Can I vibe code Subify?
subify.com ↗·recurring-billing·$9/mo·tiered
NICHE — BUILD THE NICHE VERSION
When paying for Subify, you pay for a pre-built Shopify Theme App Block, an admin UI for creating Selling Plan Groups, and a customer self-serve portal. Because Shopify handles vaulting credit cards and creating recurring orders via its GraphQL Admin API, you do not need to write a billing execution engine or handle PCI compliance. The technical core is creating selling plans via GraphQL and exposing contract management actions to the customer portal. Building this yourself requires a simple Remix app embedded in Shopify Admin and a Customer Account Extension.
The verdict
NICHEReplaces
$49/mo
Vibe code score
6/10
MVP build time
1 week
Full replacement
3-6 months, driven by theme compatibility edge cases, customer portal UI extensions, and dunning retry logic
Editorial opinion, produced with a published methodology from public information. Not a statement of fact about the vendor. How we score · Report an error · Pricing checked 2026-08-30
01
Why this verdict
Shopify handles PCI compliance, payment vaults, and automated recurring billing directly through its Subscription API. Subify is primarily an administrative UI to generate Selling Plans, a theme widget, and a customer management portal.
Verdict
NICHE
Vibe code score
6/10
Moat strength
3/10
02
What it really costs
Sticker price versus what a real store ends up paying.
| Essential | $9/mo | Basic subscription widget with a 1% transaction fee |
| Pro | $49/mo | Advanced rules, custom portal, and 0.75% transaction fee |
| Premium | $99/mo | Lower transaction fee, custom styling, priority support |
Charges a monthly subscription plus a percentage-based transaction fee on recurring orders.
- Captured
- 2026-08-30 (26 days ago)
- Verified by
- crawler
- Source
- subify.com
Assumptions: Charges a monthly subscription plus a percentage-based transaction fee on recurring orders.
03
The one-shot build prompt
Paste it into your agent of choice. Nothing else needed.
Build a Shopify subscription management embedded app using the official Shopify Remix App Template and GraphQL Admin API. 1. DATA & APIS: Use Shopify's native Subscription API. Do not store credit card numbers or process payments directly. Implement GraphQL calls for `sellingPlanGroupCreate`, `sellingPlanGroupUpdate`, and `subscriptionContractUpdate`. Maintain a local database in PostgreSQL to log contract events, customer notifications, and dunning attempt histories. 2. FRONTEND & ADMIN UI: Build an embedded admin UI using Shopify Polaris. Allow merchants to create Selling Plan Groups defining delivery frequencies (e.g., every 30 days), discount percentages (e.g., 10% off), and assigned product variants. 3. STOREFRONT & WIDGET: Create a Theme App Extension (Liquid + Web Components) that injects subscription plan selectors on the product detail page. Update the store's cart payload with the selected `selling_plan` ID. 4. CUSTOMER PORTAL: Implement a Customer Account UI Extension for Shopify's new customer accounts. Render active subscription contracts. Allow users to: skip next order, pause/resume contract, swap variant IDs, and request a payment update link via Shopify's `subscriptionContractSendUpdatePaymentMethodEmail` mutation. 5. WEBHOOKS & DUNNING: Register webhook handlers for `subscription_contracts/create`, `subscription_contracts/update`, and `subscription_billing_attempts/failure`. On payment failure, trigger a dunning flow that retries billing via `subscriptionBillingAttemptCreate` according to a 3-day retry schedule and sends notification emails via SendGrid API. Out of scope: Custom payment vaulting or non-Shopify payment gateways.
$ each button prefixes agent-specific run instructions · build your own product, never copy proprietary code, trademarks or designs
04
Scorecard
Deterministic scoring, same method for every product.
Vibe code score
6/10
Moat strength
3/10
05
What you keep, what you lose
The honest trade of rebuilding it yourself.
What you can actually replace
- ✓Selling Plan Group creation and product assignment
- ✓Product page subscription options widget
- ✓Customer self-serve portal for skip, pause, and cancel actions
- ✓Product swap and delivery frequency modifications
- ✓Basic dunning notifications for failed billing attempts
What you lose
- ×Pre-configured Shopify Theme App Extensions for instant theme deployment
- ×Out-of-the-box email templates for subscription status notifications
- ×Turnkey customer portal interface without custom CSS design work
- ×Built-in contract migration tools from competitor apps like Recharge
- ×Pre-built integrations with third-party apps like Klaviyo and Gorgias
06
Why people still pay — the real moats
Moats
- — Seamless installation across hundreds of edge-case Shopify liquid themes
- — Deep ecosystem integrations with marketing and support tools
- — Historical churn analytics and retention reporting dashboards
Hard parts
- — Correctly calling Shopify GraphQL mutations for SellingPlanGroupCreate and SubscriptionContractUpdate
- — Building a responsive Customer Account UI Extension compatible with Shopify's New Customer Accounts
- — Handling asynchronous payment failure webhooks and orchestrating retry intervals
- — Ensuring subscription price overrides and discount codes apply cleanly across multi-currency setups
- — Supporting customers with payment failures and expired card updates manually
- — Exporting and converting legacy payment token data when switching apps
- — Testing UI widgets against bespoke custom Shopify themes
- — Maintaining compliance with regional recurring subscription disclosure laws
Build this instead
Build this instead
Build this instead
07
Prior art — do not start from zero
Existing projects and paid alternatives worth pricing first.
Shopify Subscription Sample App↗
Official reference implementation by Shopify for building subscription apps using GraphQL Admin API.
github.com
KillBill↗
Open-source subscription billing and payment management platform.
github.com
Lago↗
Open-source billing and metering API designed for recurring and usage-based models.
github.com
08
Open source alternatives to Subify
Self-hostable projects that cover most of the same ground. Free licence, your infrastructure, your on-call.
KillBill↗
Apache-2.0Enterprise-grade self-hosted billing engine with complex recurring payment logic.
github.com
Lago↗
AGPL-3.0Modern API-first billing engine for managing plans, coupons, and recurring invoices.
github.com
Crater↗
AGPL-3.0Self-hosted web and mobile app to manage invoices, payments, and recurring bills.
github.com
09
Have you actually replaced it?
One click, no account. It moves the ranking.
10
Compare
Same category, different trade-offs.
Appstle orchestrates recurring orders, subscription boxes, and dunning workflows natively on e-commerce platforms like Shopify, replacing basic billing logic with customizable customer portals and checkout extensions.
$10/mo
PayWhirl provides recurring billing, payment processing, and flexible subscription management portals for e-commerce platforms like Shopify and BigCommerce.
$49/mo
Relo calculates predictive replenishment dates for consumer products and triggers personalized reorder and subscription conversion links directly inside email and SMS marketing channels.
$99/mo
11
FAQ
+Can I really replace Subify with an AI-generated app?
YES — THIN WRAPPER OVER SHOPIFY SELLING PLANS API. Shopify handles PCI compliance, payment vaults, and automated recurring billing directly through its Subscription API. Subify is primarily an administrative UI to generate Selling Plans, a theme widget, and a customer management portal. An MVP takes roughly 1 week; matching the product properly is closer to 3-6 months, driven by theme compatibility edge cases, customer portal UI extensions, and dunning retry logic.
+How long does it take to rebuild Subify?
A usable internal version: 1 week. A version you would sell or bet a business on: 3-6 months, driven by theme compatibility edge cases, customer portal UI extensions, and dunning retry logic, mostly spent on correctly calling shopify graphql mutations for sellingplangroupcreate and subscriptioncontractupdate.
+What do you actually lose by leaving Subify?
Pre-configured Shopify Theme App Extensions for instant theme deployment Out-of-the-box email templates for subscription status notifications Turnkey customer portal interface without custom CSS design work
+Is it legal to build a Subify alternative?
Building a competing product with your own code is normal competition. Copying their code, trademarks, brand assets or scraping their platform is not. Use the prompt to build your own implementation of common features.
Written by EcomReStack research agent — 18 years in the Magento ecosystem. Last reviewed 2026-08-30.
Scores are computed, not typed. Read the methodology.
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