Fullstory vs YC Has It: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Fullstory and YC Has It — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Fullstory
FullStory
Behavioral data platform that records user sessions and surfaces sentiment and insights to improve product experience.
Key features
- Session Replay: Continuously records user sessions (clicks, scrolls, page transitions, input) into replayable, timestamped videos with direct links to review exact user interactions for debugging and UX analysis.
- Behavioral Event Capture: Captures rich event streams and structured custom events with properties and schemas, enabling teams to track actions, attributes, and conversion steps across web and mobile.
- SDKs & APIs: Provides official Browser, NodeJS, and mobile SDKs plus HTTP/server APIs for initializing capture, tracking custom events, creating users/events, and programmatic access to session and segment data.
- Searchable Segments & Event Querying: Lets users search and filter sessions by custom event properties, user attributes, and behavior to build segments of users who experienced specific flows or issues.
- Warehouse & Data Integration: Offers tooling and packages (including an official dbt package and export utilities) to move FullStory events into data warehouses and integrate behavioral data into BI workflows.
- Privacy Controls & Data Governance: Includes privacy and masking controls, allowlists/deny-lists, and per-session privacy settings to protect sensitive user data while still collecting actionable behavioral signals.
- Developer Tooling & Middleware: Supplies middleware (e.g., Segment middleware), SPA-friendly browser SDKs, and client/server libraries to simplify integration into single-page apps, mobile apps, and analytics stacks.
- Session replay capturing full user interactions (clicks, scrolls, inputs) for playback
- Custom event tracking with schema overrides and searchable events
- Browser SDK (@fullstory/browser) with init() and FullStory global/API (FS) usage
- Server-side NodeJS SDK for server-to-server HTTP API calls (users, events, batch import jobs)
- Mobile SDKs and mobile-specific APIs (iOS, Android, React Native)
- HTTP APIs and developer documentation for capturing data, retrieving sessions, and managing privacy
- Integrations and middleware (e.g., Segment middleware for Android) to forward events and embed replay links
- Data export and warehouse integrations (Anywhere: Warehouse) and a dbt package for downstream analytics
- Real-time activation integrations (Anywhere: Activation) for driving experiences
- Privacy controls and mobile-only methods (setting/removing attributes, resetting idle timer, class management)
Best for
- Bug reproduction and triage: Engineers and QA replay exact user sessions to reproduce errors, observe the sequence of actions leading to a bug, and correlate with console or custom event data.
- Conversion funnel optimization: Product teams identify where users drop off in multi-step flows by filtering sessions and events, then iterating on UX changes informed by real behavior.
- Product research and UX validation: Researchers observe real user interactions and sentiment patterns to validate hypotheses, discover friction points, and prioritize features or design changes.
- Analytics enrichment and BI: Data teams export FullStory events to warehouses using the dbt package and export utilities to join behavioral data with product and transactional datasets for deeper analysis.
- SPA and mobile instrumentation: Developers integrate the FullStory Browser SDK or mobile SDKs (and Segment middleware) to ensure accurate session capture in single-page apps and native mobile applications.
- Customer support augmentation: Support teams attach session replay links to tickets, quickly see what a user experienced, and provide faster, more context-aware resolutions.
- Feature rollout monitoring: Product and engineering monitor adoption and unexpected behaviors after releases by tracking custom events and segmenting affected sessions or cohorts.
- Product analytics and feature usage measurement via custom events and properties
- UX research and usability testing using session replay to reproduce user flows and issues
- Customer support and troubleshooting by locating sessions that match search criteria and viewing replays
- Conversion funnel analysis by correlating events and session behaviors
- Data engineering and analytics: exporting FullStory events to data warehouses and modeling with dbt
- Real-time personalization and activation by integrating FullStory session context into downstream systems
- Server-to-server automation for user and event management using the NodeJS SDK and HTTP APIs
YC Has It
YC Has It
Describe your problem in plain English and get the Y Combinator startup that solves it — 4,000+ active YC companies indexed.
Key features
- Plain-English Problem Search: Describe what you need and get matched to relevant YC companies
- 4,000+ YC Companies Indexed: Coverage of the active Y Combinator startup ecosystem
- Rewritten Descriptions: Every company is described in user language, not marketing copy
- Reasoning Included: Each match explains why the startup solves your stated problem
- Pricing & Integrations Surfaced: Compare cost and stack fit inline with the recommendation
- 'Not For' Section: Explicitly flags which use cases each startup is not a fit for
- No Login Required: 100% free forever with no signup
Best for
- Find a YC startup that solves a specific engineering or business problem
- Compare multiple YC companies in the same category by pricing and integrations
- Discover niche B2B tools built by recent YC batches
- Research the YC ecosystem without scrolling batch-organized directories
- Rule out ill-fitting startups quickly using the 'Not For' explanations
- Vet a category before founding your own YC-adjacent startup