Klaviyo vs Postscript: Complete Comparison (2026)
An in-depth comparison of Klaviyo and Postscript to help you choose the right tool for your business.
Last updated: November 2026
Klaviyo
6.9/10
Klaviyo is an email, SMS and customer data platform for ecommerce brands, priced by active profiles and built around store data and automated flows.
Postscript
6.3/10
Postscript is an SMS, MMS and RCS marketing platform built for Shopify stores, with automations, segmentation, subscriber growth tools and optional AI features.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.9/10 | 6.3/10 |
| Scalability | 8/10 | 7/10 |
| Ease of Use | 6/10 | 8/10 |
| Customization | 8/10 | 6/10 |
| Security | 7/10 | 6/10 |
| Support | 5/10 | 6/10 |
| Cost | 4/10 | 5/10 |
| Integration | 9/10 | 6/10 |
| Analytics | 9/10 | 7/10 |
| Pricing | ||
| Free plan | Yes | No |
| Cheapest paid plan | $20/mo Email | $49/mo Starter |
| Estimated cost for 10 users | Free Free | $49/mo Starter |
| Features | ||
| E-commerce Features | ||
| Segmentation | ||
| SMS Marketing | ||
| A/B Testing | Not listed | |
| Email Marketing | Not listed | |
| Landing Pages | Not listed | |
Klaviyo vs Postscript cost by team size
Klaviyo costs less at every team size we checked.
| Team size | Klaviyo | Postscript |
|---|---|---|
| 1 user | FreeFree | $49/moStarter |
| 5 users | FreeFree | $49/moStarter |
| 10 users | FreeFree | $49/moStarter |
| 25 users | FreeFree | $49/moStarter |
| 50 users | FreeFree | $49/moStarter |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Klaviyo
- Has a free plan (Postscript does not)
- Lower estimated cost for 10 users: Free vs $49/mo
- Higher Integration score (9/10 vs 6/10)
- Higher Customization score (8/10 vs 6/10)
- Better fit for agencies (7/10 vs 4/10)
Why choose Postscript
- Higher Ease of Use score (8/10 vs 6/10)
- Higher Support score (6/10 vs 5/10)
Pros & Cons
Klaviyo
Pros
- Deep native integration with Shopify and other stores lets marketers segment on real purchase and browsing data.
- A free plan with 250 profiles and a 20 USD entry plan make it cheap to start.
- Since July 2026, SMS uses dollar-based plans with over 70 tiers, so gaps between plans are smaller and larger plans get lower per-message rates.
- A broad product suite covering reviews, helpdesk, personalization and AI agents can replace several separate tools.
Cons
- Billing by active profiles and uneven tier steps cause cost jumps, for example from 150 USD at 10,000 profiles to 350 USD at 15,000 on the Email plan.
- Many features, such as Reviews, Helpdesk, Personalization and Composer, are separately priced add-ons that raise the total bill.
- Free accounts get email support only for the first 60 days, and reviewers on G2 and Trustpilot report slow or hard-to-reach support.
- New users report a learning curve with segments, event triggers and flow logic.
Postscript
Pros
- Built around Shopify, so store data drives segments, flows and attribution with little setup.
- Starter has no platform fee, and message rates fall on the higher tiers for high-volume senders.
- Every plan includes unlimited segments, a visual flow builder with templates and response management.
- Holds about a 4.7 rating across more than 1,100 Shopify App Store reviews.
- A $100 trial credit lets stores test real sends before choosing a plan.
Cons
- Covers texting only. Email is on a waitlist, so most stores need a separate email platform.
- Starter charges the $49 minimum even in months with no sends.
- Live chat support requires Growth or higher, and recent reviews criticize the move to AI-first support.
- Some merchants report annual contracts that renewed for another year without them noticing.
- Built for US and Canada; comparison articles report international SMS at about $0.25 per message.
Not sold on either?
Frequently Asked Questions
Klaviyo scores higher on our Marketing criteria: 6.9/10 against 6.3/10 for Postscript. The largest gap is in Integration: 9/10 for Klaviyo and 6/10 for Postscript.
Klaviyo costs less for 10 users: free on its Free plan, against about $49/mo on its Starter plan for Postscript, billed monthly.
Klaviyo has a free plan; Postscript does not list one.
Klaviyo is the better fit for agencies: we rate it 7/10 for them, against 4/10 for Postscript.
