# Best Conversion Rate Optimization Tools to Buy in 2026

> 15 conversion rate optimization tools grouped by job to be done, every price checked on the vendor's own page in September 2026, and which to buy first.

- URL: https://missiongrowth.io/blog/conversion-rate-optimization-tools
- Published: 2026-07-23 · Updated: 2026-09-24
- Author: Ömer Furkan Aktaş, Founder, Mission Growth
- Publisher: Mission Growth. Company facts: https://missiongrowth.io/llms.txt

Fifteen conversion rate optimization tools show up across nearly every roundup for this query, and almost none of them compete with each other directly. They split five different jobs: analytics and funnels, session replay, A/B testing, user feedback, and personalization. The best CRO tools for a given team come from matching the job that needs solving first and the site's traffic level, ahead of any feature checklist.

Several of the prices and product claims still floating around for this kind of conversion rate optimization software no longer match what the vendors' own pages say today. VWO and Optimizely have both stopped publishing a number at all. Mutiny has pivoted away from CRO entirely, and Google has never published a public price for Analytics 360.

Every fact below was checked on the vendor's own page in September 2026, and every stale claim gets called out where it still shows up elsewhere.

This guide picks up where the discipline itself leaves off: it assumes you already know what conversion rate optimization is, and it exists to answer a narrower question. Which category should you fund first, and which vendor in that category is worth a sales call?

## The 15 conversion rate optimization tools at a glance

The table below sorts all fifteen by the job each one solves, not by name, so the overlap between them disappears at a glance. The comparison table below is the fastest way to see which of the 15 CRO tools publish a real price and which ones make you talk to sales first.

::dataset{key="cro-tools-comparison-2026" name="Conversion rate optimization tools compared by category and verified price, September 2026"}

| Tool | Category | Free tier | Entry paid price | Top tier / differentiator |
|---|---|---|---|---|
| Google Analytics 4 | Analytics | Free for all standard users | No paid GA4 tier exists | Analytics 360 is a separate product with no published price |
| Heap (Contentsquare) | Analytics | Up to 10,000 monthly sessions | No public price | Growth, Pro, and Premier are all custom-quote |
| Unbounce | Funnel builder | 14-day trial, no credit card | $29/month ($22/month billed annually) | Optimize $249/month ($187/month annually) adds AI-driven traffic routing |
| Perspective | Funnel builder | No free tier | $59/month, $47/month billed annually | Scale tier €969/month, billed annually |
| WhatConverts | Lead tracking | No free tier | $30/month, includes $30 of free usage credit | Agency plans from $500/month for unlimited accounts |
| Hotjar (Contentsquare Experience Analytics) | Session replay | Free: $0/month, 200,000 sessions | $49/month (Growth, 7,000 sessions) | Sold under Contentsquare; demo links route to the parent brand's own site |
| Microsoft Clarity | Session replay | 100% free, no traffic limit | No paid tier exists | Nothing to upgrade to |
| Crazy Egg | Session replay | 30-day trial, not an ongoing free plan | $29/month (Starter) | Enterprise tier $599/month |
| Mouseflow | Session replay | €0/month | €39/month billed monthly, €25/month billed annually (Essential) | Advanced tier €149/month billed monthly, €109/month annually |
| FullStory | Session replay | 30,000 sessions/month, 12-month retention | No public price | Business, Advanced, and Enterprise are all demo-only |
| VWO (Wingify) | A/B testing | No free tier | No public price | Fully custom, priced on monthly active users |
| Optimizely | A/B testing | No free tier | No public price | Every plan is "individually packaged" |
| Convert.com | A/B testing | 15-day trial, no credit card | $399/month (Growth, monthly billing; $299/month billed annually) | Pro from $599/month ($420/month annually); Enterprise custom above 1M tested visitors/month |
| Kameleoon | A/B testing | 30-day trial, capped at 3 experiments | $495/month (PBX Starter, up to 10 experiments) | Enterprise tier is custom |
| Lyssna | Surveys and user testing | $0/month, 3 seats, 15 self-recruited responses | $199/month (Growth, monthly); $166/month billed annually | Unlimited self-recruited responses, AI summaries |

Every price above came from the vendor's own page, checked in September 2026.

The middle of these eight prices is $54 a month.

Sorted by monthly entry price, the eight are Crazy Egg ($29), Unbounce ($29), WhatConverts ($30), Hotjar ($49), Perspective ($59), Lyssna ($199), Convert.com ($399) and Kameleoon ($495). With an even count, the median is the midpoint of Hotjar and Perspective.

::figure{src="/blog/figures/conversion-rate-optimization-tools-1.svg" alt="Conversion rate optimization tools ranked by monthly entry price from Crazy Egg's $29 to Kameleoon's $495, with a $54 median between Hotjar and Perspective." caption="With eight tools priced, the median entry price is $54, the midpoint between Hotjar's $49 and Perspective's $59." width="720" height="422"}

Mouseflow's Essential plan doesn't factor into that sort. Its own page never quotes a USD price, only euros, so it can't sit in the same list without converting a currency the vendor itself never states.

## Which category to buy first, by traffic level

Under 10,000 monthly sessions, every category in this list still has a genuinely free option; above that, the free ceiling that decides the next purchase shifts tool by tool. Traffic level, not budget or preference, decides which category to fund first.

| Monthly sessions | Buy first | Why |
|---|---|---|
| Under 10,000 | Any free tool that answers your biggest question | Heap's 10,000-session cap is the tightest free ceiling here; Hotjar/Contentsquare (200,000 sessions) and Clarity (no cap) go much further |
| 10,000-30,000 | A paid tier only if the job is Heap's event-based analytics | Heatmap and replay tools, Hotjar, Clarity, and FullStory, are all still free at this level |
| 30,000-200,000 | An A/B testing platform, while heatmap and replay stay free | FullStory's 30,000-session free cap is behind you, but Hotjar and Clarity keep going; Kameleoon (50,000) and Convert.com (100,000) cap tested visitors on their paid testing plans, not site traffic |
| Above 200,000 | A paid session-replay tier | Hotjar/Contentsquare's own free tier, the most generous one in this list, is finally behind you too |

::figure{src="/blog/figures/conversion-rate-optimization-tools-2.svg" alt="Free-tier monthly session caps for three session-replay and heatmap tools: Hotjar/Contentsquare at 200,000, FullStory at 30,000, and Clarity uncapped." caption="Hotjar/Contentsquare's free tier alone covers 200,000 monthly sessions, more than six times FullStory's 30,000-session cap." width="720" height="261"}

Ordering the buy this way is [the same math used to calculate SEO ROI](https://missiongrowth.io/blog/seo-roi): match the spend to the volume that can actually justify it, and skip the category that traffic can't yet support.

A worked example makes this concrete. A site running 30,000 sessions a month stays entirely free on Hotjar/Contentsquare, whose free tier reaches 200,000 sessions, and on Microsoft Clarity, which has no cap at all.

That same traffic sits right at FullStory's 30,000-session free-tier ceiling, worth watching, and it has already outgrown Heap's 10,000-session free-analytics cap three times over, the most likely place in this range for a bill to start.

A team running [b2b seo campaigns built to drive demos](https://missiongrowth.io/blog/b2b-seo) rather than raw traffic often sits well under that 10,000-session floor long after the funnel itself is working. The next section is where analytics and funnel tools pick that traffic apart.

## Analytics and funnel tools

Google Analytics 4 answers how many people converted, Heap and WhatConverts answer on which step and from which lead source, and Unbounce and Perspective build the funnel itself. Splitting those two jobs, measuring the funnel and building it, is where most "analytics" comparisons get muddled.

**Google Analytics 4** is free for every standard user, with no paid GA4 tier of its own.

**Best for:** any site that needs baseline conversion tracking at zero cost.

**Price:** free.

Google's own Analytics page lists no price at all for Analytics 360, the enterprise tier beyond GA4; it points buyers to "Learn more" and a sales conversation instead. One buying-guide roundup states Analytics 360 "starts at $150,000 annually." Google's own page shows no such figure, or any figure, anywhere.

Conversion rate is [one of the core SEO KPIs](https://missiongrowth.io/blog/seo-kpis) GA4 exists to track, since traffic without a rising conversion rate never turns into revenue.

**Heap**, now part of Contentsquare, gives up to 10,000 monthly sessions free.

**Best for:** teams that want event-level detail without touching Heap's paid tiers yet.

**Price:** no public number for Growth, Pro, or Premier; install the free snippet to get an estimate.

**Unbounce** builds landing pages and funnels rather than just measuring them, with a 14-day trial and no credit card required.

**Best for:** teams that need to ship and test new landing pages fast.

**Price:** $29/month ($22/month billed annually) for Starter; the Optimize tier at $249/month ($187/month annually) adds AI-driven traffic routing.

**Perspective** bundles a CRM and message automation into its funnel builder, a shape none of the other four tools in this section share.

**Best for:** teams that want lead capture and follow-up messaging in the same product as the funnel.

**Price:** $59/month billed monthly, $47/month billed annually.

**WhatConverts** tracks phone-call and form-lead source and value instead of on-page behavior, a different measurement than GA4 or Heap rather than a competitor to either.

**Best for:** teams whose conversions close on the phone as often as on a form.

**Price:** $30/month for a single account, including $30 of free usage credit; agency plans with unlimited accounts start from $500/month.

GA4 shows how many people converted. Heap and WhatConverts each show where [a SaaS SEO funnel](https://missiongrowth.io/blog/saas-seo) actually loses them between the first click and a completed signup, from different angles.

## Session replay and heatmap tools

Hotjar now ships under Contentsquare as Experience Analytics, and its entry paid tier has moved since older roundups were written. Session replay tools all watch the same behavior, where visitors click, scroll, and rage-click, but they differ sharply on what's free and what isn't.

**Hotjar**, sold under Contentsquare as Experience Analytics, now ships a free tier of its own: $0/month for up to 200,000 monthly sessions.

**Best for:** teams that already run on Contentsquare and want replay data in the same login.

**Price:** $49/month for Growth, covering 7,000 monthly sessions.

Hotjar's Growth plan costs $49/month for those 7,000 sessions as of September 2026. One roundup, under its own self-dated "Quick Comparison and Pricing (June 2026)" header, states "paid plans from roughly $39/month on annual billing" for the same plan.

That's what each page shows on its own date. Treat the gap as a reason to check the current number yourself before buying, since there's no independent way to verify which figure is current.

**Microsoft Clarity** is 100% free with no traffic limit and no paid tier to upgrade to.

**Best for:** a team that wants one of the free CRO tools in this list, with no usage cap at all.

**Price:** free, permanently.

**Crazy Egg** offers a 30-day trial rather than an ongoing free plan.

**Best for:** teams that want heatmaps and a fixed 30-day evaluation window.

**Price:** $29/month for Starter; Enterprise runs $599/month.

**Mouseflow** publishes every price in euros, with no USD-denominated offer anywhere on its page.

**Best for:** European teams that want a no-cost plan before committing to a paid one.

**Price:** €0/month at no cost; Essential runs €39/month billed monthly or €25/month billed annually.

**FullStory** gives 30,000 sessions with no charge, plus 12 months of data retention.

**Best for:** teams with enough traffic to want a real ceiling before paying anything.

**Price:** no public number for Business, Advanced, or Enterprise; all three require a demo.

Pick Clarity unless a specific paid feature, surveys, longer retention, or dead-click AI tagging, is worth paying for on top of it.

Hotjar/Contentsquare's 200,000-session free-tier cap and FullStory's 30,000-session cap are the only numeric ceilings among these five tools. Crazy Egg skips a persistent no-cost tier entirely (its 30 days is a trial, not a plan), Mouseflow's no-cost tier carries no published session number at all, and Clarity's tier carries no cap because there's nothing above it to sell.

## A/B testing and experimentation platforms

VWO and Optimizely have both retired public pricing entirely, so a "starting at $X" figure for either one is already out of date the moment someone writes it down. Session replay tools help you find where visitors drop off; this category is for testing whether a fix actually moves the number.

**VWO**, built by Wingify, shows no numeric price anywhere on its pricing page.

**Best for:** teams big enough to negotiate a custom monthly-active-user rate directly.

**Price:** fully custom, based on monthly active users.

VWO's own pricing page, checked in September 2026, shows no free plan and no numeric price of any kind: every rate is calculated from a site's own monthly active users. One roundup instead states, "Free plan offered Paid plans starts at $393/month," for the same product; the vendor's own page confirms neither claim today.

A rate that scales with a customer's traffic cannot also be a flat number quoted on a page for everyone to read.

**Optimizely** packages every plan individually with no number disclosed.

**Best for:** enterprise teams already budgeting for a sales conversation rather than a sticker price.

**Price:** custom, "individually packaged" per Optimizely's own page.

Optimizely's page states plainly that every plan is individually packaged, with nothing resembling a rate card anywhere on it. One roundup instead states, "Custom enterprise pricing starting around $50,000 annually." That number treats the outcome of a private sales negotiation as a fixed sticker price.

Optimizely's own page nowhere confirms that figure, or any figure, for any plan.

**Convert.com** positions itself around privacy-first tracking and dual statistics engines.

**Best for:** a team that wants a privacy-first testing tool with a published starting price instead of a sales call.

**Price:** $399/month for Growth (100,000 monthly tested users), $299/month if billed annually; Pro runs $599/month ($420/month annually); Enterprise is custom above 1M tested visitors a month.

**Kameleoon** and Convert.com are the only two tools in this category that publish a real number instead of routing every visitor to a sales call.

**Best for:** mid-size teams that want a fixed starting price instead of a sales call.

**Price:** $495/month for PBX Starter, which caps out at 10 experiments and 50,000 monthly tested visitors; the 30-day trial allows only 3 experiments.

Budget for a sales conversation in this category, except Kameleoon and Convert.com, which both hand you a real number up front.

## Surveys, feedback, and user-testing tools

Lyssna answers why a visitor didn't convert by asking them directly, something no heatmap or session recording tool can do. Replays and heatmaps show where people drop off; they can't explain the reasoning behind it.

**Lyssna** gives $0/month, 3 seats, and 15 self-recruited responses on its no-cost tier.

**Best for:** teams that need direct visitor feedback rather than another behavior recording.

**Price:** $199/month for Growth billed monthly, or $166/month if billed annually, with unlimited self-recruited responses and AI-generated summaries.

Add a testing tool once replays and heatmaps consistently show where visitors drop off but the team still can't explain why after three test iterations. That's the point where watching behavior stops being enough and asking becomes worth the extra line item.

## Personalization tools: what happened to the category

Mutiny, once a common personalization pick, is no longer a website personalization tool at all. Its own site now describes it as "the sales assistant built for customer-facing work," an AI agent for decks, deal-specific pages, and account research, priced in monthly AI credits rather than website traffic.

Mutiny's current pricing reflects that different product: Free at $0/month, Business at $50/month, and Enterprise starting from $40,000/year. It no longer sells website personalization at any tier.

Standalone personalization point tools have largely folded into experimentation platforms' add-on modules instead of standing on their own. If personalization is still the goal, look at VWO's Personalize module or Kameleoon's built-in personalization add-on rather than a dedicated point tool.

## Do you need developers to implement these tools?

Snippet-based tools install without a developer, and event-based analytics needs someone to define what an "event" actually is. Calling this whole category "no-code" is true for one sub-category here and false for another.

| Category | Needs a developer | Why |
|---|---|---|
| Snippet install (Hotjar, Clarity, Crazy Egg, Mouseflow, Unbounce, Perspective, FullStory) | No | One tracking snippet, no event definitions required |
| Event-based analytics (Heap, GA4 beyond basic pageviews) | Partial | Someone still has to decide what counts as a tracked event |
| Code-level experimentation (Kameleoon's code editor tier, VWO's feature-experimentation add-on) | Yes | Ships variations at the code level, not through a visual editor |

A marketer can install the top row alone. The moment a team wants event definitions or code-level experiments, it needs an engineer for at least the setup.

Every top-10 roundup for this query still recycles pricing and product claims that no longer match what the vendors' own pages say today, and picking by job and traffic level beats picking by a flat list of 15 names every time. VWO and Optimizely stopped publishing a number, Mutiny stopped being a personalization tool, and Google still won't tell anyone what Analytics 360 costs.

Start with the traffic-level table above, find your band, and open only the vendor pages for the two or three tools inside it. Recheck the specific prices you care about before a sales call; a page checked in September 2026 is not guaranteed to say the same thing next quarter.

## FAQ

### Which CRO tools have a genuinely free plan instead of only a trial?

Microsoft Clarity (unlimited, forever), Google Analytics 4, Heap (10,000 sessions/month), Hotjar/Contentsquare (200,000 sessions/month), FullStory (30,000 sessions/month), Mouseflow, and Lyssna all publish a real $0 tier. Crazy Egg and Kameleoon offer a time-limited trial instead of an ongoing free plan.

### Do CRO tools improve conversion rates on their own?

No. Every tool in this list only shows or tests behavior; a person still has to look at what it shows and act on it. A heatmap that nobody reviews changes nothing.

### What's the difference between a CRO tool and a CRO platform?

A tool does one job, heatmaps or A/B testing alone. A CRO platform, like VWO or Perspective, bundles several of those jobs into one login and one bill instead of running separate tools side by side.

### Which CRO tools actually use AI, rather than just using the word in marketing copy?

Unbounce's Optimize plan adds AI-driven traffic routing, VWO Copilot turns session recordings into test ideas, and Kameleoon's Prompt-Based Experimentation builds a test from a text prompt. Each does something specific instead of just wearing an AI label. That is what makes it the closest thing to an AI CRO tool in this list.

### What happened to Mutiny, the personalization tool many 2025 roundups still list?

It pivoted to an AI sales-assistant product built for decks and account research. For on-site personalization now, use the module built into VWO, Optimizely, or Kameleoon instead.

### What's the difference between SEO and CRO?

SEO increases how much qualified traffic arrives at a site. CRO increases how much of that traffic converts once it's already there. A CRO tool never needs to touch search rankings at all.