ChatGPT answers, unedited

For a small ecommerce store on a tight budget, I’d start with Omnisend.

Why it stands out:

• Email + SMS in one platform, rather than stitching together separate tools.
• Built specifically for ecommerce, with workflows for welcome series, abandoned carts, post-purchase messages, and re-engagement. www.omnisend.com
• It has a free plan, and paid plans start around $16/month at the lower contact tiers. www.omnisend.com
• It integrates with major ecommerce platforms such as Shopify, WooCommerce, BigCommerce, and Wix. www.omnisend.com
• Compared with Klaviyo, it's generally the better value-for-money choice when you specifically need both email and SMS. www.omnisend.com

My quick ranking

Brevo is worth considering if your subscriber list is large but you don't send very frequently, because its pricing is based heavily on send volume rather than contact count. www.omnisend.com

Klaviyo is excellent, but I'd wait until your store is generating enough revenue to justify its more advanced capabilities. Its paid email + SMS setup starts around $35/month at 500 contacts, versus Omnisend's lower entry point. www.omnisend.comwww.omnisend.comwww.omnisend.com

Bottom line: Omnisend is my pick if your priorities are small store + low cost + both email and SMS + ecommerce automation. www.omnisend.com

If you tell me your ecommerce platform (Shopify, WooCommerce, etc.), roughly how many customers/subscribers you have, and how many emails/SMS messages you expect to send per month, I can tell you which plan is likely to be cheapest.

For a small ecommerce store on a tight budget, I’d look first at brevo.com and omnisend.com.

• Best for lowest starting cost: Brevo. Its free plan includes both email and SMS campaigns, with 300 email sends/day. Paid plans start at $9/month. Brevo Help
• Best for ecommerce-specific marketing: Omnisend. It has stronger store-focused automation features, but there's an important 2026 pricing change: for new subscribers, SMS requires the Pro plan, starting at $59/month, with SMS added separately from $0.007/message. Omnisend Help Center Omnisend

My pick

If "tight budget" is the priority, I'd choose Brevo.

If you're willing to spend more once your store grows and want sophisticated abandoned-cart, product, customer-segment, email + SMS automation, I'd choose Omnisend.

If you tell me roughly how many email subscribers you have and how many SMS messages you'd send per month, I can compare the actual monthly cost of Brevo vs. Omnisend vs. Klaviyo for your store.

For a small ecommerce store on a tight budget, I’d start with omnisend.com.

My ranking

• 🥇 Omnisend — best overall fit. It’s built specifically for ecommerce and combines email + SMS in the same campaigns/automations, including abandoned-cart and post-purchase flows. Its Standard plan starts around $16/month for 500 contacts, and there’s a free tier. Omnisend Omnisend
• 🥈 Brevo — cheapest if your list is large but you don't send constantly. It uses send-based pricing rather than primarily charging by contact count; plans start around $9/month, and SMS is available. The tradeoff is that its ecommerce automation is less specialized than Omnisend's. Omnisend Omnisend
• 🥉 Klaviyo — best if you expect sophisticated marketing later. It's excellent for segmentation and ecommerce analytics, but it's harder to justify on a tight budget. Email + SMS starts around $35/month at the low end, versus Omnisend's lower entry price. Omnisend
• Shopify Messaging — cheapest if you're on Shopify and mostly need basic campaigns. Shopify currently gives stores 10,000 free emails/month, but it's much less capable for sophisticated email+SMS automation. Shopify

Bottom line: If you want one tool for email + SMS + abandoned cart + customer follow-ups without spending much, I'd choose Omnisend. If your absolute priority is minimum monthly cost, especially with a big contact list and relatively few sends, look closely at Brevo.

If you tell me (1) Shopify/WooCommerce/etc., (2) roughly how many customers/subscribers you have, and (3) your monthly marketing budget, I can tell you which one will actually be cheapest for your store.

For a small ecommerce store on a tight budget, I’d start with Brevo.

Why Brevo: its free plan includes email and SMS campaigns, transactional email/SMS, and up to 100,000 stored contacts, with a limit of 300 email sends per day. Paid plans start at $9/month. help.brevo.com

Why consider Omnisend instead: it's more ecommerce-focused, with product recommendations, abandoned-cart/automation workflows, segmentation, and ecommerce reporting. Its free plan supports 500 emails/month to 250 contacts, but new subscribers to paid plans need the Pro plan for SMS, starting at $41.30/month currently, plus SMS charges. support.omnisend.com

My pick

• Under ~$20/month: Brevo
• Willing to spend ~$40–60/month and want ecommerce automation: Omnisend
• Growing rapidly and need sophisticated segmentation/analytics: consider Klaviyo later.

If you tell me roughly how many email/SMS subscribers you have and how many messages you send per month, I can estimate the cheapest option for your store.

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

My pick: Omnisend

If you're selling through Shopify, WooCommerce, or another ecommerce platform, Omnisend is probably the sweet spot. It's designed specifically around ecommerce and combines email and SMS in the same automations—welcome series, abandoned carts, post-purchase messages, win-backs, etc. Its paid plans start around $16/month, while it also has a free tier. www.omnisend.com

Choose Brevo instead if keeping the monthly bill as low as possible is your #1 priority. Its free plan allows up to 300 emails/day, and its Starter plan starts at $9/month with email and SMS available (SMS credits are purchased separately). www.brevo.com

I wouldn't start with Klaviyo unless you expect to need sophisticated segmentation and analytics soon. Its Email + SMS pricing starts around $35/month for 500 active profiles, making it harder to justify for a very small store. www.omnisend.com

Bottom line:

• 💰 Cheapest: Brevo
• 🛒 Best balance for ecommerce: Omnisend
• 📊 Best advanced option: Klaviyo

If you tell me your ecommerce platform (Shopify/WooCommerce/etc.), roughly how many email subscribers you have, and how many SMS messages you expect to send per month, I can tell you which one will actually be cheapest for your store.

For a small ecommerce store on a tight budget, I’d start with Omnisend.

Why:

• Built specifically for ecommerce — email, SMS, abandoned-cart, welcome, post-purchase, and other automations are designed around online stores. www.omnisend.com
• Email + SMS in one platform, rather than bolting SMS onto an email product. www.omnisend.com
• Lower-cost entry point: Omnisend's Standard plan starts around $16/month for 500 contacts, while Klaviyo's comparable email + SMS setup starts higher. www.omnisend.com
• It has a free plan, although SMS and some advanced features aren't included there. www.omnisend.com
• It's simpler to get running than something like Klaviyo, while still giving you the core ecommerce automations you actually need. www.omnisend.comwww.omnisend.com

My shortlist

One important exception: if you have a large customer list but send relatively few emails, I'd seriously consider Brevo. Its pricing is based more on sends than contacts, which can make it substantially cheaper for large lists. www.omnisend.com

If you tell me (1) Shopify/WooCommerce/etc., (2) roughly how many email subscribers you have, and (3) how many SMS messages you expect to send per month, I can tell you which one is likely to be cheapest for your store.

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

My pick: Omnisend

Omnisend

It’s specifically built for ecommerce and lets you run email and SMS campaigns and automations in the same platform, including abandoned-cart, welcome, post-purchase, and win-back flows. Its paid plans start around $16/month, with a free tier available. www.omnisend.com

Choose Brevo instead if your #1 priority is keeping the bill as low as possible, particularly if you have a relatively large customer list but don't send constantly. Brevo uses email-send volume rather than contact count for pricing, and its plans combine email, SMS, and CRM functionality. www.omnisend.com

Brevo

I wouldn't start with Klaviyo on a tight budget. It's excellent, but its pricing scales with active profiles; the Email + SMS plan starts around $35/month at 500 profiles and rises considerably as your list grows. www.omnisend.com

Simple rule:

• 💰 Cheapest: Brevo
• 🛒 Best for a small ecommerce store: Omnisend
• 📊 Best when you're bigger and need sophisticated analytics: Klaviyo

If you tell me your ecommerce platform (Shopify, WooCommerce, etc.), approximate customer list size, and monthly marketing budget, I can tell you which one is likely to cost you the least.

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

My pick: Brevo

If keeping monthly costs extremely low is your priority, I'd start with Brevo. Its free tier supports both email and SMS campaigns, so you can run the two channels from one platform without immediately committing to a substantial subscription. help.brevo.com

If you're willing to spend more in exchange for better ecommerce-specific automation, segmentation, and revenue tracking, I'd choose Klaviyo instead. Its free plan is surprisingly useful for a very small store, and you can graduate to paid email + SMS as your list grows. www.klaviyo.com

One important change: I wouldn't choose Omnisend solely because you want cheap SMS. As of May 4, 2026, new Omnisend customers need the Pro plan for SMS, whereas its free/Standard plans no longer include SMS. support.omnisend.comsupport.omnisend.com

If you tell me roughly how many email subscribers you have and how many SMS subscribers you have, I can calculate which of these three would be cheapest for your store.

For a small ecommerce store on a tight budget, I’d look at these three:

🥇 Best budget choice: Brevo

Brevo is probably the best fit if keeping the monthly bill as low as possible is your priority. Its free plan includes email + SMS campaigns, with up to 300 emails/day; the Starter plan begins at $9/month. help.brevo.com

Best for: a small list, occasional campaigns, and wanting both channels without paying for a large ecommerce-specific platform.

🥈 Best ecommerce-focused: Omnisend

Omnisend is more purpose-built for ecommerce—automations such as abandoned cart, customer segmentation, and product-focused campaigns are a major strength. Its free plan gives you 500 emails/month to 250 contacts. support.omnisend.comwww.omnisend.com

Important catch: under its current pricing, new subscribers need the Pro plan (starting at $59/month) to use SMS, with SMS charged separately starting around $0.007/message in the US/Canada. www.omnisend.com

🥉 Best if you expect to scale: Klaviyo

Klaviyo is excellent for sophisticated ecommerce segmentation and personalization, but I'd generally avoid it when your primary constraint is budget. You can move to it later if your store grows enough to justify the additional cost.

My recommendation: Start with Brevo if you want one inexpensive tool for both email and SMS. Choose Omnisend instead if ecommerce automations are more important than minimizing your monthly cost.

If you tell me roughly how many email subscribers you have and how many SMS messages you expect to send per month, I can calculate which would actually be cheapest for your store.

For a small ecommerce store on a tight budget, I’d start with Omnisend.

My shortlist

Why Omnisend: It was built specifically for ecommerce and lets you run email and SMS campaigns and automations together, including welcome, abandoned-cart, and post-purchase workflows. Its free tier also gives small stores a way to get started before paying. www.omnisend.com

Brevo is worth considering if your absolute priority is minimizing the bill. Its pricing is primarily based on email volume rather than the number of contacts, which can be advantageous if you have a large list but don't email frequently. It also supports SMS and CRM features. www.omnisend.com

I'd skip Klaviyo initially unless you already have enough sales volume to justify sophisticated segmentation and analytics. Its capabilities are excellent, but the paid email+SMS plans start higher than the budget-oriented alternatives. www.klaviyo.com

My pick: Omnisend if you're selling through Shopify/WooCommerce and want one inexpensive tool for both channels. Brevo if keeping monthly costs as low as possible matters more than ecommerce-specific features.

If you tell me roughly how many customers/emails you have and which ecommerce platform you use (Shopify, WooCommerce, Etsy, etc.), I can tell you which one is likely to be cheapest for your specific store.

For a small ecommerce store on a tight budget, I’d start with Omnisend.

Why:

• Built specifically for ecommerce rather than being a generic email platform.
• Handles email + SMS in the same campaigns and automations, including abandoned-cart and post-purchase flows. www.omnisend.com
• It has a free plan, and paid plans start around $16/month for 500 contacts according to current 2026 pricing comparisons. www.omnisend.comwww.omnisend.com
• You get ecommerce-focused features without the complexity/cost of Klaviyo.

My budget ranking

Brevo is particularly interesting if you're extremely cost-sensitive: its pricing is largely based on emails sent rather than contacts, with a Starter tier reported at $9/month for 5,000 emails. www.omnisend.com

I'd avoid starting with Klaviyo unless you already have a sizable store and need sophisticated segmentation/predictive analytics. Its Email + SMS plan starts around $35/month at 500 active profiles and climbs substantially as your audience grows. www.omnisend.com

Bottom line:
👉 Omnisend if ecommerce automation and SMS are both important.
👉 Brevo if your #1 priority is spending as little as possible.

If you tell me what ecommerce platform you use (Shopify, WooCommerce, Etsy, etc.) and roughly how many email subscribers you have, I can narrow it down to the cheapest option for your specific store.

If you want one tool for both email + SMS and you're watching every dollar, I’d shortlist these:

My pick: Brevo

Brevo is probably the best starting point if budget is the #1 concern. Its free plan includes email and SMS campaigns, with up to 300 emails/day, and its Starter plan begins at $9/month. help.brevo.com

The catch is that Brevo's free plan has relatively modest email-sending limits, so you'd eventually pay as your volume grows.

If ecommerce automation matters more: Omnisend

I'd choose Omnisend if you're on Shopify or another ecommerce platform and want things like abandoned-cart, browse-abandonment, product recommendations, segmentation, and automated email/SMS flows in one place.

Its free plan is limited to 250 contacts and 500 emails/month. More importantly, under Omnisend's current pricing, new customers need the Pro plan for SMS, starting at $59/month normally (currently displayed at $41.30/month with its introductory 3-month discount), plus SMS charges starting at $0.007/message for U.S./Canada at qualifying volume. support.omnisend.com

So for a really tight budget, Brevo wins initially; for a growing ecommerce store where automation is worth paying for, Omnisend is more compelling.

I wouldn't start with Klaviyo on a tight budget unless you already know you need its more sophisticated segmentation/analytics.

If you tell me your approximate number of customers/email subscribers and how many SMS messages you expect to send per month, I can calculate which of these would actually be cheapest for your store.

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

🥇 I'd start with Omnisend

It was built specifically around ecommerce and puts email and SMS into the same campaigns, automations, segmentation, and customer journeys. Its free tier is aimed at small stores, and paid plans start around $16/month; current comparisons put it below Klaviyo at many contact levels. www.omnisend.com

That's particularly useful for automations like:

• Welcome → email + SMS
• Abandoned cart
• Browse abandonment
• Post-purchase follow-up
• Product/customer win-back
• Promotional campaigns

🥈 Consider Brevo if "cheap" is the #1 priority

Brevo uses send-based pricing rather than contact-based pricing, which can be excellent if you have a relatively large customer list but don't email constantly. Its free plan supports unlimited contacts with a daily email limit, and it combines email, SMS, CRM and other channels. www.omnisend.com

The tradeoff is that its ecommerce automation isn't as specialized as Omnisend/Klaviyo.

🥉 I'd hold off on Klaviyo

Klaviyo is excellent, particularly for sophisticated Shopify/DTC segmentation and analytics, but you're more likely to feel the cost as your customer list grows. Current 2026 pricing starts around $35/month for email + SMS at the 500-profile tier, versus Omnisend's lower starting point. www.omnisend.com

Bottom line: If you're running a small Shopify/WooCommerce-style store and want one inexpensive system for both email and SMS, I'd choose Omnisend. If you tell me roughly how many customers/subscribers you have and how many SMS messages you expect to send per month, I can work out which of the three is actually cheapest for you.

For a small ecommerce store on a tight budget, I’d shortlist Brevo and Omnisend, with Omnisend as my first choice if ecommerce automation matters.

🥇 My pick: Omnisend

Omnisend

It was specifically built around ecommerce and lets you run email and SMS campaigns plus automated flows such as welcome series, abandoned cart, and post-purchase messages in the same system. Its current paid plans start around $16/month for 500 contacts, while the free plan provides a way to get started. www.omnisend.comwww.omnisend.com

That makes it particularly attractive if you're on Shopify or WooCommerce and want something more ecommerce-oriented than a generic email platform.

💰 If minimizing cost is priority #1: Brevo

Brevo

Brevo uses send-based pricing rather than primarily charging by contact count, which can be a major advantage if you have a growing customer list but don't send constantly. Its free tier and low-cost paid plans also include multichannel capabilities such as email and SMS. www.omnisend.com

I'd choose Brevo if: you have lots of contacts, relatively modest email volume, and want the cheapest all-in-one option.

🚫 I wouldn't start with Klaviyo

Klaviyo

Klaviyo is excellent, particularly for sophisticated segmentation and customer journeys, but its pricing scales with active profiles and its Email + SMS offering starts higher. It's easier to justify once your store has enough sales volume to benefit from its more advanced analytics and automation. www.omnisend.comwww.omnisend.com

Bottom line:

• Small ecommerce store + want easy email/SMS automation → Omnisend
• Absolute lowest cost + large list → Brevo
• Growing/advanced store with sophisticated marketing → Klaviyo

If you tell me your approximate number of customers/subscribers and monthly email/SMS volume, I can work out which one would actually be cheapest for you.