Legacy OMS
Modernization
Replace, rearchitect or progressively upgrade the system that is holding your commerce back. In weeks, not years.
This is important info for you to know. We’re continuously updating our knowledge hub as OMS technology, AI, fulfillment models, sales channels, and your requirements evolve. Have a question you need answered on this topic?
Ask usWhat is Legacy OMS Modernization?
Legacy OMS modernization is the process to replace, rearchitect and/or progressively upgrade an outdated order management system. This can be an old system you pay a subscription for, a homegrown one, or the extension of a non-OMS tool like an ERP that is doing some OMS capabilities via customization. They are all legacy.
Modernization is done to support modern commerce requirements. Think real-time inventory, distributed fulfillment, new sales channels, faster integrations and AI-driven experiences.
If you’re reading this, you know your current system or pieced together one isn’t working. It likely isn’t ready for agentic commerce and LLM shopping. It cannot handle your growth whether flash sales, M&A activity, new regions, etc. And it’s costing you an arm and a leg.
Why Legacy OMS Modernization?
That’s easy, cost and customer experience. Plus, now it’s possible to do it fast.
Let’s look at cost. Do you know how much you are currently paying for your current OMS? And not just licensing fees. But internal IT support, legacy vendor support, manual process labor cost, lost revenue from order errors, security and compliance incidents. That’s not even including opportunity cost.
Doing nothing is the most expensive decision you’ll make this year. You’ve delayed for good reasons, financial and risk. Those reasons just expired.
| Before Legacy OMS ModernizationStay, Pay More, Fall Behind | After Legacy OMS ModernizationModernize (with Fluent of course) | Why |
|---|---|---|
Slow to change | Release when you want | Your competitors release weekly. You release when your system lets you or you don’t because it’s too expensive. |
Expensive to maintain | Costs drop from day one | Your money shouldn’t be spent on maintenance, it should be spent on innovation. You’re wasting budget. |
Monolithic and hamstrung | Composable and independent | Change one thing without risking everything. Grow without constraint. Deploy without asking permission. |
Legacy gravity | Forward momentum | Your legacy system makes it harder to leave. A modern one advances you every year. |
And if we want to get a little more nuanced on Legacy OMS vs Modern OMS:
| Legacy | Modern |
|---|---|
| Batch | Real-time |
| Monolithic | Composable |
| Customization-heavy | Configurable/extendible |
| Slow integrations | AI + API-first |
| Limited scalability | Infinite |
| Upgrade projects | Continuous release |
| System-centric | Customer-centric |
| Rules based | AI-enabled |
Where to start?
Start with a legacy migration assessment. We’ll do it for you. Uncover your total cost of ownership today, map out your requirements, and provide back a timeline and ROI.
We’ve been able to promise an in-year-return for every legacy OMS migration so far.
Fluent Commerce customers have been able to achieve a 35% decrease in cost and go live in 8 weeks. Another has seen a 66% reduction in cost and a go live in 10 weeks.
I Want the AssessmentA more comprehensive look into the process
Legacy code and artifacts
Current state inputs
Use the existing artifacts to generate a full understanding of the current capabilities. Unwind the ball of yarn.
- Code & configs
- Requirements
- Architecture diagrams
- Questionnaire of business inputs
Assessment
Prove value + path to launch
Review and produce a clear business case, coupled with supporting migration plan.
- Value proposition: TCO & ROI
- Scope list w/ complexity
- Connectors list
- Project timeline, resourcing, cost
Delivery
AI enabled implementation
Builder tooling to support rapid migration off of existing platform to realize Fluent benefits ASAP.
- CLI
- Builder MCP & Claude Skills
- Fluent Connect
- RFL (Ready for Launch) validations
- And more…
We love good questions. We loathe bad answers.
(aka our FAQ)
What does OMS modernization mean?
It’s not always rip and replace (but what we’ve shown you so far is that). Thanks to AI it’s possible with less risk than ever before. But there is a spectrum. Replace → Replatform → Rearchitect → Incrementally Modernize. We’ll help you find the best option.
Why are retailers modernizing their OMS?
As we said, cost and customer experience. But you don’t have to believe just us, as the industry is saying it too. Gartner specifically calls out the ‘legacy technical debt is already creating business problems. From increased costs, lack of interoperability, and missed business opportunities’
Is my OMS ready for modern commerce?
We recommend a quick self assessment here:
- New integrations take months
- Every change require customization and cost
- Inventory isn’t available in real-time
- Scale of any kind is hard (regions, M&A, etc.)
- Your OMS can’t scale during peak events (black friday, flash sales, viral social selling)
- IT is spending more time on maintenance than innovation
What is the cost of doing nothing?
You tell us, what are these costing you:
- Maintenance
- Customizations
- Upgrades
- Integrations
- Infrastructure
- Specialist resources
- Lost revenue from canceled orders, costly shipping (split or not), etc.
What are the business benefits of modernization?
Just to name a few here:
- Cost cost cost (lower TCO of everything)
- Faster innovation (think fulfillment options, showing up on LLMs, agents handling WISMO inquiries)
- Faster and less expensive integrations
- Happy customers, higher NPS, lower CAC
- Better inventory utilization (this has quite the waterfall impact)
- And so much more. And we’re not just saying that, reach out to our team
Which OMS is right for modernization?
We’ve got you. Check out all of the options here: [link to compare us page]. Of course we’re going to say us, but we’ll let you evaluate and decide.