ChatGPT answers, unedited

If your main requirement is newsletters + targeted SMS + strong customer segmentation in one system, I’d shortlist these:

My practical take

Klaviyo is the strongest fit if segmentation and coordinated email/SMS campaigns are the core requirement. Its segments can use purchase history, browsing behavior, engagement, location, preferences, and other customer data, and those segments update dynamically. The same customer segments can be used across email and SMS. Klaviyo Klaviyo

For example, you could create segments such as:

• Customers who purchased in the last 30 days
• VIP/high-spending customers
• Customers who bought Product A but not Product B
• Customers who haven't purchased in 6 months
• Customers who engage with SMS but rarely email
• Customers in a particular geographic area
• Customers who viewed a product but didn't purchase

Klaviyo also supports automated email/SMS flows triggered by customer behavior. Klaviyo Help Center Klaviyo Help Center

Brevo is worth considering if you want a potentially more straightforward, broad marketing platform. It supports dynamic segments based on attributes and behavior and can use those segments for both email campaigns and SMS. Brevo Help Brevo Help

HubSpot makes more sense if your newsletter/SMS program is part of a larger sales CRM—for example, you need sales pipelines, lead management, customer records, forms, workflows, and marketing in one system. Its email tool can send to specific contact segments or trigger messages through workflows. HubSpot Knowledge Base

What I'd choose

• Ecommerce / retail: Klaviyo
• Small business wanting email + SMS without a huge CRM: Brevo
• B2B, sales-driven business, or complex CRM needs: HubSpot
• Most important requirement = sophisticated customer segmentation: Klaviyo

If you tell me roughly how many contacts you have, whether they're consumers or businesses, and whether you use Shopify/another CRM, I can narrow this down and compare actual 2026 pricing, SMS costs, contact limits, and features for your situation.

If your main requirement is one platform for newsletters + targeted SMS + strong customer segmentation, I’d shortlist these:

My practical take

Klaviyo is the one I'd investigate first if your customer data includes things like purchases, products viewed, customer value, location, engagement, or lifecycle stage. It supports shared segmentation across email and SMS, including behavioral and predictive data, and segments can update dynamically. Klaviyo Klaviyo

For example, you can create segments such as:

• Customers who bought Product A but not Product B
• Customers who haven't purchased in 90 days
• High-value/VIP customers
• Customers in a particular geographic area
• People who engage primarily through SMS
• Recent purchasers who shouldn't receive a promotional message
• Customers showing high purchase intent

Klaviyo specifically supports behavioral, purchase-history, engagement, location, CLV and churn-related segmentation. Klaviyo Help Center Klaviyo Help Center

Brevo is worth considering if keeping costs and complexity down is important. It combines email and SMS campaigns and supports segments based on attributes such as language, location and behavior. Brevo Help Brevo Help

HubSpot makes more sense when the newsletter/SMS program is part of a broader CRM operation—e.g. you want marketing contacts, sales activity, lifecycle stages and automated workflows in the same system. Its current marketing tools support dynamic segmentation based on behavior, lifecycle stage and engagement. HubSpot Blog

One important consideration

For SMS, don't simply treat your email list as an SMS list. SMS requires its own consent/opt-in, and platforms such as Klaviyo maintain separate email and SMS subscriber populations for this reason. academy.klaviyo.com

If you tell me your approximate customer-list size, whether you're e-commerce/B2B/service-based, and whether you already use a CRM (Shopify, Salesforce, HubSpot, etc.), I can narrow this to 2–3 options and compare their current pricing and capabilities.

The best platform depends on how sophisticated your segmentation needs are, whether you sell online vs. offline, and whether SMS should be part of the same customer journey as email. For most businesses, you’ll want a platform that keeps one customer profile so email and SMS targeting stay synchronized. Maestra Sequenzy

Top newsletter + targeted SMS platforms

My shortlist by scenario

• Online store (Shopify, WooCommerce, subscriptions):

→ klaviyo.com or omnisend.com
Good for segments like:

• bought product X but not Y
• customers inactive for 90 days
• VIP/high lifetime value customers
• abandoned cart
• location-based offers

SoftwareInspect TechRadar- Local business, services, events, memberships:
→ brevo.com, mailchimp.com, or hubspot.com
Useful segments:

• customers by location
• last appointment/purchase date
• customer type
• interest category
• Large database with complex sales/customer journeys:

→ hubspot.com or klaviyo.com

Features I would prioritize

1. Dynamic segments (segments update automatically as customers change)
2. Behavior triggers (purchase, visit, click, inactivity)
3. Unified email + SMS profiles
4. Two-way SMS replies
5. Consent and unsubscribe management (important for SMS compliance)
6. CRM/ecommerce integrations
7. Revenue attribution so you know which messages actually drive sales

If you tell me:

• your business type (ecommerce, nonprofit, SaaS, local services, etc.),
• number of contacts,
• whether you already use a CRM/ecommerce platform,
• and approximate monthly SMS volume,

I can narrow this to 2–3 best fits.

If your main requirement is newsletters + targeted SMS to the same segmented customer database, I’d shortlist these:

🥇 My recommendation: Klaviyo

For your specific use case, Klaviyo is probably the strongest choice. It is designed around a unified customer profile and lets you create essentially the same audience segments for email and SMS based on things like purchases, behavior, location, interests and engagement. Klaviyo Help Center Klaviyo

For example, you could have dynamic segments such as:

• VIP customers — spent $500+ in the last year
• Recent purchasers — bought in the last 30 days
• Lapsed customers — purchased previously but haven't bought in 6 months
• Product-interest segments — viewed/bought Product A
• Highly engaged — clicked an email recently
• SMS-only customers
• Customers who prefer email
• Local customers — segmented by city/region
• High-intent shoppers — recently viewed products but haven't purchased

Klaviyo specifically supports behavioral, purchase, engagement, location and predictive segmentation, and segments update dynamically as customer data changes. Klaviyo Klaviyo Help Center

It also has separate consent handling for email and SMS, which is important—you don't want someone who opted out of texts accidentally receiving SMS because they're still on your email list. Klaviyo Help Center

🥈 ActiveCampaign

I'd choose ActiveCampaign instead if your business is more about leads, sales pipelines, memberships, B2B customers, or complicated automated journeys rather than primarily retail/e-commerce.

Its segmentation can use contact attributes, tags, website actions, email engagement, CRM data and hundreds of other conditions. ActiveCampaign ActiveCampaign Help Center It also supports separate email and SMS marketing lists and targeted SMS segments. ActiveCampaign Help Center ActiveCampaign Help Center

🥉 HubSpot

I'd go with HubSpot if you want the marketing platform tightly integrated with a CRM and sales team—for example, "send this newsletter to customers whose account is X" or "text leads who haven't spoken to sales in 30 days."

It's potentially overkill if all you want is newsletter + SMS marketing.

What I'd pick by business type

• Online store / consumer brand: Klaviyo
• Restaurant / hospitality / local consumer business: Klaviyo
• B2B company with sales team: ActiveCampaign or HubSpot
• Complex lead nurturing: ActiveCampaign
• SMS is the primary channel: Attentive
• Need CRM + marketing + sales in one system: HubSpot
• Simple newsletters with occasional SMS: I'd still lean Klaviyo if sophisticated segmentation matters.

If you tell me roughly how many customers/contacts you have (e.g. 5k, 50k, 500k), whether this is e-commerce/B2B/local business, and whether you already use a CRM like Salesforce/HubSpot or Shopify, I can narrow it down to the best 2–3 and compare the actual pricing.

I'd choose ActiveCampaign instead if your business is more about leads, sales pipelines, memberships, B2B customers, or complicated automated journeys rather than primarily retail/e-commerce.

Its segmentation can use contact attributes, tags, website actions, email engagement, CRM data and hundreds of other conditions. activecampaign.com help.activecampaign.com It also supports separate email and SMS marketing lists and targeted SMS segments.

🥉 HubSpot

I'd go with HubSpot if you want the marketing platform tightly integrated with a CRM and sales team—for example, "send this newsletter to customers whose account is X" or "text leads who haven't spoken to sales in 30 days."

It's potentially overkill if all you want is newsletter + SMS marketing.

What I'd pick by business type

If your priority is one platform that can send both newsletters and targeted SMS to dynamically segmented customer lists, I’d shortlist these:

🥇 My pick: Klaviyo

Klaviyo is probably the strongest fit for what you described. Its segments can update in real time based on purchases, browsing behavior, engagement, location, customer attributes, and other data, and the same customer data can drive both email and SMS campaigns. Klaviyo Klaviyo

For example, you could create segments such as:

• Customers who purchased in the last 30 days
• Customers who haven't purchased in 6 months
• VIP/high-value customers
• Customers who bought Product A but not Product B
• Customers in a particular geographic area
• Customers who engage with SMS but not email
• Customers at risk of churning
• Customers who have opted into SMS but haven't clicked a text recently

Klaviyo can then trigger automated email/SMS flows when someone enters a qualifying segment. Klaviyo Help Center Klaviyo Help Center

When I'd choose the others

HubSpot — choose this if your marketing needs to be tightly connected to a sales CRM, deals, customer service, and lead management. It's more of an all-in-one customer platform than a dedicated email/SMS marketing system. HubSpot supports sending marketing emails to specific segments and triggering emails through workflows. HubSpot Knowledge Base

Mailchimp — excellent if you want something simpler and potentially easier for a small team. It supports segments based on customer information and behavior and can send both email and SMS to those segments. Mailchimp Mailchimp

Attentive — I'd investigate this if SMS is going to be a major revenue channel, particularly for consumer/e-commerce marketing. I'd generally put Klaviyo ahead of it if sophisticated cross-channel segmentation is your primary requirement.

Bottom line

If you tell me (1) approximately how many customers you have, (2) whether you're B2B or B2C, (3) what you're selling, and (4) whether you already use a CRM/e-commerce system such as Salesforce, Shopify, or Square, I can narrow this down to the best 2–3 options and compare their actual pricing and features for your situation.

If your core requirement is newsletters + targeted SMS to the same segmented customer database, I’d shortlist these:

1. Klaviyo — best overall

This would be my default recommendation if segmentation is the priority.

Klaviyo lets you build dynamic segments using customer attributes, purchase history, browsing behavior, engagement, location, preferences, and other data. Those segments can be used across both email and SMS, and they update as customer behavior changes. Klaviyo UK Klaviyo UK Klaviyo Help Center

For example, you could create:

• Customers who purchased in the last 30 days
• VIP customers with lifetime spend > $500
• Customers who haven't purchased in 90 days
• People who viewed Product A but didn't buy
• Customers who prefer SMS
• Email-engaged but SMS-unengaged customers
• Customers in NYC who purchased a particular category
• High-value customers at risk of churning

Klaviyo also has AI-assisted segment creation and predictive segments such as churn risk and customer lifetime value. Klaviyo UK Klaviyo Help Center

Best choice if: you want sophisticated lifecycle marketing rather than simply sending newsletters.

klaviyo.com

2. Omnisend — best for ecommerce/value

I'd choose Omnisend if you're running a Shopify/WooCommerce-style business and want something somewhat simpler.

It supports segmentation based on purchase history, browsing behavior, engagement, demographics, location, tags, and custom properties. The same segments can be used for email, SMS and push, including as triggers for automations. Omnisend Help Center Omnisend

It's particularly attractive if your workflow looks like:

Shopify → customer data → segments → email/SMS campaigns → automated follow-ups

Omnisend explicitly supports combined email/SMS campaigns and unlimited segmentation on its current plans. Omnisend

omnisend.com

3. Braze — best enterprise

Braze is much more powerful than you probably need unless you have a large customer base, sophisticated data infrastructure, or a dedicated marketing/CRM team.

It supports granular real-time segmentation, behavioral triggers, personalization, experimentation, SMS/RCS and cross-channel customer journeys. Braze

Best choice if: you're building complex journeys across email, SMS, push, app, web, etc., and have the budget/team to manage it.

braze.com

What I'd pick

If you aren't specifically ecommerce: Klaviyo

If you're ecommerce/Shopify: Klaviyo or Omnisend, with Omnisend being particularly attractive if simplicity and cost matter.

If you need CRM + marketing + sales in one system: HubSpot

If you're an enterprise with sophisticated customer journeys: Braze

One important consideration: SMS consent is separate from email consent. For example, Omnisend explicitly treats email and SMS subscriptions independently, and Klaviyo provides dedicated SMS-consent segments. Omnisend Help Center Klaviyo Help Center

If you tell me (1) approximate number of customers, (2) whether you're B2B or B2C, (3) Shopify/ecommerce or not, and (4) monthly email/SMS volume, I can narrow this down to the best 2–3 options and compare actual pricing/features for your situation.

If your main requirement is newsletters + highly targeted SMS to the same segmented customer lists, I’d shortlist these:

1. Klaviyo — my first choice

If you're serious about behavior-based targeting, I'd choose Klaviyo.

You can build dynamic segments using things like:

• Purchase history
• Products viewed
• Customer lifetime value
• Engagement
• Location
• VIP status
• Churn risk
• Specific products/categories
• Email vs. SMS engagement

Klaviyo's segments update dynamically, and the same customer data can drive both email and SMS campaigns. Klaviyo AU Klaviyo AU Klaviyo Help Center

For example, you could create:

"Customers who bought Product A in the last 90 days but haven't bought Product B, are SMS opted-in, and have clicked an email in the last 30 days."

Then send them a specific SMS offer while sending a different newsletter to the broader audience.

klaviyo.com

2. Mailchimp — best if you want something simpler

Mailchimp is attractive if you don't need Klaviyo's depth.

Its segmentation can target both email and SMS, including combinations of customer information, engagement, purchase activity, and other conditions. Mailchimp Mailchimp

It's particularly good if your workflow is basically:

Import customers → create segments → design newsletter → send targeted SMS → measure results.

mailchimp.com

3. HubSpot — best if these customers are also sales leads

I'd consider HubSpot if your "customer lists" are really part of a broader CRM/sales operation.

For example, if you want to distinguish:

• Prospects
• Leads
• Existing customers
• High-value customers
• Former customers
• Sales-qualified leads
• Customers assigned to specific sales reps

…and then automate marketing around those lifecycle stages, HubSpot becomes much more compelling. Its email system supports sending to specific contact segments or triggering emails through workflows. HubSpot Knowledge Base

hubspot.com

My recommendation

For most businesses doing both newsletters and targeted SMS: start with Klaviyo.

I'd especially favor it if you have an ecommerce/customer database and want sophisticated segmentation. Klaviyo explicitly supports unified email/SMS customer profiles and behavioral segmentation, including predictive segments. Klaviyo AU Klaviyo Help Center

Choose Mailchimp instead if ease of use and straightforward newsletters matter more than sophisticated behavioral targeting.

Choose HubSpot if the marketing database needs to double as your sales CRM.

One important consideration: SMS consent/compliance is separate from simply having someone's phone number. For example, Mailchimp requires SMS opt-in before marketing texts can be sent. Mailchimp

If you tell me roughly how many customers you have, whether you're B2B or B2C, and whether you're selling products/services, I can narrow this to the best 2–3 options and compare pricing, segmentation, automation, SMS costs, and ease of use.

For sending newsletters + targeted SMS messages to segmented customer lists, the best choice depends heavily on whether you are a retailer/ecommerce brand, service business, B2B company, or a content/newsletter publisher. The strongest options are: Sales Leads CRM Fit Small Business

Klaviyo Fit Small Business## My shortlist by scenario

If you sell products online (Shopify, WooCommerce, DTC)

Pick: Klaviyo

• Segment by: - last purchase date
• customer lifetime value
• products viewed
• abandoned carts
• repeat vs. first-time buyers
• VIP customers
• Great campaigns: - welcome series
• abandoned cart SMS
• replenishment reminders
• win-back campaigns

Klaviyo SoftwareInspect### If you are a service business or B2B company

Pick: HubSpot

• Better when customer records, sales pipelines, and marketing history need to live together.
• Useful segments: - leads by industry
• sales stage
• customer type
• renewal date
• engagement level

Klaviyo### If you want inexpensive email + SMS without a big setup

Pick: Brevo

• Good for: - newsletters
• promotions
• appointment reminders
• basic customer segments
• transactional messages

Fit Small Business### If you mainly send newsletters

Pick: Mailchimp

• Best for: - announcements
• content newsletters
• community updates
• simple audience groups

1→10## Features I would prioritize

Regardless of platform, look for:

• True segmentation (not just separate lists)
• SMS consent management (important for compliance)
• Automation flows - new customer welcome
• inactive customer reactivation
• birthday/anniversary messages
• post-purchase follow-up
• Customer profiles combining email + SMS behavior
• Analytics - revenue per campaign
• conversions
• unsubscribe rates
• SMS opt-outs

Quick recommendation

• Retail/ecommerce: Klaviyo
• B2B with sales team: HubSpot
• Small business on a budget: Brevo
• Newsletter-first organization: Mailchimp
• Marketing automation power users: ActiveCampaign

If you tell me your business type, customer list size, and whether you use Shopify/CRM/another database, I can narrow this to the best 2–3 options.

If your main requirement is email newsletters + targeted SMS to dynamically segmented customer lists, I’d shortlist these:

1. Klaviyo — best overall

Klaviyo is particularly strong if you want to say things like:

• Send an email to customers who purchased Product A but not Product B
• Text customers who bought in the last 30 days
• Email customers who haven't purchased in 6 months
• Send different campaigns to VIP/high-value customers
• Exclude people who recently purchased
• Target based on purchase history, browsing, engagement, location, predicted churn, customer lifetime value, etc.

Its segments update dynamically, and the same customer data can drive both email and SMS campaigns. Klaviyo Klaviyo Klaviyo Help Center

klaviyo.com

I'd choose this if segmentation sophistication is your #1 priority.

2. Omnisend — best easier/cheaper alternative

Omnisend is excellent if you're primarily doing customer/ecommerce marketing and don't need the depth of Klaviyo's customer data platform.

It supports dynamic segmentation based on customer profiles, engagement, purchase behavior and other attributes, and those segments can be used for both email and SMS. Omnisend Help Center Omnisend Help Center

It also has a nice all-in-one campaign workflow for email + SMS + automation. Omnisend

omnisend.com

I'd choose this if you want something powerful without as much complexity/cost.

3. HubSpot — best if you need a CRM

HubSpot makes more sense when your customer segmentation involves sales/CRM data, rather than just purchases and marketing engagement.

You can segment based on contact/company properties, website behavior, marketing engagement, deals and other CRM data, then use those audiences across marketing channels. HubSpot

hubspot.com

I'd choose this for B2B, services, memberships, or businesses with a sales team.

4. Mailchimp — best for straightforward newsletters

Mailchimp remains a good choice if the primary need is email newsletters and your segmentation requirements are relatively simple. I'd put it behind Klaviyo/Omnisend if SMS and sophisticated behavioral targeting are central to the project.

My recommendation

If you tell me nothing else about your business, I'd start with Klaviyo.

The important distinction is that you're not really looking for a "newsletter platform." You're looking for a customer-data + segmentation + email/SMS orchestration platform.

For example, your setup could look like:

Customer database → dynamic segments → email/SMS campaigns

• New customers
• Repeat customers
• VIPs
• Customers by product/category
• Customers by geography
• Customers who haven't purchased recently
• Customers who clicked but didn't buy
• Email-only subscribers
• SMS-only subscribers
• Customers who prefer SMS
• Recently purchased customers to exclude from promotions

Klaviyo explicitly supports this kind of cross-channel segmentation, while Omnisend offers a very similar approach with a simpler ecommerce-oriented workflow. Klaviyo Help Center Omnisend Help Center

One important point: email consent does not automatically mean SMS consent. For U.S. SMS marketing, you need appropriate SMS opt-in/consent and should build your segments around SMS subscribers separately. Omnisend and Klaviyo both provide tools for managing those channel-specific permissions. Omnisend Help Center Omnisend Help Center

If you tell me (1) roughly how many customers/contacts you have, (2) B2B vs. B2C, (3) whether you're using Shopify/another ecommerce system, and (4) your approximate monthly budget, I can narrow this down to the best 2–3 options and compare their actual pricing/features.

It also has a nice all-in-one campaign workflow for email + SMS + automation. Omnisend

omnisend.com

I'd choose this if you want something powerful without as much complexity/cost.

3. HubSpot — best if you need a CRM

HubSpot makes more sense when your customer segmentation involves sales/CRM data, rather than just purchases and marketing engagement.

You can segment based on contact/company properties, website behavior, marketing engagement, deals and other CRM data, then use those audiences across marketing channels. hubspot.com

hubspot.com

I'd choose this for B2B, services, memberships, or businesses with a sales team.

4. Mailchimp — best for straightforward newsletters

Mailchimp remains a good choice if the primary need is email newsletters and your segmentation requirements are relatively simple. I'd put it behind Klaviyo/Omnisend if SMS and sophisticated behavioral targeting are central to the project.

My recommendation

If you tell me nothing else about your business, I'd start with Klaviyo.

The important distinction is that you're not really looking for a "newsletter platform." You're looking for a customer-data + segmentation + email/SMS orchestration platform.

For example, your setup could look like:

If your main requirement is newsletters + targeted SMS to segmented customer lists, I’d shortlist these:

My recommendation

1. Brevo — probably the best starting point if you want one relatively affordable system for email + SMS. It supports email, SMS, automation, segmentation and CRM, and its pricing model can be attractive if you have a large contact database but don't email everyone constantly. Current 2026 comparisons consistently put it among the strongest budget/multichannel choices. Fit Small Business Tajo

2. Klaviyo — choose this if you're an ecommerce business. Its strength is using customer behavior—purchases, browsing, products viewed, order frequency, etc.—to create highly targeted email/SMS segments and automated journeys. Tajo GetOmnichannel

3. HubSpot — best if your customer list is really a CRM/database, rather than simply a newsletter list. HubSpot can segment using CRM properties, behavior and intent, then use those segments across email and SMS workflows. HubSpot HubSpot Its SMS functionality requires the appropriate Marketing Hub/SMS subscription and registration. HubSpot Knowledge Base

4. ActiveCampaign — excellent if you want sophisticated rules such as: "If customer bought X but hasn't bought Y within 60 days, send email A; if they click it, send SMS B; otherwise put them into segment C." Its automation capabilities are one of its major advantages. ActiveCampaign

What I'd choose

• Local business / service business: Brevo or HubSpot
• Shopify/ecommerce: Klaviyo or Omnisend
• B2B with sales pipeline: HubSpot
• Complex automated customer journeys: ActiveCampaign
• Mostly newsletters with occasional SMS: Brevo
• Large list + need to control costs: Brevo is especially worth evaluating because of its send-volume-oriented pricing model. Tajo

The most important thing isn't just whether a platform has "segmentation." I'd make sure it can segment on customer attributes + purchase history + engagement + SMS consent + email engagement, and then use those same segments for both email and SMS.

If you tell me roughly how many customers you have, whether you're ecommerce or service/B2B, and how many emails/SMS messages you expect to send per month, I can narrow this to the best 2–3 options and compare their actual 2026 costs.

3. HubSpot — best if your customer list is really a CRM/database, rather than simply a newsletter list. HubSpot can segment using CRM properties, behavior and intent, then use those segments across email and SMS workflows. hubspot.com hubspot.com Its SMS functionality requires the appropriate Marketing Hub/SMS subscription and registration. knowledge.hubspot.com

4. ActiveCampaign — excellent if you want sophisticated rules such as: "If customer bought X but hasn't bought Y within 60 days, send email A; if they click it, send SMS B; otherwise put them into segment C." Its automation capabilities are one of its major advantages.

What I'd choose

For sending newsletters + targeted SMS messages to segmented customer lists, the best choice depends on whether you care more about ecommerce behavior, CRM data, simplicity, or advanced automation. These are the strongest options: Capterra SoftwareInspect

My shortlist by scenario

If you sell products online

Pick: Klaviyo

• Customer segments based on: - last purchase date
• products bought
• spend level
• browsing behavior
• email engagement
• Email and SMS can share the same customer profile. SoftwareInspect

If you run a local business (appointments, services, memberships)

Pick: ActiveCampaign or Brevo

• Good for: - new customer welcome sequences
• reminders
• reactivation campaigns
• loyalty programs

If you mainly want newsletters plus occasional texts

Pick: Mailchimp + an SMS add-on or Brevo

• Easier setup
• Less complexity
• Good for smaller lists

If SMS revenue is a major channel

Pick: Klaviyo or Attentive

• Better segmentation and personalization
• More sophisticated customer journeys G2 Learn Hub

Features I would prioritize before choosing

• Dynamic segments (segments update automatically)
• Two-way SMS replies
• Purchase/CRM integration
• Automation flows
• A/B testing
• Consent management for SMS compliance
• Revenue attribution (which texts/emails actually produce sales)

A good default recommendation:

• Small business: Brevo or Mailchimp
• Growing business: ActiveCampaign
• Ecommerce: Klaviyo
• High-volume SMS marketing: Attentive

If you tell me your business type, customer list size, and whether you use Shopify/CRM software, I can narrow it to 2–3 best fits.

If your main requirement is one platform that can send newsletters + targeted SMS to dynamically segmented customer lists, I’d shortlist these:

1. Klaviyo — my first choice

klaviyo.com

For what you described, Klaviyo is probably the strongest fit. It treats email and SMS as parts of the same customer profile, and you can create segments based on purchases, browsing behavior, location, engagement, preferences, spending, churn risk, etc. Segments update dynamically as customer data changes. Klaviyo Klaviyo

For example, you could create:

• Customers who purchased in the last 30 days
• Customers who spent $500+
• Customers who bought Product A but not Product B
• Customers in Virginia
• VIP customers
• Customers who haven't purchased in 6 months
• People highly engaged with email but not SMS
• SMS subscribers who clicked your last campaign
• Customers interested in a particular product/category

Then use those same customer attributes to decide who gets an email versus who gets a text. Klaviyo Help Center Klaviyo Help Center

I'd choose Klaviyo if your business is primarily B2C and customer behavior/purchase history is important.

2. ActiveCampaign — excellent if automation is the priority

activecampaign.com

ActiveCampaign is particularly good if you're building sophisticated customer journeys and automations rather than simply sending newsletters.

Its segments can use contact attributes, tags, website activity, purchase history, email engagement, and many other conditions, and segments update dynamically. ActiveCampaign Help Center ActiveCampaign

It also supports SMS-specific segmentation, including targeting people based on how they've interacted with previous texts. ActiveCampaign Help Center

I'd lean toward ActiveCampaign if you have workflows like:

New lead → email sequence → clicked email → wait → SMS → sales follow-up → customer → post-purchase sequence.

3. Brevo — good value

brevo.com

Brevo is worth considering if you want email + SMS without paying for an extremely sophisticated enterprise marketing platform.

Its segments can dynamically update based on customer attributes and events, and you can use those segments for targeted campaigns and automations. Brevo Help Brevo Help

I'd look at Brevo particularly if your database is fairly large and you want to keep software costs under control.

4. HubSpot — best if this is also a CRM problem

hubspot.com

HubSpot makes more sense if you're trying to combine CRM + sales + marketing + email + SMS rather than primarily looking for a newsletter/SMS tool.

Its SMS product can use CRM data to personalize messages and workflows, including managing consent and targeting customers based on where they are in the customer journey. HubSpot

It's powerful, but I'd generally consider it overkill if all you need is segmented newsletters and texts.

My recommendation

For a typical B2C business:

Klaviyo > ActiveCampaign > Brevo > HubSpot

I'd pick Klaviyo if your segmentation is based heavily on customer purchases, behavior, interests, and engagement. Its email/SMS segmentation is particularly mature. Klaviyo Klaviyo Help Center

If you tell me (1) approximately how many customers/contacts you have, (2) whether this is B2B or B2C, (3) what system currently holds your customer list, and (4) roughly how many emails/SMS messages you send per month, I can narrow this down to the best 2 options and compare their likely costs and capabilities.

If your main requirement is one platform for newsletters + targeted SMS + strong customer segmentation, I’d shortlist these:

🥇 My recommendation: Klaviyo

For what you described, Klaviyo is probably the strongest fit. It combines email and SMS around a unified customer profile, and its segments can be based on virtually any combination of customer attributes, purchases, website behavior, email engagement, SMS engagement, location, etc. Klaviyo Klaviyo

For example, you could create segments like:

• Customers who purchased in the last 90 days
• Customers who spent more than $500
• Customers who haven't purchased in 6 months
• Customers interested in Product A
• VIP customers
• Customers who prefer SMS over email
• Highly engaged SMS subscribers
• Customers who viewed a product but didn't buy
• Customers in a particular city
• Customers who opened your last newsletter but didn't purchase

Those segments can then drive both email campaigns and SMS campaigns/automations. Klaviyo's segments update dynamically as customer behavior changes. Klaviyo Help Center Klaviyo Help Center

When I'd choose the others

HubSpot is better if you're really looking for a CRM first, with marketing layered on top. Its audience segmentation can use CRM properties, website behavior, engagement and other data, and those audiences can be activated across marketing channels. HubSpot HubSpot

ActiveCampaign is particularly attractive if your priority is complex automated journeys rather than ecommerce. Its SMS add-on supports broadcast campaigns, two-way messaging, automated SMS, reply triggers, segmentation and personalization. ActiveCampaign Help Center ActiveCampaign

Mailchimp is worth considering if you mainly want newsletters and straightforward campaigns and don't need the depth of behavioral segmentation that Klaviyo offers.

Bottom line

If I were choosing specifically for "send newsletters and targeted SMS to segmented customer lists", I'd rank them:

1. Klaviyo — best overall for sophisticated customer segmentation + email/SMS
2. ActiveCampaign — best for marketing automation
3. HubSpot — best if you also need a serious CRM/sales system
4. Mailchimp — best for simplicity

If you tell me what kind of business you have, approximate number of contacts, and whether you use Shopify/Salesforce/another CRM, I can narrow this down to the best 2–3 options and compare their current pricing.

ActiveCampaign is particularly attractive if your priority is complex automated journeys rather than ecommerce. Its SMS add-on supports broadcast campaigns, two-way messaging, automated SMS, reply triggers, segmentation and personalization.

Mailchimp is worth considering if you mainly want newsletters and straightforward campaigns and don't need the depth of behavioral segmentation that Klaviyo offers.

Bottom line

If I were choosing specifically for "send newsletters and targeted SMS to segmented customer lists", I'd rank them:

If your main requirement is one platform that can send newsletters + targeted SMS to dynamically segmented customer lists, I’d put Klaviyo at the top.

My shortlist

1. 🥇 Klaviyo — my top recommendation

Klaviyo is particularly strong if you want to say things like:

• "Send this newsletter only to customers who purchased in the last 90 days."
• "Text customers in Virginia who bought Product A but haven't bought Product B."
• "Email VIP customers but SMS only those who have opted into SMS."
• "Don't send this promotion to anyone who purchased in the last 7 days."
• "Automatically move customers between segments based on what they do."

Klaviyo's segments can use customer attributes, purchase history, browsing behavior, engagement, location, and predictive data, and they update dynamically. Its email and SMS segmentation can use essentially the same customer data. Klaviyo Klaviyo Help Center

It also has particularly good SMS-specific segmentation—for example, highly engaged SMS subscribers, SMS VIPs, high-intent shoppers, location-based groups, and customers who prefer SMS. Klaviyo Help Center

klaviyo.com

I'd choose Klaviyo if: customer segmentation and targeted communications are the heart of what you're trying to accomplish.

2. 🥈 Brevo — best value

Brevo is worth serious consideration if you don't need Klaviyo's depth.

It supports email campaigns, SMS, automations, and dynamic segments based on things such as demographics, purchase history, location, and engagement. Brevo Brevo Help

A particularly nice feature is that you can create reusable segments such as:

• Recent purchasers
• Customers who haven't purchased in 90 days
• High-value customers
• Inactive subscribers
• Customers in a particular geographic area

and use those segments repeatedly in campaigns and automations. Brevo Help

brevo.com

I'd choose Brevo if: you want email + SMS + segmentation without paying for a more elaborate marketing stack.

3. 🥉 HubSpot — best if you need a CRM

HubSpot becomes very attractive if your "customer list" is really a sales/CRM database.

You can combine CRM information with marketing activity to create targeted audiences, while HubSpot's SMS tools are designed to use CRM data for personalization and targeted campaigns. HubSpot

hubspot.com

I'd choose HubSpot if: you also need sales pipelines, lead management, customer records, forms, meetings, service, etc.

What I'd pick

For an e-commerce or consumer business:
Klaviyo

For a smaller organization wanting affordable email + SMS:
Brevo

For a company where marketing and sales need to share one CRM:
HubSpot

The biggest differentiator is that Klaviyo is built around the customer profile and behavioral segmentation, rather than simply treating your audience as a collection of email/SMS lists. That makes it especially good for the kind of targeted messaging you're describing. Klaviyo Klaviyo Help Center

If you tell me (1) roughly how many customers you have, (2) how many emails/texts you expect to send per month, and (3) whether this is e-commerce, nonprofit, B2B, or a local/service business, I can narrow it down to the best 2–3 options and compare actual current pricing.

If you need both newsletters/email and highly targeted SMS from the same customer segments, I’d shortlist these:

🥇 My recommendation: Klaviyo

For your specific requirement, Klaviyo is probably the strongest fit. Its segmentation can use purchase history, browsing behavior, engagement, location, preferences, predicted churn, customer value, etc., and those segments can be used across both email and SMS. Klaviyo Klaviyo

For example, you could automatically create segments such as:

• VIP customers → exclusive email + SMS offers
• Bought in the last 30 days → cross-sell campaign
• Haven't purchased in 6 months → win-back email
• Viewed Product X but didn't buy → targeted SMS
• High-value customers in Arkansas → local promotion
• SMS-engaged customers → SMS-only flash offers
• Customers at risk of churning → reactivation campaign

Klaviyo's segments update dynamically, so you don't have to continually export and re-upload lists. Klaviyo Help Center Klaviyo Help Center

When I'd choose HubSpot instead

Choose HubSpot if your business is more sales/CRM-oriented than e-commerce-oriented—for example, you have leads, sales reps, deals, appointments, customer service, and marketing all interacting with the same database. Its audience segments can incorporate CRM properties, website activity, engagement, deal data, and custom data. HubSpot HubSpot

HubSpot also supports SMS campaigns using CRM data and workflows. HubSpot

When I'd choose Braze

If you're talking about hundreds of thousands or millions of customers, sophisticated real-time journeys, apps, push notifications, SMS/RCS, and very advanced personalization, I'd look seriously at Braze. It supports granular real-time segmentation across channels and behavioral triggers. Braze Braze

Bottom line:

• Small/midsize business or e-commerce → Klaviyo
• B2B / sales-driven company → HubSpot
• Large enterprise / sophisticated lifecycle marketing → Braze
• SMS is your primary marketing channel → Attentive

If you tell me what kind of business you have, roughly how many customers/contacts you have, and what system currently holds your customer list (Shopify, Salesforce, Excel, etc.), I can narrow this down to the best 1–2 options and compare pricing, SMS costs, segmentation, automation, and ease of use.

HubSpot also supports SMS campaigns using CRM data and workflows.

When I'd choose Braze

For sending newsletters + targeted SMS messages to segmented customer lists, the best software depends mostly on whether you are an ecommerce brand, local business, B2B company, or community/organization. The strongest options combine customer segmentation, automation, email deliverability, and SMS compliance. SoftwareInspect Sequenzy

Top picks

My recommendations by situation

If you sell products online (Shopify, WooCommerce, DTC)

Choose:

1. Klaviyo — best overall for advanced segments like: - bought product A but not B
2. high-value customers
3. customers inactive for 90 days
4. abandoned carts
5. VIP customers

SoftwareInspect1. Omnisend — better if you want something simpler and lower-cost while still doing email + SMS automation. TechRadar

If you run a service business (clinic, agency, membership, local business)

Choose:

• ActiveCampaign for sophisticated customer journeys.
• Brevo for a simpler, affordable email/SMS setup. Sequenzy TechRadar

If you mainly send newsletters but want occasional texts

Choose:

• Mailchimp for ease of use.
• Brevo if SMS is a core channel. Influencer Marketing Hub TechRadar

If you have a large customer database and complex targeting

Consider:

• HubSpot (CRM-centered)
• ActiveCampaign
• Customer.io (event-based messaging for apps/SaaS) Sequenzy

Features I would prioritize

For segmented customer messaging, look for:

• Dynamic segments (not just static lists)
• Tags/custom fields
• Purchase or behavior tracking
• Automated journeys
• SMS opt-in management and compliance tools
• Two-way texting support
• Integration with your CRM, ecommerce platform, or POS
• Reporting by customer segment

Shortlist

If I had to narrow it down:

• Best overall: Klaviyo
• Best value: Brevo
• Best for ecommerce beginners: Omnisend
• Best for B2B/service businesses: ActiveCampaign
• Best simple newsletter tool: Mailchimp

If you tell me your business type, approximate customer list size (e.g., 5,000 vs. 500,000), and whether you use Shopify/CRM/POS, I can narrow this to the top 2–3 choices.

If your main requirement is newsletters + targeted SMS to segmented customer lists, I’d shortlist these:

1. Klaviyo — my first choice

klaviyo.com is probably the strongest fit if segmentation is the priority.

You can segment customers using purchase history, browsing behavior, engagement, customer value, churn risk, SMS engagement, etc., with segments updating dynamically. It also lets you build coordinated email + SMS campaigns and automated flows. Klaviyo Klaviyo Klaviyo

Example:

• Customers who bought in the last 30 days → email newsletter
• Customers who haven't purchased in 90 days → SMS offer
• VIP customers → exclusive email + SMS
• Customers who viewed Product A but didn't buy → targeted email
• High-value customers who haven't purchased recently → win-back SMS

This is the one I'd pick if you're doing serious customer segmentation and lifecycle marketing.

2. HubSpot — best if you want a CRM too

hubspot.com is excellent if your customer lists are part of a broader sales/CRM operation.

Its segmentation can use customer properties, website behavior, engagement, deal information, and other CRM data. Those segments can then drive email and SMS campaigns. HubSpot HubSpot

It also has a newsletter builder specifically designed for sending personalized newsletters to targeted lists. HubSpot

I'd choose HubSpot over Klaviyo if you also need sales pipelines, lead management, customer service, forms, website tracking, etc.

3. Omnisend — excellent value for ecommerce

omnisend.com is worth serious consideration if you're selling products online.

It combines email, SMS, segmentation and ecommerce automation. Segments can be based on behavior, purchase history and engagement, and you can build workflows combining email and SMS. Omnisend

It's particularly attractive if you want Klaviyo-like ecommerce functionality without necessarily paying Klaviyo-level pricing.

4. Brevo — good simpler/affordable choice

brevo.com supports both email and SMS campaigns and lets you create reusable segments based on things such as location, language and behavior. Brevo Help

I'd lean toward Brevo if your needs are more like:

"I have 20,000 customers, I want to divide them into 10–20 lists, send a weekly newsletter, and occasionally send targeted texts."

rather than sophisticated ecommerce behavioral automation.

My recommendation

If you tell me what kind of business you have and roughly how many customers/contacts you have, I can narrow this down considerably.

As a starting point:

• Ecommerce + sophisticated targeting: Klaviyo
• Ecommerce + want to save money: Omnisend
• B2B / sales organization / CRM: HubSpot
• Small business + straightforward email/SMS: Brevo

If you give me your number of contacts, whether you're B2B or B2C, what you're selling, and whether your customer data is currently in Excel/Google Sheets, Shopify, Salesforce, etc., I can also compare the actual 2026 pricing and recommend the cheapest option that will handle your segmentation requirements.

Its segmentation can use customer properties, website behavior, engagement, deal information, and other CRM data. Those segments can then drive email and SMS campaigns. HubSpot HubSpot

It also has a newsletter builder specifically designed for sending personalized newsletters to targeted lists. HubSpot

I'd choose HubSpot over Klaviyo if you also need sales pipelines, lead management, customer service, forms, website tracking, etc.

3. Omnisend — excellent value for ecommerce

omnisend.com is worth serious consideration if you're selling products online.

It combines email, SMS, segmentation and ecommerce automation. Segments can be based on behavior, purchase history and engagement, and you can build workflows combining email and SMS. omnisend.com

It's particularly attractive if you want Klaviyo-like ecommerce functionality without necessarily paying Klaviyo-level pricing.

4. Brevo — good simpler/affordable choice

brevo.com supports both email and SMS campaigns and lets you create reusable segments based on things such as location, language and behavior.

I'd lean toward Brevo if your needs are more like:

"I have 20,000 customers, I want to divide them into 10–20 lists, send a weekly newsletter, and occasionally send targeted texts."

rather than sophisticated ecommerce behavioral automation.

If your main requirement is one platform that can send newsletters + targeted SMS to segmented customer lists, I’d shortlist these:

1. Klaviyo — my first choice

klaviyo.com is probably the strongest fit if segmentation is the priority.

You can build segments using virtually any customer data—purchase history, behavior, demographics, location, engagement, custom properties, etc.—and use those same audiences across email and SMS. Klaviyo also supports real-time segments and predictive segments such as churn risk and customer lifetime value. Klaviyo Klaviyo

For example:

• Customers who bought in the last 30 days → email newsletter
• Customers who haven't bought in 6 months → reactivation email + SMS
• VIP customers → exclusive SMS offer
• Customers interested in Product A → Product A newsletter
• Customers near a physical location → local-event SMS
• Highly engaged SMS subscribers → early-access text

Klaviyo has particularly strong SMS segmentation capabilities, including VIP, high-intent, location-based, engagement, language and channel-preference segments. Klaviyo Help Center Klaviyo Help Center

Choose it if: you expect your marketing to become increasingly personalized and automated.

2. Omnisend — best simpler/value option

omnisend.com is an excellent alternative, particularly for e-commerce.

It supports segmentation based on customer profile, engagement, website behavior, purchase history, orders and custom events, with segments updating dynamically. Those segments can be used across email, SMS and automation. Omnisend Help Center Omnisend Help Center

One particularly nice feature is that you can use the same segment for both email and SMS, while respecting separate channel opt-ins. Omnisend Help Center

Choose it if: you want powerful segmentation without as much complexity as Klaviyo.

3. HubSpot — best if you need a CRM

hubspot.com makes more sense if your customer data already lives in a CRM and you want marketing tied closely to sales/service activity.

I'd choose HubSpot over Klaviyo when you need things like sales pipeline + CRM records + marketing automation + customer communications in one system.

4. Attentive — best if SMS is the star

attentive.com is worth considering when SMS is a major revenue channel and you want sophisticated SMS marketing. If newsletters are equally important, I'd generally start with Klaviyo or Omnisend.

My recommendation

For your exact wording—"newsletters and targeted SMS messages to segmented customer lists"—I'd rank them:

1. Klaviyo → best overall
2. Omnisend → best balance of capability and simplicity
3. HubSpot → best if you also need a serious CRM
4. Attentive → best if SMS is the primary channel

If you tell me roughly how many customers/contacts you have (e.g. 5k, 50k, 500k), whether you're e-commerce or a service business, and whether you already use Shopify/another CRM, I can narrow this down to the best 2 and compare current pricing, SMS costs, segmentation, automation, and ease of use.

If you want one platform that handles newsletters + targeted SMS + sophisticated customer segmentation, I’d shortlist these:

🥇 My first choice: Klaviyo

If your customer data includes things like purchase history, interests, location, engagement, customer value, products purchased, or browsing behavior, Klaviyo is probably the strongest fit.

Its segments can update in real time and can use behavioral, transactional and profile data. It also supports segmentation across email and SMS, so you can build something like:

• VIP customers → email + exclusive SMS
• Purchased in last 30 days → product education email
• Haven't purchased in 6 months → win-back campaign
• Viewed Product A but didn't buy → targeted email
• SMS-engaged customers → SMS-only promotion
• High-value customers in Pennsylvania → localized campaign
• Email-engaged but SMS-unsubscribed → email campaign only

Klaviyo specifically supports sophisticated SMS segments such as VIPs, highly engaged subscribers, high-intent shoppers, location-based segments and customers who prefer SMS. Klaviyo Klaviyo Help Center

🥈 Omnisend — probably the best alternative

If you're running an online store and don't need Klaviyo's maximum level of sophistication, I'd seriously consider Omnisend.

It combines email and SMS campaigns, automation, and segmentation in one system. Segments can use purchase history, browsing behavior, demographics, engagement, tags and other customer data, and the same segments can be used for both email and SMS. Omnisend Omnisend Help Center

Omnisend is particularly attractive if price and simplicity matter. Its current positioning is explicitly around providing similar ecommerce email/SMS functionality at a lower cost than Klaviyo. Omnisend

🥉 ActiveCampaign — if you're not primarily ecommerce

I'd choose ActiveCampaign if your business is more B2B, professional services, membership, education, nonprofit, or lead-generation oriented.

Its segmentation can dynamically respond to contact attributes, tags and actions, and it has extensive automation capabilities. ActiveCampaign Help Center ActiveCampaign

Its SMS functionality is available through an SMS add-on, including conditions based on how contacts interact with your texts. ActiveCampaign Help Center

What I'd choose

Ecommerce: Klaviyo → Omnisend
Small/medium ecommerce business wanting to control costs: Omnisend
Complex B2B/customer journeys: ActiveCampaign
CRM + sales pipeline + marketing all in one: HubSpot
Most sophisticated email + SMS segmentation: Klaviyo

One important point: email consent and SMS consent need to be treated separately. For example, someone subscribing to your newsletter doesn't automatically mean they're opted in to promotional SMS. Omnisend explicitly distinguishes the two consent states, and Klaviyo provides dedicated SMS-consent segments. Omnisend Help Center Klaviyo Help Center

If you tell me (1) roughly how many customers/contacts you have, (2) whether you're ecommerce or B2B/service, and (3) whether you use Shopify/another CRM, I can narrow this down to the best 2–3 options and compare their current pricing and features.

For sending newsletters + targeted SMS messages to segmented customer lists, the best software depends mostly on whether you are a retailer/ecommerce brand, B2B company, nonprofit, local business, or creator. The strongest options today are: Fit Small Business SoftwareInspect

Fit Small Business SoftwareInspect## My shortlist by use case

If you sell products online (Shopify, WooCommerce, retail)

Pick: klaviyo.com
Best for segments like:

• Customers who bought product X but not product Y
• High-value customers
• Customers who have not purchased in 90 days
• People who abandoned carts
• VIP customers

Klaviyo is especially strong because email and SMS can use the same customer profile and behavioral data. Klaviyo

If you have a sales team or B2B customers

Pick: hubspot.com
Good for:

• Leads by industry
• Prospects at different sales stages
• Automated follow-ups
• Newsletter + sales pipeline coordination

If you just need reliable newsletters and occasional texts

Pick: mailchimp.com or brevo.com
Good for:

• Monthly newsletters
• Promotions
• Event announcements
• Basic customer groups

If you want sophisticated automation without a full CRM

Pick: activecampaign.com
Good for:

• Multi-step campaigns
• Behavior-triggered messages
• Lead nurturing sequences

Features I would prioritize

Whatever you choose, make sure it supports:

• Dynamic segments (not just static lists)
• Email + SMS in the same customer profile
• Automation flows (“if this happens, send that”)
• Consent management for SMS compliance
• Purchase/event tracking
• A/B testing
• Integration with your CRM, website, or ecommerce platform

If you tell me:

1. your business type (retail, service, nonprofit, etc.),
2. approximate list size (1,000 / 10,000 / 100,000+ contacts), and
3. whether you use Shopify, Salesforce, WordPress, etc.,

I can narrow this to the top 2–3 choices.

The “best” platform depends heavily on whether your customers are ecommerce shoppers, B2B leads, members/subscribers, or local service customers. For sending newsletters + targeted SMS to segmented customer lists, these are the strongest options:

My shortlist by use case

• Online store (Shopify, WooCommerce, DTC):

→ klaviyo.com
Best if you want segments like:

• “Bought product X but not product Y”
• “VIP customers”
• “No purchase in 90 days”
• “Viewed product but didn’t buy”
• Local business (appointments, memberships, repeat customers):

→ activecampaign.com or hubspot.com
Better for:

• customer type
• service history
• sales stage
• follow-up sequences
• Newsletter-first organization with occasional SMS:

→ mailchimp.com or brevo.com

• High-volume SMS campaigns:

Consider pairing a strong CRM/email platform with an SMS specialist such as attentivemobile.com or simpletexting.com, depending on your workflow. SaaS CRM Review StackBriefly

Features I would prioritize

For segmented customer messaging, look for:

• Dynamic segments (automatically update lists)
• Purchase/behavior tracking
• Email + SMS using the same customer profile
• Automated journeys (“welcome,” “win-back,” “birthday,” “renewal”)
• A/B testing
• Consent management for SMS compliance
• CRM and ecommerce integrations

If you tell me:

1. your business type (ecommerce, nonprofit, services, B2B, etc.),
2. approximate customer list size, and
3. whether you already use a CRM or Shopify,

I can narrow this to the top 2–3 choices.

If your main requirement is one platform for newsletters + targeted SMS + strong customer segmentation, I’d put Klaviyo at the top.

My shortlist

1. Klaviyo — my first choice

Klaviyo is particularly strong if you want to say things like:

• Send this newsletter only to customers who bought Product A.
• Text customers who purchased in the last 90 days but haven't purchased again.
• Send VIP customers an early-access SMS.
• Email customers who haven't opened anything in 6 months.
• Send different campaigns based on location, purchase history, engagement, interests, or predicted churn.
• Automatically move people into/out of segments as their behavior changes.

Klaviyo's segments update in real time and can incorporate purchase history, website behavior, engagement, location, predicted customer lifetime value, churn risk, and other data. The same segmentation infrastructure can be used across email and SMS. Klaviyo Klaviyo Klaviyo Help Center

It also has particularly mature SMS segmentation—for example, highly engaged SMS users, SMS VIPs, high-intent shoppers, location-based segments, language segments, and people who prefer SMS over email. Klaviyo Help Center

klaviyo.com

I'd choose it if: your customer database and targeting are important enough that you don't want to outgrow the system.

2. Brevo — best value/simple alternative

Brevo is worth a serious look if Klaviyo feels more sophisticated—and potentially more expensive/complex—than you need.

It supports email campaigns, SMS, automations, and segmentation based on things like demographics, purchase history, behavior, location, and engagement. Brevo Brevo Help

One nice feature is that Brevo has segment templates for common use cases, including unengaged email contacts and SMS contacts who haven't been contacted recently. Brevo Help

brevo.com

I'd choose it if: you're primarily sending newsletters and occasional targeted texts and don't need extremely sophisticated ecommerce/customer analytics.

3. HubSpot — best if you need a CRM

HubSpot makes more sense when newsletters/SMS are only part of a larger sales and customer-management operation.

It's particularly attractive if your segmentation needs to combine marketing activity + sales pipeline + customer records + website activity.

hubspot.com

I'd choose it if: you're also trying to manage leads, salespeople, deals, customer service, and marketing in one CRM.

What I'd pick

For a business with an existing customer list:
Klaviyo → Brevo → HubSpot, in that order.

The deciding question is really how sophisticated your segmentation needs to be. If you want targeted messaging based on what someone bought, when they bought it, how often they buy, whether they engage with email/SMS, what they've browsed, and their customer value, Klaviyo is substantially closer to the ideal tool. Klaviyo Klaviyo Help Center

If you tell me roughly how many customers/contacts you have (e.g. 5k, 50k, 500k), whether you're B2B or B2C, and whether you already have a CRM/ecommerce system, I can narrow this down to the best 2–3 options and compare their current pricing.

If your main requirement is newsletters + targeted SMS to the same segmented customer database, my top pick is klaviyo.com.

My ranking

🥇 Klaviyo — best overall

Klaviyo is particularly strong if you want to say things like:

• "Send this newsletter only to customers who bought Product A."
• "Text customers who haven't purchased in 90 days."
• "Email high-value customers but SMS only the ones who opted into texts."
• "Send a different promotion to customers in Michigan."
• "Automatically message people who viewed a product but didn't buy."
• "Don't send this campaign to customers who purchased in the last 7 days."

Its segmentation can combine purchase history, website behavior, engagement, location, preferences, and predictive attributes such as churn risk, customer lifetime value, and predicted next order date. Segments update dynamically as customer data changes. Klaviyo Klaviyo Klaviyo Help Center

It also treats email and SMS as coordinated channels, rather than making you maintain two disconnected marketing databases. Klaviyo Help Center

klaviyo.com
klaviyo.com

🥈 HubSpot — best if you have a sales team

hubspot.com is more of a full CRM/business platform. I'd choose it over Klaviyo if your marketing needs to connect tightly with salespeople, leads, deals, customer service, and a broader CRM.

HubSpot supports contact segmentation and SMS campaigns using CRM data, with workflows for personalization and consent management. HubSpot Knowledge Base HubSpot

The downside: it can become substantially more expensive/complex if all you really want is customer newsletters and promotional texting.

🥉 Brevo — best value

brevo.com is worth considering if you have a relatively straightforward use case and want email + SMS without paying for the depth of Klaviyo.

I'd lean Brevo for a small business with simpler segmentation and Klaviyo for sophisticated behavioral targeting/e-commerce.

What I'd choose

If you're a B2C company with an existing customer list:
→ Klaviyo

If you're a B2B company with sales reps and a CRM:
→ HubSpot

If price is a major consideration:
→ Brevo

If SMS is essentially your primary marketing channel:
→ Consider Attentive alongside Klaviyo.

One important point: for SMS, don't simply upload your entire customer list and start texting it. SMS marketing requires appropriate consent, and the email and SMS permissions should be treated separately. Klaviyo specifically recommends collecting consent independently for each channel. Klaviyo Help Center

If you tell me roughly how many customers/contacts you have (e.g. 5k, 50k, 500k), whether you're B2B or B2C, and what system currently holds your customer list, I can narrow this down to the best 2–3 options and compare their actual pricing.

If your main requirement is email newsletters + targeted SMS to dynamically segmented customer lists, my top pick is Klaviyo.

My ranking

🥇 Klaviyo — best overall

Klaviyo is particularly strong if your goal is "send different messages to different types of customers" rather than simply blast a newsletter.

Its segments can update dynamically based on things such as:

• Purchase history
• Products viewed
• Customer location
• Email/SMS engagement
• VIP status
• Predicted churn
• Customer lifetime value
• Recent purchases
• Specific product/category interests

It can use those same customer segments across email and SMS, and trigger automated flows when someone enters a segment. www.klaviyo.com

For example, you could have:

Segment A — VIP customers
→ Monthly VIP email + occasional VIP-only SMS

Segment B — Haven't purchased in 90 days
→ Win-back email → 3 days later targeted SMS

Segment C — Bought Product A
→ Email recommending Product B → SMS when there's a promotion

Segment D — Local customers
→ Email about an in-person event → SMS reminder the morning of the event

Klaviyo also has built-in recommended SMS segments such as highly engaged subscribers, SMS VIPs, high-intent shoppers, location-based customers, and customers who prefer SMS. help.klaviyo.com

Klaviyo

🥈 HubSpot — best if you need a CRM

HubSpot is the better choice if you're trying to combine marketing + sales + customer records + automation.

You can send email campaigns to specific contact segments and use workflows for automation. HubSpot also supports marketing SMS, although SMS requires the appropriate paid SMS capability/add-on. knowledge.hubspot.com

I'd lean toward HubSpot if you have salespeople managing leads/customers. I'd lean toward Klaviyo if marketing communications are the primary objective.

HubSpot

🥉 ActiveCampaign — best for sophisticated automation

ActiveCampaign is excellent when the heart of your strategy is complex automation—e.g., if X happens, wait 2 days, check whether Y happened, then send Z.

It's particularly attractive for service businesses, B2B, courses, memberships, and businesses with elaborate lead-nurturing sequences.

ActiveCampaign

What I'd choose

If you sell products / have a customer database: → Klaviyo

If you need CRM + sales pipeline + marketing: → HubSpot

If automation logic is the priority: → ActiveCampaign

If you mostly want straightforward newsletters: → Mailchimp

One important consideration: SMS consent is separate from email consent, so whichever platform you choose, build your lists around explicit SMS opt-in and keep email/SMS preferences separate. Klaviyo specifically recommends collecting consent separately for the two channels. help.klaviyo.com

If you tell me what kind of business you have, roughly how many customers/contacts you have, and whether you're B2B or B2C, I can narrow this down to the best 2–3 options and compare actual pricing, SMS costs, segmentation, automation, and ease of use for your situation.

If your main requirement is one platform for email newsletters + targeted SMS to dynamically segmented customer lists, I’d put Klaviyo at the top.

My shortlist

1. klaviyo.com — my first choice

Klaviyo is particularly strong if you want to say things like:

• Send this newsletter only to customers who bought Product A
• Text customers who haven't purchased in 90 days
• Email VIP customers differently from occasional buyers
• Send an SMS to people who viewed a product but didn't purchase
• Exclude people who received another promotion recently
• Automatically move customers between segments as their behavior changes

Its segments can use purchase history, browsing behavior, engagement, location, preferences, predicted customer lifetime value, churn risk, and other customer data. The segments update dynamically. Klaviyo Klaviyo

It also treats email and SMS as coordinated channels, so you can build a segment once and decide whether that audience should receive email, SMS, or both. Klaviyo Help Center

I'd choose Klaviyo if: you're primarily doing B2C/customer marketing, particularly ecommerce, retail, hospitality, events, or another business where customer behavior and purchase history matter.

help.klaviyo.com

2. hubspot.com — best if you need a serious CRM

HubSpot makes more sense if your customer database is also being used for sales, lead management, customer service, and marketing.

You can send emails to specific contact segments or trigger them through workflows, and its SMS product uses CRM data to personalize messages. HubSpot Knowledge Base HubSpot

I'd choose HubSpot if: you have salespeople, leads/opportunities, account management, B2B customers, or a need for a centralized CRM beyond marketing.

The downside is that it can become substantially more expensive and complex than a dedicated email/SMS marketing platform.

3. activecampaign.com — excellent for automation

ActiveCampaign is worth considering if your differentiator is complex automated customer journeys rather than ecommerce analytics specifically.

It's particularly good for sequences such as:

Customer joins list → receives welcome email → clicks product → waits 2 days → receives SMS → purchases → enters post-purchase sequence → receives cross-sell email.

I'd choose it if: you're building sophisticated lifecycle automation and don't necessarily need Klaviyo's ecommerce-centric data model.

4. omnisend.com — simpler ecommerce option

Omnisend is another strong choice for ecommerce businesses that want email + SMS without quite as much complexity.

I'd choose it if: you want something relatively straightforward and your segmentation/automation requirements aren't extremely advanced.

What I'd pick

For most businesses with an existing customer list: Klaviyo.

The biggest reason isn't simply that it can send newsletters and texts. It's the customer-data/segmentation engine underneath both channels. For example, Klaviyo supports segments such as VIP customers, high-intent shoppers, location-based audiences, SMS-engaged customers, churn-risk customers, and product-specific audiences. Klaviyo Help Center Klaviyo Help Center

If you tell me what type of business you have, roughly how many customers are on the list, and whether you're using Shopify/another ecommerce platform/CRM, I can narrow this down to the best 1–2 options and explain the likely cost and setup.

For sending newsletters + targeted SMS messages to segmented customer lists, the best software depends heavily on whether you’re a small business, ecommerce brand, nonprofit, or enterprise. The strongest options today are platforms that keep email, SMS, customer profiles, and automation rules together rather than treating SMS as a separate blast tool. SoftwareInspect Insider One

Best overall picks

My shortlist by scenario

If you sell products online

Choose:

1. Klaviyo — best for sophisticated segmentation (VIP customers, abandoned carts, repeat buyers, churn risk).
2. Omnisend — simpler ecommerce-focused alternative.
3. Postscript — worth considering if your business is heavily Shopify/SMS-driven. Saas CRM Review

If you’re a local business, service company, or nonprofit

Choose:

1. Brevo — good email + SMS value.
2. Mailchimp — easiest newsletter setup.
3. Constant Contact — beginner-friendly with support options. G2 Learning Hub

If you have a sales team

Choose:

1. HubSpot — best when marketing needs to connect to CRM records.
2. ActiveCampaign — strong automation without a full enterprise CRM. Fit Small Business EmailTooltester.com

Features I’d prioritize

For segmented customer messaging, look for:

• Dynamic segments (e.g., “customers who bought in the last 90 days but haven’t purchased recently”)
• Behavior triggers (clicked email, visited page, abandoned cart, attended event)
• SMS consent management and compliance tools
• Two-way texting if customer replies matter
• A/B testing
• Customer profiles combining email + SMS activity
• Integrations with your CRM, ecommerce platform, or POS

A practical recommendation

For most small-to-medium businesses:

• Best balance: Brevo or ActiveCampaign
• Best for revenue-focused ecommerce: Klaviyo
• Best simple newsletter solution: Mailchimp
• Best if customer data is spread across sales and marketing: HubSpot

If you tell me your business type, list size (e.g., 5k vs 500k contacts), and whether you use Shopify/CRM/POS, I can narrow this to the top 2–3 choices.

If your priority is one platform that can send both newsletters/email and highly targeted SMS to segmented customer lists, my top pick is Klaviyo.

My shortlist

1. 🏆 Klaviyo — best overall

Klaviyo is particularly strong if you want segmentation to drive both email and SMS.

You can segment customers by things like:

• Purchase history
• Products/categories purchased
• Location
• Spending/AOV
• Engagement
• VIP status
• Churn risk
• Website/product-view behavior
• Email vs. SMS preference
• Predicted next purchase

Klaviyo's segments update dynamically, and the same customer segments can be used across email and SMS. Klaviyo Klaviyo

For example, you could create:

VIP customers + purchased in last 90 days + SMS opted-in

…and send them an exclusive text while sending a different newsletter to your broader customer base.

Klaviyo also has specific SMS segmentation capabilities for highly engaged subscribers, VIPs, high-intent shoppers, geographic groups, and language preferences. Klaviyo Help Center Klaviyo Help Center

klaviyo.com

I'd choose this if customer segmentation and targeted campaigns are the main objective.

2. HubSpot — best if you also need a CRM

HubSpot is better if you're trying to combine marketing with sales/customer-service data.

It's especially attractive if your segments need to incorporate things like:

• Lead status
• Sales pipeline
• Company/account information
• Sales rep ownership
• Customer lifecycle stage
• Website activity
• Email engagement

HubSpot supports marketing SMS, but SMS requires the applicable marketing/SMS subscription and registration/approval. HubSpot Knowledge Base

hubspot.com

I'd choose HubSpot over Klaviyo if your sales CRM is as important as your marketing.

3. Brevo — best budget-conscious option

Brevo is worth considering if you want email + SMS without moving into a more sophisticated marketing-automation setup.

brevo.com

I'd choose it for a smaller organization that wants straightforward campaigns and reasonable costs.

4. Omnisend — excellent for ecommerce

Omnisend is a strong alternative to Klaviyo if you're primarily an online retailer.

Its sweet spot is automated customer marketing around ecommerce events—purchases, abandoned carts, browsing, promotions, etc.

omnisend.com

I'd shortlist this alongside Klaviyo for an ecommerce business.

What I'd pick

For a typical customer database:

Klaviyo > HubSpot > Brevo

For ecommerce:

Klaviyo ≈ Omnisend > HubSpot

For B2B / sales-driven organizations:

HubSpot > Klaviyo

One important consideration: don't treat your email list and SMS list as interchangeable. SMS requires separate consent, and your targeting should respect each person's channel preferences. Klaviyo explicitly recommends managing email and SMS consent separately while allowing essentially the same behavioral/customer segmentation across both channels. Klaviyo Help Center

If you tell me (1) roughly how many customers/contacts you have, (2) whether you're B2B, ecommerce, nonprofit, etc., and (3) whether you already use a CRM, I can narrow this to the best 2–3 options and compare actual pricing/features for your situation.

If your main requirement is one system that can email and SMS the same customer based on detailed segments, I’d shortlist these:

1. Klaviyo — my first choice

For targeted customer communication, Klaviyo is probably the strongest fit. Its segmentation can combine customer attributes, purchase history, browsing behavior, engagement, location, and predictive metrics such as churn risk and predicted customer lifetime value. The same customer segments can be used across email and SMS. www.klaviyo.com

For example, you could create:

• Customers who purchased in the last 30 days
• Customers who haven't purchased in 90 days
• VIP customers spending >$500
• Customers who bought Product A but not Product B
• Customers in California
• Highly engaged email customers
• Customers who specifically prefer SMS
• High-intent shoppers who viewed a product but didn't buy

Klaviyo also supports dynamic segments that update as customer behavior changes, which is particularly useful for automated campaigns. www.klaviyo.com

Choose Klaviyo if: customer behavior and sophisticated segmentation are more important than having the absolute lowest software cost.

2. Brevo — best value

Brevo is worth considering if you want email + SMS + CRM functionality without going as far upmarket. Its segments can be dynamically updated based on contact attributes and behavior, and can be used directly for targeted email campaigns and automations. help.brevo.com

It's particularly attractive if you have a relatively straightforward customer database and don't need Klaviyo's deeper e-commerce/predictive capabilities.

3. HubSpot — best if you want a full CRM

If your customer lists need to connect with sales, customer service, deals, forms, website activity, and marketing, HubSpot becomes more compelling.

I'd choose it over Klaviyo when your fundamental problem is "I need one database for my customers and prospects", rather than simply "I need the best email/SMS marketing engine."

What I'd pick

E-commerce / retail: → Klaviyo

Small business wanting affordable email + SMS: → Brevo

B2B or sales-driven company: → HubSpot

Primarily newsletters with relatively simple targeting: → Mailchimp

One important consideration: SMS compliance/consent is a separate issue from simply having a customer phone number. Your platform should maintain explicit SMS opt-in status and suppress people who aren't eligible to receive marketing texts. Klaviyo, for example, provides dedicated SMS-consent segments and recommends engagement-based SMS segmentation. help.klaviyo.com

If you tell me (1) roughly how many customers you have, (2) whether you're e-commerce/B2B/local business, (3) Shopify or another CRM/database, and (4) your approximate monthly budget, I can narrow this to the best 2–3 options and compare actual pricing/features for your situation.

If your priority is one platform that can send both newsletters and targeted SMS to dynamically segmented customer lists, I’d shortlist these:

1. Klaviyo — my first choice

Klaviyo is particularly strong if you're marketing to existing customers and want segments such as:

• Purchased in the last 30 days
• Hasn't purchased in 90 days
• VIP/high-value customers
• Bought Product A but not Product B
• Lives in a particular location
• Clicked an email but didn't purchase
• Highly engaged SMS subscribers
• Prefers SMS vs. email

Its segments update dynamically, and the same customer data can drive both email and SMS campaigns. Klaviyo specifically supports behavioral, purchase-history, engagement, location, and predictive segmentation. www.klaviyo.com

I'd choose Klaviyo if: you're a retailer, e-commerce business, membership business, hospitality business, or other B2C company where customer behavior matters.

2. ActiveCampaign — best for sophisticated automation

ActiveCampaign is excellent if you want your newsletter/SMS system to behave more like a marketing automation engine.

You can segment based on contact fields, tags, website behavior, purchase history, email engagement, and other actions. Its SMS functionality can also use engagement with previous SMS messages for targeting. help.activecampaign.com

It also supports coordinating email, SMS and WhatsApp from shared customer data. www.activecampaign.com

I'd choose ActiveCampaign if: you have lead nurturing, sales funnels, multiple customer journeys, or complicated if/then automation.

3. Brevo — best value

Brevo is worth a serious look if you don't need the depth of Klaviyo/ActiveCampaign. It supports dynamic segments based on attributes, demographics, purchase history and engagement, and those segments can be used for targeted campaigns. www.brevo.com

I'd choose Brevo if: you're an SMB that wants email + SMS without paying for a much larger marketing stack.

4. HubSpot — best if you need a CRM

If your customer database is also being used by a sales team, HubSpot becomes more compelling. You can combine marketing segmentation with CRM information, sales activity, lifecycle stages, etc.

The downside is that it can become considerably more expensive/complex than a dedicated email/SMS platform.

My recommendation

For the specific requirement you gave:

Newsletters + targeted SMS + segmented customer lists

I'd rank them:

🥇 Klaviyo — best overall
🥈 ActiveCampaign — best automation/CRM flexibility
🥉 Brevo — best value
4. HubSpot — best if you also need a substantial CRM

One particularly important consideration is how your customer data gets into the platform. If you tell me what you're using today (e.g. Shopify, WooCommerce, Square, Salesforce, Excel/CSV, a custom database, etc.) and roughly how many customers/contacts you have, I can narrow this down to the best 1–2 options and compare actual pricing, SMS costs, segmentation capabilities, and integrations.

If your core requirement is newsletters + targeted SMS to dynamically segmented customer lists, I’d shortlist these:

My #1: Klaviyo

For your exact use case, Klaviyo is probably the strongest choice.

Its segments can update in real time using essentially any customer data you have, including purchase history, browsing behavior, engagement, location, preferences and predicted metrics such as churn risk or customer lifetime value. Those segments can then be used across email and SMS. www.klaviyo.com

For example, you could create:

• Customers who bought in the last 30 days
• Customers who haven't purchased in 6 months
• VIP/high-spend customers
• Customers who bought Product A but not Product B
• Customers in Cyprus
• Customers who opened the last 3 newsletters
• Customers who are SMS subscribers but not email subscribers
• Customers at high risk of churn

Then send different email and SMS campaigns to each group, rather than maintaining dozens of manually updated lists. Klaviyo specifically supports using similar segmentation logic across email and SMS. help.klaviyo.com

If you're an e-commerce business: also look very seriously at Omnisend

Omnisend is arguably the closest competitor I'd evaluate alongside Klaviyo. It is particularly attractive if your customer data comes from Shopify or another e-commerce platform.

It supports segments based on orders, products viewed, cart activity, purchase frequency, location, tags, email engagement and SMS engagement, with segments updating dynamically. Those segments can be used for both email and SMS campaigns and automations. www.omnisend.com

Its big advantage is that the product is designed around e-commerce marketing workflows rather than being a broader CRM.

Brevo: best if keeping costs down matters

Brevo is worth considering if you're a smaller business and don't need quite as sophisticated a customer-data engine. It supports dynamic segmentation based on attributes, demographics, purchase history and engagement, and those segments can be used for targeted campaigns. www.brevo.com

I'd choose Brevo when price/value and simplicity outweigh having the most sophisticated behavioral marketing platform.

HubSpot: best if this is also a sales CRM

If you're selling to businesses, have a sales team, or already use a CRM, HubSpot becomes much more compelling. Its active segments automatically update as contacts' properties and behavior change, and those segments can drive both marketing emails and SMS/workflows. knowledge.hubspot.com

One important caveat: HubSpot's current marketing SMS functionality has significant geographic requirements—its marketing SMS documentation says messages are currently sent using US-based numbers to +1 numbers—so I would not choose HubSpot for an international SMS program without first confirming your target countries are supported. knowledge.hubspot.com

What I'd choose

If I were selecting purely for this requirement:

1. 🥇 Klaviyo — best overall combination of segmentation + email + SMS + automation
2. 🥈 Omnisend — potentially better choice for an e-commerce business
3. 🥉 Brevo — best value/simple option
4. HubSpot — best if CRM/sales integration is equally important
5. Attentive — consider if SMS is the primary marketing channel

One important point: SMS consent needs to be managed separately from email consent. For example, Omnisend explicitly treats email and SMS subscriptions as separate opt-ins. support.omnisend.com

If you tell me (1) your approximate number of customers, (2) whether you're e-commerce/B2B/service, (3) the countries you're sending SMS to, and (4) your monthly email/SMS volume, I can narrow this down to the best 2–3 options and compare their likely costs and capabilities.

If your main requirement is newsletters + targeted SMS to the same segmented customer database, I’d shortlist these:

🥇 My recommendation: Klaviyo

Klaviyo is particularly strong if your goal is "send this newsletter/text only to customers who meet X criteria."

You can segment based on things like:

• Purchase history
• Products purchased or viewed
• Customer lifetime value
• Location
• Engagement with previous emails/SMS
• VIP status
• Likelihood of churning
• Recent vs. lapsed customers
• Email vs. SMS preference
• Custom customer attributes

Klaviyo's email and SMS segmentation can use essentially the same customer data, so you don't have to maintain separate audiences for the two channels. help.klaviyo.com

For example, you could create:

Segment A: Customers who bought in the last 30 days
→ Email newsletter about complementary products

Segment B: Customers who haven't purchased in 90 days
→ Email + targeted SMS win-back offer

Segment C: Top 10% by customer value
→ VIP email + exclusive SMS

Segment D: Customers who viewed Product X but didn't buy
→ Product-specific SMS

Klaviyo also supports dynamic segments that update as customer behavior changes, which is a major advantage for this use case. www.klaviyo.com

Klaviyo

🥈 Brevo — best if you want lower complexity/cost

Brevo is worth considering if you don't need Klaviyo's depth of behavioral/customer analytics.

It supports email campaigns, SMS, automations, and dynamic segmentation based on attributes, demographics, purchase history, and activity. www.brevo.com

Brevo

🥉 HubSpot — best if these are sales prospects as well as customers

HubSpot makes more sense if you want your marketing lists connected to a full CRM—sales pipeline, customer records, lead scoring, forms, website activity, etc.

For a business whose primary need is customer newsletters + promotional SMS, however, I'd generally choose Klaviyo over HubSpot.

HubSpot

What I'd choose

Ecommerce / consumer business: → Klaviyo

Small business wanting straightforward email + SMS: → Brevo

B2B / sales organization: → HubSpot

Online store specifically: → Klaviyo or Omnisend

One important caveat: for SMS, make sure the platform and your setup handle opt-in/consent, unsubscribe requests, and applicable U.S. texting regulations correctly. Klaviyo, for example, has specific SMS consent and segmentation functionality built around opted-in subscribers. help.klaviyo.com

If you tell me (1) roughly how many customers you have, (2) whether you're B2B or B2C, (3) what system currently holds your customer list, and (4) your approximate monthly budget, I can narrow this to the best 2–3 choices and compare actual pricing/features for your situation.

If your main requirement is one platform that can send newsletters + targeted SMS to dynamically segmented customer lists, my top choices are:

🥇 My default recommendation: Klaviyo

For most businesses that already have customer data and want to send different newsletters/texts to different customer groups, I'd pick Klaviyo.

Its segmentation can use essentially any combination of customer attributes and behavior, including purchase history, website activity, engagement, location, preferences and predictive metrics. Segments update in real time, and the same audience logic can be used across email and SMS. www.klaviyo.com

For example, you could create:

• VIP customers — spent >$500
• Recent customers — purchased within 30 days
• Lapsed customers — purchased 6+ months ago
• Product-interest segment — viewed a particular product/category
• Highly engaged email subscribers
• Highly engaged SMS subscribers
• Customers who prefer SMS
• Customers in a particular geographic area
• Customers who bought X but haven't bought Y

Then send a newsletter to one segment and a completely different SMS campaign to another. Klaviyo specifically supports behavioral SMS segmentation and recommends segments such as highly engaged subscribers, VIPs, high-intent shoppers and location/language-based groups. help.klaviyo.com

💰 If cost/ease of use matters most: Brevo

Brevo is worth a serious look if you're a smaller organization and don't need Klaviyo's depth.

It supports dynamic segments based on demographics, purchase history and engagement, and those segments can be reused for targeted email campaigns and automations. www.brevo.com

It's particularly attractive if you want email + SMS without building a very sophisticated marketing stack.

📱 If SMS is a major part of the strategy: Attentive

Attentive is particularly compelling for consumer brands where SMS is a primary acquisition and revenue channel. It combines SMS and email with shared customer profiles and behavioral segmentation, and supports journeys across SMS, email, RCS and push. www.attentive.com

I'd lean toward Attentive over Klaviyo if SMS is as important as—or more important than—email and you're at enough scale to justify a more enterprise-oriented platform.

🧠 If your targeting is extremely behavioral: Customer.io

Customer.io is excellent when your segmentation is driven by what customers actually do, rather than simply what's in a CRM.

For example:

"Send an email to users who signed up 14–30 days ago, used feature X twice, haven't used feature Y, and clicked our last campaign."

Customer.io supports real-time data-driven segments that automatically add/remove people as they meet or stop meeting conditions, and those segments can drive campaigns and automations. docs.customer.io

I'd favor it for SaaS, apps, memberships, marketplaces and other behavior-heavy businesses.

My ranking

If I were choosing today:

1. Klaviyo — best overall combination of segmentation + email + SMS
2. Brevo — best if keeping costs and complexity down
3. Attentive — best for sophisticated SMS/e-commerce marketing
4. Customer.io — best for complex behavioral/customer journeys
5. HubSpot — best when you also need a serious CRM/sales platform

One important distinction: don't choose based simply on "number of contacts." For your use case, I'd compare SMS pricing, email volume, segmentation depth, automation, integrations with your customer database/CRM, and how easily you can prevent the same customer from getting overlapping email + SMS campaigns.

If you tell me (1) roughly how many customers/contacts you have, (2) whether you're B2B or B2C, (3) what system currently holds your customer lists, and (4) roughly how many emails/SMS messages you send per month, I can narrow this down to the best 2–3 options and estimate which will be cheapest.

If your core requirement is newsletters + targeted SMS to segmented customer lists, I’d narrow the field to Klaviyo, HubSpot, Brevo, and Attentive. The best choice depends heavily on whether you’re e-commerce, B2B, or a more traditional customer database.

My shortlist

1. Klaviyo — my default recommendation

If you're selling products or services directly to consumers, Klaviyo is probably where I'd start.

It lets you build segments from essentially any customer data, with real-time updating, and coordinate email, SMS and other channels from the same customer profile. It also supports predictive segments such as churn risk, customer lifetime value and next-purchase predictions. www.klaviyo.com

It's particularly strong for things like:

• Newsletter → all customers
• VIP customer → special offer
• Customers who bought X → cross-sell campaign
• Customers who haven't purchased in 90 days → win-back
• Email non-openers → SMS follow-up
• Recent purchasers → suppress from promotional campaign
• Abandoned cart → email + SMS sequence

Best fit: Shopify/e-commerce, retail, restaurants, consumer services, memberships, DTC.

2. HubSpot — best if you need a real CRM

I'd choose HubSpot if your "customer list" is really a CRM database of prospects, leads, customers, companies, sales opportunities, etc.

Its segmentation can use contact properties, behavior and lifecycle stage, and those segments can be activated across marketing channels. HubSpot also supports sending email campaigns directly to specific segments or through automated workflows. www.klaviyo.comwww.hubspot.comwww.hubspot.com

The big advantage is that marketing is tied closely to the CRM. For example:

"Send this newsletter to customers in Illinois who purchased in the last 12 months but haven't purchased this year."

That's a natural HubSpot use case.

Best fit: B2B, professional services, franchises, organizations with sales teams, companies already using HubSpot CRM.

One caveat: SMS isn't as natively central to HubSpot as it is to Klaviyo/Attentive, and some SMS workflows may involve integrations. www.hubspot.com

3. Brevo — best budget-conscious option

Brevo is worth considering if you want something relatively straightforward without building a highly sophisticated marketing stack.

I'd put it ahead of Klaviyo if your priority is:

"I have a customer database, I want to segment it, send nice newsletters, send texts, and not spend a fortune."

It's particularly attractive for smaller organizations that don't need the depth of an enterprise CDP/marketing automation system.

4. Attentive — best if SMS is a major revenue channel

Attentive is particularly strong when SMS is as important—or more important—than email.

It's designed around sophisticated identity resolution, SMS, email, personalization and cross-channel marketing, and is particularly oriented toward consumer brands with substantial messaging programs. www.attentive.com

I'd look at Attentive when you have a large SMS subscriber base and meaningful SMS revenue, rather than simply wanting to add texting to a newsletter program.

5. Braze — enterprise choice

Braze is excellent if you're talking about thousands/millions of customers and complex journeys involving email + SMS + push + in-app + web, with sophisticated behavioral orchestration.

For a typical small or midsize business, though, I'd consider it overkill.

What I'd choose

If you're an e-commerce/B2C business:
🥇 Klaviyo

If you're a B2B company and your customer data lives in a CRM:
🥇 HubSpot

If you're a small business primarily looking for affordable email + SMS:
🥇 Brevo

If SMS is one of your most important marketing/revenue channels:
🥇 Attentive

If you're a large enterprise with sophisticated omnichannel journeys:
🥇 Braze

The biggest thing I'd evaluate isn't actually the newsletter editor. It's how easily you can create and maintain segments from your existing customer data and then use those same segments across email and SMS. Klaviyo, for example, explicitly supports real-time segmentation and cross-channel activation. www.klaviyo.com

If you tell me (1) roughly how many customers/contacts you have, (2) whether you're B2B or B2C, (3) what system currently holds your customer data, and (4) whether SMS is occasional or a major channel, I can give you a much more specific top 2–3 recommendation and estimated cost comparison.

If your priority is one platform for newsletters + targeted SMS + customer segmentation, I’d shortlist these:

1. Klaviyo — best overall

Klaviyo is probably the strongest fit if you’re a B2C/e-commerce business and want sophisticated targeting. It lets you build dynamic segments from purchases, browsing, engagement, location, preferences, and other customer data, then use those same segments across email and SMS. www.klaviyo.com

Best for:

• Highly targeted newsletters
• Promotional and transactional-ish SMS workflows
• Customer lifecycle automation
• E-commerce/customer purchase data
• VIP, repeat-buyer, churn-risk and high-intent segments

My pick if: you want marketing automation to become a serious part of your growth strategy.

2. ActiveCampaign — best for automation

ActiveCampaign is particularly good if your segmentation needs to drive complex automated journeys. Its segments can use demographics, tags, website activity, campaign engagement and other contact behaviors; SMS-specific segmentation is also available with its SMS add-on. help.activecampaign.com

Best for:

• Complex customer journeys
• Lead nurturing
• B2B and B2C
• Sales + marketing automation
• Detailed behavioral segmentation

3. HubSpot — best if you want a CRM included

HubSpot makes more sense when newsletters and SMS are just part of a broader CRM/sales/customer-management system. Its SMS product uses CRM data to personalize messages and supports workflows for consent and compliance. www.hubspot.com

Best for:

• Sales teams
• B2B companies
• Managing leads and customers alongside marketing
• Email + SMS + CRM + sales automation in one ecosystem

My ranking

For your specific description, I'd start with Klaviyo. Its segmentation is particularly well suited to doing things like:

“Send this newsletter to customers who bought in the last 90 days but haven't purchased this product, and send the SMS version only to customers who have opted into SMS and regularly engage with texts.”

Klaviyo explicitly supports using customer behavior and profile data to create dynamic segments across both email and SMS. help.klaviyo.com

If you tell me roughly how many contacts you have, whether you're B2B or B2C, and what system currently holds your customer list (Shopify, Salesforce, Excel, etc.), I can narrow this down to the best 2–3 options and compare pricing, SMS costs, segmentation, automation, and ease of use.

If your main requirement is email newsletters + targeted SMS to the same segmented customer database, I’d narrow the field to these:

1. Klaviyo — my top pick

For your specific use case, Klaviyo is probably the strongest choice. It was built around customer data and behavioral segmentation rather than simply sending newsletters.

You can create segments based on things like:

• Purchase history
• Products viewed
• Amount spent / customer value
• Last purchase
• Email engagement
• SMS engagement
• Location
• Customer preferences
• Churn risk and predicted lifetime value

Those segments can then be used across email and SMS, and Klaviyo's segments update dynamically as customer behavior changes. www.klaviyo.com

For example, you could have:

VIP customers → monthly email + occasional VIP SMS
Bought product A but not B → cross-sell email
No purchase in 90 days → win-back email
Viewed product recently + SMS opted-in → targeted text
Prefers SMS → prioritize text over email

That's exactly the sort of use case Klaviyo handles well. help.klaviyo.com

2. Brevo — best if you want simpler/cheaper

Brevo is a very good alternative if you don't need Klaviyo's depth.

It supports email and SMS campaigns and lets you build segments based on attributes, demographics, purchase history, engagement and behavior. help.brevo.com

I'd choose Brevo when cost and simplicity matter more than extremely sophisticated customer analytics.

3. Mailchimp — best for newsletter-first businesses

Mailchimp remains a strong choice if your business is primarily email newsletters, with SMS as an additional channel.

Its segmentation can be used for both email and SMS, including behavioral and audience-based criteria. mailchimp.com

I'd put it behind Klaviyo for a business where targeted SMS is going to be a major part of the marketing strategy.

4. HubSpot — best for CRM-heavy organizations

If you also need sales CRM, lead management, customer service, pipelines, forms, website tracking, etc., HubSpot becomes more compelling.

It's less of a pure "email/SMS marketing engine" than Klaviyo, but potentially much better if marketing is part of a broader CRM operation.

My recommendation

If you're an e-commerce or consumer business:
→ Klaviyo

If you're a small business wanting inexpensive, relatively simple email + SMS:
→ Brevo

If newsletters are the primary need and SMS is secondary:
→ Mailchimp

If you need CRM + sales + marketing in one system:
→ HubSpot

The biggest differentiator is how sophisticated your segmentation needs to be. Klaviyo is particularly strong when you want one customer profile driving both email and SMS campaigns, with segments automatically changing based on customer behavior. help.klaviyo.com

If you tell me roughly how many customers/contacts you have, whether you're e-commerce or B2B, and how many SMS messages you expect to send per month, I can narrow this down to the best 2–3 options and compare their current pricing.

The best platform depends heavily on whether your customer segmentation is based on purchases, website behavior, CRM data, or simple contact tags. For most businesses wanting newsletters + targeted SMS to segmented lists, these are the strongest options: worldmetrics.org

My picks by scenario

If you run an online store (Shopify/WooCommerce):

1. Klaviyo
2. Omnisend
3. Attentive (if SMS is a major revenue channel)

www.techradar.comsoftwareinspect.com

If you are a service business, membership organization, or B2B company:

1. ActiveCampaign
2. HubSpot
3. Brevo

If you mainly send newsletters and occasional texts:

1. Mailchimp
2. Brevo
3. ActiveCampaign

Features I would prioritize

For targeted messaging, look for:

• Dynamic segments (e.g., “customers who bought in last 90 days but haven’t returned”)
• Behavior triggers (website visits, purchases, abandoned carts, inactivity)
• Unified email + SMS profiles (one customer record, not separate lists)
• Consent management for SMS compliance
• A/B testing and revenue attribution
• Integrations with your CRM, ecommerce platform, or POS

If you tell me your business type (ecommerce, nonprofit, SaaS, local business, B2B, etc.), approximate list size, and whether SMS is promotional or transactional, I can narrow this to the top 2–3 choices.

If your main requirement is email newsletters + targeted SMS to the same segmented customer database, I’d shortlist these:

1. 🥇 Klaviyo — my first choice

Klaviyo

Klaviyo is particularly strong if you want behavior-based targeting, rather than just maintaining separate lists. You can segment customers by purchases, browsing behavior, engagement, location, preferences, predicted customer lifetime value, churn risk, etc., and use those segments across both email and SMS. Segments update dynamically as customer data changes. www.klaviyo.com

For example:

• Customers who bought Product A but not Product B → email cross-sell
• Customers who spent $500+ → VIP SMS
• Customers who haven't purchased in 90 days → reactivation campaign
• Customers who browse but don't purchase → targeted SMS
• Customers who prefer SMS → send important promotions by text rather than email
• Customers in a particular geographic area → location-specific campaign

Klaviyo also has particularly good SMS-specific segmentation and can combine email/SMS engagement into the same customer profile. help.klaviyo.com

Best if: you have meaningful customer/order data and want sophisticated automation.

2. 🥈 Omnisend — excellent alternative

Omnisend

I'd look seriously at Omnisend if you want something easier and potentially more economical than Klaviyo.

It supports dynamic segmentation based on customer attributes, purchase behavior, order value, product views, engagement, lifecycle stage and custom events. The same segments can be used for email, SMS and push notifications. support.omnisend.com

One nice feature is that you can include or exclude segments from campaigns, so you can do things like:

Send this promotion to all customers who bought in the last 6 months, but exclude anyone who bought Product X in the last 30 days.

Omnisend also has an AI segment builder. support.omnisend.com

Best if: you're an e-commerce business and want powerful segmentation without as much complexity.

3. HubSpot — best if this is really a CRM problem

HubSpot

I'd choose HubSpot if your customer segmentation needs to connect closely to sales pipelines, leads, customer service, deals and CRM records, rather than primarily e-commerce transactions.

It's especially attractive for B2B companies where you might want:

Lead source → industry → company size → sales stage → customer status → email/SMS campaign

rather than simply:

Product purchased → product viewed → abandoned cart → repeat purchase

4. Mailchimp — best for straightforward newsletters

Mailchimp

Mailchimp remains a reasonable choice if your primary job is sending newsletters and you only need relatively straightforward SMS campaigns and segmentation.

I wouldn't make it my first choice if targeted SMS + sophisticated behavioral segmentation is a major part of your strategy. That's where Klaviyo and Omnisend are stronger.

My recommendation

I'd narrow it down like this:

E-commerce + serious segmentation → Klaviyo

E-commerce + want easier/less expensive → Omnisend

B2B + CRM/sales-driven → HubSpot

Mostly newsletters + basic marketing → Mailchimp

If you tell me roughly (1) number of contacts, (2) whether you're B2B or B2C/e-commerce, (3) Shopify/WordPress/another CRM, and (4) approximate number of SMS messages per month, I can compare the actual current pricing and total monthly cost of the top 2–3 options for your situation.

If your priority is newsletters + targeted SMS + strong customer segmentation in one system, I’d shortlist these:

1. Klaviyo — my #1 choice

Klaviyo is particularly strong if you want to say things like:

• "Email customers who bought Product A but haven't bought Product B."
• "Text customers in Missouri who purchased in the last 90 days."
• "Send this newsletter only to highly engaged customers."
• "Give VIP customers a different offer."
• "Don't SMS people who haven't engaged recently."

Its segmentation can combine purchase history, browsing behavior, demographics, engagement, preferences, and predictive attributes such as churn risk and predicted customer lifetime value. Segments update dynamically, and the same customer data can drive both email and SMS. www.klaviyo.com

Best if: customer behavior and personalization are important to your marketing strategy.

2. Omnisend — excellent alternative

I'd seriously consider Omnisend if you want something simpler and potentially more economical than Klaviyo, particularly for e-commerce.

It supports dynamic segments based on customer data, purchase behavior, engagement, demographics, etc., and those segments can be used across email, SMS and push campaigns and automations. support.omnisend.com

A particularly nice feature is that email and SMS subscriptions are treated separately, so you can distinguish someone who has opted into SMS but not email. support.omnisend.com

Best if: you're selling products online and want powerful marketing without as much complexity.

3. Brevo — best budget-oriented option

Brevo gives you sophisticated segmentation based on behavior, preferences and engagement, while supporting email and SMS campaigns. help.brevo.com

I'd look at it if your list is relatively large but your marketing automation requirements aren't as sophisticated as a Klaviyo setup.

Best if: keeping software costs under control is a major consideration.

4. HubSpot — best if you also need a CRM

HubSpot becomes more compelling if your "customer list" is really a sales/CRM database and you want marketing, sales pipelines, customer records and automation connected together.

For a pure newsletter + targeted SMS use case, though, I'd generally start with Klaviyo or Omnisend rather than paying for HubSpot's broader ecosystem.

My recommendation

If I were choosing today:

• E-commerce / B2C: Klaviyo
• E-commerce + simpler/cheaper: Omnisend
• Large audience + budget conscious: Brevo
• B2B / sales team / CRM-heavy: HubSpot

The biggest differentiator isn't the newsletter editor—it's the customer data and segmentation engine behind it. For example, Klaviyo specifically supports segments such as VIPs, high-intent shoppers, customers who prefer SMS, location-based audiences, engagement tiers, churn-risk customers and cross-sell audiences. www.klaviyo.comhelp.klaviyo.com

If you tell me roughly (1) number of customers/contacts, (2) whether you're B2B or B2C, (3) whether you sell online, and (4) your approximate monthly budget, I can narrow this down to the best 1–2 options and compare their current pricing/features.