Celerp

Free business management software for you and your office. Setup in minutes. Easy enough for solo entrepreneurs and powerful enough for large enterprises

Inventory, invoicing, purchasing, consignment, manufacturing, accounting, and CRM - in one app, on your computer. No subscription. No cloud required.

Website: www.celerp.com

Celerp is simple to use, flexible, customizable, and designed to transition your business into the AI age with no technical knowledge needed to setup your whole office. We want to put businesses back in charge of their data.

Downloads Tests License

Celerp manufacturing cost worksheet

Screenshots

Real double-entry accounting, multi-location inventory, manufacturing, and a built-in REST API - one self-hosted app.
Dashboard with revenue trend, receivables aging, and inventory mix
Dashboard - revenue trend, AR aging, inventory mix		 Multi-location inventory with barcode scanning and valuation
Inventory - multi-location, barcode, valuation
Double-entry trial balance that ties out to zero
Trial balance - ties out to zero		 Balance sheet generated from the event-sourced ledger
Balance sheet - live from the ledger
Production planning by status, priority, and due date
Production planning - work orders, priorities, due dates		 International shipping document with commercial invoice and customs detail
Shipping documents - commercial invoice and customs
Built-in REST API for integrations
REST API - integrate anything		 Customer statement of account showing receivables
Statement of account - customer AR at a glance

More in the press kit.

Install

Platform Link
Windows (.exe) Download
Linux (.deb) Download
macOS (.dmg) Download

Double-click. No account. No credit card. Your computer securely becomes the server for your office

Or install via pip:

pip install celerp
celerp init        # sets up the database and launches Celerp

Open http://localhost:8080. Done. Your office can securely access the system at your IP address :8080.

No PostgreSQL to install: celerp init uses your existing PostgreSQL server if one is running, and otherwise starts a self-contained bundled database — no sudo, no system service. Point it at a specific server with celerp init --db-url postgresql+asyncpg://….

Running headless or under a process manager? Use celerp init --no-start to set up without launching, then have your service run celerp start — see Run as a service (systemd).

What's inside

  • Track inventory across locations, scan barcodes, print labels
  • Send invoices, purchase orders, quotations, credit notes
  • Double-entry accounting with chart of accounts, P&L, balance sheet
  • Connect Shopify, WooCommerce, QuickBooks, Xero
  • Manufacturing - BOMs, production orders, merge/split/transform
  • CRM - contacts, pipeline, memos, activity feed
  • Recurring subscriptions with automatic invoicing
  • CSV import/export everything - idempotent, audited, column-mapped
  • Multi-company from one install
  • Role-based permissions - five access levels (viewer, operator, manager, admin, owner) for controlled employee access
  • Works offline, no internet required

How it works

Celerp runs entirely on your machine. Your data never leaves your computer.

  • No setup - the desktop app bundles Postgres, runs migrations on launch, opens in your browser
  • No lock-in - your data stays in a standard Postgres database you control
  • Teams - run as a local server, teammates connect over the LAN

Modules

Every business domain is a self-contained module. The full set ships with the download:

Module What it does
celerp-inventory Items, stock levels, locations, barcode scanning, valuation
celerp-contacts Contacts, addresses, tags, notes, file attachments
celerp-docs Invoices, POs, quotations, credit notes, receipts
celerp-accounting Chart of accounts, journal entries, P&L, balance sheet
celerp-reports AR/AP aging, sales, purchases, inventory valuation
celerp-subscriptions Recurring billing, auto-invoice generation
celerp-manufacturing BOMs, production orders, merge/split/transform
celerp-labels Label printing, barcode generation
celerp-verticals Industry presets - configure for your business type on first run

The onboarding wizard lets you pick your industry. Modules can be toggled any time at Settings > Modules.

Build your own

"My vision for Celerp is that anyone with AI coding tools can describe what their business needs and get a module that imports right into the system."

Noah Severs, Founder

Every feature above is a module on one loader API, and you can build against the same API. A module is a Python package you drop into Celerp's modules/ folder; it adds its own tables, API routes, and UI pages, no fork or build step.

Architecture

  • Event-sourced - every change is an immutable ledger entry, projections materialize queryable state
  • Modular - each domain is a plugin with its own models, routes, and projections
  • Python/FastAPI backend, FastHTML UI, embedded PostgreSQL
  • SQLite in-memory for tests - no external dependencies to run the test suite

Development

git clone git@github.com:celerp/celerp.git
cd celerp
python3 -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"
celerp init   # creates DB, runs migrations, starts servers

celerp init boots a bundled PostgreSQL when no server is running, so no sudo and no system Postgres are required. To develop against your own server instead, pass --db-url postgresql+asyncpg://….

Open http://localhost:8080. Run tests with pytest tests/.

See CONTRIBUTING.md for environment variables, troubleshooting, and coding guidelines.

Contributing

Issues and PRs welcome. The module system makes it straightforward to add new business domains without touching the kernel.

License

Free to download. Free to self-host. Free to build on.

Celerp is open-core:

  • Source-available core engine under the Business Source License 1.1 - self-hosting permitted, contributions welcome.
  • An MIT-licensed module ecosystem - the default business modules are MIT, so you can fork them, build your own modules, and ship them however you like. See LICENSING.md.
  • A source available application (official UI, document/PDF output and AI & Connect services).

See LICENSING.md for the full map and TRADEMARK.md for use of the Celerp name. One restriction: don't resell Celerp itself as a competing product.

Project links

Data verified by PyPI on Aug 16, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Newer release available (2.3.3)

1 maintainer

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GitHub Statistics

Data verified by PyPI on Aug 16, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

Other/Proprietary License (Business Source License 1.1)

Requires

Python >=3.10

Provides Extra

dev prod

Tags

erp inventory accounting self-hosted fastapi

Classifiers

Report project as malware

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