Glassbox vs. Fullstory: Which Platform Is Best For You?

[Updated: June 2025]

Glassbox and Fullstory are both digital experience intelligence platforms designed to help teams analyze user behavior and improve customer journeys across web and mobile. But when it comes to data capture, mobile performance, AI-driven insights and enterprise readiness, the differences are substantial.

If you're researching Fullstory competitors or looking for Fullstory alternatives that scale with your business, this guide breaks down exactly how Glassbox stacks up—and why it’s the top choice for enterprise teams seeking smarter, more complete digital analytics.

Glassbox vs Fullstory: Feature Comparison

Evaluating Fullstory competitors means looking beyond surface-level features to how well each platform actually supports real-time decision-making, mobile engagement and compliance.

Here’s a side-by-side comparison showing why so many enterprises choose Glassbox as the most powerful alternative to Fullstory:*

Why Users Choose Glassbox Over Fullstory

We analyzed customer reviews across platforms like G2, Gartner Peer Insights and Capterra to understand how teams experience Fullstory—and why many are now considering alternatives.

What we found: while Fullstory earns praise for its ease of use and clean interface, enterprise users often outgrow its capabilities as needs around mobile, compliance and data depth increase.

Here are the four most common reasons teams choose Glassbox instead:

1. Tagless Architecture & Real-Time Data Capture

One of the biggest differences between Glassbox and Fullstory is how data is collected and analyzed. Glassbox captures 100% of customer behavior, automatically and in real time. That includes client- and server-side interactions, AJAX calls, JavaScript errors and more. No tagging required. One customer shared:

Fullstory, like many other analytics tools, depends on manual event tagging. That means you need to know what you want to track ahead of time and configure it accordingly. If something breaks or wasn’t tagged, you’ll need to re-tag it and wait to collect enough data before acting.

With Glassbox, you can build funnels retroactively, analyze drop-offs as they happen and surface conversion rate insights without looping in your dev team. It’s faster, more flexible and more accurate, especially for teams managing complex sites or regulated environments.

2. Enterprise-Grade Mobile Analytics

Mobile analytics is another area where Glassbox leads. Its SDK supports a wide range of frameworks and is lightweight enough to avoid common issues like performance degradation or app crashes.

Fullstory offers mobile support, but it’s more limited in scope and can require additional engineering work to function well at scale. For organizations that rely heavily on mobile apps, the difference in SDK maturity is noticeable.

Glassbox also provides built-in crash analysis, gesture tracking and mobile session replay—plus instant, AI-powered summaries from GIA that highlight key takeaways, making it easy to optimize the mobile experience.

A financial services customer shared: 

3. AI-Powered Analysis and Summaries with Glassbox Insights Assistant (GIA)

GIA also summarizes mobile reports instantly, turning complex datasets into clear, actionable insights anyone can understand.

Fullstory has recently introduced AI features, but they’re still evolving. Today, most of what’s available focuses on summarizing sessions—not offering real recommendations or predictive insights.

If your team wants an AI-powered platform that supports decision-making across product analytics, funnel analysis and conversion funnels, GIA delivers practical, real-world value from day one.

4. Data Privacy & Regulatory Compliance

Glassbox was built with enterprise-grade compliance at its core. It includes built-in privacy tooling that aligns with GDPR, CCPA, HIPAA and other major regulatory frameworks. Automated PII masking ensures sensitive information is protected by default, without relying on developers to manually configure every new tag or field.

Because session capture happens server-side, Glassbox can detect technical errors—like failed API calls or 404s—that Fullstory may miss. That kind of visibility is critical for technical teams focused on performance monitoring and customer experience.

An insurance customer summed it up: 

Fullstory, by comparison, is more commonly used by small businesses or mid-market teams. It’s cloud-based, has a shorter data retention window and relies heavily on client-side tracking. For some use cases, that’s enough, but growing teams often run into limitations.

Bottom Line?

If you’re looking for a Fullstory alternative that can support product teams, UX researchers and engineering with the same set of data, Glassbox is built for you. It offers deeper analytics, more advanced features and flexible deployment options—without the tagging overhead.

Customer Ratings

As part of our analysis, we combed through as many verified customer reviews as we could find. Here's how Glassbox and Fullstory compare on G2, which contains over 1,000 reviews across both platforms.

Fullstory vs. Glassbox: Core Feature Comparison

For growing product teams and technical teams alike, choosing the right analytics tool can make or break your ability to scale effectively. But not all Fullstory competitors offer the same level of depth and flexibility across critical features.

Below, we break down how Glassbox and Fullstory stack up across the areas that matter most—like session replay, mobile analytics, behavioral data and integrations.

Session Replay and Event Tagging

Detail matters when it comes to session replay. Glassbox offers pixel-perfect playback with server-side recording, ensuring that every user interaction—from a click to a failed API call—is captured accurately. This depth gives product managers and technical teams full visibility into both front-end and back-end performance, eliminating gaps that might otherwise hinder usability testing or conversion rate analysis.

Fullstory’s reliance on client-side DOM snapshots means it often misses critical backend events. While that may be acceptable for small businesses on a free plan, it can create blind spots for teams focused on user research, predictive analytics and session replay. For enterprises with specific needs around compliance, data retention or market share insights, Glassbox delivers more advanced features out of the box.

Glassbox also eliminates the need for manual event tracking with a fully tagless system. This saves engineering time and reduces the risk of missing key behavioral data. Fullstory users, on the other hand, often need to engage developers repeatedly to refine event coverage—a drawback for product teams running frequent A/B tests or agile experiments.

Mobile Analytics

Mobile analytics shouldn't be an afterthought. Glassbox offers full support for native and hybrid frameworks like Flutter and React Native, with capabilities that go beyond basic crash tracking. Teams get real-time mobile session replay, gesture analysis, funnel visualization and performance monitoring all in one platform. This is especially critical for businesses that prioritize mobile-first customer experience.

While Fullstory does offer a mobile SDK, reviews frequently mention SDK bloat and performance slowdowns. This is a red flag for technical teams working in high-traffic apps, where latency or dropped sessions can harm the user experience and ultimately the conversion rate. Glassbox's lightweight SDK was designed for scale, helping teams identify and fix app issues quickly—without sacrificing speed or resource usage.

In mobile environments where form analytics, funnel analytics and session responsiveness are key to optimizing both product and marketing workflows, Glassbox offers the robust behavioral analytics necessary for success.

Behavioral Analytics & Funnel Analysis

Glassbox empowers teams with on-the-fly funnel creation, enabling analysis of complex user journeys without needing to preconfigure tracking points. This flexibility is a major win for data analysts and product teams who rely on both quantitative analytics and user behavior analytics to uncover actionable insights in real time.

With Fullstory, funnel setup is more rigid, depending on manually tagged events that limit agility—especially when conducting usability testing or exploring qualitative insights. For fast-moving teams focused on user interaction patterns, drop-off points or customer behavior across channels, these limitations can add unnecessary friction to the optimization process.

Glassbox also supports layered analysis, letting teams combine funnel data with performance monitoring, user insights and even customer support tickets. This makes it easier to triage issues, prioritize feature fixes and improve website performance without delay.

Voice of the Silent vs Voice of the Customer

Customer feedback tools are useful, but limited. Most users never fill out a form or respond to a VoC (voice of the customer) survey. That’s why Glassbox was designed to capture the “voice of the silent”: the large majority of users who don’t leave feedback but have a nearly identical experience to those that do.

Instead of relying exclusively on form analytics or surveys, Glassbox analyzes every session in real time to surface behavioral signals like rage clicks, dead clicks and abandoned funnels. These signals are automatically translated into actionable insights, helping customer support, UX and marketing teams understand friction and fix it fast.

By combining VoC data with the voice of the silent, Glassbox gives teams the confidence to act on VoC feedback—knowing it reflects broader patterns, not just the vocal outliers. That means product and business decisions are more accurate, representative and data-backed.

Fullstory emphasizes survey-based insights, which are useful but skewed toward a vocal minority. Glassbox offers a more holistic view and a native VoC collection tool. You can customize surveys to your brand, collect feedback directly in-platform and avoid the need for an additional survey provider.

With Glassbox, teams get a clearer picture of the full customer experience—spoken and unspoken.

Integrations and Flexibility

Data silos block progress. That’s why Glassbox integrates natively with platforms like Salesforce, Tealium and Adobe Analytics, allowing companies to enrich journey data with CRM, CDP, campaign and even Google Analytics insights. These integrations support better decision-making across teams, from marketing and analytics to product management and engineering.

Unlike Fullstory, which may require third-party middleware or custom configuration to achieve the same level of data interoperability, Glassbox provides cross-platform connectivity out of the box. This not only supports advanced analytics use cases but also aligns with enterprise requirements like transparent pricing, flexible deployment options and regional compliance (including the United Kingdom).

Whether you're a fast-growing business or a global enterprise evaluating the best Fullstory alternative, Glassbox offers the scale, insights and integration depth needed to support long-term growth.

Pricing, Implementation & Support

Choosing the right analytics tool isn't just about features—it’s also about fit. Pricing structure, ease of deployment and the level of support your team receives all shape long-term success.

Here’s how Glassbox and Fullstory compare across these critical areas:

Pricing Models

Glassbox offers flexible, transparent pricing tailored to enterprise needs, delivering the clarity and predictability you need to plan ahead. Flexible contract options are available to accommodate product teams, marketing leaders and technical teams alike.

In contrast, Fullstory’s event-based billing can seem attractive at first, especially for small businesses or those exploring a free plan. But as tracking needs grow, many teams encounter cost spikes and data prioritization issues. This often results in reduced coverage or constant tag management to stay within budget.

If your organization is growing or handling sensitive data, Glassbox is the better Fullstory alternative. It’s designed for teams with specific needs and enterprise-scale goals—without unexpected charges or functionality tradeoffs.

Implementation

Glassbox streamlines implementation with a dedicated onboarding team that works closely with your internal stakeholders. From data mapping and CRM alignment to analytics tool configuration and performance monitoring integrations, deployment is simple, even in complex environments.

Pre-built integrations with Adobe Analytics, Google Analytics, Salesforce and Tealium mean you can accelerate time to value without burdening your developers. And because Glassbox is built on a tagless architecture, you won’t be chasing engineering tickets to make updates or fix broken tracking.

Fullstory, on the other hand, requires more manual setup. Users often report needing to configure each tracked event individually, which can delay time-to-insight and overburden already stretched technical teams.

Support & Customer Success

From day one, Glassbox delivers white-glove customer support and strategic guidance. Your team gets access to proactive account management, technical specialists and quarterly business reviews tailored to your goals.

According to Gartner Peer Insights, Glassbox consistently ranks higher than Fullstory across all customer experience and product capability metrics. For enterprises navigating multiple stakeholders and evolving priorities, that kind of partnership is non-negotiable.

Whether you're scaling a global analytics program or evaluating your next best Fullstory alternative, Glassbox gives you more than an analytics tool, it gives you a customer success engine tailored to your business.

Which is Right for Me?

Glassbox and Fullstory both offer value, but they aren’t built for the same use case. If you're a startup or small team focused solely on web analytics and looking for a free plan to get started, Fullstory may cover the basics.

But for product managers, customer support leads and analytics teams scaling fast, those basics can quickly become blockers.

Glassbox is the better Fullstory alternative for:

Glassbox also supports qualitative insights through behavioral data and funnel analytics, helping teams move faster with fewer resources. From usability testing to customer experience optimization, it gives teams the visibility and agility to drive meaningful improvements.

If you’ve hit the ceiling with Fullstory’s client-side limitations or pricing structure, Glassbox is the upgrade you’ve been looking for.

Still Comparing Fullstory Competitors? Try Glassbox First

Take the product tour and see how Glassbox helps the world’s leading digital teams optimize every moment.