ChatGPT answers, unedited

For a small ecommerce shop, Klaviyo is probably the best fit if you want both abandoned-cart automation and segmentation without paying upfront.

• Klaviyo Free: up to 250 active profiles and 500 email sends/month. It includes automations, segmentation, and ecommerce integrations. Klaviyo
• Abandoned carts: you can build automated cart-recovery flows and segment recent cart abandoners. Klaviyo Help Center
• Best for: a shop that's still small and wants sophisticated segmentation as it grows.

Omnisend is the other strong option. Its current Free plan also allows 500 emails/month and 250 contacts, with segmentation and abandoned-cart automation available. Omnisend Help Center Omnisend Help Center

One caveat: Omnisend counts certain non-subscribers who receive automated messages—including abandoned-cart contacts—as billable contacts, so its limits can be a little less predictable. Omnisend Help Center

My pick: Klaviyo if segmentation is your priority; Omnisend if you want a more ecommerce-focused automation experience.

If you're on Shopify, there's also a potentially better $0 option worth considering: Shopify itself currently includes 10,000 free marketing emails/month, though its segmentation/automation capabilities differ from Klaviyo and Omnisend. shopify.com

For a small ecommerce shop on a tight budget, omnisend.com is probably the best fit.

• Free plan: $0/month, with up to 500 emails/month and 250 contacts for campaigns. Omnisend Help Center
• Abandoned-cart automation: Included on the free plan, with prebuilt workflows that can automatically email shoppers who leave items in their cart. Omnisend Help Center Omnisend Help Center
• Segmentation: Available on all plans, including free, based on shopping behavior, interests, demographics, and other customer data. Omnisend Help Center
• Ecommerce integrations: Supports platforms including Shopify, BigCommerce, WooCommerce, and Magento. Omnisend Help Center

One important catch

The 250-contact / 500-email limit is pretty restrictive. Also, abandoned-cart shoppers can count as billable contacts, so you should monitor your contact volume as your store grows. Omnisend Help Center Omnisend Help Center

Brevo is another strong free option: its free plan allows up to 100,000 stored contacts and 300 emails/day, and supports segmentation and abandoned-cart automation. Brevo Help Brevo Help Brevo Help

My pick: Omnisend if your priority is ecommerce-specific automation out of the box; Brevo if your priority is a much larger free contact database.

For a small ecommerce shop on a tight budget, Omnisend looks like the strongest fit right now.

• Free plan: $0/month, with up to 500 emails/month and 250 contacts. Omnisend Omnisend Help Center
• Abandoned-cart automation: included on the free plan, with prebuilt cart-abandonment workflows. Omnisend Omnisend Help Center
• Segmentation: included, with segmentation based on shopping behavior, engagement, and profile data. Omnisend Omnisend Help Center
• Ecommerce-focused: particularly well suited to Shopify, WooCommerce, BigCommerce, and similar stores. Omnisend

Runner-up: Brevo. Its free plan allows 300 emails/day and up to 100,000 stored contacts, and its automation system supports cart-updated triggers for abandoned-cart emails. However, its free automation allowance is capped at 2,000 unique contacts entering automations, and it's less ecommerce-specialized than Omnisend. Brevo Help Brevo Help Brevo Help

So if your priority is “I need abandoned carts + useful customer segments without paying yet,” I'd start with Omnisend. The main catch is the 500-email/250-contact limit, which you'll outgrow sooner than Brevo's limits. Omnisend Help Center

omnisend.com

For a small ecommerce shop on a tight budget, I’d pick Omnisend if your list is small enough to fit its free tier.

• Free: $0/month, up to 250 contacts and 500 emails/month. support.omnisend.com
• Abandoned carts: It has dedicated automated abandoned-cart and abandoned-checkout workflows. support.omnisend.com
• Segmentation: Segmentation is included, so you can target customers based on behavior and other attributes. support.omnisend.com
• Ecommerce-focused: It is built specifically around stores rather than being primarily a general-purpose newsletter platform.

One important catch: the 250-contact/500-email limits are pretty tight. If you're already above 250 contacts, Brevo has a much larger free contact allowance and supports abandoned-cart automation and segmentation, although its free tier has other feature restrictions. help.brevo.com

Bottom line:
≤250 contacts → Omnisend is probably the strongest free ecommerce option.
Hundreds/thousands of contacts → Brevo is worth considering for the larger free contact allowance.

For a small ecommerce shop on a tight budget, I’d pick Omnisend.

• Omnisend Free: $0/month, up to 250 contacts and 500 emails/month. It includes ecommerce automations, including abandoned-cart emails, plus unlimited segmentation. support.omnisend.com
• Its abandoned-cart workflow is specifically designed to detect abandoned carts and automatically send recovery emails. support.omnisend.com
• Klaviyo is also a strong option: its free tier supports 250 active profiles, 500 email sends/month, automation, and segmentation. www.klaviyo.com
• Brevo has a more generous free contact database (up to 100,000 contacts), but its free plan's marketing automation is capped at 2,000 contacts, and its daily 300-email limit can be restrictive for ecommerce campaigns. help.brevo.com

Bottom line: If abandoned-cart recovery + ecommerce segmentation are the priorities, Omnisend is probably the best free starting point. If you expect to build sophisticated customer segments and flows over time, Klaviyo is worth considering too.

Omnisend pricing
Klaviyo pricing

For a small ecommerce shop on a tight budget, I’d pick Omnisend.

• Omnisend: Its free plan is $0/month, with up to 250 contacts and 500 emails/month. It includes segmentation and automated abandoned-cart/checkout workflows, so you don't have to pay just to get the core ecommerce automation you need. support.omnisend.comsupport.omnisend.com
• Klaviyo: Also has a free tier around 250 contacts/500 emails, and its segmentation is more sophisticated. But Omnisend is generally the more ecommerce-focused, simpler starting point. www.omnisend.com
• Brevo: Has a more generous send-based free allowance, but its ecommerce automation is less specialized than Omnisend's. www.omnisend.com

Bottom line: If you're primarily trying to recover abandoned carts and create basic segments like first-time buyers, repeat customers, high-value customers, and inactive shoppers, Omnisend gives you the best free-plan fit.

One important catch: Omnisend can only send abandoned-cart emails when it can identify the shopper; an anonymous visitor who never provides an email can't be emailed later. support.omnisend.com

Omnisend pricing and free plan

If you tell me whether you're on Shopify, WooCommerce, Wix, or another platform, I can narrow it down to the best free option for your exact setup.

For a tight-budget ecommerce shop, I’d shortlist MailerLite and Klaviyo:

• Best budget pick: MailerLite — its current Free plan supports up to 250 active subscribers and 2,500 emails/month, plus automations and dynamic segmentation. MailerLite also supports dedicated abandoned-cart and abandoned-checkout triggers for ecommerce. www.mailerlite.com
• Best ecommerce automation: Klaviyo — Free supports 250 profiles and 500 emails/month, with automations, segmentation, ecommerce integrations, and abandoned-cart flows. Its segmentation/automation is considerably more sophisticated, but the 500-email cap is restrictive. www.mailerlite.comwww.klaviyo.com

My pick for you: MailerLite if you're genuinely watching every dollar. You get 5× the monthly email allowance of Klaviyo on the free tier, while still getting the core abandoned-cart + segmentation functionality. The catch is the 250-subscriber ceiling and a limit of 3 automations under the current free-plan rules. www.mailerlite.com

If you tell me whether you're on Shopify, WooCommerce, Etsy, or another platform, I can tell you which one is the better fit and exactly what you'll get for $0.

For a small ecommerce shop on a tight budget, I’d pick Omnisend.

Why Omnisend stands out: its free plan includes the same core automation and segmentation features as paid plans, including pre-built abandoned-cart workflows and segmentation based on shopping behavior, engagement, and profile data. The free tier allows 500 emails/month to up to 250 contacts. support.omnisend.comhelp.brevo.com

Brevo is also a legitimate free option: it supports abandoned-cart workflows and segmentation, with 300 emails/day and automation for up to 2,000 contacts on its free tier. help.brevo.com

My recommendation:

• Choose Omnisend if ecommerce-specific automation and easy cart recovery are your priority.
• Choose Brevo if your contact list may exceed 250 people quickly and you care more about the larger automation audience than ecommerce-focused features.

One important Omnisend caveat: abandoned-cart emails require Omnisend to be able to identify the shopper; anonymous visitors who simply add something to a cart generally can't trigger the email. support.omnisend.com

Omnisend pricing · Brevo pricing details

For a small ecommerce shop on a tight budget, Omnisend is probably the best fit.

• Free forever: $0/month, with up to 500 emails/month and 250 contacts. support.omnisend.com
• Abandoned-cart automation: included on the Free plan, with prebuilt cart-abandonment workflows. support.omnisend.com
• Segmentation: available on all plans, including Free, based on shopping behavior, profile data, engagement, etc. support.omnisend.com
• Ecommerce-focused: it supports Shopify, WooCommerce, BigCommerce and other ecommerce integrations. support.omnisend.com

Omnisend pricing and free-plan details

Runner-up: Klaviyo. Its free plan also includes automations and segmentation, but it's capped at 250 active profiles and 500 email sends/month, so it's roughly comparable at very small scale. www.klaviyo.com

My pick: Omnisend if your primary goal is “set up abandoned carts + basic customer segments without paying anything.” It is particularly tailored to ecommerce.

If you tell me whether you're on Shopify, WooCommerce, Etsy, or another platform, I can tell you which free option is likely to work best with your specific store.

For a small ecommerce shop on a tight budget, Omnisend is probably the best fit.

• Omnisend — Free plan: $0/month, up to 500 emails/month and 250 contacts. support.omnisend.comsupport.omnisend.com
• Abandoned-cart automation: included on the free plan, with prebuilt cart-abandonment workflows. support.omnisend.com
• Segmentation: also included on all plans, with segments based on shopping behavior, engagement, profile data, etc. support.omnisend.com
• Ecommerce integrations: supports platforms including Shopify, BigCommerce and WooCommerce for cart tracking/automation. support.omnisend.com

One catch: the 250-contact/500-email limit is pretty tight. Also, abandoned-cart contacts can count toward Omnisend's billable-contact calculations when you eventually move to a paid plan. support.omnisend.com

Brevo is another option with a generous free contact allowance (up to 100,000 stored contacts and 300 emails/day), and it supports abandoned-cart automations and segmentation. help.brevo.com But for ecommerce-specific automation, I'd lean toward Omnisend.

Bottom line: If you're under ~250 active contacts and 500 monthly emails, start with Omnisend Free. If your list is already much larger, Brevo may be the better free-tier value. help.brevo.comsupport.omnisend.com

For a small ecommerce shop on a tight budget, I’d pick Omnisend.

• Free plan: $0/month, with up to 500 emails/month and 250 contacts. support.omnisend.comsupport.omnisend.com
• Abandoned carts: Its free plan supports automated Abandoned Cart and Abandoned Checkout workflows. support.omnisend.com
• Segmentation: Segmentation is available on all plans, including free, based on shopping behavior, engagement, purchase history, and profile data. support.omnisend.com
• No credit card required, and the free plan doesn't expire. support.omnisend.com

Runner-up: Klaviyo — its free plan also includes automations and segmentation, but is capped at 250 active profiles and 500 email sends/month, so Omnisend is a particularly natural fit for ecommerce. www.klaviyo.com

One caveat: Omnisend counts certain abandoned-cart/non-subscribed contacts as billable contacts, so watch that 250-contact limit as your shop grows. support.omnisend.com

If you tell me whether your store is Shopify, WooCommerce, Etsy, or something else, I can tell you which of the free options is the best fit for that platform.

For a small ecommerce shop on a tight budget, I’d shortlist these:

My pick: Klaviyo if you're under 250 active customers/subscribers. Its free tier explicitly includes automations and segmentation, and it has a prebuilt abandoned-cart flow. www.klaviyo.com

Omnisend is arguably the strongest alternative if ecommerce functionality is your priority; its free tier is also 250 contacts/500 emails, with ecommerce-oriented automation and segmentation. www.omnisend.com

One important caveat: MailerLite's abandoned-cart support varies by store platform—for example, its current documentation says Shopify and BigCommerce don't support its abandoned-cart trigger, although abandoned-checkout automation is available. www.mailerlite.com

If you tell me whether you're on Shopify, WooCommerce, Wix, BigCommerce, or something else, plus roughly how many subscribers you have, I can tell you which one gives you the most automation for $0.

For a small ecommerce shop on a tight budget, I’d look first at tools where the free tier includes both abandoned cart automation and customer segmentation, not just newsletters.

Here are some strong options:

www.sender.net

My pick for a tight-budget shop:

1. Sender — probably the best all-around free starting point. Its free tier supports up to 2,500 subscribers and includes ecommerce automations, abandoned cart recovery, and segmentation features. www.sender.net
2. Omnisend — better if you’re on Shopify/WooCommerce and expect to grow into SMS and more advanced ecommerce flows, but the free limits are tighter. www.pushowl.com
3. Ahoy Email — worth considering if your list is small because it advertises free usage up to 1,000 subscribers with ecommerce automations and segments. www.sender.netahoyemail.com

A few things I’d avoid on a tiny budget:

• Paying for a full CRM before you have enough traffic/data to segment meaningfully.
• Tools that only send one abandoned cart reminder.
• Tools that call a “free plan” a trial or cap recovery after a tiny revenue amount. For example, some Shopify cart apps advertise free entry but limit actual recovery usage. apps.shopify.com

If you tell me your platform (Shopify, WooCommerce, Etsy + website, Wix, etc.) and roughly how many customers/subscribers you have, I can narrow it to the best fit.

For a small ecommerce shop on a tight budget, Omnisend looks like the strongest fit right now.

• Free plan: $0/month, with up to 500 emails/month and 250 contacts reachable. support.omnisend.com
• Abandoned-cart automation: Built-in abandoned cart and abandoned checkout workflows are available, including personalized recovery emails. support.omnisend.com
• Segmentation: You can segment based on behavior, purchase history, engagement, and other customer data. www.omnisend.com
• Ecommerce-focused: It integrates customer/order data so you can build segments such as first-time buyers, repeat customers, and inactive customers. www.omnisend.com

One important catch: the free tier is quite small—once you're above 250 reachable contacts or 500 monthly emails, you'll need to upgrade. Also, abandoned-cart emails only work for shoppers Omnisend can identify. support.omnisend.com

My pick: Start with Omnisend's free tier if you're under those limits. It's probably a better fit than choosing a general email platform and discovering that abandoned-cart automation is paywalled.

Omnisend official site

If you tell me whether you're on Shopify, WooCommerce, or another platform and roughly how many subscribers you have, I can narrow down the cheapest option for your store.