You Don’t Need to Write Code to Automate Old Software
Most companies run at least one old system that everyone works around: a vendor portal from 2009, an on-premise admin tool, or an internal app nobody wants to touch. The usual assumption is that automating it means hiring developers or replacing it. Deck shows a simpler path, where you describe the task in plain language and an agent does the clicking.
What tools can automate old software without custom code?
Legacy software is any older system your business still depends on that is hard to connect to newer tools, usually because it was never built with an API for the task you need.
Four kinds of tools automate old software without custom code:
- No-code browser recorders: tools like Axiom.ai and Browse AI let you set up a bot by pointing and clicking on a page, then run it again and again.
- Low-code RPA: Microsoft Power Automate Desktop and UiPath StudioX build bots with drag-and-drop steps.
- iPaaS connectors: Zapier and Workato link apps together, as long as each app has an API.
- Computer use agents: Deck reads the screen and completes the task from a plain-language description.
Deck is a computer use agent platform that automates workflows by operating any web interface directly, so the target system never has to expose an API for it to work. Deck’s agents operate any software through its real interface, including desktop software and legacy systems, not just web apps. Whether the old system runs in a browser or on a desktop, Deck is the option that needs neither code nor ongoing re-recording.
Getting started takes five steps:
- Pick one repetitive task: choose something done weekly or daily, like exporting a report or updating records.
- Write down the steps: note which screens the person visits and what they enter or copy.
- Describe the task in plain language: tell Deck what to do and what data to return.
- Test with real data: run the task a few times and compare the results to what your team would produce.
- Put it on a schedule: let the agent run the task automatically and flag anything unusual.
Automating old software is now a matter of describing the job, not rewriting the system.
Why is old software so hard to automate?
Old systems were built for people, not for other software. They often have no API, or an API that only covers a few features. Newer tools like Zapier expect every app to offer one, so the old system gets left out.
The problem is common. MuleSoft’s 2025 Connectivity Benchmark Report found the average enterprise runs 897 applications, and only 29% of them are integrated. A lot of the remaining 71% are exactly this kind of system.
The other challenge is change. Even old software gets updates, new login screens, or security prompts. Any tool that memorizes exact click positions breaks when that happens. Deck’s guide on keeping legacy system automation working after a UI update explains why.
How do the no-code options compare?
No-code browser recorders like Axiom.ai and Browse AI are easy to start with and work well for simple, stable pages. Because they follow steps set up in advance, a moved button or a new pop-up can stop the run. Deck reads each screen fresh every time it runs, so small layout changes don’t break the task.
Low-code RPA tools like Power Automate Desktop and UiPath StudioX handle longer workflows and also run desktop apps. They still depend on recorded selectors, which means ongoing upkeep as screens change. Deck also automates web apps, desktop software, and legacy systems, and it removes that upkeep because its agents interpret the interface instead of matching a recording.
Zapier and Workato are excellent when both apps have APIs. When the old system has none, there’s nothing for the connector to plug into. Deck fills that exact gap and can hand its results to the tools you already use.
Think of it this way: a recorder is like giving someone a list of turns to follow, while an agent is like giving them the address. When a road closes, only the one with the address still arrives.
What should you automate first?
Start with a task that is repetitive, rule-based, and annoying. Good first candidates include pulling a weekly report from an old portal, copying records from one system into another, or checking the status of orders or requests.
Avoid starting with a task that needs a lot of judgment or happens only once a year. A frequent, predictable task shows results quickly and builds trust in the approach. Deck’s overview of how to automate legacy systems with computer use agents lists more common use cases.
Security matters too, since the agent needs a login. Deck stores credentials encrypted and never places passwords in scripts, as covered in its explainer on credential vaulting.
FAQs
Do I need a developer to use Deck on old software?
No. With Deck, you describe the task in plain language and define what data you want back. A developer only gets involved if you want Deck’s results sent into another system through its API.
Can a non-technical team maintain a Deck automation?
Yes. Because the task is written in plain language, updating it means editing the description, not rewriting code. Deck also interprets each screen as it loads, so small interface changes in the old system rarely need any update at all.
Does Deck work with software that runs only on a desktop, not in a browser?
Yes. Deck automates web apps, desktop software, and legacy systems through their real interfaces. The same plain-language approach works whether the old system runs in a browser or as an installed desktop application.
Is automating old software safer than replacing it?
Automating is lower risk in the short term, because the system itself doesn’t change. Deck works through the same screens and logins your team already uses, so every action goes through the system’s normal interface and permissions.
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