Power Platform vs. Open-Source Automation: An Honest Matrix

I run deep Microsoft stack at my MSP and self-hosted n8n at my agency. When Power Automate genuinely wins, when open-source wins, and the honest matrix by scenario.

Key takeaways

• Power Automate genuinely wins inside the Microsoft 365 walls — approvals, document routing, and M365-native triggers on licenses you already pay for — and open-source genuinely wins on AI-heavy workflows, cross-SaaS glue, volume economics, and data residency; most vendor content only tells you one half.
• The licensing gotchas decide more projects than the features do: Power Automate's premium connectors and per-user vs. per-flow plans on one side, and hosting plus maintenance labor on the self-hosted side — price both before you build anything.
• The pattern I actually deploy is hybrid: Power Automate for workflows that start and end in M365, n8n for everything that touches outside systems, joined by a webhook — the platforms are better as colleagues than as rivals.

When Power Automate genuinely wins

When open-source wins

The honest matrix

The licensing gotchas nobody reads

The hybrid pattern I actually deploy

Migration realities, both directions

The bottom line

Most comparisons of Microsoft's Power Platform and open-source automation are written by someone who runs one of them. I run both, daily, with money on the line in each direction: my MSP lives deep in the Microsoft stack — M365 tenants, SharePoint, Teams, the whole licensing lattice — and my automation agency builds and hosts n8n for clients and for our own operations. Disclosure on both flanks, then: I profit from Microsoft licensing as a reseller and from open-source implementation as an agency, which roughly cancels out and leaves me free to tell you what I'd tell a friend.

And what I'd tell a friend is that this comparison is decided by scenario, not by ideology. My n8n vs. Make comparison taught me that readers don't want a winner; they want to know which tool wins for the thing they're actually doing. So this post is built around an honest matrix — five scenarios, a call for each — plus the licensing fine print that decides more of these projects than any feature list does. It extends the workflow-automation bench of my Builder Notes workshop tour into the territory that page deliberately skipped: the Microsoft question.

Let me make the Microsoft case properly, because open-source people tend to strawman it.

M365-native shops. If your company's work already lives in Outlook, Teams, SharePoint, and Excel, Power Automate isn't an integration platform — it's a feature of software you already own. The triggers are native and instant: a file lands in a SharePoint library, a form gets submitted, an email arrives with an attachment. No API keys, no OAuth dance, no webhook plumbing. Identity rides along for free too — the flow knows who the user is because the whole tenant does. For a workflow that starts in M365 and ends in M365, nothing else is even close on time-to-running.

Approval flows. This is Power Automate's genuine crown jewel, and I say that as someone whose default platform is n8n. The built-in approvals experience — the card in Teams, the mobile notification, the audit trail of who approved what and when — is the kind of thing that takes real engineering to replicate elsewhere. Purchase requests, PTO sign-offs, document publishing gates: I've built these in open-source tools, and I've watched Power Automate do them in an afternoon with an experience end users already understand.

Document routing. The SharePoint-centric patterns — content approval, metadata-driven routing, records moving between libraries as their status changes — are where two decades of Microsoft's document-management DNA show. If your compliance story is built on SharePoint retention and labeling, keeping the automation inside the same walls is not laziness; it's coherence.

Already-licensed economics. The seeded Power Automate rights in an M365 subscription mean the first tier of automation is effectively free at the margin. For an SMB with licenses already on the invoice, "use what you're paying for" is a legitimately strong argument — my Make.com post makes a similar approachability case, and Power Automate adds "and it's already in the tenant" on top.

Now the trap that hides inside that last advantage. The seeded licensing covers standard connectors — the M365 family and a set of basics. The moment a flow needs SQL Server, an HTTP call to an arbitrary API, or most third-party systems, you're into premium connectors, and premium isn't a feature toggle — it's a licensing event. Suddenly the automation that was free needs a premium license for the users involved, or its own per-flow plan. Nobody reads this part of the licensing page until the flow is built, working, and blocked. I've watched that exact sequence play out more than once, and the resulting invoice always feels like a betrayal even though it was documented all along.

The other half, argued just as seriously — and for depth on the platform itself, my n8n automation guide is the companion piece.

AI-heavy workflows. This is the widest gap in 2026 and it's not close. n8n ships native AI and LLM tooling — model nodes, agent patterns, vector stores, LangChain integration — as first-class citizens of the canvas. Power Automate has its AI Builder story, and it's fine for its intended scope, but if your workflows are becoming AI pipelines — classify, summarize, draft, decide — you will feel the ceiling quickly. Every AI-forward automation I've shipped in the last year has been on the open-source side, not because of preference but because that's where the primitives are.

Volume economics. Self-hosted n8n charges you nothing per run, per user, or per connector; you pay for a server and for the person who tends it. At low volume that's a wash or worse. At high volume it's the whole ballgame — the same shape of math as the heavy-usage rows in my n8n vs. Make pricing breakdown, where per-something pricing compounds and flat hosting doesn't.

Data residency and control. Self-hosted means the workflow engine, its logs, and every payload passing through it live on infrastructure you control. For healthcare clients, law firms, and anyone whose compliance posture says "this data doesn't transit third-party platforms," that's not a preference — it's the requirement that makes the decision by itself.

Real code steps. When the visual builder runs out — and on any sufficiently interesting workflow, it runs out — n8n hands you a JavaScript or Python node and gets out of the way. Power Automate's expression language exists, and writing anything substantial in it is an experience I'd wish only on people who enjoyed writing Excel formulas inside a text field the size of a fortune cookie.

No per-connector tax. An HTTP request is just a node. A weird legacy API is just a node. The long tail of systems that would each be a premium-connector conversation in the Microsoft world is, on the open-source side, an afternoon of work and zero licensing meetings.

Five scenarios cover most of the real decisions I see. Here's how I actually call them.

Two notes on the matrix. The regulated-data row is genuinely conditional, not a dodge: a medical practice already running Microsoft's compliance tooling has a coherent story staying inside it, while one without that investment gets residency faster and cheaper from a self-hosted engine — the same logic that makes my healthcare clients in the n8n vs. Make comparison lean self-hosted. And the citizen-developer row cuts both ways: Power Platform's greatest strength is that your operations manager can build a flow, and its greatest operational risk is that your operations manager will build forty of them, undocumented, and then take a job somewhere else.

Feature comparisons get the attention; licensing fine print decides the outcome. The traps, from both sides of my desk.

Per-user vs. per-flow. Power Automate premium licensing comes in two basic shapes: license the humans (each user who runs premium flows pays per month) or license the flow itself (a per-flow plan, priced so that it only makes sense for flows serving many users). Choosing wrong is expensive in both directions — per-user pricing across a whole department for one flow they each touch monthly, or a per-flow plan for something three people use. The pattern from my automation strategy guide applies here: count the actual humans and the actual runs before the build, because after the build you'll rationalize whatever the licensing turns out to cost.

The premium-connector ratchet. Covered above, but it belongs in this list because of how it compounds: each new system your flows touch is a fresh licensing conversation, which means the cost of the platform grows with exactly the thing you adopted it for — connecting more systems. It's the same per-something dynamic as Make's operation counting, wearing an enterprise agreement.

And the other side's fine print, in fairness. Self-hosted "free" carries its own invoice: the VPS, the Postgres instance, backups, updates, SSL renewals, and — the line that actually matters — a named human who owns the platform when it misbehaves at 6 a.m. n8n's fair-code license also draws lines around embedding and reselling that agencies specifically should read before building a business on it. When I put self-hosted n8n in front of a client, the hosting line is small and the "who maintains this" line is real, and pretending otherwise is how open-source advocates lose credibility with CFOs.

Here's the part the vendor content on both sides won't tell you: in my own companies, this isn't a versus at all. The deployment pattern that keeps winning is a split along one clean line. Power Automate owns everything that starts and ends inside Microsoft 365 — the approval flows, the SharePoint routing, the Teams notifications — where its native triggers and licensing already cover the ground. n8n owns everything that touches the outside world — the CRM sync, the AI pipelines, the webhook-driven glue between SaaS tools, anything needing a code step.

The seam between them is deliberately boring: a webhook. Power Automate can call an n8n webhook when an M365 event needs to trigger outside work; n8n can drop a file into SharePoint or post an approval request back into the Microsoft world when outside work needs an M365 ending. Each platform does the thing it's structurally best at, the premium-connector conversation mostly never happens because the cross-system work lives on the side with no connector tax, and the M365 users get the native experience they'd riot without. This is the same boring-core-sharp-edges instinct that runs through my whole workshop — the approval flow is core, the AI pipeline is edge, and they don't have to be the same tool.

Power Automate → open-source. No converter exists; you rebuild from a spec. The genuinely hard parts are the things Power Automate gave you for free: native M365 triggers become Graph API subscriptions or polling, and the approvals experience has to be rebuilt or — better — left behind on the Microsoft side per the hybrid pattern. Budget the rebuild per workflow, run both in parallel, and expect the flows with heavy SharePoint logic to take three times their estimate.

Open-source → Power Automate. Rarer, but it happens when a company standardizes on Microsoft governance. The hard part isn't rebuilding logic — it's discovering, connector by connector, which of your integrations are premium and what the flow's actual licensed cost will be. Do that audit first. Any code nodes need rethinking into expressions, Office Scripts, or an Azure Function, and anything AI-heavy should honestly stay behind — that category migrates badly in this direction.

Both directions reward the same discipline: a written inventory of triggers, systems touched, and monthly volumes before anyone rebuilds anything. It's the migration spreadsheet from the n8n vs. Make playbook with a licensing column added.

If your automation ambitions live inside Microsoft 365, use the Power Automate you're already paying for, enjoy the approvals experience, and watch the premium-connector line like a hawk. If your ambitions are AI-heavy, cross-SaaS, high-volume, or residency-constrained, open-source wins on the merits and the math. If — like most real businesses — you're both, run both, split along the M365 boundary, and join them with a webhook. And if you'd rather buy the outcome than operate either side of it, that's a legitimate call too — it's what my agency's done-for-you workflow automation exists for, with the standing disclosure that it's my company and you should weigh that accordingly.

I write these from the operator's seat — the Microsoft half of this post is funded by my MSP and the open-source half by my automation agency, which is the only reason you got both halves honestly. This extends the workflow bench of my Builder Notes; more on the blog, or get in touch.