5 Best Open Source RPA Tools, Tested (2026)

Updated 2026-10-04 · 1189 words

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Quick pick: for general-purpose RPA that covers desktop apps, browsers, and APIs from one actively maintained, Apache 2.0-licensed stack, Robot Framework paired with the RPA Framework library is the strongest all-around choice. If you specifically want a visual, drag-and-drop designer closer to what UiPath offers, OpenRPA is the closest genuinely open source match. We tested all five below for real UI-level automation, not the broader workflow-automation category most "open source automation" roundups default to.

RPA, robotic process automation, means something narrower than general workflow automation: simulating a human's clicks, keystrokes, and screen reads against an application's interface, used specifically when there's no API to call instead. That's a different job than what n8n, Activepieces, or Zapier do, those platforms automate via API calls, which is faster and more reliable whenever an API exists. Our best open source automation tools roundup covers that API-first category; this one is for the smaller, specific case where UI-level automation is genuinely the only option, legacy desktop software, a vendor portal with no API, a screen you have to read because nothing else exposes the data.

Quick comparison

1. Robot Framework + RPA Framework: best general-purpose pick

Robot Framework itself is a keyword-driven test and automation framework, Apache 2.0-licensed, with a large ecosystem of libraries. RPA Framework is the specific library collection, also fully open source, that turns it into a real RPA toolkit: desktop application control, browser automation built on Selenium and Playwright, OCR and image-based recognition, PDF and Excel handling, and more, all callable from the same readable, keyword-based syntax. In our testing, the combination handled a legacy Windows desktop form-filling task and a separate browser-based data-extraction task using the same project structure, which is the real advantage over a narrower single-purpose tool: one skill set covers both.

When NOT to use it: if your team has zero Python experience and wants a purely drag-and-drop visual builder with no code at all, Robot Framework's keyword syntax, while simpler than raw scripting, still asks more of a first-time non-technical user than OpenRPA's visual designer does.

2. OpenRPA: best visual designer

OpenRPA pairs a drag-and-drop workflow designer with an orchestration layer (OpenFlow) for managing and scheduling bots across machines, and it's the closest open source equivalent to a UiPath-style experience we found, under the Mozilla Public License 2.0 and under active development. It's Windows-only, which matters if your target applications or your own infrastructure aren't Windows-based, but for teams automating Windows desktop software specifically, the visual designer gets a non-developer further without writing code than any other tool on this list.

When NOT to use it: skip it if you need cross-platform automation, your bots have to run against Linux or macOS targets, or your actual need is browser-only automation, where a lighter, purpose-built tool will set up faster.

3. UI.Vision RPA: best for pure browser automation

UI.Vision (formerly Kantu) runs as a browser extension for Chrome and Firefox, AGPL-licensed at its core and free for both personal and commercial use at that tier, with visual record-and-replay, OCR, and CSV-driven data runs. It's narrower in scope than the others, built specifically for browser automation rather than general desktop RPA, but that focus means it's genuinely faster to get a web-based automation running than standing up a broader RPA framework for the same job. Paid PRO and Enterprise tiers add update management and support if you need that beyond the free core.

When NOT to use it: if your automation target is desktop software rather than a website, or you need the data-extraction and orchestration depth of a full RPA framework, UI.Vision's browser-first design will feel limiting fast.

4. TagUI: best for a quick, approachable script

TagUI's plain-language flow-script syntax is still one of the easiest entry points on this list for someone with no programming background: a few readable lines handle clicking, typing, and reading values across web, desktop, and the command line. The catch, and it's a real one, is that AI Singapore discontinued official maintenance, so the project now runs entirely on community contributions rather than a funded team. It still works for what it does, but budget for that maintenance reality before building something business-critical on it.

When NOT to use it: skip it for anything you expect to maintain and depend on for years; a more actively backed option like Robot Framework or OpenRPA carries less long-term risk for a production automation.

5. AutoHotkey: best for lightweight, scripted desktop tasks

AutoHotkey isn't a dedicated RPA platform, it's a free, GPL-licensed scripting language for Windows that's been automating keystrokes, mouse actions, and window manipulation for longer than most tools on this list have existed. For a narrow, repetitive desktop task, filling the same form, clicking through the same multi-step dialog, it's often the fastest tool to a working script, with a huge community library of existing scripts to adapt. It has no orchestration layer, scheduling UI, or cross-machine management, you're writing and running scripts directly.

When NOT to use it: skip it if you need to manage, schedule, or monitor bots across multiple machines, or if your automation needs browser-specific handling; it has no built-in orchestration and its browser support is weaker than a purpose-built tool like UI.Vision.

When an RPA tool is the wrong category entirely

If the app you're automating has a real API, even an undocumented one you can reverse-engineer with browser dev tools, API-based automation is almost always faster to build and far more reliable than simulating clicks, UI elements move, load at different speeds, and break automations that would never notice an API response format change. Our best open source automation tools roundup covers that category, and our n8n vs Huginn comparison is a good starting point if you're not yet sure which category your actual workflow falls into.

How to choose

• Choose Robot Framework + RPA Framework if you want one actively maintained toolkit that covers desktop, browser, and API automation without switching tools per task.
• Choose OpenRPA if a visual, no-code designer matters more than flexibility, and your targets are Windows-based.
• Choose UI.Vision RPA if your automation is purely browser-based and you want to be running in minutes, not hours.
• Choose TagUI for a quick personal script where approachability matters more than long-term maintenance guarantees.
• Choose AutoHotkey for a single lightweight, repetitive desktop task with no need for orchestration across machines.

Whichever you pick, verify the target application's terms of service before automating against its UI; some vendors explicitly prohibit it even when no API exists, and that's a business risk no open source license protects you from. For the broader self-hosted automation field beyond RPA specifically, our best self-hosted Zapier alternatives roundup covers the API-first tools worth comparing against before you commit to UI-level automation at all.

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