NEXUS — Source-Available Business Suite for Service Teams
Source-Available · BSL Licensed · v1.1.0
The business suite built for<br>teams that ship.
CRM, project management, invoicing, time tracking, HR, marketing automation, uptime monitoring, and workflow automation — all in one modern application. Free to self-host. No per-user pricing. No vendor lock-in.
View on GitHub<br>Explore Features
77<br>Data Models
50+<br>API Endpoints
10<br>Core Modules
BSL<br>Licensed
What's new in v1.1.0
Released April 2026 — the largest update yet, with framework upgrades and major new features across the board.
Laravel 13 & Angular 21
Full framework upgrade — Laravel 13 with PHP 8.3+, Angular 21 with TypeScript 5.9. Keycloak Guard 2.0, PHPUnit 12, and exceljs replace xlsx for Excel exports.
Advanced Invoicing
Undo the last invoice, combine line items into a single entry, and stage invoices as regular, support, or downpayment — giving you full control over complex billing scenarios.
Git Webhook Jobs
Four new webhook job processors — issues, notes, pipelines, and pushes — replace the old single-handler approach for richer GitLab event tracking per project.
Project Work Alerts
Automatic email alerts when a project's tracked hours approach its budget threshold. Configurable per project — no more surprise overruns.
Customer Initiatives
Assign customers to marketing initiatives directly from their profile, with a new prediction bias chart showing forecast accuracy per customer over time.
Holiday Validation
New Holiday model with German regional holiday support validated by ZIP code — ensuring accurate working day calculations across all federal states.
Everything your service business needs.<br>Nothing it doesn't.
Unlike bloated ERPs designed for every industry, NEXUS is laser-focused on what service-oriented companies actually use every day.
Customer Management
Full CRM with company profiles, contacts, relationship graphs, and geographic visualization.
Project Management
Gantt planning, milestones, tasks, team allocation, and budget tracking with forecasting.
Invoicing & Billing
PDF generation, email delivery, recurring billing, cash flow analysis, and ML predictions.
Time Tracking
Real-time tracking with focus categories, workload heatmaps, and automatic billing.
HR & People
Vacation management, sick leave, working hours, team analytics, and employee profiles.
Marketing Automation
Prospect pipelines, workflow builder, Sankey funnels, lead segmentation, and campaign tracking.
Sentinels
No-code event automation with 20+ condition operators and template interpolation.
Uptime Monitoring
HTTP health checks with email and chat alerts — no separate tool needed.
Project Debriefing
Post-project reviews with problem/solution libraries and cross-project trend analysis.
Calendar & CalDAV
Calendar management with native CalDAV & CardDAV — sync with any standard client.
Product Catalog
Service and product management with groups, statistics, and variant handling.
Integrations
GitLab, Mattermost, Slack, Local AI, Mantis — all wired in, not bolted on.
Customer Management
Your clients aren't rows in a spreadsheet.
NEXUS gives every customer a living profile — projects, invoices, support tickets, and relationships, all in one place. Visualize your business network, track revenue per client, and never lose context.
Multi-tab customer profiles with 10+ views
Contact management with individual VCards
Network graph for relationship visualization
Geographic map view of your customer base
Revenue analytics, billing history, and forecast accuracy charts
Customer initiative tracking and segmentation
Company connections — suppliers, partners, subcontractors
Project Management
From first quote to final retrospective.
Manage every phase of a project without switching tools. Gantt timelines, milestone tracking, team assignment with percentage allocation, budget vs. actual comparisons, and prediction accuracy metrics that help you quote better next time.
Gantt planning with milestone dependencies
Quote generation and installment invoicing
Team allocation with percentage-based assignments
Work threshold alerts when projects approach budget limits
Linear regression forecasting for budgets and timelines
Technology stack detection per project
GitLab, Mattermost, and Mantis plugin links
Invoicing & Billing
Invoices that write themselves.
With ML-powered line item predictions, recurring billing, one-click PDF generation, and direct email delivery — getting paid has never been easier. Bank CSV import, DATEV export, and cash flow visualization round out a complete financial toolkit.
Professional PDF invoices with your branding
ML-powered amount predictions from historical data
Standing orders for recurring / subscription billing
Downpayment and support invoice staging
Undo last invoice and combine line items
Cash flow analysis and bank CSV import
Payment reminders with automated follow-up
DATEV export for...