Greta vs Make + Zapier: When AI Building Replaces Glue Code

TL;DR: Make and Zapier dominate the automation/glue-code category --- connecting apps to apps via visual workflows. Greta is an AI app builder generating full applications. They overlap when workflows grow complex enough that they really want to be applications rather than chains of automations. Make/Zapier win for: connecting existing SaaS apps via standard webhooks/APIs, simple workflows under 5--10 steps, situations where building full app is overkill. Greta wins when: workflow has its own data model, needs custom UI, hits Make/Zapier complexity ceiling, or you want to own the logic as code. This guide covers the real decision and the hybrid pattern that often works.

Introduction

Make (formerly Integromat) and Zapier dominate the automation category. Connect Gmail to Slack. Form submissions to CRM. Stripe payments to Notion. Calendar events to Discord. The category is huge --- companies pay $10--$500+/month for automation tools that connect their SaaS sprawl into workflows. Make and Zapier collectively serve millions of customers and run billions of automations.

Greta is an AI app builder that generates full applications from prompts. The category seems different at first --- building apps vs connecting apps. But there's increasing overlap. When a Make/Zapier workflow grows beyond 10 steps, has its own conditional logic, needs custom UI, manages state across runs, requires user accounts --- it's increasingly really an application. The 'glue code' grew into a system.

This guide covers where Make/Zapier genuinely excels, where they hit ceilings, and when Greta-built apps replace them. The honest framing is they're complementary tools serving overlapping but distinct use cases. The decision isn't binary; it's about matching the right tool to the right complexity.

The category difference

Make and Zapier are automation platforms --- they connect existing SaaS apps via standard interfaces (webhooks, APIs). The workflow lives in the platform; the data lives in the connected apps. You don't build a database in Zapier; you connect Zapier to Airtable, Google Sheets, or wherever data lives.

Greta is an app builder --- it generates new applications with their own data, UI, and logic. The application is the whole system. Where Zapier connects existing tools, Greta builds new tools.

Overlap happens when automation workflows grow into de facto applications --- when the 'workflow' needs its own database, custom UI, conditional logic that's hard to visualize, multi-step approvals, and user accounts. At that point, the workflow really wants to be an app.

Side-by-side comparison

When Make + Zapier win

• Connecting two or more existing SaaS apps via standard interfaces
• Simple workflows: trigger → 1--5 actions
• Workflows that don't need their own UI or data model
• Triggered by webhooks or app events
• Scheduled tasks (daily reports, weekly digests)
• Notification flows (Slack on form submission, email on payment, etc.)
• Data syncing between apps
• Quick prototypes of integrations to validate before building
• Non-technical users who can use visual builders but not code
• Workflows under 10 steps with linear logic

When Greta wins

• Building a real application customers use
• Workflows that have their own data model (more than just connecting existing data)
• Complex conditional logic that's hard to visualize
• Custom UI needed for users to interact with the workflow
• User accounts, permissions, multi-user workflows
• Long-running state across many interactions
• Workflows growing beyond 10--15 steps
• Hitting Make/Zapier complexity ceiling
• Need to own the logic as code (long-term plans)
• Want consistent tech stack across customer-facing and internal tools

Examples of each tool's sweet spot

Make/Zapier sweet spot examples

• Typeform submission → create Notion page → notify Slack --- Linear flow, existing app data
• Weekly digest → query Postgres → format → email --- Scheduled report
• New Stripe customer → add to Mailchimp → send welcome email → notify Slack --- Onboarding glue
• Calendar event created → block focus time → set Slack status --- Personal productivity
• Form submission → check responses → route to right team --- Lead routing
• GitHub PR merged → update Linear → notify in Slack --- Engineering team sync

Greta sweet spot examples

• Customer support portal with knowledge base, tickets, agent assignment --- Full app
• Recipe app for users to save and organize their recipes --- Custom data model + UI
• Internal CRM with custom workflow for your team --- Full application
• Subscription box management with custom pricing and curation --- Beyond automation
• Booking system with availability calendar --- Custom data and UI
• AI-powered analytics dashboard for clients --- Full application
• Multi-tenant B2B SaaS --- Far beyond glue code

The hybrid pattern (often the right answer)

Many indie SaaS use both. Greta for the core application (the product itself); Make/Zapier for integrations between the app and external services. The product lives in Greta; the glue between product and external SaaS lives in Make/Zapier.

Example hybrid stack

• Greta --- Builds the SaaS product (customer-facing app with auth, payments, data)
• Make/Zapier --- Connects events from app to external services: new signup → add to Mailchimp; payment received → notify in Slack; cancellation → log to spreadsheet
• Internal CRM (built in Greta) --- Operations team uses for daily work
• Make/Zapier --- Connects CRM events to communications and reporting

Why hybrid works

• Greta builds what's product-defining and complex
• Make/Zapier handles glue that connects to existing SaaS
• Don't reinvent glue when Zapier exists; don't oversimplify when full app is needed
• Each tool plays to strengths

Make/Zapier complexity ceiling: when to graduate

Signs that your Make/Zapier workflow really wants to be an application:

• More than 15 steps in a single workflow
• Multiple branches and conditional paths becoming visually complex
• Need for custom UI that users interact with
• Need to track state across many runs (not just data in connected apps)
• Custom data model emerging in your spreadsheet acting as 'database'
• User accounts and permissions becoming relevant
• Workflow taking too long to run (long chains have latency)
• Cost growing significantly (high-volume workflows on Zapier paid tiers add up)
• Maintaining the workflow taking significant operator time
• Edge cases mounting (workflow breaks in unexpected ways)

When you see 3+ of these signs, the workflow is approaching application territory. Consider whether building it as a real app (in Greta) would be lower long-term operational burden than continuing to expand the workflow.

Cost comparison at different scales

Migration pattern: Make/Zapier → Greta

• Identify the most complex workflow that's growing painful
• Document the workflow's logic in plain English
• Build as Greta app with proper data model
• Test in parallel with existing workflow
• Migrate trigger sources (webhooks pointed at new app instead of Make/Zapier)
• Decommission Make/Zapier workflow once new app proven
• Keep Make/Zapier for the simpler workflows that genuinely fit

Decision tree

• Connecting 2--3 existing SaaS via standard interfaces? → Make/Zapier
• Building a real product customers will use? → Greta
• Workflow has its own data model? → Greta
• Workflow needs custom UI? → Greta
• Simple integration glue between SaaS? → Make/Zapier
• Workflow growing complex over 15+ steps? → Greta
• Workflow handled fine by linear flow? → Make/Zapier
• Building internal tool for ops team? → Greta
• Want code ownership for long-term plans? → Greta
• Just need quick automation that exists once? → Make/Zapier

Common Mistakes Choosing Between Them

• Trying to build everything in Make/Zapier --- Eventually hits complexity ceiling. Know when to graduate to app.
• Building simple integrations in Greta --- Overkill when Zapier handles it in minutes.
• Treating them as competitors --- They're complementary tools for different jobs. Use both as appropriate.
• Stuck in Make/Zapier when workflow demands app --- Operational burden grows; consider migration.
• Skipping the hybrid approach --- Most indie SaaS benefit from both tools in the stack.
• Picking based on price alone --- At small scale, free Zapier vs paid Greta seems cheap; doesn't account for what each enables.
• Trying to do business logic in Zapier --- Some logic belongs in code; visual builder can't express it cleanly.
• Ignoring code ownership --- Make/Zapier workflows are platform-hosted. Greta produces code you own.
• Migration paralysis --- Once workflow outgrows Zapier, delaying migration compounds the pain.
• Underestimating Zapier limits --- Workflows can be built in Zapier but maintenance burden grows. Know when to graduate.

Frequently Asked Questions

Q1: Can I build a real SaaS in Zapier? Some have tried, with mixed results. Zapier and Make can serve as backend for very simple SaaS where logic is genuinely just connecting existing apps. As soon as you need custom UI, user accounts, complex data --- you've left their territory. For real SaaS, build the app properly.

Q2: Can Greta replace my Zapier subscription? Sometimes. If your Zapier usage is primarily one complex workflow that should be an app, rebuilding in Greta can eliminate the Zapier subscription. If Zapier is doing varied glue across many simple workflows, keeping it is usually right.

Q3: What about n8n (self-hosted Make alternative)? n8n is similar category to Make/Zapier (automation/glue code), with self-hosting option. Same decisions apply --- use for glue, graduate to apps when complexity demands.

Q4: For someone learning, which should I start with? Depends on goal. Learning automation and integration thinking: Zapier (free tier; massive ecosystem). Learning to build apps: Greta or similar app builders. Many builders use both throughout their journey.

Q5: Does Make/Zapier integrate with Greta apps? Yes --- your Greta app can expose webhooks that Make/Zapier consume. Or Make/Zapier can call your app's API. They integrate cleanly because both speak standard webhook/HTTP.

Q6: What about complex logic in Zapier (paths, formatters, code steps)? Zapier supports code steps and complex paths, which extends what's possible. But the maintenance and debuggability of complex workflows in visual builders becomes harder than equivalent logic in code. At a certain complexity, code wins on understandability and debuggability.

Q7: Will AI replace Make/Zapier? AI features are increasingly built into automation platforms (Zapier AI Actions, Make AI agents). Doesn't replace the platforms; enhances them. The 'connect SaaS apps' category remains valuable regardless of how AI evolves the implementation.

Conclusion

• Make/Zapier and Greta serve different categories despite overlap. Make/Zapier connect existing SaaS apps via visual workflows. Greta generates full applications from prompts.
• Make/Zapier win for: connecting 2--3 SaaS via standard interfaces, simple linear workflows, scheduled tasks, notification flows, situations where no UI is needed.
• Greta wins for: building real applications, complex workflows that should be apps, custom UI requirements, user accounts and permissions, situations hitting Make/Zapier complexity ceiling.
• Hybrid is often right. Greta for the product; Make/Zapier for glue between product and external SaaS. Most indie SaaS benefit from both in the stack.

Match the right tool to the right complexity. Simple SaaS-to-SaaS integration in 3--5 steps? Zapier solves it in minutes. Workflow that has its own data model, UI, and 20+ steps? It's an app --- build in Greta. The successful builders in 2026 use the right tool for each job and don't try to force any single tool to do everything.