Postscript vs Retainful
A side-by-side comparison for e-commerce sellers — platforms, pricing, free trials and ROI.
| Category | Email & SMS | Email & SMS |
|---|---|---|
| Platforms | Shopify DTC | Shopify WooCommerce DTC |
| Pricing | Free trial; usage-based, paid plans from $100/mo | — |
| Free trial | Yes | Yes |
| Affiliate program | Direct | — |
| ROI | Turns SMS into a measurable revenue channel, with top brands earning a strong multiple on every dollar of texting spend. | Run automated cart-recovery and win-back flows across three channels to recover abandoned revenue and turn one-time buyers into repeat customers. |
Which should you choose?
Shopify and Shopify Plus DTC brands that want SMS as a dedicated, high-converting revenue channel.
Shopify and WooCommerce stores that want cart recovery and retention automation across email, SMS and WhatsApp from one tool.
Postscript
Pros
- Deeply integrated with Shopify and Shopify Plus data
- Strong compliance and deliverability for US texting
- Conversational selling features drive measurable replies and revenue
Cons
- Shopify-only, so not an option for WooCommerce or Amazon sellers
- Usage-based pricing plus message costs add up at scale
- SMS-focused, so you still need a separate email tool
Retainful
Pros
- Combines email, SMS and WhatsApp in a single dashboard
- Strong focus on revenue recovery and repeat-purchase automation
- Free plan with no credit card required to start
Cons
- Entry pricing not shown on the homepage
- Geared mainly to Shopify and WooCommerce stores
Other tools to consider
Email & SMS marketing built on unified customer data for ecommerce
Collect, manage, and display product reviews and UGC for ecommerce
AI marketing copilot for product descriptions and brand-voice copy at scale
AI-driven ecommerce personalization and product recommendations for Shopify brands
Easy, low-cost mass SMS marketing with automation and keywords
Influencer, affiliate and referral programs that turn customers and creators into a sales channel