Zapier vs custom integration: which should you use?

Zapier is a no-code tool: you pick a trigger in one app (a new form submission) and actions in others (create a CRM contact, send a Slack message). Zapier runs it on its servers. A custom integration is code written for your systems, talking to their APIs directly, running on hosting you control.

Both move data between tools. The difference is who builds it, who runs it, how it fails and how the cost grows.

More often than developers like to admit. Zapier suits:

• Simple workflows: one trigger, a few actions, little logic.
• Low or moderate volumes, where task-based pricing stays sensible.
• Popular tools that already have Zapier connectors.
• Testing an idea before investing in building it properly.
• Teams without a developer who need to change the workflow themselves.

When the connection matters too much to be fiddly. Typical signs:

• Volume: thousands of runs a month, and the task bill keeps climbing.
• Reliability: orders, payments or leads where a missed run costs money.
• Logic: lots of branches, lookups, data clean-up or rules that turn a Zap into a maze.
• Speed: you need data to move instantly, not on a schedule.
• Data control: you'd rather personal data didn't pass through another third party.
• No connector: one of your systems isn't on Zapier, or its connector doesn't do what you need.

Work through these six steps for each workflow, not for the business as a whole.

1. 1Write the workflow down: the trigger, every step, and what should happen when something fails.
2. 2Estimate the volume: how many runs a month now, and in a year.
3. 3Rate the risk: what does one missed run cost? A lost lead, a missed order, a wrong invoice?
4. 4Check the connectors: are all your tools on Zapier, and do their connectors do what you need?
5. 5Compare the cost over a year or two: the Zapier plan at your volume against a build plus care.
6. 6Choose per workflow. Keep the simple ones in Zapier, and build the critical ones properly.

Start with the Zap that hurts most: the most expensive, the most fragile or the most important. Document what it does, build the replacement, run both side by side for a short while and compare results, then switch the Zap off. Keep the rest in Zapier until they're worth moving.