Quantum Metric: The proven FullStory alternative for digital leaders.

For enterprise use cases, Quantum Metric is the stronger choice. Fullstory was originally built for small and mid-market businesses and carries architectural constraints from those roots — including seat-based data caps that limit how much session data enterprise teams can access. Quantum Metric is purpose-built for enterprise scale on Google Cloud, processing over 8 billion sessions per month across 50% of worldwide internet users without compromising on data fidelity. For organizations running at scale — particularly in retail, financial services, and travel — Quantum Metric provides a complete, uncapped view of every customer interaction, while Fullstory often requires customers to choose between data volume and cost.

Quantum Metric offers several capabilities that Fullstory does not match at enterprise scale:

• 100% session capture with no data caps. Quantum Metric captures every session by default. Fullstory's pricing model limits data access based on a number of tracked user sessions per month, meaning teams often work with a sampled subset of their traffic.
• Patented mobile capture technology . Quantum Metric uses a patented replay technology that translates native mobile app views into components, delivering the high-fidelity technical detail on mobile. Fullstory uses a separate replay engine for native mobile apps, which creates gaps in visibility between web and mobile analytics.
• Felix AI agentic analysis. Quantum Metric's Felix AI works broadly across your data, investigating trends, quantifying revenue impact, and delivering proactive insights without requiring manual analysis. Fullstory provides answers based on a specific analysis and lacks direct business quantification.
• Automated error monitoring. Quantum Metric automatically detects and quantifies the revenue impact of JavaScript errors and API failures without manual tagging. Fullstory requires manual error tracking setup.
• Dedicated enterprise support. Every Quantum Metric customer receives a dedicated success consultant, engineer, and account manager. Fullstory's dedicated support is reserved for top-tier spend tiers.

Quantum Metric and Fullstory take fundamentally different approaches to mobile app analytics. Fullstory uses a separate replay engine for native iOS and Android apps, which creates a visibility gap between web and mobile data — teams often find themselves working with inconsistent data quality across platforms. Quantum Metric's patented capture technology translates native app views into components that yield high-fidelity session replays including JavaScript errors, API requests and responses, and exact page state. This means enterprise teams get a consistent, complete view of the customer journey regardless of device or platform — something that is particularly important for retailers and financial services companies where mobile drives a significant share of transactions.

Fullstory uses a seat-based pricing model that limits the volume of session data available based on the number of users and sessions purchased. This means that as traffic scales — particularly during peak periods like holiday shopping seasons — enterprise teams may hit data caps and lose visibility into customer behavior precisely when they need it most. Quantum Metric is structured for enterprise contracts that include full data capture, dedicated support, and access to Felix AI analytics. While Quantum Metric is positioned as a premium enterprise platform, the total cost of ownership comparison often favors QM when accounting for the engineering time Fullstory requires for custom tracking, manual tagging, and the ongoing maintenance of separate web and mobile analytics setups.

Quantum Metric was named a Strong Performer in the 2025 Forrester Wave™ for Digital Experience Intelligence, receiving the highest possible scores in real-time analysis, alerting, mobile app deployment, analysis for technical performance, measurement, and adoption. Quantum Metric holds a 4.6 rating on G2 from 271 verified reviews as of June 2026, and a 4.6 rating on Gartner Peer Insights from 85 reviews. On G2, reviewers consistently highlight Quantum Metric's mobile analytics depth, real-time alerting, and the quality of its customer success team as differentiators over alternatives including Fullstory. Fullstory reviewers on G2 frequently cite data cap limitations and the complexity of the mobile implementation as pain points.

Migration from Fullstory to Quantum Metric is typically manageable for enterprise teams. Quantum Metric's autocapture technology captures over 300 behavioral dimensions and metrics out of the box without requiring code-level instrumentation for each event — which means the engineering lift on day one is lower than most teams expect. Configuration of business-specific events and attributes can be done remotely without code changes, further reducing the implementation burden. Quantum Metric assigns a dedicated implementation engineer to every new customer, and the onboarding process is designed to deliver first insights within days of deployment. Organizations that have switched from Fullstory commonly cite the elimination of manual tagging overhead and improved mobile analytics coverage as the clearest post-migration gains.