VWO is a capable testing platform with a long track record. But its MTU billing model means your costs grow every time your marketing succeeds. Segmently delivers the same core A/B testing power at a flat rate, with a lighter snippet and more per-experiment control.
$0
Segmently starting price
$199/mo+
VWO starting price (10K MTUs)
Flat rate
Segmently pricing model
| Feature | Segmently | VWO |
|---|---|---|
| Free tierSegmently's free tier includes unlimited visitors, 1 active experiment, and 1 project, with no time limit and no credit card required. VWO does not have a permanent free tier; new accounts get a time-limited trial after which a paid plan is required to continue running experiments. VWO has no free tier; a time-limited trial is available | ||
| Starting price | $0/mo | $199/mo (10K MTUs) |
| Pricing modelSegmently charges a flat rate per plan tier regardless of how much traffic your site receives. VWO uses an MTU (Monthly Tracked User) model: each unique visitor tracked by the VWO snippet counts against your plan limit. A traffic spike, a viral post, or seasonal peaks can push you into a higher pricing band mid-month, making costs unpredictable at scale. VWO charges based on how many visitors are tracked each month | Flat rate per plan | Per Monthly Tracked User (MTU) |
| Predictable monthly costSegmently's flat-rate plans mean your bill is the same every month regardless of traffic fluctuations. VWO's MTU pricing means a successful campaign that drives more visitors will also raise your testing costs, creating an inverse incentive: the better your marketing performs, the more expensive your A/B testing becomes. | ||
| Time to first experimentSegmently requires a single script tag and a few clicks to launch a live experiment. VWO's onboarding involves account setup, project configuration, campaign creation, and connecting goals before anything runs. Both are self-serve, but VWO's setup complexity means most new users spend 30 minutes or more before their first experiment is live. | < 5 minutes | 30+ minutes |
| InstallationSegmently installs with a single <script> tag and no additional dependencies. VWO installs similarly via a script tag, but advanced targeting or server-side testing requires SDK integration, adding engineering time. | One line of HTML | Script tag + optional SDK |
| Visual editor (no-code)Both tools provide a point-and-click visual editor that lets you change text, colors, layout, and HTML on your live site without writing code. Segmently's editor uses your already-installed snippet; VWO's editor overlays a Chrome-based interface. | ||
| Anti-flicker protectionBoth tools inject an anti-flicker mechanism to hide the page until experiment changes are applied, preventing visitors from seeing the original content flash before the variant appears. Anti-flicker is critical for experiment data integrity: a visitor who sees both the original and variant version contaminates results. | ||
| Lightweight snippet (< 10 KB)Segmently's snippet is under 10 KB minified and gzipped, with no external dependencies. VWO's snippet is considerably heavier because it bundles visitor tracking, heatmap data collection, session recording hooks, and survey logic into the same load. That weight adds to your Time to Interactive on every page, affecting Core Web Vitals scores and paid traffic performance. VWO's tracking library is significantly larger and includes additional analytics SDKs | ||
| Per-experiment activation delaySegmently lets you set a different activation delay on each experiment: 0ms for a simple text change on a fast page, 400ms for a heavy product page that needs extra time to load before changes apply cleanly. VWO handles anti-flicker with a global account-level setting; every experiment on every page gets the same timing regardless of page complexity. VWO applies anti-flicker globally across the account; per-experiment timing is not available | ||
| SPA / React / Next.js supportSegmently detects client-side navigation by patching history.pushState and automatically re-applies experiment changes on every route change without a page reload. VWO supports SPAs but often requires manual configuration or custom JavaScript to handle framework routing correctly; React and Next.js apps frequently need extra work to prevent changes from reverting on navigation. | ||
| URL targeting rulesBoth tools support experiment targeting by URL, using exact match, contains, starts with, ends with, and regex patterns to control which pages an experiment runs on. | ||
| Device targetingBoth tools let you target experiments to desktop, mobile, or tablet visitors, which is useful for testing device-specific layouts or separating mobile and desktop experiments without cross-device contamination. | ||
| Geo / country targetingBoth tools support targeting experiments by visitor country. Segmently includes country targeting on Professional and above with no code required. VWO includes geo targeting in paid plans; city-level targeting is available on higher VWO tiers. Segmently: Professional+; VWO: included in paid plans | ||
| New vs. returning visitor targetingSegmently automatically detects new vs. returning visitors via a first-party cookie set by the snippet, with no configuration needed. VWO supports new vs. returning segments but requires setting up a visitor segment condition in the campaign targeting step. Segmently: automatic first-party cookie; VWO: requires visitor segment setup | ||
| Traffic percentage controlBoth tools let you limit an experiment to a percentage of eligible visitors, so you can run cautious tests on a 10% slice before scaling to 100%. | ||
| Per-variant CSS/JS injectionEach variant in both tools can carry its own CSS (colors, fonts, layout tweaks) and JavaScript (behavior changes, DOM updates) that applies only to visitors bucketed into that variant. | ||
| Multiple variants per experiment (A/B/C/n)Both tools support running experiments with three, four, or more variants simultaneously, each with its own traffic weight. Useful for comparing multiple CTAs, price points, or hero designs in a single test. | ||
| Multivariate testing (MVT)VWO supports multivariate testing, where multiple page elements are varied simultaneously and all combinations are tested in one campaign. Segmently currently supports A/B and redirect tests; multivariate is on the roadmap. Segmently: MVT on roadmap; VWO: supported on most plans | ||
| Split URL / redirect testingBoth Segmently and VWO support split URL (redirect) testing, where a variant sends visitors to a completely different page URL. In Segmently's visual editor, set the segment action to 'Redirect URL' and enter the destination. The snippet appends an experiment tracking parameter to the redirect URL so conversions on the destination page are correctly attributed to the right variant. VWO has supported split URL tests since its early versions and includes this on all paid plans. | ||
| Conversion goal trackingBoth tools let you define what counts as a conversion: a button click, form submission, page view, or custom JavaScript event, then attribute conversions to the correct variant automatically. | ||
| Multi-page funnel goalsTrack multi-step conversions across multiple pages, e.g., landing page to product page to checkout to purchase. Both tools attribute each funnel step to the variant the visitor was bucketed into. | ||
| Statistical significanceBoth tools calculate statistical significance to tell you whether results are real or random. Segmently uses a chi-squared test and shows confidence levels so you know exactly when to call a winner. | ||
| Persistent variant assignmentOnce bucketed into a variant, a visitor always sees that variant on every return visit. Segmently stores assignments in a first-party cookie and in the database. Without persistent assignment, conversion data becomes unreliable noise. | ||
| Auto traffic optimization (multi-arm bandit)Auto traffic optimization shifts visitor allocation toward winning variants as data accumulates, reducing wasted impressions on underperformers. Segmently includes this on Business tier and above via a toggle. VWO has a similar capability but gates it to their higher growth or enterprise tiers. Segmently: Business+; VWO: available but only on higher plans | ||
| Experiment schedulingSegmently supports scheduling experiments to start and stop automatically on specified dates, so campaigns launch and close in sync with product releases without manual intervention. VWO has limited built-in scheduling; automated start/stop times are not available on all plans. Segmently: Professional+; VWO: limited scheduling options | ||
| Slack experiment notificationsSegmently sends real-time Slack alerts when experiments start, pause, reach statistical significance, or trigger billing and team events, with each event type individually toggleable. VWO has a basic Slack integration but event coverage and configurability are limited. Segmently: Professional+; VWO: basic Slack integration but limited event types | ||
| GA4 / Mixpanel / webhook integrationsBoth tools integrate with Google Analytics 4, Mixpanel, and outgoing webhooks. VWO has a broader integration library with 90+ connections including Hotjar, Salesforce, and HubSpot. Segmently covers GA4, Mixpanel, and custom webhooks on Business tier and above. Segmently: Business+; VWO: includes GA4 and 90+ integrations | ||
| Analytics data export (CSV / JSON)Every Segmently analytics view has one-click CSV and JSON export to pull experiment results into spreadsheets or BI tools. VWO's data export options are more restricted on entry-level plans; full data access typically requires higher tiers or API usage. Segmently: one-click export on all plans; VWO: export limited on lower tiers | ||
| Heatmaps & session recordingsVWO offers heatmaps (click, move, scroll maps) and session recordings as add-ons, which can help understand visitor behavior on key pages. Segmently does not currently offer heatmaps or session recordings; the focus is on experiment-driven conversion optimization. If behavioral analytics are a core requirement, VWO has an advantage here. Segmently: not currently offered; VWO: available as paid add-ons | ||
| In-page surveys & feedbackVWO includes an in-page survey tool that lets you ask visitors questions directly on your site to collect qualitative feedback alongside quantitative A/B results. Segmently is focused on A/B experiment analytics and does not currently offer survey widgets. VWO includes survey widgets; not currently in Segmently | ||
| First-party cookies onlySegmently stores all visitor and assignment data in first-party cookies on your own domain with no third-party tracking. VWO's tracking library may set cookies associated with VWO's infrastructure, depending on your plan and configuration, which can have implications for ITP, GDPR consent flows, and third-party cookie deprecation. | ||
| Non-PII visitor trackingSegmently visitor IDs are randomly generated UUIDs with no link to personal data; no email, IP, or identity is stored. VWO uses visitor profiles that can be cross-referenced with identified users when integrations like CRM or email tools are connected, which requires careful GDPR configuration. | ||
| Team management & rolesSegmently supports team invitations, owner/admin/member roles, and shared project access on every plan, including free. VWO restricts multi-user and team features to Growth and higher tiers, which can limit collaboration for teams on the entry-level plan. Segmently: team roles available on all plans; VWO: multi-user access gated to higher plans | ||
| Transparent public pricingBoth Segmently and VWO publish their pricing publicly. VWO lists MTU-based pricing tiers; Segmently shows flat-rate plan prices. No sales call required on either platform to see what you will pay. |
Information based on publicly available documentation as of March 2026.
VWO's pricing is based on Monthly Tracked Users (MTUs): every unique visitor that the VWO snippet touches counts against your monthly limit. Their Starter plan begins at around $199/month for 10,000 MTUs. If you run a campaign that drives 50,000 visitors in a month, you move to a higher band automatically.
This creates a structural problem: your A/B testing costs are highest exactly when your marketing is working the best. A viral post, a successful paid campaign, or a seasonal surge all trigger higher billing. You end up budgeting for a platform fee that is impossible to predict.
Segmently charges a flat rate per plan tier. A traffic spike does not change your invoice. Your first experiment and your ten-thousandth experiment cost the same.
VWO's tracking library is significantly heavier than Segmently's because it bundles heatmap hooks, session recording instrumentation, and survey scripts into the same snippet that runs on every page. Even if you never use those features, the code loads.
Segmently's snippet is under 10 KB minified and gzipped, with no bundled extras. The code that runs on your visitors' browsers does exactly what A/B testing requires and nothing more. For sites where Core Web Vitals affect paid search quality scores, this difference matters.
VWO applies its anti-flicker delay as a global account setting. Every experiment on every page gets the same timing, whether it's a simple headline swap on a fast marketing page or a complex component change on a slow product page.
Segmently lets you set an activation delay independently for each experiment. A lightweight experiment gets a 0ms delay for instant reveal. A complex experiment on a framework-heavy page can be given 300ms or more to ensure changes are fully applied before the page becomes visible. This level of control prevents the two worst outcomes: flicker on fast experiments and premature reveals on complex ones.
VWO has a broader behavioral analytics suite. Their heatmaps, session recordings, in-page surveys, and form analytics are genuinely useful for understanding visitor behavior beyond what A/B test results alone can show. If your team actively uses session replay and heatmap data as part of the research process before launching experiments, VWO offers that all in one platform.
VWO also has a deeper integration library with 90+ connections including Salesforce, HubSpot, and Hotjar. And as an established platform since 2009, it has a larger community and more published case studies.
Choose Segmently if you want to start free without a trial countdown, need costs that do not scale with traffic, run experiments on React or Next.js and need zero-config SPA support, want per-experiment anti-flicker control instead of a one-size-fits-all global setting, or care about keeping your snippet weight and visitor data footprint as small as possible.
Flat-rate pricing, a lightweight snippet, and per-experiment anti-flicker control. Start free, no MTU cap, no credit card required.