Lambda ERP is an open-source, AI-native Enterprise Resource Planning (ERP) solution designed to redefine how organizations manage their business processes via conversational interfaces. This prototype offers a simplified approach to ERP functionality where users can create invoices, check inventory, respond to accounting queries, and generate reports using plain language commands.

Key Features

• Chat-Driven Interaction: Unlike traditional ERPs, which require extensive training and configuration, Lambda ERP prioritizes a chat-first interface that allows users to engage with the system effortlessly.

• Cost-Efficient Deployment: Standard ERP implementations can incur significant costs in consultant fees and configuration. Lambda ERP minimizes these expenses by leveraging large language models (LLMs) to automate text-based tasks that usually require extensive manual handling.

• Comprehensive Document Handling: The system manages a range of document types, including purchase invoices, sales orders, credit notes, and reports, all organized within a unified document lifecycle that simplifies tracking and management.

• Self-Hosted and Open Source: Designed to be self-hosted, Lambda ERP offers users full control over their data and configuration, allowing for continuous evolution of the system without the constraints of hired consultants.

Operational Mechanism

Lambda ERP consists of a sophisticated architecture involving:

┌────────────────────────────┐    ┌────────────────────────────┐
│  React + Vite frontend     │◄──►│  FastAPI backend           │
│  - Document forms          │    │  - Document CRUD API       │
│  - Reports / Analytics     │    │  - Report endpoints        │
│  - Chat (WebSocket)        │    │  - Auth (JWT cookie)       │
│  - Client-side JS runtime  │    │  - WebSocket chat gateway  │
│    (Web Worker) for charts │    └────────────┬───────────────┘
└────────────────────────────┘                 │
                                               ▼
                           ┌──────────────────────────────────────────┐
                           │  LLM orchestrator                        │
                           │  - GPT-5.4 drives the reasoning loop     │
                           │  - Tool-use: document CRUD, search,      │
                           │    reports, aggregations, analytics      │
                           │  - Delegates JS generation to Anthropic  │
                           │    code-specialist sub-agent             │
                           └──────────────────┬───────────────────────┘
                                              │
                                              ▼
                           ┌────────────────────────────────────────────┐
                           │  lambda_erp/ (pure Python, no framework)   │
                           │  - Document base class + lifecycle         │
                           │  - General Ledger (double-entry)           │
                           │  - Stock Ledger (moving average)           │
                           │  - Tax calculation engine                  │
                           │  - Pluggable DB backend (SQLite / Postgres)│
                           └────────────────────────────────────────────┘

Key Component Highlights

• Document Lifecycle Management: With a shared base class for all documents, the LLM efficiently handles diverse document processes.
• LLM Orchestration: The integration of GPT models allows for innovative tooling and user interactions, enabling custom report generation and dynamic document manipulation via conversational input.

Current Functionalities

Lambda ERP currently supports:

• Complete sales and purchase cycles
• Credit and debit processing with proper ledger integration
• Moving-average stock ledgers with safeguard protocols
• Standard reports including Profit & Loss, Balance Sheet, and more
• Server-side data aggregation for prompt querying

Looking Ahead

Future improvements for Lambda ERP include:

• Enhanced multi-currency support
• Integrated communication systems for supplier/customer interactions
• Expanded reporting capabilities and compliance with regional tax regulations

Community Collaboration

Lambda ERP thrives on community contributions, aiming to compile collective knowledge on regional tax rules and industry-specific workflows. Contributions welcome through GitHub, with discussions encouraged via the Discord server.

Find Out More

To see Lambda ERP in action, access the Live Demo and explore the possibilities of an AI-driven ERP system tailored to the needs of modern businesses.