Apps Script vs Office Scripts & Power Automate

Microsoft's equivalent of Google Apps Script is Office Scripts, paired with Power Automate. Office Scripts lets you write TypeScript that automates an Excel workbook in the cloud. Power Automate supplies what Apps Script has built in: schedules, triggers, and connections to email and other apps. VBA is the older Microsoft equivalent, but it runs only in desktop Excel. So the honest one-line comparison is that Apps Script is one product, and Microsoft splits the same job across two (or three).

That split matters more than any feature list. It decides what you pay, where your automation can break, and who in the team can maintain it. Below we compare all three Microsoft options with Apps Script, build the same small automation on both sides, and say plainly which ecosystem fits which business. Short version: use the one that matches the suite your company already runs on.

The quick answer, mapped

You want to…	Google	Microsoft
Write code that changes a spreadsheet	Apps Script	Office Scripts (cloud) or VBA (desktop)
Run it on a schedule	Apps Script time-driven trigger	Power Automate scheduled flow
Run it when a cell is edited	Apps Script onEdit	VBA Worksheet_Change (desktop only). Office Scripts has no edit event
Run it when an email or form arrives	Apps Script + GmailApp / form submit trigger	Power Automate trigger + "Run script" action
Call an outside API	UrlFetchApp	A Power Automate HTTP connector (fetch fails in a script run from Power Automate)
No-code builder	AppSheet automation	Power Automate

Office Scripts: the direct counterpart

Office Scripts is the closest thing Microsoft has to Apps Script. Scripts are written in TypeScript or JavaScript, edited in a browser-based editor, and run against the workbook in the cloud. An action recorder turns your clicks into editable code, much like the macro recorder in Google Sheets does for Apps Script.

What it does well: cleaning up imports, reformatting reports, building tables and pivots, anything that's "the same twenty clicks every Monday". Colleagues can run a shared script from a button in the workbook.

What it doesn't do, and why it's not a full equivalent:

• It only automates Excel. There is no Office Scripts API for Outlook, Word or Teams. To email the result, you need Power Automate.
• It has no event triggers of its own. No "on edit", no "on open". Microsoft's docs also say script scheduling inside Office Scripts is temporarily disabled and point you to Power Automate for scheduled runs instead.
• No external libraries. Only the Office Scripts APIs and built-in JavaScript objects.
• Licensing. Microsoft lists the qualifying licences: Office 365 Business, Business Premium, ProPlus, A3, A5, E1, E3, E5 and F3, plus OneDrive for Business. On personal and family plans it's still a preview through the Insider program.

VBA: the desktop veteran

VBA is what most people mean by "Excel macros", and it's still the most capable way to automate desktop Excel: event handlers (Workbook_Open, Worksheet_Change), user forms, access to the file system and other Office apps on the same PC.

The catch is where it runs. Microsoft's own support page says you can't create, run or edit VBA macros in Excel for the web. You can open a macro-enabled workbook in the browser, but the macros just sit there. So VBA automation works only when someone has the file open in desktop Excel. Nothing runs at 6 a.m. on its own unless a PC is left on with a scheduled task.

That's the main reason teams look at Apps Script or Office Scripts at all. They don't need a better macro language. They need automation that runs without a person and a laptop.

Power Automate: the glue (and the bill)

Power Automate is Microsoft's flow builder, much closer to Zapier or Make than to Apps Script. You pick a trigger (a schedule, a new email, a new SharePoint item), chain actions together, and one of those actions can be "Run script" to call an Office Script.

What the licence pages actually say, as of October 2026:

• Microsoft 365 licences include limited Power Automate rights: cloud flows with standard connectors, 6,000 actions per user per day, no premium or custom connectors. The Excel Online (Business) connector that runs Office Scripts is a standard connector.
• Power Automate Premium is $15 per user per month, paid yearly, and Process is $150 per bot per month (Microsoft pricing page). Premium adds premium and custom connectors, desktop RPA and a 40,000 daily action limit.
• Calling arbitrary APIs usually means premium. The HTTP with Microsoft Entra ID connector is classed Premium in Power Automate.
• Idle flows can be switched off. A flow that isn't triggered for 90 days may be turned off unless its owner has a premium or capacity licence. Owners get warned 30 days before.

The Office Scripts limits when a flow calls them are tighter than most people expect: 1,600 Run script calls per user per day, a 120-second timeout on synchronous calls, and fetch doesn't work inside a script run from Power Automate. The connector also allows at most 3 Run script calls per 10 seconds.

Side by side: language, triggers, cost

	Google Apps Script	Office Scripts	VBA	Power Automate
Language	JavaScript	TypeScript / JavaScript	Visual Basic	No-code (expressions)
Runs where	Google's servers	Microsoft cloud (Excel web) or Excel desktop	Desktop Excel only	Microsoft cloud
Scope	Sheets, Gmail, Drive, Docs, Calendar, Forms, any HTTP API	Excel workbook only	Excel + local Office apps	Hundreds of connectors
Edit trigger	onEdit (simple and installable)	None	Worksheet_Change	Indirect, via connectors
Schedule	Built in, every 1 minute to monthly	Via Power Automate	Needs a PC left on	Built in, minimum 60 seconds
Max single run	6 minutes	120 s when called from a flow	Until the PC stops	Flow-level limits
Daily ceilings	90 min trigger runtime (Gmail) / 6 h (Workspace)	1,600 flow calls per user	None (local)	6,000 actions (M365) / 40,000 (Premium)
Price to start	$0 with any Google account	Included in qualifying M365 business plans	Included with desktop Excel	Standard connectors included in M365; Premium $15/user/mo yearly

Apps Script figures are from Google's quotas page and installable triggers guide. We go through the Google-side costs in detail in what Apps Script really costs.

The same task on both sides

Take a common job: every morning, collect yesterday's open orders from a sheet and email the manager a summary.

On Google, it's one script and one trigger:

function morningSummary() {
  const rows = SpreadsheetApp.getActive()
    .getSheetByName('Orders')
    .getDataRange()
    .getValues()
    .slice(1);                                   // skip header
  const open = rows.filter(r => r[3] === 'Open');
  const body = open.map(r => `${r[0]}  ${r[1]}  ${r[2]}`).join('\n');
  MailApp.sendEmail('manager@yourcompany.com',
    `${open.length} open orders`, body || 'Nothing open.');
}

function installTrigger() {                      // run once
  ScriptApp.newTrigger('morningSummary')
    .timeBased().everyDays(1).atHour(7).create();
}

Run installTrigger once, approve the permissions, and it runs every day around 7 a.m. with nobody signed in. Total cost on a free Gmail account: nothing. The only ceiling that matters here is email: 100 recipients a day on Gmail, 1,500 on Workspace.

On Microsoft, it's two pieces. First the Office Script, which reads the table and returns the summary:

function main(workbook: ExcelScript.Workbook): string {
  const values = workbook.getWorksheet('Orders')
    .getUsedRange()
    .getValues()
    .slice(1);
  const open = values.filter(r => r[3] === 'Open');
  return `${open.length} open orders\n` +
    open.map(r => `${r[0]}  ${r[1]}  ${r[2]}`).join('\n');
}

Then a Power Automate flow: a Recurrence trigger at 07:00, an Excel Online (Business) Run script action pointing at the workbook in OneDrive or SharePoint, and an Outlook Send an email action using the script's result. All three are standard connectors, so a Microsoft 365 business user can build it without Premium.

Both work. The difference shows up later, when someone needs to change it. On Google the logic, schedule and email live in one file. On Microsoft they live in three places (script, flow, connections) under potentially different owners, and a renamed workbook or a lapsed connection breaks the chain. We see the same pattern when comparing Apps Script with Zapier, Make and n8n: the more pieces a workflow has, the more places it can fail without anyone noticing.

Which ecosystem for whom

Stay on Microsoft if your company already runs on Microsoft 365. Your identity, files and email are there. Office Scripts plus Power Automate with standard connectors covers most spreadsheet automation at no extra licence cost, and fighting your own permission stack to save on tooling rarely pays. The same rule applies to app builders, as we explain in AppSheet vs Power Apps.

Keep VBA where it already works. A desktop macro that one analyst runs on demand doesn't need replacing just because it's old. Rewrite it when it has to run unattended, in a browser, or for people who don't have desktop Excel.

Choose Apps Script if you're on Google Workspace, or if most of your work sits in Gmail, Drive and Sheets. You get schedules, edit triggers, email, documents and outside API calls in one place, with no premium tier and no per-user automation licence. The limits are real (6 minutes per run, daily trigger runtime, email quotas), but they're published and predictable. If you need screens and forms more than logic, compare it with Google's no-code option in AppSheet vs Apps Script.

Watch for the mixed case. Plenty of businesses use Outlook for email but keep shared data in Google Sheets, or the reverse. Apps Script can reach Microsoft Graph over HTTP, and Power Automate has a standard Google Sheets connector that reads and writes rows (it has actions only, no "row added" trigger), but either way you're automating across a boundary. It works, but each extra connection is one more thing that can break. If you're about to change suites anyway, plan the automation move along with it.

Where we'd honestly tell you not to move: heavy Excel modelling with Power Query and Power Pivot, workbooks built around desktop add-ins, or a team whose whole working day is in Teams and SharePoint. Google Sheets isn't a drop-in replacement for those, and saving on licences won't cover the cost of retraining everyone.

Migrating from Excel automation to Apps Script

If you've decided to move, the order that works:

1. Inventory first. List every macro, Office Script and flow, who runs it and how often. In the workbooks we've audited, a good share of macros turn out to be unused or duplicated.
2. Rewrite, don't translate. VBA's object model (Range("A1").Value) and Apps Script's (getRange('A1').getValue()) look similar but behave differently, especially around reading and writing in bulk. Write the Apps Script version to read the whole range once and write once.
3. Replace events deliberately. Worksheet_Change becomes onEdit. Power Automate schedules become time-driven triggers. Email triggers become a Gmail search on a timer.
4. Check the quotas against your volume before go-live, especially email recipients and daily trigger runtime.
5. Run both in parallel for a week and compare the output.

For larger moves, our Apps Script development service covers exactly this: inventory, rewrite, and a handover your team can maintain.

Want help deciding, or moving?

If you have years of Excel macros and you're weighing a move to Google Workspace, or the reverse, start with an honest inventory of what your automation really does. That decides the answer more than any feature table.

• Book a free 30-minute discovery call. Bring a list of your macros and flows. We'll tell you which move cleanly, which need redesign, and when staying on Microsoft is the better call.
• Message us on WhatsApp with a one-line description of your most important macro. We'll reply with how it would look in Apps Script.