Comparison

Omnisend vs Postscript

Last updated 2026-04-03

How they compare

Omnisend bundles email and SMS together at an affordable price point. Postscript focuses entirely on SMS with deeper text marketing features. If you want one platform for both channels, Omnisend is simpler and cheaper. If SMS drives significant revenue and you want advanced text campaigns, Postscript justifies the separate subscription.

Want the full breakdown? Read our in-depth Omnisend vs Postscript guide with real pricing at different volumes and practical recommendations.

Score breakdown

Omnisend8/10
Postscript7.5/10
Starting price$16/mo

free trial

Free tier
Pro price$59/mo$100/mo
Overall
8/10Best
7.5/10
Ease of use
9/10Best
8/10
Value for money
9/10Best
8/10
Shopify
9/10
10/10Best
Amazon
2/10Best
0/10
Platforms
Shopify
Shopify
Free trialYesYes

Best for

Omnisend

Best combined email and SMS on a single budget

Shopify sellers under 50K contacts who want email, SMS, and push notifications in one affordable platform

+9-43% cheaper than Klaviyo across all contact tiers with comparable features
+Email, SMS, and web push notifications in one platform from the free plan
+27 pre-built automation workflows with one-click abandoned cart setup
-Deliverability rates of 64-75% in independent tests, below top competitors
-No predictive analytics (CLV, churn risk) that Klaviyo offers
-Scaling issues reported above 50K contacts with no dedicated IP option

Postscript

Best standalone SMS with advanced campaign features

Shopify stores that want SMS as a dedicated revenue channel, not just a bolt-on to email

+Built exclusively for Shopify with deep integration
+AI-powered Infinity Testing across thousands of message variants
+Two-way conversational commerce with Shopper AI
+Free Starter plan with pay-per-message pricing
-Shopify only, no other platforms supported
-US and Canada only for SMS delivery
-Per-message costs add up at high volume
-Revenue attribution can overcount

Our verdict

Omnisend -- 8/10

Omnisend is the best value email and SMS platform for Shopify stores that do not need enterprise-level analytics. You get 90% of what Klaviyo offers at roughly half the price, with a genuinely useful free plan. The deliverability concern is real but manageable with good list hygiene. If you are doing under $50K per month and your list is under 50K contacts, Omnisend is the smarter starting point. Move to Klaviyo only when you need predictive analytics or outgrow the platform.

Postscript -- 7.5/10

The specialist SMS platform for Shopify. If SMS is a serious revenue channel for your store, Postscript's AI testing and conversational commerce features give it an edge over the SMS add-ons in Klaviyo and Omnisend.

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Frequently asked questions

Is Omnisend cheaper than Klaviyo?
Yes. Omnisend is 9-43% cheaper than Klaviyo across all contact tiers. At 5,000 contacts, Omnisend Standard costs approximately $81/month compared to $100/month for Klaviyo. The gap is largest at smaller list sizes and narrows as your list grows past 10,000 contacts.
Does Omnisend have a free plan?
Yes. The free plan includes 250 contacts, 500 emails/month, 60 SMS credits, and access to all features including automation workflows and the AI segment builder. It is the most generous free email marketing plan available for Shopify stores.
Is Omnisend good for SMS marketing?
Yes. SMS and email live in the same platform with unified contact profiles. You can mix email and SMS steps in a single automation flow. SMS credits are included in paid plans rather than billed separately like some competitors.
Should I use Omnisend or Klaviyo for Shopify?
Omnisend is the better starting point for most stores under 50,000 contacts. It offers comparable features at a lower price. Switch to Klaviyo when you need predictive analytics (CLV, churn scoring) or your list grows beyond where Omnisend scales comfortably.
Is Omnisend deliverability a problem?
Independent tests have measured Omnisend deliverability at 64-75%, which is below top competitors. This does not mean your emails will not arrive, but it means more may land in spam or promotions tabs. Good list hygiene, regular cleaning, and proper authentication (SPF, DKIM) help mitigate this.
Postscript vs Klaviyo for SMS - which is better?
Postscript for SMS depth (Infinity Testing, Shopper AI, better SMS templates). Klaviyo for email + SMS simplicity in one platform. If SMS is a serious channel, Postscript. If you want everything in one tool, Klaviyo.

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