> ## Documentation Index
> Fetch the complete documentation index at: https://developer.transactbridge.com/llms.txt
> Use this file to discover all available pages before exploring further.
> Choose the right checkout integration for your subscription business.
# Different checkout integrations
# Checkout Solutions for Subscription Businesses
Transact Bridge provides three checkout solutions for collecting subscription payments. All options support recurring billing while allowing businesses to choose the integration approach that best matches their customer experience and technical requirements.
Generate a hosted subscription payment link and share it with customers via email, SMS, WhatsApp, or any other communication channel.
Embed the Transact Bridge checkout directly within your website or application to provide a seamless in-app payment experience.
The **Drop-in Checkout** solution provides greater flexibility and customization compared to a traditional iframe integration. While both options allow customers to complete payments without leaving your website, Drop-in Checkout offers tighter integration with your application's user experience.
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## 1. Payment Link
A hosted checkout page that can be generated using the Billing Session or Subscription APIs and shared with customers.
### Business Use Cases
| Business | Use Case | Benefit |
| ------------------ | ----------------------------------------------------------------------- | ------------------------------- |
| SaaS | Send subscription renewal links to customers | No website integration required |
| EdTech | Share course subscription links through email or WhatsApp | Quick customer onboarding |
| OTT Platform | Offer monthly or yearly subscription links | Fast payment collection |
| Fitness Membership | Send membership renewal reminders with payment links | Improves renewal rate |
| B2B Software | Sales team manually shares subscription links with enterprise customers | Suitable for assisted sales |
**Payment Link** is ideal for businesses that need the fastest integration or collect payments through email, SMS, WhatsApp, invoices, or other offline channels.
Choose Payment Links when customers do not necessarily begin their journey from your website or when your sales process is assisted by your sales or support team.
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## 2. Iframe
The Iframe Checkout SDK is a JavaScript-based iframe Payment SDK that allows merchants to easily embed the checkout experience directly inside their application or website without the customer leaving your platform.
### Business Use Cases
| Business | Use Case | Benefit |
| --------------------- | ---------------------------------------- | ----------------------------- |
| SaaS Platform | Customer upgrades from Basic to Pro plan | Seamless checkout experience |
| Cloud Services | Customer purchases additional credits | No page redirection |
| Gaming Platform | Subscribe to premium membership | Higher conversion rate |
| Productivity Software | Purchase monthly or annual subscription | Consistent branded experience |
| Streaming Platform | Upgrade subscription plan | Reduced checkout abandonment |
**Iframe Checkout** is suitable for businesses that want to embed a secure payment form within their website with minimal implementation effort.
Also, when maintaining your application's branding and minimizing customer redirections are important.
## 3. Drop-in Checkout for Subscription Businesses
TBDropin is a JavaScript-based Drop-in Payments SDK that allows merchants to easily embed secure & PCI-compliant payment components into their applications.
It provides pre-built payment elements with flexibility of styling them (UPI, Cards, T\&C, etc.) and ensuring sensitive payment data never touches the merchant’s servers to adhere to compliances.
With a simple script include and a few lines of JavaScript, merchants can:
* Create their own checkout experience with pre-built payment components
* Collect payment details securely without handling sensitive data on their servers
* Trigger payments with a unified pay() API to handle all payment methods
* Receive payment status updates through webhooks & SDK events for real-time processing
### Business Use Cases
| Business | Subscription Scenario | Why Drop-in Checkout? |
| --------------------- | ----------------------------------------------------- | ----------------------------------------------------------------------------------------- |
| SaaS Platform | Customer subscribes to Basic, Pro or Enterprise plans | Embedded checkout provides a seamless upgrade experience without leaving the application. |
| AI Platform | User purchases monthly AI credits | Keeps users inside the product during subscription activation. |
| Streaming Platform | Monthly or annual content subscription | Branded checkout improves customer trust and conversion. |
| Gaming Platform | Premium membership purchase | Smooth in-app payment experience with recurring billing support. |
| Productivity Software | Upgrade from Free to Premium | Customers complete payment without page redirects. |
| Membership Portal | Paid community or professional membership | Simple onboarding and automatic recurring renewals. |
**Drop-in Checkout** is recommended for businesses seeking a highly customizable, seamless checkout experience with greater control over the customer journey, UI interactions, and subscription workflows.
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