Google Apps Script vs Zapier: When Free Beats £30/Month

The Quick Answer

If most of your automation happens inside Google Workspace (Sheets, Gmail, Calendar, Drive, Docs), Google Apps Script can do what Zapier does, for free. If you need to connect dozens of non-Google apps with zero coding, Zapier is the easier choice.

But here’s what most comparison articles won’t tell you: the real cost of Zapier isn’t the monthly fee; it’s what happens when you scale.

What Is Google Apps Script?

Google Apps Script is a free, cloud-based JavaScript platform built directly into Google Workspace. It has full access to every Google service (Sheets, Gmail, Drive, Calendar, Docs, Forms, Slides) and can make HTTP requests to external APIs.

It runs on Google’s servers. There’s nothing to install, no hosting to manage, and no subscription to pay.

If you use Google Workspace (and millions of UK businesses do), you already have it.

What Is Zapier?

Zapier is a no-code automation platform that connects over 7,000 apps through a visual drag-and-drop builder. You create “Zaps”, which are workflows that trigger when something happens in one app and perform actions in another.

It’s powerful, easy to get started with, and great for connecting apps that don’t talk to each other natively.

The catch? It gets expensive quickly.

The Real Cost Comparison

Here’s what Zapier’s pricing looks like in 2026:

Plan	Monthly Cost	Tasks Included	Cost Per Extra Task
Free	£0	100 tasks	N/A (hard limit)
Professional	£29.99	750 tasks	Scales with usage
Team	£103.50	2,000 tasks	Scales with usage
Enterprise	Custom	Custom	Custom

A “task” is a single action. If your Zap has 5 steps, that’s 5 tasks per run. A workflow that runs 20 times a day with 5 steps = 100 tasks/day = 3,000 tasks/month. That puts you on the Team plan at over £100/month for a single workflow.

Google Apps Script cost for the same automation: £0.

Not £0 for a trial. £0 forever. It runs on your existing Google Workspace account.

Where Apps Script Wins

1. Deep Google Workspace Integration

Zapier connects to Google Sheets, Gmail, and Calendar, but only at a surface level. You can read rows, send emails, and create events.

Apps Script has full API access. You can:

Format cells, merge ranges, create custom formulas
Parse email bodies, manage labels, handle attachments
Build custom menus inside Sheets and Docs
Create entire web applications using Google’s infrastructure
Access metadata that Zapier simply can’t see

2. No Per-Task Pricing

Apps Script doesn’t charge per execution. Whether your script runs once a day or once a minute, it costs nothing beyond your Workspace subscription.

For businesses with high-volume automations (processing hundreds of form submissions, sorting thousands of emails, syncing data across multiple sheets); this alone saves hundreds of pounds per month.

3. Custom Logic Without Limits

Zapier’s conditional logic (Paths and Filters) is useful but limited. Complex business rules (multi-level approvals, dynamic routing based on data lookups, error handling with retry logic) quickly become unwieldy or impossible in Zapier’s visual builder.

Apps Script is JavaScript. If you can describe the logic, you can build it.

4. You Own the Code

When you build with Apps Script, you own every line. You can version it, audit it, hand it to another developer, or modify it yourself.

With Zapier, your workflows live on Zapier’s platform. If you cancel, they stop. If Zapier changes their API connections (which happens), your workflows break and you’re at their mercy for a fix.

Where Zapier Wins

1. Non-Google App Connections

If you need to connect Shopify to Slack to HubSpot to Trello, Zapier’s pre-built connectors are genuinely useful. Apps Script can call external APIs via UrlFetchApp, but you’d need to write and maintain those integrations yourself.

2. Speed to First Automation

Zapier’s visual builder gets you from zero to working automation in minutes with no code. Apps Script requires JavaScript knowledge (or a developer).

3. Team Visibility

Zapier’s dashboard shows all your team’s automations in one place with usage stats and error logs. Apps Script projects can be scattered across different Google files.

The Sweet Spot: Who Should Use What

Use Apps Script if:

Your workflow lives mostly inside Google Workspace
You’re hitting Zapier’s task limits or budget ceiling
You need complex logic, custom formatting, or deep integrations
You want to own your automation code
You value long-term cost predictability

Use Zapier if:

You’re connecting many non-Google apps
Your automations are simple (2-3 step workflows)
Nobody on your team writes code
You need something running in the next 10 minutes

Use both if:

You have complex Google Workspace automations (Apps Script) AND need to trigger/connect to external platforms (Zapier as the bridge)

The Verdict

For UK businesses running Google Workspace, paying £30-100+/month for Zapier to automate tasks that Apps Script handles for free is like paying rent on a house you already own.

The barrier isn’t the technology; it’s knowing how to build it properly. A well-built Apps Script automation runs reliably for years with zero ongoing cost. A Zapier workflow doing the same job costs you every single month.

Need Help Making the Switch?

At Empower Automation, we specialise in Google Apps Script development for UK businesses. We’ve saved our clients over 80,000 hours of manual work with custom-built automations that run on their existing Google Workspace, with no subscriptions, no per-task fees.

If you’re spending more than £30/month on Zapier and most of your tools are Google-based, there’s a good chance we can replace those workflows with something faster, cheaper, and entirely yours.

Book a free 15-minute automation audit →

We’ll look at what you’re currently paying for and tell you honestly what’s worth moving and what isn’t.

Nicola Berry is the founder of Empower Automation, based in Falkirk, Scotland. She builds bespoke Google Apps Script solutions for businesses across the UK.