Klaviyo vs Postscript
Klaviyo
AI-powered e-commerce email and SMS marketing platform with advanced segmentation.
eCommerce brands running multi-channel campaigns who need advanced segmentation, email integration, and AI-powered personalization
Postscript
Dedicated SMS marketing platform built for eCommerce with 2-way messaging and simple campaign management.
eCommerce businesses prioritizing SMS as primary marketing channel who want dedicated 2-way messaging and faster setup time
Short Answer
Klaviyo is a comprehensive marketing automation platform with SMS as a core feature, offering advanced segmentation (45+ filters) and AI-driven tools, while Postscript is a dedicated SMS-first platform optimized specifically for eCommerce SMS campaigns with simpler setup and 2-way messaging focus.
Our Verdict
AI-assistedChoose Klaviyo if you need a unified marketing platform with advanced segmentation, AI-powered personalization, and email integration alongside SMS—ideal for brands managing multi-channel campaigns at scale. Choose Postscript if you want a dedicated SMS solution with straightforward 2-way messaging, faster SMS-specific setup, and simpler campaign management for brands focused primarily on text marketing.
Was this verdict helpful?
Choose Klaviyo if
eCommerce brands running multi-channel campaigns who need advanced segmentation, email integration, and AI-powered personalization
Choose Postscript if
eCommerce businesses prioritizing SMS as primary marketing channel who want dedicated 2-way messaging and faster setup time
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Key Differences at a Glance
Key Facts & Figures
| Metric | Klaviyo | Postscript | Diff |
|---|---|---|---|
| Starting Price (Entry Tier)(USD/month) | $20/month | — | — |
| Cost at 5,000 Contacts/Profiles(USD/month) | $100/month | — | — |
| Cost at 50,000 Contacts/Profiles(USD/month) | $720/month | — | — |
| Monthly Email Send Limit (Entry Plan)(emails/month) | 5,000+ | — | — |
| Average eCommerce Email Revenue Per Send(USD) | $72 | — | — |
| Starting Price (Email Only)(USD/month) | $20/month (500 contacts) | — | — |
| eCommerce Email Automation ROI(%) | 4,200% ROI (industry average) | — | — |
| Segmentation Filter Count(filters) | 45+ filters | Basic segmentation | — |
| Client Revenue Tracked (Lifetime)(million USD) | $50M+ | Not publicly disclosed | — |
| Channels Supported(count) | 3 (Email, SMS, WhatsApp) | — | — |
| Platform Rating(out of 5) | 4.7/5 | — | — |
| Starting Monthly Price(USD) | $25 | — | — |
| Typical Onboarding Time(days) | 7-14 | — | — |
| eCommerce Revenue Attribution(USD per email) | $72 per email sent | — | — |
| eCommerce Platform ROI(%) | Industry average 4,200% | — | — |
| Starting Monthly Price(USD) | $20+ (usage-based) | — | — |
| Email Deliverability Rate(%) | 99.2% | — | — |
| API Rate Limit(requests per second) | 10,000 | — | — |
| Entry-Level Monthly Price(USD) | $25 | — | — |
| Price at 50,000 Contacts(USD) | $720 | — | — |
| SMS Cost Per Message(USD) | $0.01-$0.015 | — | — |
| Ease of Use Score(/10) | 6.5 | — | — |
| Starting Price(USD/month) | Free tier (500 contacts), then $20/month | — | — |
| Email Integrations Count(integrations) | 400+ | — | — |
| Behavioral Automation Triggers(triggers) | 200+ | — | — |
| API Rate Limits(requests/second) | 60 | — | — |
| SMS Deliverability Rate(percent) | 98% | — | — |
| Starting Monthly Cost(USD) | $20-45 | — | — |
| Free Email Monthly Limit(emails) | None | — | — |
| E-commerce Templates Available(count) | 200+ Shopify-optimized | — | — |
| API Rate Limit(calls per minute) | 500 req/sec | — | — |
| Open Rate Improvement (avg)(percent increase) | 10-15% with predictive send time | — | — |
| Deliverability Rating(percent) | 99.1% | — | — |
All figures sourced from publicly available data. Last updated Jun 2026.
Key Differences
Klaviyo
Email + SMS + Marketing Automation
Postscript
SMS-First (Dedicated SMS Platform)
Klaviyo
45+ filters (purchase history, SMS activity, customer data)🏆
Postscript
Basic segmentation options
Klaviyo
AI copy assistant, conversational AI, smart scheduling🏆
Postscript
Basic campaign automation
Klaviyo
Limited 2-way capability
Postscript
Full 2-way customer messaging built-in🏆
Klaviyo
$50M+ SMS revenue tracked🏆
Postscript
Not publicly disclosed
Klaviyo
Multi-channel marketing automation
Postscript
SMS-focused eCommerce engagement
Klaviyo
Yes, with email and SMS
Postscript
Yes, A/B testing included
Full Comparison
| Attribute |  Klaviyo | Postscript |
|---|---|---|
| Starting Price (Entry Tier)(USD/month) | $20/month | — |
| Cost at 5,000 Contacts/Profiles(USD/month) | $100/month | — |
| Cost at 50,000 Contacts/Profiles(USD/month) | $720/month | — |
| Starting Price (Email Only)(USD/month) | $20/month (500 contacts) | — |
| Price at 100K Contacts(USD/month) | Varies by plan features | — |
Show 10 more attributesPricing Structure Active profiles (contacts with behavior) — Free Contact Storage(contacts) Limited (plan-dependent) — Starting Monthly Price(USD) $25 — Starting Monthly Price(USD) $20+ (usage-based) — Entry-Level Monthly Price(USD) $25 — Price at 50,000 Contacts(USD) $720 — SMS Cost Per Message(USD) $0.01-$0.015 — Starting Price(USD/month) Free tier (500 contacts), then $20/month — Starting Monthly Cost(USD) $20-45 — Free Email Monthly Limit(emails) None — | ||
| Free Plan Email Features | All email features included | — |
| Email Template Design Options(variety level) | eCommerce-optimized templates | — |
| Segmentation Capabilities(sophistication level) | Advanced behavior-led segmentation | — |
| Customer Data Integration(depth level) | Unified customer data foundation | — |
| Campaign Scheduling | Smart scheduling with AI optimization | Standard scheduling available |
Show 16 more attributesSegmentation Capability Advanced behavioral data segmentation — Channels Supported(count) 3 (Email, SMS, WhatsApp) — AI Features Available Personalized send time optimization — Customer Data Platform Built-in CDP as core foundation — AI-Powered Features(null) Predictive send-time optimization (Q4 2025), AI-driven personalization Standard automation only Automation Capabilities Unlimited triggered sequences with advanced conditional logic — Multi-Channel Support(channels) Email and SMS — Channels Supported(count) Email, SMS, Web Push, Forms — Segmentation Capabilities Behavioral, predictive, e-commerce segments, custom attributes — Personalization Capabilities AI-powered with customer data platform — Email Integrations Count(integrations) 400+ — Landing Page Builder No, third-party required — SMS Capability(native integration) Native SMS included — E-commerce Templates Available(count) 200+ Shopify-optimized — API Rate Limit(calls per minute) 500 req/sec — Automation Workflow Complexity(trigger types) Unlimited with predictive optimization — | ||
| Monthly Email Send Limit (Entry Plan)(emails/month) | 5,000+ | — |
| Free Plan SMS Capability | Not included | — |
| Entry-Level Pricing Accessibility | Higher minimum investment required | — |
| Free Plan Segmentation Limits(segments) | Basic email features only | — |
| Pre-built Integrations(integrations) | Extensive custom via API | — |
| Customer Data Behavioral Depth | Real-time behavioral graphs with continuous updates | — |
| Omnichannel Support(channels) | Email, SMS, push, in-app, direct mail | — |
| Target Market Focus | Mid-to-large ecommerce, Shopify Plus, data-driven brands | — |
| Target Business Size | SMB to Enterprise (all Shopify store sizes) | — |
| Average eCommerce Email Revenue Per Send(USD) | $72 | — |
| eCommerce Email Automation ROI(%) | 4,200% ROI (industry average) | — |
| Built-in CRM for Sales Teams | B2C customer data platform | — |
| CRM Lead Scoring Capability(null) | Behavioral purchase-event segmentation | — |
| Native SMS Channel | Included in all plans | — |
| Shopify Integration Depth | Native with product catalog sync, dynamic blocks, and product recommendations | — |
| Multi-Channel Automation Support | Email, SMS, push (native) | — |
| Segmentation Filter Count(filters) | 45+ filters | Basic segmentation |
| Two-Way Messaging | Limited 2-way capability | Full 2-way messaging native |
| Email Marketing Integration | Native email + SMS + pop-ups | SMS focus with limited email |
| Client Revenue Tracked (Lifetime)(million USD) | $50M+ | Not publicly disclosed |
| A/B Testing | Yes, multi-channel A/B testing | Yes, SMS-specific A/B testing |
| Email Support Cost(USD/month) | Included (higher plans only) | — |
| Customer Support Availability(hours/day) | 24/5 email, phone 9-5 EST | — |
| Setup Complexity(hours) | Steeper learning curve (data-focused) | Low (SMS-focused simplicity) |
| Platform Rating(out of 5) | 4.7/5 | — |
| Deliverability Grade | Enterprise-grade, proven at scale with dedicated infrastructure | — |
| Typical Onboarding Time(days) | 7-14 | — |
| eCommerce Revenue Attribution(USD per email) | $72 per email sent | — |
| eCommerce Platform ROI(%) | Industry average 4,200% | — |
| Shopify Native Integration Depth(null) | Deep native with purchase-event segmentation | — |
| Primary Geographic Strength(null) | North America eCommerce focus | — |
| Email Deliverability Rate(%) | 99.2% | — |
| SMS Deliverability Rate(percent) | 98% | — |
| Open Rate Improvement (avg)(percent increase) | 10-15% with predictive send time | — |
| Deliverability Rating(percent) | 99.1% | — |
| API Rate Limit(requests per second) | 10,000 | — |
| Mobile App Users(millions) | 150,000+ e-commerce merchants | — |
| Learning Curve(difficulty level) | 1-2 weeks | — |
| Automation Complexity Level | Advanced multi-channel | — |
| Behavioral Automation Triggers(triggers) | 200+ | — |
| Ease of Use Score(/10) | 6.5 | — |
| E-commerce Integration Quality | Native integration with major platforms | — |
| Maximum Subscriber Limit(contacts) | Unlimited | — |
| SMS Marketing Included | Yes, native SMS | — |
| API Rate Limits(requests/second) | 60 | — |
| Free Trial Length(days) | Free tier (unlimited) | — |
KlaviyoShow 10 more attributes
Show 16 more attributes
Visual Comparison
Side-by-side comparison of numeric attributes
Pros & Cons
Klaviyo
Pros
- 45+ advanced segmentation filters for highly targeted campaigns
- AI copy assistant for automated message generation
- Unified email + SMS + pop-up management in single platform
- $50M+ in tracked SMS revenue generated for clients
- Real-time analytics and personalized send-time optimization
Cons
- Higher pricing tier due to comprehensive feature set
- Steeper learning curve for SMS-only users
Postscript
Pros
- Full 2-way customer messaging for interactive SMS conversations
- SMS-first design with faster implementation and simpler UI
- Built-in A/B testing specifically optimized for SMS
- Abandoned cart reminders and SMS opt-in forms
- Lower pricing focused on SMS-only needs
Cons
- Limited multi-channel integration compared to Klaviyo
- Fewer advanced segmentation options available
Frequently Asked Questions
Klaviyo is superior for multi-channel campaigns as it integrates email, SMS, and pop-ups natively with unified segmentation. Postscript is SMS-only focused, though it can integrate with email platforms. If you need unified management across channels, Klaviyo is the better choice.
Resources & Learn More
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