7 Best Customer Segmentation Software Tools in 2026

Segmentation is where most marketing personalization starts and where much of it goes wrong: segments built once, exported as CSV files, and left to go stale while customers change. The tools below all solve the first part. The differences are in what data they can segment on, how fresh the segments stay, and whether you can use them in a campaign without another tool. For tactics once you have the software, see our guide to dynamic segmentation tactics.

Three kinds of segmentation tools

• Analytics-first: product analytics tools that build behavioral cohorts for analysis and can share them (Amplitude, Mixpanel).
• Data platforms: CDPs that unify customer data and send audiences to many destinations (Twilio Segment). Our customer data platform comparison covers this group in depth.
• Activation-first: marketing platforms where the segment and the campaign live together (Klaviyo, HubSpot, Optimove), plus agent layers such as Questera that build and update segments for you.

How we picked these tools

Each tool had to let marketers build segments from behavioral or profile data, keep those segments updated or refreshable, be sold to new customers in October 2026, and document its plans on its own site. We read every plan and price on the vendor's own pricing page or help center in October 2026. We did not run paid trials, and we left out vendor performance claims we could not check.

At-a-glance comparison

The best customer segmentation software

1. Amplitude: behavioral cohorts for product teams

Amplitude segments users by what they do in your product. Its plans are priced on events: the free plan covers 2 million events a month without behavioral cohorts, Plus adds 20 behavioral cohorts with the first 2 million events free, and Growth and Enterprise include unlimited behavioral cohorts.

Pricing (as of October 2026): Free; Plus from $0 with usage-based pricing above 2 million events; Growth and Enterprise custom. Strengths: deep behavioral analysis, so segments rest on real product usage. Limits: cohorts are built for analysis; acting on them in campaigns usually needs an integration.

2. Mixpanel: generous free analytics with saved cohorts

Mixpanel also segments on events and user properties. Its free plan covers up to 1 million events a month with limited behavioral cohorts, and Growth includes unlimited saved cohorts, metrics and reports.

Pricing (as of October 2026): Free; Growth from $0 with the first 1 million events free and up to 20 million events a month; Enterprise by conversation. Strengths: a low-cost way to segment by behavior. Limits: like Amplitude, it is an analytics tool first.

3. Twilio Segment: build the audience once, send it everywhere

Twilio Segment collects and unifies customer data and sends it to the tools you use. Its pricing is based on monthly tracked users, starting with a free trial and moving to Business-tier and Customer Data Platform plans with custom volume pricing; AI predictions and recommendations are included in the Customer Data Platform plan and are add-ons on the pipeline plan.

Pricing (as of October 2026): free trial, then custom volume pricing. Strengths: one definition of a segment used by every destination. Limits: it needs engineering to instrument; if you are weighing other options, our Segment alternatives page compares them.

4. Klaviyo: segments that drive ecommerce campaigns

Klaviyo segments shoppers on store activity, email and SMS engagement and site behavior, and uses those segments directly in campaigns and flows. Its Composer AI can build the audience for a campaign from a stated goal.

Pricing (as of October 2026): free for up to 250 active profiles; paid plans priced by active profiles. Strengths: segments and sends in one place for online stores. Limits: built around ecommerce data.

5. HubSpot: active and static segments on your CRM

HubSpot segments (previously called lists) group records by property values and other characteristics. Active segments update their members automatically as records meet or stop meeting the criteria; static segments are fixed when saved. Each segment can use up to 250 filters, including up to 60 associated object filters.

Pricing (as of October 2026): segments are available on all products and plans. Marketing Hub Starter lists at $20 per seat a month and Professional starts at $800 a month. Strengths: CRM and marketing share one record. Limits: product usage data needs to be brought in from another tool.

6. Optimove: AI-discovered segments for enterprise B2C

Optimove calls itself a Positionless Marketing Platform. Its data capabilities let marketers discover customer insights and segments for targeting without engineering help, and Optimove AI handles decisioning for multichannel journey orchestration.

Pricing (as of October 2026): not published; Optimove sells through demos. Strengths: marketer-owned segmentation and decisioning at scale. Limits: an enterprise platform with an enterprise buying process.

7. Questera: an agent that keeps segments current

Questera, which publishes this blog, offers SEGA, a segmentation agent that creates user segments by activity, demographics and behavior, updates them automatically as user data changes, and adds or removes users in real time. It works with data from the tools you connect, and Questera lists more than 75 integrations, including Mixpanel, Amplitude, Braze and Salesforce.

Pricing (as of October 2026): the agent platform is sold through a demo. Strengths: segments stay current without someone rebuilding them, and can feed the channels you already use. Limits: it depends on the data sources you connect, so it does not replace analytics or a CDP.

How to choose

Start from the decision the segment has to drive. If the question is "which users are at risk?", analytics tools find the pattern; if the question is "who gets this campaign today?", the segment needs to live where the campaign runs. Many teams end up with one of each, joined by a CDP or an agent layer. Segments are also only as good as the value they target, so pair this list with our roundup of customer lifetime value tools, and use our guide to customer journey mapping tools to decide what each segment should experience next.

Frequently Asked Questions

What is customer segmentation software?
It is software that groups customers by what they do, who they are and what they are worth, so marketing can treat each group differently. Some tools build segments for analysis (Amplitude, Mixpanel), some build them for activation in campaigns (Klaviyo, HubSpot, Optimove), and some sit in between and send segments to other tools (Twilio Segment, Questera).

Is there free customer segmentation software?
Yes, with limits. As of October 2026 Amplitude's free plan covers 2 million events a month, Mixpanel's free plan covers up to 1 million events a month, Klaviyo's free plan covers up to 250 active profiles, and HubSpot's segments (previously called lists) are available on all products and plans, including free tools.

What is the difference between static and dynamic segments?
A static segment is a snapshot: it includes the people who matched the rules when you saved it. A dynamic (active) segment updates on its own as people start or stop matching the rules. HubSpot calls these static and active segments, and most lifecycle campaigns should run on dynamic ones.

Which segmentation tool is best for SaaS products?
Product analytics tools such as Amplitude and Mixpanel are the usual starting point for SaaS, because they segment by in-product behavior. To act on those segments in email or ads, pair them with an activation layer such as HubSpot, a CDP such as Twilio Segment, or an agent such as Questera's SEGA.