- Stars
- 9,794
- License
- MIT
- Last commit
- 2 days ago
PHPActive
Best Accounting & Invoicing Tools
Self-hosted and open-source accounting, billing, and invoicing software.
Open-source accounting and invoicing solutions provide self-hosted alternatives for managing financial transactions, billing, and reporting. They are typically released under permissive licenses, allowing organizations to modify the codebase and integrate with existing systems. These tools range from lightweight invoice generators to full-featured ERP suites, and they are evaluated based on community activity, feature completeness, and ease of deployment. Selecting the right solution depends on the organization's size, regulatory requirements, and technical resources.
Top Open Source Accounting & Invoicing platforms
Akaunting
Modern online accounting software for small businesses and freelancers
- Stars
- 9,634
- License
- —
- Last commit
- 4 days ago
PHPActive
Invoice Ninja
Source-available invoicing and time-tracking app built with Laravel
- Stars
- 9,568
- License
- —
- Last commit
- 2 days ago
PHPActive
- Stars
- 8,267
- License
- AGPL-3.0
- Last commit
- 1 year ago
PHPDormant
- Stars
- 8,226
- License
- AGPL-3.0
- Last commit
- 6 months ago
JavaScriptStable
- Stars
- 4,457
- License
- AGPL-3.0
- Last commit
- 1 day ago
TypeScriptActive
Recently updated
4 hours ago
Fast, flexible ERP system built on a 3-tier architecture with REST API and ReactJS frontend. Designed for scalability and ease of use in industry and trade.
What to evaluate
01Community Activity and Support
Assess the frequency of commits, issue resolution speed, and the size of the contributor base to gauge long-term viability and available assistance.
02Feature Set Alignment
Match core accounting functions-such as general ledger, tax handling, multi-currency, and invoicing workflows-to the organization's operational needs.
03Self-Hosting Requirements
Evaluate infrastructure demands, containerization options, and documentation quality for deploying and maintaining the software on-premises.
04Security and Compliance
Review built-in controls, audit trails, and compliance certifications (e.g., GDPR, SOC) relevant to financial data handling.
05Extensibility and Integration
Consider available APIs, plugin ecosystems, and compatibility with third-party ERP, CRM, or payment gateways.
Common capabilities
Most tools in this category support these baseline capabilities.
- General ledger and chart of accounts
- Automated recurring invoices
- Multi-currency support
- Tax calculation and reporting
- Payment gateway integrations
- Expense tracking and receipt upload
- Role-based access control
- Audit logs and activity trails
- API for third-party extensions
- Customizable invoice templates
- Bank reconciliation tools
- Reporting dashboards and export (PDF/CSV)
- Multi-entity and multi-company handling
- Self-hosted deployment via Docker or packages
Leading Accounting & Invoicing SaaS platforms
Conta
Free online invoicing software.
Accounting & Invoicing
Alternatives tracked
6 alternatives
FreshBooks
Easy small-business accounting and invoicing.
Accounting & Invoicing
Alternatives tracked
7 alternatives
invoicely
Free online invoicing for small businesses.
Accounting & Invoicing
Alternatives tracked
6 alternatives
Invoice Ninja
Free invoicing and payments for freelancers and small businesses.
Accounting & Invoicing
Alternatives tracked
5 alternatives
Xero
Cloud-based accounting software for small businesses
Accounting & Invoicing
Alternatives tracked
7 alternatives
Zoho Books
GST-ready online accounting software for Indian SMBs.
Accounting & Invoicing
Alternatives tracked
7 alternatives
Most compared product
7 open-source alternatives
FreshBooks offers invoicing, expenses, time tracking, projects, payments, and bank reconciliation in an intuitive accounting platform.
Leading hosted platforms
Frequently replaced when teams want private deployments and lower TCO.
Typical usage patterns
01Small Business Invoicing
Generate and send professional invoices, track payments, and automate reminders without recurring SaaS fees.
02Mid-Size Enterprise Financial Consolidation
Consolidate multiple subsidiaries' ledgers, manage inter-company transactions, and produce multi-entity financial statements.
03Non-Profit Grant Management
Allocate funds across projects, monitor restricted donations, and produce compliance reports for donors.
04Freelancer Time-Based Billing
Log billable hours, apply rate tables, and issue client-specific invoices directly from the platform.
05Custom ERP Integration
Embed accounting modules within broader open-source ERP stacks to create a unified back-office solution.
Frequent questions
What distinguishes open-source accounting software from commercial SaaS options?
Open-source solutions can be self-hosted and modified, eliminating subscription fees and giving full control over data and customizations, whereas SaaS products are hosted by the vendor and typically charge recurring fees.
Can open-source accounting tools handle multi-currency transactions?
Many mature projects, such as Akaunting and Invoice Ninja, include built-in multi-currency support, allowing users to record, invoice, and report in multiple currencies.
How is data security managed in self-hosted accounting applications?
Security depends on the hosting environment and configuration. Best practices include regular updates, TLS encryption, role-based access, and database backups. Community-driven projects often publish security advisories.
Is it possible to integrate open-source accounting software with existing ERP or CRM systems?
Yes. Most projects expose RESTful APIs or webhook mechanisms, enabling synchronization of customers, invoices, and payments with external ERP, CRM, or e-commerce platforms.
What level of technical expertise is required to deploy these tools?
Basic Linux administration is typically sufficient. Many projects provide Docker images or installer scripts that simplify deployment, but deeper customization may require programming knowledge.
Do open-source accounting solutions provide compliance reporting for taxes?
Several projects include tax calculation modules and generate reports compatible with common tax authorities, though users should verify local compliance requirements.