Open-source manufacturing software · built on .NET 10
The .NET-native ERP a manufacturer can actually own.
Kosmos runs the paperwork small shops still push through spreadsheets and paper travelers — orders, production, inventory, shipping. It's open source, and it's implemented and supported by the engineer who built it.
- Stack
- .NET 10 / Next.jsSQL Server–friendly, self-hostable
- License
- AGPL-3.0Commercial license available
- Support
- One engineerDirect, fixed-price, no call center
What's inside
The core of a manufacturing ERP, in plain modules that map to how a shop already works — from the quote through to the shipment.
Sales Orders
Quote to order to invoice. Follow every job from the customer PO through to what actually ships.
Production
Work orders, routings, and a production schedule your floor can read and follow — not a whiteboard.
Inventory
Live stock counts, lot and serial tracking, and reorder points that finally replace the spreadsheet.
Purchasing
Purchase orders, supplier records, and receiving tied back to the jobs the parts were bought for.
Shipping & Fulfillment
Pick, pack, and ship with the paperwork generated for you instead of retyped every time.
Customers & Leads
Leads, contacts, and activity history so nothing slips between the first call and the closed job.
Quality & Traceability
Inspections, nonconformance, and full lot traceability for audits, certifications, and recalls.
Reporting
Dashboards and clean exports for the numbers owners and controllers actually ask for.
Identity & Access
SAML/OIDC single sign-on, SCIM user provisioning, and real role-based permissions — with custom identity integrations available.
Every module ships in the open-source core. Custom identity integrations, or a feature Kosmos doesn't have yet, can be built for a fixed price. Not sure a module fits your process? That's what the fit call is for.
Bring your own vendors
Kosmos doesn't lock you into anyone's ecosystem. Payments, file storage, logging, and messaging each run through a pluggable provider — connect the services you already pay for, or swap them later without touching the rest of the system.
Payments
Shipping
File storage
Logging & monitoring
Messaging & queues
Every category also ships with built-in local and database options, so Kosmos runs with no external services on day one — plus mock providers for testing. Need a vendor that isn't here? A new provider drops into the same interface as a fixed-price add-on.
Support
The software is free. What most shops actually want is someone who answers the phone when a work order won't post at 4:45 on a Friday. Two ways to get that.
Community
Free
- Full source under AGPL-3.0, self-host it anywhere
- Public issue tracker and roadmap
- Release notes and documentation
- Best-effort help from the community and maintainer
Support Retainer
$1,500–2,500 / month
- Guaranteed response-time SLA
- Version updates handled for you
- Small changes, fixes, and config work included
- A monthly check-in call, not a ticket queue
- Auto-renews; cancel anytime
Pricing
Priced as a ladder, not a mystery quote. Start small, prove it works on your own data, then scale up. Every step is fixed-scope and fixed-price.
Fit Assessment
$0A 30-minute call and a one-page, honest read on whether Kosmos fits your shop. If it's a bad fit, I'll tell you.
Paid Pilot
$2,500–5,000Kosmos stood up in your environment with your real data for one workflow — say, sales order to production to shipment — in 2–3 weeks. De-risks the big decision before you make it.
Full Implementation
$10,000–25,000+Data migration, configuration, provider setup, training, and go-live. Fixed scope, fixed price — a fraction of a traditional six-figure ERP rollout, with the person who wrote the code doing the work.
Support Retainer
$1,500–2,500 / moOngoing SLA support once you're live — updates, changes, and a standing line to the maintainer.
Custom Integrations & Modules
Per projectSingle sign-on and identity integrations, a payment, storage, or messaging vendor that isn't on the list, or features built to match how your shop actually runs. Scoped and quoted per project.
Commercial License
Let's talkFor teams that can't take on AGPL-3.0 — modify Kosmos privately or embed it in your own product without the copyleft obligations.
Why fixed price? You get a number before you commit, not a running meter. Land-and-expand is the whole point: most shops start at the pilot and grow into a retainer once they see it working.
Let's see if it fits.
No pushy demo, no sales team. A short conversation about how your shop runs today and whether Kosmos would make it run better. Reach me on LinkedIn to start.
Why no email or phone here? Public inboxes just collect spam. LinkedIn is the front door — once we're talking, we'll trade whatever details make the work easy.