsJudgeCritical reviewReportInto the same task
To Codex: clarify the goal
What
Beträge deutsch anzeigen
How
read only
Where
kassenbuch-scan
To Codex: implement
What
Beträge deutsch anzeigen
How
change the code, inside the project folder only
Where
kassenbuch-scan
Nexus Circle

Starts the project build and tests itself. No AI involved.

To Codex: judge
What
Beträge deutsch anzeigen
How
read only
Where
kassenbuch-scan
Report in the task
State
done
Checks
passed
Codex, Cursor
ready
Cursor

The implementation demonstrably meets the acceptance criteria. euro in src/kassenbuch.mjs checks with Number.isInteger and builds the output locally and independently from sign, thousands separators, decimal comma and two cent digits.

Clarifying the goal · Beträge deutsch anzeigenImplementing · Beträge deutsch anzeigenVerifying · build · testJudging · Beträge deutsch anzeigenDone · report is in the task

Nexus Circle: to Codex, read-only: “show amounts in German format”. Clarify the goal, the next implementation step and verifiable acceptance criteria. Change no files.Nexus Circle: source files backed up. To Codex: implement “show amounts in German format”, inside the project folder kassenbuch-scan only.Nexus Circle starts the project build and tests itself. No AI can claim that everything is green.Nexus Circle: to Codex, read-only: “show amounts in German format”. Check critically whether the task is fulfilled, based on the changes and the independent check results. Change no files.Nexus Circle: checks passed, Codex and Cursor agree. The report sits in the same task in Nexus PM.

Redrawn after the run with Codex and Cursor (Nexus Circle 0.7.0, task “show amounts in German format”). Not a screen recording; the real screenshots sit below the steps.

3/3tasks done in the first complete run, each at the first attempt3 October 2026, test project Kassenbuch, Nexus Circle 0.6.1
8 Min.from start to “done” in that run3 October 2026, 22:23 to 22:31
2/2tasks in the run with Codex and Cursor, each “ready” from both3 October 2026, Nexus Circle 0.7.0

This is what it really looks like: six screenshots of the program, unedited.

Nexus Circle: handover from Nexus PM, project Kassenbuch, 0 of 7 tasks transferred.
Handover from Nexus PM. Nexus Circle fetches the tasks of the Kassenbuch project; the project folder is still open.
Nexus Circle: task selection, one of four open tasks chosen, prerequisites first.
Choosing tasks. One of four open tasks is ticked; prerequisites come first.
Nexus Circle: step “clarify the goal” running. Codex reads the task “yearly overview per account” in the Kassenbuch project, read-only.
Clarifying the goal. Codex reads the task “yearly overview per account” and changes no files. Cursor is not signed in here.
Nexus Circle: “judging” the task “show amounts in German format”. Codex judges, read-only; Cursor waits; goal, implement and verify are ticked.
Judging. Goal, implement and verify are ticked; Codex judges “show amounts in German format” read-only.
Nexus Circle: Cursor reports that the implementation meets the acceptance criteria; Codex waits.
Cursor reviews. Its verdict sits in its own bubble: the implementation demonstrably meets the acceptance criteria.
Nexus Circle: Codex reports its usage limit, the run is paused and shows “needs clarification”.
When an AI cannot go on. Codex reports its usage limit; Nexus Circle stops and says so instead of carrying on.
What is not included

Limits, stated plainly.

  • Windows 11 onlyThere is no version for Mac or Linux.
  • AI usage not includedYou pay Codex and Cursor at those providers, and their limits apply: on 14 October 2026 Codex reported its limit, Nexus Circle stopped and said so.
  • Nexus Circle on requestThe download below is Nexus PM 2.6.1. Nexus Circle is available as a trial build on request.
  • No publisher signatureThe installer is not signed yet, so Windows reports an unknown publisher. The checksum below proves the file arrived unchanged.
Pricing

Pay once. Keep it forever.

Net prices, one-time, twelve months of updates included. Optional after that.

Single seat

299 € one-time

One person, one computer, every feature.

Team up to 5 people

999 € one-time

For small teams. Team features stay optional.

Team up to 15 people

2,490 € one-time

For larger teams and departments.

On-site setup: 890 € flat. Installation, data import, one hour of training.

Updates after twelve months: 25 percent of the purchase price per year, optional.

Trial: 0 €, complete, no time limit.

All prices plus statutory VAT.

Download

Nexus PM 2.6.1 for Windows 11.

Installer from 18 October 2026. Nexus PM starts empty: nobody else's projects, no sample data.

NexusPM-Setup-2.6.1.exe

91.3 MB · Windows 11, 64-bit

Download installer

Check in PowerShell that the file arrived unchanged. The value must match the one above:

Get-FileHash .\NexusPM-Setup-2.6.1.exe -Algorithm SHA256
Answers

What people often ask.

Where does Nexus PM keep my data?

In one file on your computer. No account with us, no mandatory cloud; without signing in, nothing leaves the machine. Team features are optional.

How much does Nexus cost?

Single seat 299 €, team of up to 5 people 999 €, team of up to 15 people 2,490 €, net and one-time, twelve months of updates included. After that, optionally 25 percent of the purchase price per year. Trying it is free and has no time limit.

What is Nexus Circle?

The companion of Nexus PM. It takes tasks, lets Codex implement them, runs build and tests itself and has Cursor check along. A task is done only when the tests pass and both AIs agree. The report then sits in the same task.

Does Nexus run on a Mac or on Linux?

No. Both programs run on Windows 11 only.

What else does Nexus Circle need?

Codex on your computer with your ChatGPT account and, for the second check, the Cursor command-line program with your Cursor account. You pay those providers for that use; it is not in the price.

Try it first, then decide.

  1. TodayDownload, install, start the first project. No sign-up.
  2. If it fitsOne email with the number of people. Back come the invoice and the activation.
  3. Nexus CircleThe trial build is available on request by email.
Download Nexus PMRequest by email