Best Self-Hosted Invoicing & Accounting Software for Freelancers 2026

Running a freelance business or small agency means dealing with invoices, tracking expenses, chasing payments, and keeping your books in order. Commercial platforms like FreshBooks, QuickBooks, and Xero charge monthly subscriptions, lock your financial data in proprietary clouds, and often make it difficult to export everything when you want to leave.

Self-hosted invoicing and accounting software solves all three problems: it’s free (or nearly free), your financial data stays on your own server, and you control the entire system. In 2026, the ecosystem has matured significantly — the leading open-source options now rival their paid counterparts in features, usability, and payment integrations.

This guide covers the top three self-hosted invoicing platforms, provides docker installation instructions for each, and helps you pick the right one for your workflow.

Why Self-Host Your Invoicing Software

Financial data is among the most sensitive information a business generates. Client names, project details, payment histories, tax records, and bank account information all flow through invoicing software. Handing that data to a third-party SaaS provider introduces several risks:

• Data ownership: When a SaaS company shuts down or changes pricing, your historical invoices and client records can disappear overnight. Self-hosting guarantees permanent access to your own data.
• Privacy: Many invoicing platforms sell aggregated financial data or use it for advertising profiles. Self-hosted software never leaves your server.
• Cost at scale: FreshBooks starts around $19/month and climbs quickly as you add clients. QuickBooks Self-Employed costs $20/month. Invoice Ninja’s self-hosted edition is completely free with unlimited clients and invoices.
• Customization: Need custom invoice templates, unusual tax rules, or integration with your existing tools? Self-hosted platforms let you modify the code, add webhooks, and build custom integrations without begging a vendor for API access.
• Offline access: Your server runs 24/7. Even if the internet goes down at your office, your financial records remain accessible from any device on your network.

Invoice Ninja — The Feature-Rich Leader

Invoice Ninja is the most popular open-source invoicing platform, with over 200,000 self-hosted installations. It supports invoicing, quotes, expense tracking, time tracking, client portals, payment gateways, recurring invoices, and multi-currency billing.

Key Features

• Unlimited clients, invoices, and quotes on the free self-hosted version
• 40+ payment gateway integrations (Stripe, PayPal, Square, Razorpay, and more)
• Recurring invoices and auto-billing
• Client portal with secure login
• Expense tracking with receipt attachment
• Time tracking with billable hours
• Project management basics (tasks, milestones)
• Multi-currency and multi-language support (50+ languages)
• Custom invoice design with CSS customization
• PDF export and email delivery
• API access for custom integrations
• Webhook support for event-driven automation

Docker Installation

Invoice Ninja provides an official Docker image. The following docker-compose.yml sets up the application with a PostgreSQL database and Nginx reverse proxy:

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version: '3.8'

services:
  server:
    image: invoiceninja/invoiceninja:5
    restart: unless-stopped
    user: 1500:1500
    environment:
      - APP_KEY=base64:YOUR_APP_KEY_HERE
      - APP_URL=https://invoices.yourdomain.com
      - DB_HOST=db
      - DB_PORT=5432
      - DB_DATABASE=ninja
      - DB_USERNAME=ninja
      - DB_PASSWORD=secure_db_password
      - REQUIRE_HTTPS=true
    volumes:
      - ninja_data:/var/www/app/public
      - ninja_logs:/var/www/app/storage/logs
    ports:
      - "9000:9000"
    depends_on:
      - db

  db:
    image: postgres:16-alpine
    restart: unless-stopped
    environment:
      - POSTGRES_DB=ninja
      - POSTGRES_USER=ninja
      - POSTGRES_PASSWORD=secure_db_password
    volumes:
      - postgres_data:/var/lib/postgresql/data

  nginx:
    image: nginx:alpine
    restart: unless-stopped
    volumes:
      - ./nginx.conf:/etc/nginx/conf.d/default.conf
      - ./ssl:/etc/nginx/ssl:ro
    ports:
      - "80:80"
      - "443:443"
    depends_on:
      - server

volumes:
  ninja_data:
  ninja_logs:
  postgres_data:

Generate your APP_KEY with:

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docker run --rm invoiceninja/invoiceninja:5 php artisan key:generate --show

A minimal Nginx configuration:

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server {
    listen 80;
    server_name invoices.yourdomain.com;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl http2;
    server_name invoices.yourdomain.com;

    ssl_certificate /etc/nginx/ssl/fullchain.pem;
    ssl_certificate_key /etc/nginx/ssl/privkey.pem;

    location / {
        proxy_pass http://server:9000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

Start everything with:

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docker compose up -d

After the containers start, visit https://invoices.yourdomain.com/setup to complete the initial configuration wizard.

Payment Gateway Setup

Once Invoice Ninja is running, configure payment gateways from Settings → Payment Gateways. For Stripe:

1. Create a Stripe account and obtain your API keys
2. In Invoice Ninja, go to Settings → Payment Gateways → Stripe
3. Enter your publishable key and secret key
4. Enable “Test Mode” for initial testing
5. Set webhook endpoint: https://invoices.yourdomain.com/api/v1/payments/webhook

Stripe charges 2.9% + 30¢ per transaction — this is the payment processor’s fee, not Invoice Ninja’s. The self-hosted software itself has zero transaction fees.

Akaunting — Full Accounting with Double-Entry Bookkeeping

Akaunting targets a slightly different audience than Invoice Ninja. While Invoice Ninja focuses on invoicing and client management, Akaunting provides complete double-entry accounting — more like a self-hosted QuickBooks. It’s built on Laravel and offers a clean, modern interface.

Key Features

• Double-entry bookkeeping with chart of accounts
• Income and expense tracking
• Invoice creation with PDF generation
• Customer and vendor management
• Bank account reconciliation
• Financial reports (profit & loss, balance sheet, cash flow)
• Tax management with multiple tax rates
• Multi-currency support
• Client portal
• Module marketplace (50+ free and paid modules)
• REST API
• Mobile-responsive interface
• Item-based and service-based invoicing

Docker Installation

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version: '3.8'

services:
  akaunting:
    image: serverok/akaunting:latest
    restart: unless-stopped
    environment:
      - AKAUNTING_SETUP=true
      - DB_HOST=db
      - DB_PORT=3306
      - DB_DATABASE=akaunting
      - DB_USERNAME=akaunting
      - DB_PASSWORD=secure_password
    volumes:
      - akaunting_data:/var/www/html
    ports:
      - "8080:80"
    depends_on:
      - db

  db:
    image: mysql:8.0
    restart: unless-stopped
    environment:
      - MYSQL_DATABASE=akaunting
      - MYSQL_USER=akaunting
      - MYSQL_PASSWORD=secure_password
      - MYSQL_ROOT_PASSWORD=root_secure_password
    volumes:
      - mysql_data:/var/lib/mysql

volumes:
  akaunting_data:
  mysql_data:

Start the stack:

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docker compose up -d

Visit http://your-server:8080 to run the setup wizard. Akaunting will guide you through company setup, database configuration, and admin account creation.

Recommended Modules

Akaunting’s module system extends core functionality. These free modules are essential for most freelancers:

• Invoice Templates: Additional professional invoice designs
• Recurring Invoices: Automate regular billing
• Email Templates: Customize notification emails
• Twilio: SMS notifications for overdue invoices
• Backup: Automated database and file backups to cloud storage

Install modules from the web interface under Settings → Modules, or via the command line:

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docker compose exec akaunting php artisan module:install alias=module-alias

Crater — Modern Invoicing for Freelancers

Crater is a newer entrant built specifically for freelancers and small businesses. It uses a modern tech stack (Laravel + Vue.js) and focuses on simplicity. While it has fewer features than Invoice Ninja, its clean interface and straightforward setup make it attractive for solo operators who don’t need complex project management or time tracking.

Key Features

• Invoice and estimate creation
• Payment recording and tracking
• Expense management with categories
• Customer management
• Customizable invoice templates
• PDF generation
• Email invoicing
• Reports (revenue, expenses, profit)
• Multi-language support
• REST API
• Mobile-friendly responsive design
• Tax rate configuration
• Notes and terms on invoices

Docker Installation

Crater’s Docker setup is the simplest of the three:

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version: '3.8'

services:
  crater:
    image: ghanemvp/crater:latest
    restart: unless-stopped
    environment:
      - APP_NAME=Crater
      - APP_ENV=production
      - APP_DEBUG=false
      - DB_CONNECTION=sqlite
    volumes:
      - crater_data:/var/www/html
      - crater_db:/var/www/html/database
    ports:
      - "8000:80"

volumes:
  crater_data:
  crater_db:

No separate database container needed — Crater uses SQLite by default, which is perfectly adequate for a single-user freelance operation.

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docker compose up -d

Visit http://your-server:8000 and follow the setup wizard.

Comparison: Invoice Ninja vs Akaunting vs Crater

Choosing the Right Platform

The decision comes down to your business complexity and growth trajectory:

Choose Invoice Ninja if you bill clients regularly and want the most complete invoicing platform. Its payment gateway integrations, client portal, recurring billing, and time tracking make it the best all-around choice for active freelancers and small agencies. The active development community and frequent releases mean new features arrive regularly.

Choose Akaunting if you need proper accounting alongside invoicing. Double-entry bookkeeping, chart of accounts, bank reconciliation, and comprehensive financial reports make it suitable for businesses that need to track finances beyond just sending invoices. It’s closer to a self-hosted QuickBooks than a pure invoicing tool.

Choose Crater if you’re a solo freelancer who wants something lightweight and simple. SQLite means zero database administration, the resource footprint is tiny, and the interface gets out of your way. It won’t scale to complex multi-user scenarios, but for a single person sending 5-20 invoices per month, it’s more than sufficient.

Production Deployment Checklist

Regardless of which platform you choose, follow these steps before going live:

1. HTTPS with Let’s Encrypt

Never run invoicing software over plain HTTP. Client financial data must be encrypted in transit. Use Caddy for automatic TLS:

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services:
  caddy:
    image: caddy:2-alpine
    restart: unless-stopped
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./Caddyfile:/etc/caddy/Caddyfile
      - caddy_data:/data
      - caddy_config:/config

volumes:
  caddy_data:
  caddy_config:

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invoices.yourdomain.com {
    reverse_proxy invoiceninja:9000
}

2. Automated Backups

Financial data needs reliable backups. Use a cron job with pg_dump (for PostgreSQL) or mysqldump (for MySQL):

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#!/bin/bash
# /opt/backup/invoice-backup.sh
BACKUP_DIR="/opt/backup/invoices"
DATE=$(date +%Y-%m-%d_%H%M%S)

docker compose exec db pg_dump -U ninja ninja > "$BACKUP_DIR/db_$DATE.sql"
tar czf "$BACKUP_DIR/files_$DATE.tar.gz" /var/lib/docker/volumes/invoice_ninja_data/_data

# Keep only last 30 days
find "$BACKUP_DIR" -name "*.sql" -mtime +30 -delete
find "$BACKUP_DIR" -name "*.tar.gz" -mtime +30 -delete

Add to crontab:

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0 2 * * * /opt/backup/invoice-backup.sh

3. Email Configuration

Configure SMTP for invoice delivery. Add these environment variables to your docker-compose.yml:

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environment:
  - MAIL_MAILER=smtp
  - MAIL_HOST=smtp.yourdomain.com
  - MAIL_PORT=587
  - MAIL_USERNAME=invoices@yourdomain.com
  - MAIL_PASSWORD=your_smtp_password
  - MAIL_ENCRYPTION=tls
  - MAIL_FROM_ADDRESS=invoices@yourdomain.com
  - MAIL_FROM_NAME="Your Business Name"

For transactional email delivery, consider self-hosting Postal (covered in our email marketing guide) or using a relay like Postmark or SendGrid.

4. Security Hardening

• Run containers as non-root users (Invoice Ninja uses UID 1500)
• Keep Docker images updated: docker compose pull && docker compose up -d
• Use strong, unique database passwords (generate with openssl rand -base64 32)
• Restrict database container ports — never expose them to the host
• Set up fail2ban to block repeated login attempts
• Enable 2FA if your chosen platform supports it

5. Monitoring

Add health checks to your Docker Compose:

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healthcheck:
  test: ["CMD", "curl", "-f", "http://localhost:9000/api/v1/ping"]
  interval: 60s
  timeout: 10s
  [uptime kuma](https://github.com/louislam/uptime-kuma)  start_period: 30s

Pair this with Uptime Kuma for alerting when your invoicing platform goes down — you never want to miss a client invoice because your server crashed.

Final Thoughts

Self-hosted invoicing software has reached a point where there’s no compelling reason for most freelancers and small businesses to pay for SaaS alternatives. Invoice Ninja, Akaunting, and Crater each serve different needs — from lightweight solo invoicing to full double-entry accounting — but all three keep your financial data under your control, cost nothing in software fees, and run comfortably on a $5/month VPS.

The initial setup takes about 15 minutes with Docker, and once running, these platforms require minimal maintenance. Add automated backups, HTTPS, and SMTP configuration, and you have a professional invoicing system that’s more private, more customizable, and more cost-effective than any subscription service.

Frequently Asked Questions (FAQ)

Which one should I choose in 2026?

The best choice depends on your specific requirements:

• For beginners: Start with the simplest option that covers your core use case
• For production: Choose the solution with the most active community and documentation
• For teams: Look for collaboration features and user management
• For privacy: Prefer fully open-source, self-hosted options with no telemetry

Refer to the comparison table above for detailed feature breakdowns.

Can I migrate between these tools?

Most tools support data import/export. Always:

1. Backup your current data
2. Test the migration on a staging environment
3. Check official migration guides in the documentation

Are there free versions available?

All tools in this guide offer free, open-source editions. Some also provide paid plans with additional features, priority support, or managed hosting.

How do I get started?

1. Review the comparison table to identify your requirements
2. Visit the official documentation (links provided above)
3. Start with a Docker Compose setup for easy testing
4. Join the community forums for troubleshooting