Pop-ups

SendWILL vs Omnisend

A capture widget, or the whole email platform?

Verdict: SendWILL if you already have an ESP; Omnisend if you are choosing one.

Checked 26 October 2026

The two apps compared

SendWILL Popup Email Marketing

by EcomSend
Best free

Newsletter pop up window, SMS & email popup for more sign ups

4.9 (7.7k) Free plan availableShopify
Best for: Stores that want a strong free capture pop-up feeding an existing ESP.
What it does well
  • 7,400+ reviews at 4.9 — one of the most validated pop-up apps on the platform
  • Generous free tier that most small stores never outgrow
  • Straightforward setup with sensible defaults
Trade-offs
  • Not a full email platform — you still need an ESP for flows and campaigns
  • Advanced branching triggers are shallower than dedicated CRO tools
Full review Shopify listing

Omnisend Email Marketing & SMS

by Omnisend
Best platform

Drive sales with email marketing, newsletters, SMS, and popups

4.7 (3.2k) Free to installShopify
Best for: Merchants who want capture and the email engine behind it from one vendor.
What it does well
  • Pop-up feeds directly into flows and campaigns with no integration to maintain
  • SMS and email consent captured in the same widget
  • Mature platform with 2,900+ reviews
Trade-offs
  • Contact-based pricing grows with your list — model 12 months out
  • Overkill if you already pay for Klaviyo or Shopify Email
Full review Shopify listing

These two are not really competitors — they are two different answers to the question of who owns your email stack. SendWILL is a pop-up that hands addresses to whatever ESP you already pay for. Omnisend is an email and SMS platform where the pop-up is the front door. Running both is duplicated spend, and running Omnisend's pop-up alongside Klaviyo's flows is the specific mistake merchants make most often here.

Round by round

Scored on what decides it

SendWILL Popup Email Marketing takes 3 rounds, Omnisend Email Marketing & SMS takes 2, with 0 tied.

AxisSendWILL Popup Email MarketingOmnisend Email Marketing & SMSWhy
If you already use Klaviyo Wins — SendWILL captures and hands off. Adding Omnisend on top means paying two platforms to do overlapping work.
If you have no ESP yet — Wins Omnisend gives you capture, flows, campaigns and SMS in one contract with nothing to integrate.
Cost predictability Wins — A pop-up app costs roughly the same next year. Platform pricing scales with contacts, which is exactly the thing you are trying to grow.
Review signal Wins — 7,400+ reviews at 4.9 versus 2,900+ at 4.8. Both are well established; SendWILL is the stronger signal for the narrower job.
SMS consent — Wins Capturing phone numbers with proper consent handling is a platform job. If SMS is part of the plan, that argues for Omnisend.
Decide

Which one is for you

Choose SendWILL Popup Email Marketing if…

  • You already pay for Klaviyo, Omnisend or Shopify Email
  • You want capture only, cheaply
  • You want predictable costs as the list grows
4.9 · 7,689 reviews Shopify listing

Choose Omnisend Email Marketing & SMS if…

  • You are choosing an email platform now
  • You want SMS and email under one roof
  • You would rather have one vendor than an integration to maintain
4.7 · 3,197 reviews Shopify listing

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