Website & Conversion Optimization Tools
Updated
42 Website & Conversion Optimization tools in 4 subcategories, each shown as a card. Each card says what the tool does and, where we have the details, its price, free tier, best use and main limit.
Subcategories: A/B Testing & Experimentation (13), Personalization Engines (11), Forms & Survey Tools (13), Interactive Calculators & Quizzes (5).
We may earn a commission from some links on this page. This is one of 12 categories in the full directory of 755 tools.
Website & Conversion Optimization
42 tools across 4 subcategories
A/B Testing & Experimentation
13For running experiments, VWO is the most complete mid-market suite (testing plus heatmaps and recordings), Convert is the privacy-first pick for agencies, and Optimizely is the enterprise standard on custom pricing. GrowthBook is the open-source, warehouse-native option engineering teams can self-host for free.
A/B testing, experimentation, and behavior analytics platform.
- Best for
- Mid-market and enterprise teams running experimentation programs.
- Free?
- 30-day free trial; no permanent free plan
- Paid from
- Custom pricing (quote-gated)
StrengthFull-stack: testing, heatmaps, session recordings, personalization.
Watch-outPricing quote-gated and opaque; costly for small teams.
Alternative to Optimizely, Convert
A/B testing and experimentation platform focused on privacy and agencies.
- Best for
- CRO agencies and privacy-conscious teams running A/B tests.
- Free?
- 15-day free trial; no free tier
- Paid from
- $299/mo (Growth, annual)
StrengthPrivacy-first, all features on every plan, strong agency support.
Watch-outNo free tier; overage charges per extra 100K users.
Alternative to VWO, Optimizely
AI digital experience platform with experimentation, CMS, and personalization.
- Best for
- Enterprises running large-scale experimentation across channels.
- Free?
- No free tier; sales-led only
- Paid from
- Custom pricing (sales-led)
StrengthMature stats engine and broad digital-experience feature set.
Watch-outExpensive, sales-led, and complex; overkill for small teams.
Alternative to VWO, Convert
A/B testing, multivariate testing, and personalization for web and apps.
- Best for
- Mid-market and enterprise marketing teams optimizing digital experiences.
- Free?
- No free trial; free 1 to 2 week proof of concept
- Paid from
- Not listed
StrengthCombines experimentation, personalization, and feature flags in one platform.
Watch-outSales-led pricing, no free trial, costly for small teams.
Alternative to Optimizely, VWO
Feature flag management and experimentation platform for engineering teams.
- Best for
- Engineering teams managing feature rollouts and flag-based experiments.
- Free?
- Free Developer plan: unlimited seats, 14-day retention
- Paid from
- Usage-based (Foundation plan, billed yearly)
StrengthMature feature flagging with unlimited seats even on free plan.
Watch-outUsage-based pricing is complex; experimentation is not core focus.
Alternative to Split.io, Statsig
Feature flagging and experimentation, now part of Harness FME.
- Best for
- Engineering teams pairing feature flags with data-driven experiments.
- Free?
- Harness free tier exists; FME not clearly included
- Paid from
- Not listed
StrengthFeature-flag data ties releases to metric impact automatically.
Watch-outAcquired by Harness; FME now bundled into Enterprise pricing.
Alternative to LaunchDarkly, Statsig
A/B testing, feature experimentation, and AI personalization for web and apps.
- Best for
- Product and marketing teams running experiments plus personalization.
- Free?
- Free trial of PBX (AI experimentation)
- Paid from
- Not listed
StrengthAI prompt-based experiment building plus web and feature testing.
Watch-outSales-led custom pricing; no public rates published.
Alternative to AB Tasty, Optimizely
No-code personalization and AI GTM assistant for B2B teams.
- Best for
- B2B marketing teams personalizing sites for target accounts.
- Free?
- Free trial (start for free)
- Paid from
- Not listed
StrengthBuilt for B2B account-based personalization without engineering.
Watch-outSales-led pricing; product now spans broader GTM tooling.
Alternative to Optimizely, RightMessage
AI website personalization and optimization, now Webflow Optimize.
- Best for
- Marketing teams running AI-driven page optimization and personalization.
- Free?
- No free tier; sales-led
- Paid from
- Not listed
StrengthAI automatically tests many page variations to lift conversions.
Watch-outAcquired by Webflow; now sold as Webflow Optimize add-on.
Alternative to Mutiny, Optimizely
Full-stack CRO platform for A/B testing and personalization.
- Best for
- Teams wanting all-inclusive testing and personalization by traffic tier.
- Free?
- Free trial available
- Paid from
- Not listed
StrengthAll features included, priced by traffic not feature gates.
Watch-outSales-led pricing; smaller brand than Optimizely or VWO.
Alternative to VWO, AB Tasty
Warehouse-native experimentation and feature flagging, now Datadog Experiments.
- Best for
- Data and engineering teams running warehouse-native experiments.
- Free?
- Not listed
- Paid from
- Not listed
StrengthConnects directly to your warehouse; strong statistics and governance.
Watch-outAcquired by Datadog; pricing not published.
Alternative to Statsig, GrowthBook
Feature flags, experimentation, analytics, and session replay in one.
- Best for
- Product and engineering teams wanting experimentation plus analytics cheaply.
- Free?
- Free Developer: 2M events/mo, unlimited flag checks
- Paid from
- $150/mo (Pro)
StrengthVery generous free tier; combines flags, experiments, and analytics.
Watch-outEvent-metered pricing can rise with heavy analytics usage.
Alternative to GrowthBook, Split.io
Warehouse-native feature flags, experimentation, and product analytics.
- Best for
- Engineering and data teams wanting self-hostable experimentation.
- Free?
- Free cloud Starter; MIT open-source self-host is free
- Paid from
- $40/seat/mo (Cloud Pro)
StrengthOpen-source, warehouse-native, unlimited flags, strong stats engine.
Watch-outSelf-hosting needs engineering effort; advanced features gated.
Alternative to Optimizely, VWO
Personalization Engines
11Enterprise personalization and experimentation platform, owned by Mastercard.
- Best for
- Enterprises personalizing web, app, and email experiences.
- Free?
- No free tier; sales-led
- Paid from
- Custom quote (enterprise)
StrengthCross-channel personalization, recommendations, and A/B testing at scale.
Watch-outEnterprise pricing and setup; overkill for small stores.
Alternative to Nosto, Searchspring
AI digital experience platform with experimentation, CMS, and personalization.
- Best for
- Enterprises running large-scale experimentation across channels.
- Free?
- No free tier; sales-led only
- Paid from
- Custom pricing (sales-led)
StrengthMature stats engine and broad digital-experience feature set.
Watch-outExpensive, sales-led, and complex; overkill for small teams.
Alternative to VWO, Convert
No-code personalization and AI GTM assistant for B2B teams.
- Best for
- B2B marketing teams personalizing sites for target accounts.
- Free?
- Free trial (start for free)
- Paid from
- Not listed
StrengthBuilt for B2B account-based personalization without engineering.
Watch-outSales-led pricing; product now spans broader GTM tooling.
Alternative to Optimizely, RightMessage
AI website personalization and optimization, now Webflow Optimize.
- Best for
- Marketing teams running AI-driven page optimization and personalization.
- Free?
- No free tier; sales-led
- Paid from
- Not listed
StrengthAI automatically tests many page variations to lift conversions.
Watch-outAcquired by Webflow; now sold as Webflow Optimize add-on.
Alternative to Mutiny, Optimizely
Social proof notifications and website personalization to lift conversions.
- Best for
- Marketers adding social proof and visitor personalization.
- Free?
- 14-day free trial
- Paid from
- Not listed
StrengthSocial proof widgets install fast and claim quick conversion lifts.
Watch-outPricing not published; feature depth narrower than full engines.
Alternative to RightMessage, Nosto
Website and email personalization synced to your email platform.
- Best for
- Creators and marketers personalizing content by subscriber segment.
- Free?
- 14-day free trial (card required)
- Paid from
- $99/mo
StrengthBi-directional sync personalizes both site and email content.
Watch-outHigher $99 entry price; niche versus big engines.
Alternative to Proof / Useproof, Dynamic Yield
AI customer agent platform for regulated European markets.
- Best for
- European enterprises deploying compliant AI customer agents.
- Free?
- No free tier; pilot only
- Paid from
- Not listed
StrengthCompliance-first (GDPR, EU AI Act) with pay-per-outcome model.
Watch-outPivoted from web personalization; sales-led, no public pricing.
Alternative to RightMessage, Mutiny
Personalization and A/B testing for composable content, now Contentful.
- Best for
- Marketing teams personalizing headless, composable content stacks.
- Free?
- No free tier; sales-led
- Paid from
- Not listed
StrengthAPI-first personalization built into Contentful's content platform.
Watch-outAcquired by Contentful; sales-led, tied to that ecosystem.
Alternative to Dynamic Yield, Optimizely
Enterprise AI search, product discovery, and personalization platform.
- Best for
- Enterprises unifying AI search and recommendations across channels.
- Free?
- Free trial available
- Paid from
- Not listed
StrengthHybrid AI search plus recommendations across commerce and service.
Watch-outSales-led query-based pricing; enterprise complexity and cost.
Alternative to Algolia Recommend, Dynamic Yield
AI product recommendations add-on for Algolia search.
- Best for
- Product teams adding recommendations to Algolia-powered search.
- Free?
- Free Build plan: 10,000 recommendation requests/month
- Paid from
- $0.60 per 1,000 requests (after 10k free)
StrengthUsage-based recommendations that plug into existing Algolia search.
Watch-outRequires Algolia; costs scale with request volume.
Alternative to Coveo, Nosto
AI commerce personalization platform: recommendations, search, and content.
- Best for
- Growing and enterprise ecommerce brands personalizing the storefront.
- Free?
- No free trial; proof-of-concept for qualified merchants
- Paid from
- Custom quote (base fee plus GMV-based fee)
StrengthAI personalization across recommendations, search, and merchandising.
Watch-outCustom enterprise pricing; no self-serve or free trial.
Alternative to Dynamic Yield, Clerk.io
Forms & Survey Tools
13Advanced form builder plugin for WordPress websites.
- Best for
- WordPress site owners building advanced forms and workflows.
- Free?
- No free version; online demo only
- Paid from
- $59/year (Basic license)
StrengthExtensible WordPress forms with add-ons and developer hooks.
Watch-outWordPress only; no free version or trial.
Alternative to WPForms, Formstack
Beginner-friendly drag-and-drop form builder plugin for WordPress.
- Best for
- WordPress users wanting easy forms without coding.
- Free?
- Free WPForms Lite version (3% payment fee)
- Paid from
- $49.50/year (Basic, first year; renews $99)
StrengthBeginner-friendly WordPress form builder with prebuilt templates.
Watch-outWordPress only; best features need higher licence tiers.
Alternative to Gravity Forms, Formstack
Conversational, one-question-at-a-time forms, surveys, and quizzes.
- Best for
- Brands wanting engaging, well-designed forms and surveys.
- Free?
- Free: 100 responses/mo, unlimited forms
- Paid from
- $28/mo (Basic, annual) or $39/mo monthly
StrengthConversational, one-question-at-a-time forms with high completion rates.
Watch-outResponse caps per tier; costs rise with volume.
Alternative to JotForm, Tally
Drag-and-drop online form builder with 10,000+ templates.
- Best for
- Small businesses building forms, surveys, and workflows.
- Free?
- Free: 5 forms, 100 submissions/mo
- Paid from
- $34/mo (Bronze, annual) or $39/mo monthly
StrengthHuge template library and generous features on entry tiers.
Watch-outMonthly submission caps; branding on the free plan.
Alternative to Typeform, Formstack
Free form and survey builder inside Google Workspace.
- Best for
- Anyone needing quick, free forms and surveys.
- Free?
- Free with a Google account
- Paid from
- Free
StrengthCompletely free, unlimited forms and responses, Sheets integration.
Watch-outBasic design and logic; limited customization or branding.
Alternative to Typeform, SurveyMonkey
Notion-style form builder with unlimited free forms and responses.
- Best for
- Creators and startups wanting free, flexible forms.
- Free?
- Free: unlimited forms and submissions
- Paid from
- $24/mo (Pro)
StrengthGenuinely unlimited free plan including logic and integrations.
Watch-outBranding removal, custom domains, and analytics need Pro.
Alternative to Typeform, Fillout
Form builder with conditional logic, payments, and many field types.
- Best for
- Teams wanting capable free forms with integrations.
- Free?
- Free: unlimited forms, 1,000 responses/mo, unlimited seats
- Paid from
- $15/mo (Starter, or $180/year)
StrengthGenerous free tier with unlimited seats and rich field types.
Watch-outResponse caps per tier; newer with a smaller ecosystem.
Alternative to Tally, Typeform
Survey platform with question logic, analysis, and benchmarks.
- Best for
- Teams and researchers running surveys and collecting feedback.
- Free?
- Free Basic: 10 questions, 25 responses per survey
- Paid from
- $46/mo (Advantage, annual); $99/mo Standard monthly
StrengthEstablished survey brand with strong analysis and benchmarking.
Watch-outFree plan very limited; response caps and pricier tiers.
Alternative to Typeform, Qualtrics
Enterprise experience management for surveys, CX, and research.
- Best for
- Enterprises running advanced CX, EX, and market research.
- Free?
- Not listed
- Paid from
- Not listed
StrengthAdvanced survey logic, statistics, and experience-management suite.
Watch-outSales-led pricing; expensive and complex for simple surveys.
Alternative to SurveyMonkey, Formstack
Online forms with workflows, approvals, and data routing.
- Best for
- Teams automating data collection and document workflows.
- Free?
- 14-day free trial; no free plan
- Paid from
- $83/mo (Forms, annual) or $99/mo monthly
StrengthStrong workflow automation, approvals, and compliance features.
Watch-outHigh entry price; no permanent free plan.
Alternative to JotForm, WPForms
Document-style form and survey builder with payments.
- Best for
- Small businesses wanting design-flexible forms and payments.
- Free?
- Free: unlimited forms, 30 submissions/mo; 7-day Pro trial
- Paid from
- $24/mo (Essentials) or $288/year
StrengthHighly customizable, document-like forms with built-in payments.
Watch-outLow free submission cap.
Alternative to Typeform, JotForm
Minimal, well-designed forms for growth and marketing teams.
- Best for
- Marketing teams wanting clean, on-brand lead forms.
- Free?
- Free plan (Reform branding; cannot publish live)
- Paid from
- $15/mo (Basic) or $150/year
StrengthClean, minimal design with unlimited responses on paid plans.
Watch-outFree plan cannot publish live forms; smaller ecosystem.
Alternative to Tally, Fillout
Form backend that emails submissions, no server needed.
- Best for
- Developers adding form handling to static sites.
- Free?
- Free: 250 submissions, up to 10 forms
- Paid from
- $25 one-time (50,000 submissions; usually $50)
StrengthOne-time payment, no subscription; submissions never expire.
Watch-outBackend only, no form builder UI; bundle credits.
Alternative to Fillout, Reform
Interactive Calculators & Quizzes
5No-code builder for quizzes, calculators, and interactive funnels.
- Best for
- Marketers building interactive lead-gen funnels and quizzes.
- Free?
- Free: up to 50 submissions or 500 visits/mo
- Paid from
- $19/mo (Start, annual) or $29/mo monthly
StrengthFlexible funnels combining quizzes, calculators, forms, and payments.
Watch-outLow free submission cap; funnels lock when exceeded.
Alternative to Outgrow, Interact
Quiz funnel and scorecard builder for lead generation.
- Best for
- Coaches and marketers running quiz-based lead funnels.
- Free?
- Free: 1 scorecard, 10 responses/mo
- Paid from
- $30/mo (Starter, annual) or $39/mo monthly
StrengthPurpose-built scorecard quizzes with CRM and landing pages.
Watch-outResponse caps per tier; niche around scorecard quizzes.
Alternative to Interact, Outgrow
Builder for interactive calculators, quizzes, assessments, and polls.
- Best for
- Marketers generating leads with interactive content.
- Free?
- Free Forms/Surveys plan; 7-day business trial
- Paid from
- $14/mo (Freelancer Limited, annual; $22 monthly)
StrengthWide range of interactive content types with templates.
Watch-outLower tiers limit content types and monthly leads.
Alternative to involve.me, ScoreApp
Quiz maker for lead generation and audience segmentation.
- Best for
- Creators and ecommerce brands building lead-gen quizzes.
- Free?
- Free: 2 quizzes, 100 completions/mo
- Paid from
- $27/mo (Lite, annual)
StrengthQuiz templates with branching logic and email integrations.
Watch-outFree plan lacks integrations; lead caps per tier.
Alternative to ScoreApp, involve.me
Builder for interactive web calculators with online payments.
- Best for
- Businesses embedding custom calculators with online payments.
- Free?
- 30-day full-featured trial (500 views)
- Paid from
- $19/mo (Lead generation plan)
StrengthCalculators with online payments and multi-page logic.
Watch-outNarrow focus on calculators; trial, not a free plan.
Alternative to Outgrow, involve.me