Free, self-hosted ERP
for small businesses.
You should own your database. Celerp combines inventory, invoicing, CRM, accounting, purchasing and manufacturing in one local-first ERP that runs on your machine. No per-seat billing and no vendor lock-in.
No account needed · Your data stays local · Works offline
One app. Three jobs done.
Stop juggling spreadsheets, separate accounting software, and disconnected tools. Celerp does it all - locally, for free.
Know exactly what you have
Real-time stock levels, FIFO/FEFO/LIFO costing, expiration date tracking, batch and lot numbers, reorder alerts, weight-based selling. Inventory that actually reflects how your business works.
Invoice, buy, and track cash flow
Create invoices, purchase orders, quotes, and credit notes in seconds. Automatic journal entries. PDF export. Share with anyone - no account required on their end.
Know if you're actually profitable
Double-entry ledger, chart of accounts, trial balance, P&L report. Every document auto-generates journal entries. Real books, not approximations.
Run it yourself.
Or let an AI agent run it.
Celerp's full REST API is free and local - point Claude, ChatGPT, or your own scripts at it and automate anything: draft purchase orders when stock runs low, reconcile invoices, and pull plain-language reports on your margins. Don't want to worry about building it? The in-app AI assistant is part of Celerp Connect.
- Full REST API - every operation available programmatically
- Works with Claude, ChatGPT, and any agent that can call HTTP endpoints
- No special integration needed - it's just a local API
- Automate reordering, reconciliation, and reporting
No code? Build your own ERP features with ChatGPT or Claude
See the API docsAdd the modules you need
Every feature in Celerp is a module. Inventory, accounting, manufacturing, and everything else we ship are built on the same module API you use to build your own. With an AI coding tool you can extend Celerp to a new industry, or fit it to how your business already works.
That layer is the Code Elastic Layer, or CEL.
Built for businesses that move product
Retail and wholesale
Track stock across locations, auto-reorder alerts, supplier POs, and customer invoices - all in one place. No per-seat license when your team grows.
E-commerce sellers
Sync Shopify orders and products into your books automatically. Know your real margins on every SKU, not just your Shopify dashboard approximation.
Celerp for e-commerceImporters and distributors
PO tracking from order to delivery. FIFO/FEFO/LIFO costing, batch tracking, expiry dates, multi-supplier history. Built for businesses with complex inventory.
Service businesses
Invoice clients, track job costs, manage recurring customers, and keep clean books - without a $200/month subscription for features you'll never use.
Celerp for service businessesManufacturers and workshops
Bills of materials, production orders, and real costed output. Track raw materials through to finished goods and see what each run actually cost you.
Celerp for manufacturersAccountants and bookkeepers
Move a client's books from their old system without rebuilding them by hand. Keep working in the client's company, or hand them a company backup they can open in Celerp for free.
Celerp for accountantsCelerp ships preconfigured setups by industry. See the industry presets
How Celerp compares
The same features. $0 instead of $55–$99/mo. The only things you give up are the monthly invoice and the vendor's control over your data.
| Celerp | QuickBooks (Plus) | Xero (Growing) | Zoho Inventory (Professional) | |
|---|---|---|---|---|
| Price | Free | $99+/mo | $55+/mo | $79+/mo |
| Unlimited users | ✓ Always | ✗ 5-user cap | ✓ Included | ✗ 2 users base |
| Your data stays local | ✓ Always | ✗ Connect only | ✗ Connect only | ✗ Connect only |
| Advanced inventory | ✓ FIFO / FEFO / batches | ✗ Basic only | ✗ Basic only | ✓ Yes |
| Multi-company | ✓ Unlimited | ✗ Paid per company | ✗ Paid per org | ✗ Paid per org |
| Open-source modules | ✓ GitHub | ✗ Proprietary | ✗ Proprietary | ✗ Proprietary |
... the journal can be exported in CSV with local and foreign currency columns. This particular feature will make accountants very happy across the world.
Still paying SAP to hold your
business hostage?
A shift is happening. Enterprises that spent years locked into SAP and Navision are realizing the system that was supposed to run their business is running them instead. Celerp is source-available, AI-native, and runs on infrastructure you control - forever. No implementation consultants. No license fees that never end. No data held hostage in proprietary formats.
Not just for you.
Your whole office.
Install Celerp on any machine in your network - a spare laptop, an old desktop, a $50 mini PC. Everyone on your office Wi-Fi opens their browser and it just works. No app install on each computer. No extra licenses to buy.
- Unlimited users and companies. Add your whole team at no extra cost, with Connect available when you need concurrent team access.
- Roles and permissions built in. Staff see only what they need. Owner access, limited warehouse access, read-only - you control it.
- One machine runs it, everyone uses it. Sales log invoices from their desks. Warehouse staff check stock from theirs. One shared source of truth.
Everyone opens their browser. No installs. No per-user fees.
What's the catch?
There isn't one. Here's exactly how this works and how we make money.
Your data stays on your machine
Celerp runs on your hardware with a bundled database. Nothing leaves your machine unless you explicitly enable encrypted backup or connector sync.
No lock-in, ever
Export everything as CSV or JSON at any time. Cancel any Connect plan and your desktop app keeps working - forever, with no data held hostage.
Zero friction to start
Download and run. No email address, no registration, no onboarding call. You're in your first session within 2 minutes of downloading.
How we make money
The desktop app is free. We charge for optional Connect features: connector sync (Shopify, QuickBooks, Xero), encrypted backups, and AI. That's it.
PricingWorks with your existing tools
Celerp connects to the platforms your business already uses. Sync inventory, orders, and data automatically.
Accounting sync
Start for free in under 2 minutes.
Download Celerp, install it, and you're running. No account. No card. No 14-day trial that expires.
If you outgrow the free version, Connect features start at $29/mo - and your data stays yours either way.