Skip to content
effecthub

Omnisend vs Retain AI

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Omnisend publishes a starting price ($11.20); Retain AI does not. Both have a free tier. Only Omnisend ships a public API.

OmnisendEmail and SMS marketing for online stores, with AI copy, segmentation and forms built into the existing campaign builder.Retain AIFree Shopify app that auto-generates and sends AI winback emails to past customers based on purchase history.

Side by side

FactOmnisendRetain AI
CategoryEmail Marketing & NewslettersEmail Marketing & Newsletters
Pricing modelFreemiumFree
Starts at$11.20 month—
Public APIYesNo
PlatformsWeb, APIWeb
CompanyUAB OmnisendChatdesk Inc (DBA Remarkable AI)
Launched2014—
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

Omnisend

This is a mature e-commerce marketing platform that added AI to jobs it already did, which is why the AI features are useful rather than decorative — segments, subject lines and forms are the parts of the workflow that are genuinely tedious. The MCP server is an unusual addition: you can query campaign performance from Claude or ChatGPT and act on it. The pricing headline is misleading in the normal email-marketing way, since the bill tracks your contact count.

Pros

  • AI copy, subject lines, product recommendations and segmentation inside the existing builder
  • MCP server exposes account insights and actions to ChatGPT and Claude
  • Genuine free plan including the AI features, not a trial
  • Native integrations with Shopify, WooCommerce, BigCommerce, Wix and Ecwid plus an open API
  • Named EU company operating since 2014 with published legal entities and a GDPR privacy policy

Cons

  • Price rises with contact count — $11.20 covers only 500 contacts
  • SMS is metered separately on top of the plan
  • Free plan is capped at 500 emails a month, which most active stores exhaust quickly

Retain AI

Retain AI automates a genuinely tedious task, writing and sending win-back emails to lapsed customers, and it costs nothing to try since it's a free Shopify app. The tradeoff is that it only reaches customers 90 days after their last order, so it won't help a store that needs faster-turnaround retention campaigns.

Pros

  • Free to install with no paid tier or usage cap disclosed
  • Generates a custom image per email rather than reusing a static template
  • Segments customers automatically by purchase history

Cons

  • Fixed 90-day trigger with no visible way to customize timing
  • Shopify-only, doesn't work on other ecommerce platforms

Which one fits

Choose Omnisend if you need

  • Shopify and WooCommerce stores running email plus SMS
  • Teams who want AI segmentation without leaving the campaign tool
  • Anyone wanting to query campaign data from an AI assistant via MCP

Choose Retain AI if you need

  • Shopify merchants wanting automated win-back email without writing copy
  • Stores that don't already run a dedicated email marketing platform
  • Merchants who want retention emails with auto-generated product imagery

More comparisons

Browse all Email Marketing & Newsletters →