Multi-channel inventory management that actually works
Sell on Shopify, WooCommerce, Amazon, eBay, and your own site? Track inventory across all channels from one place. Free to run on your own computer; add Celerp Connect to put your whole team on it from any browser - one flat price, never per user.
Free, with open-source modules. No credit card required.
Why ecommerce sellers overpay for inventory software
Managing inventory across multiple channels is a nightmare. Most tools charge per-channel or per-user.
Multi-channel chaos
Selling on Shopify + Amazon + eBay + your own site? Each platform tracks inventory separately. Overselling happens when stock levels dont sync in real time.
Per-channel pricing adds up
Most inventory apps charge per sales channel. 4 channels = 4x the cost. Celerp connects to all your platforms for one price: free.
No real accounting
Your inventory system doesnt talk to your accounting. Manual reconciliation across platforms wastes hours every week. Celerp does both in one tool.
Per-user pricing kills margins
Your whole team needs access - warehouse staff, fulfillment, customer service. Per-user pricing means you pay $50-100/user/mo. Celerp has unlimited users.
Get started in 3 steps
Download and install Celerp
pip install celerp or download the desktop app. Takes under 2 minutes.
Connect your sales channels
Connect Shopify, WooCommerce, or import orders via CSV. Your inventory syncs across all channels.
Turn your computer into a team server
Run the free app yourself, or add Celerp Connect and one Mac Mini or PC becomes a secure server your whole team reaches from any browser. One flat price, no per-user fees, no IT.
What you get - included at no cost
Everything an ecommerce business needs, built into the core.
Track stock across Shopify, WooCommerce, Amazon, eBay, and your own site from one dashboard.
All orders from all channels flow into one system. Pick, pack, ship - all tracked.
Scan to receive stock, pick orders, and do cycle counts. Works with any USB or Bluetooth scanner.
Double-entry accounting with journal entries, P&L, and bank reconciliation. COGS tracked automatically.
Why ecommerce businesses choose Celerp
A modular platform that scales from a solo seller to your whole team.
- ✓ Multi-channel inventory management
- ✓ Order management and fulfillment
- ✓ Barcode scanning
- ✓ Lot tracking and expiry dates
- ✓ Click-to-edit bulk data entry
- ✓ Manufacturing and BOM
- ✓ Full double-entry accounting
- ✓ CSV import/export
- ✓ Unlimited users
- ✓ AI operator for queries
Real cost comparison (Year 1, 5 users)
| Feature | Celerp | Ordoro | Linnworks |
|---|---|---|---|
| Year 1 cost (5 users) | ✓ Free | $599/mo | $449/mo |
| Unlimited users | ✓ | Per-user | Per-user |
| Multi-channel sync | ✓ | ✓ | ✓ |
| Order management | ✓ | ✓ | ✓ |
| Built-in accounting | ✓ | ✗ | ✗ |
| Barcode scanning | ✓ | ✓ | ✓ |
| Self-hosted / data ownership | ✓ | ✗ | ✗ |
| AI operator | ✓ | ✗ | ✗ |
| Modular architecture | ✓ | ✗ | ✗ |
Competitors charge $50-200/mo for multi-channel inventory. Celerp is free.
How we make money
The desktop app is free. We charge for optional Connect features: connector sync (Shopify, WooCommerce, Xero, QuickBooks), encrypted backups, and AI. No hidden fees, no per-user pricing.
Free. Forever.
No per-user pricing. Add your whole team for $29/mo.
Full ecommerce ERP - multi-channel inventory, orders, accounting.
Download FreeSource-available. Self-hosted. Free forever.
Frequently asked questions
Is Celerp really free for ecommerce?
Yes. The desktop app is free, with a source-available core and open-source MIT modules. Track inventory across all your sales channels, manage orders, and handle accounting - no features locked behind a paywall, no per-seat fees. Create unlimited user accounts (one signed in at a time on the free app; Celerp Connect for your whole team at once).
Can I connect Shopify and WooCommerce?
Yes. Celerp has connectors for Shopify and WooCommerce. Connect them via Settings → Connectors. Your inventory syncs automatically across all connected platforms.
How does multi-channel sync work?
When you sell on one channel, stock levels update across all connected channels in real time. No more overselling because Shopify and Amazon show different stock numbers.
How does the whole team connect?
On the free app, one person is signed in at a time. To get the whole team on it at once - warehouse, fulfillment and customer service, each from their browser - add Celerp Connect: any Mac Mini or PC becomes a secure server, in the office or remotely. One flat price, never per user.
Can I import my existing product catalog?
Yes. Import your product list via CSV. Or connect Shopify/WooCommerce and pull your products automatically. Most sellers are operational within 30 minutes.
Start managing multi-channel inventory today
Free, source-available, self-hosted. Scales from a solo seller to your whole team. No consultants needed.
Source-available. Self-hosted. Free forever.