Fullstory vs Sider Code: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Fullstory and Sider Code — 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
Sider Code
Sider AI
Browser feature that rewrites any webpage from a plain-language instruction and remembers the customization for future visits.
Key features
- Plain-Language Page Editing: Describe the change you want in your own words and Sider Code applies it to the live page without scripts or DOM inspection.
- Persistent Per-Site Customizations: Saved changes reapply automatically the next time you visit that site instead of vanishing on reload.
- Structural Rewrites, Not Just Blocking: Beyond hiding elements, it can restructure content, add new actions, and transform how a page works.
- Page-Content Understanding: Combines comprehension with modification so it can summarize, extract, and explain page content in the same operation.
- Comment Thread Condensation: Turns hundreds of Reddit or Hacker News comments into an overview or a structured debate view.
- Reading Mode Generation: Converts scattered social threads and long chapters into clean articles with tables of contents and comfortable layouts.
- Distraction Removal: Strips elements like the YouTube Shorts shelf or applies dark mode to bright document editors.
- Bundled With Sider Suite: Ships alongside Sider Chat's frontier-model access, Claw browser automation, and Create image, video, and slide generation.
Best for
- Research Reading: Condensing long comment threads into the key viewpoints before deciding whether the discussion is worth reading in full.
- Long-Session Comfort: Applying dark mode or a calmer reading layout to writing tools used for hours at a time.
- Focus Enforcement: Permanently removing recommendation shelves and distraction surfaces from sites you use daily.
- Workflow Adaptation: Reorganizing an internal or third-party web tool so its layout matches how you actually work rather than the default.
- Content Extraction: Pulling structured information out of a page and reshaping it into a more usable view.
- Accessibility Adjustments: Reshaping cluttered pages into cleaner, easier-to-navigate layouts without waiting on the site owner.