Klaviyo vs Postscript: Which Do Real Users Prefer?
A head-to-head built from 241 real user posts online over the last 12 months — classified by sentiment, with sponsored posts filtered out.
Klaviyo
Email & SMS
+26NPS
Good
65 positive · 99 neutral · 25 negative — 189 mentions analyzed
Top themes
- Education, Onboarding & Competitive Comparison (65)positive
- Integrations & Platform Ecosystem (49)positive
- Automation & Flow Design (48)positive
Praise
- Flows that run on autopilot and still print revenue
- Migrating full contact lists and flows in under 48 hours via API
- Deep integrations with Shopify, Meta, GA4 and now AI tools like Claude
Complaints
- ROAS numbers routinely conflict with Meta and Google
- Costs climb fast as subscriber lists grow
- Attribution can overcredit sales from repeat buyers who'd have bought anyway
Postscript
Email & SMS
+33NPS
Great
21 positive · 28 neutral · 3 negative — 52 mentions analyzed
Top themes
- Competitive Positioning & Comparison (13)positive
- SMS Channel & Strategy (13)positive
- Platform, Tech Stack & Integrations (13)positive
Praise
- Won a legal fight exempting customers from Texas's strict new SMS law
- Onsite Opt-in Engage keeps brand numbers eligible for Known Sender inbox placement
- Merchants report SMS outpacing email revenue in real campaigns
Complaints
- Default 7-day attribution window inflates results vs industry-standard 1-day windows
- Some SMS programs show thin margins once messages-sent volume is factored in
- Ongoing patent litigation with Attentive creates noise around the brand
The verdict, from the data
Across 241 substantive mentions on X, Reddit and LinkedIn over the last 12 months, Postscript earns a sentiment score of 88 versus 72 for Klaviyo. Postscript holds a clear edge in online sentiment among the people discussing both tools. The conversation around Postscript centers on competitive positioning & comparison (13 mentions, leaning positive), while Klaviyo discussion is dominated by education, onboarding & competitive comparison (65 mentions, leaning positive). Users most often credit Postscript for "won a legal fight exempting customers from Texas's strict new SMS law", while the most common complaint about Klaviyo is "rOAS numbers routinely conflict with Meta and Google".
Frequently asked questions
Which is better, Klaviyo or Postscript, according to real users?
Postscript rates higher with real users: a Public NPS of +33 versus +26 for Klaviyo, based on what real people say online.
What do users like most about Klaviyo?
Flows that run on autopilot and still print revenue Migrating full contact lists and flows in under 48 hours via API Deep integrations with Shopify, Meta, GA4 and now AI tools like Claude
What are the most common complaints about Postscript?
Default 7-day attribution window inflates results vs industry-standard 1-day windows Some SMS programs show thin margins once messages-sent volume is factored in Ongoing patent litigation with Attentive creates noise around the brand