Can FullStory be vibe coded?
Collect explicit product events and targeted debug snapshots with strong privacy controls
A consolation build is possible, but the paid product's decisive value sits outside a solo rebuild. For FullStory, collect explicit product events and targeted debug snapshots with strong privacy controls. The hard boundary is high-fidelity replay, privacy redaction, indexing, search, storage, and compliance, plus data pipeline reliability and analytical depth.
Jump to the build brief ↓Checked Jul 2026
high editorial confidence
Buildability by layer
Screens, forms, and focused interactions
The repeatable job the product performs
Availability and legality of required data
Uptime, queues, support, and maintenance
Security, compliance, and user confidence
The achievable core
- Collect explicit first-party product events and targeted debug snapshots with strong privacy controls, answer a small set of product questions, and retain raw data under the owner's control.
- Ingest a known data source, calculate a focused metric set, and render a useful dashboard.
- A responsive interface with real empty, loading, success, and error states.
The parts a prompt cannot buy
- high-fidelity replay, privacy redaction, indexing, search, storage, and compliance
- identity stitching
- session replay
- warehouse connectors
- Reliability at the vendor's scale is an operations problem, not a prompt.
- The last 20 percent is sync, migration fidelity, speed, and edge cases.
Why people still pay
People still pay for FullStory because teams pay because analytics must keep collecting and remain trustworthy while the product changes underneath it. The recurring cost buys event schemas, bot filtering, identity, late data, retention, query cost, privacy, backups, and always-on ingestion, not just the visible interface.
Reliability at the vendor's scale is an operations problem, not a prompt.
The last 20 percent is sync, migration fidelity, speed, and edge cases.
The brief
Context, requirements, acceptance criteria, non-goals, and the full production standard — as Markdown, ready for any coding agent.
Build brief — a focused alternative to FullStory
Context
**FullStory** — Collect explicit product events and targeted debug snapshots with strong privacy controls. It currently costs Variable pricing.
A consolation build is possible, but the paid product's decisive value sits outside a solo rebuild. For FullStory, collect explicit product events and targeted debug snapshots with strong privacy controls. The hard boundary is high-fidelity replay, privacy redaction, indexing, search, storage, and compliance, plus data pipeline reliability and analytical depth.
This brief describes a focused, single-operator replacement for the part of FullStory that is genuinely reproducible. It is deliberately narrower than the product it replaces, and it says so in writing. Build the useful core; do not pretend to have rebuilt the rest.
What you are building
Collect explicit first-party product events and targeted debug snapshots with strong privacy controls, answer a small set of product questions, and retain raw data under the owner's control.
Ingest a known data source, calculate a focused metric set, and render a useful dashboard.
A responsive interface with real empty, loading, success, and error states.
Requirements
Functional
Docker.
ClickHouse.
PostgreSQL.
Public HTTPS collector endpoint.
Site script access.
Non-functional
Accessibility: semantic markup, labelled controls, visible focus, and reduced-motion support.
Security: server-side secrets, validated input, and no credentials in the client bundle.
Reliability: retries with backoff on external calls, and a clear failure state when a provider is down.
Portability: the operator can export their data and leave without losing it.
Implementation brief
Build a closest honest personal substitute for FullStory in an empty repository.
Use Next.js 15, TypeScript, ClickHouse, PostgreSQL, and Docker Compose; do not offer alternative stacks.
The core loop is: collect explicit first-party product events and targeted debug snapshots with strong privacy controls, answer a small set of product questions, and retain raw data under the owner's control.
Make the first run work locally with one documented command.
Store all user data locally by default and make export straightforward.
Put secrets in .env, ship .env.example, and never commit credentials.
Ship a lightweight browser SDK for page views and explicit custom events.
Create projects, API keys, environments, event names, and a documented event schema.
Ingest idempotently, filter obvious bots, truncate IP data, and avoid fingerprinting.
Build dashboards for visitors, sessions, funnels, retention, sources, pages, and events.
Expose filters by date, environment, device, country, referrer, and selected properties.
Add retention controls, raw-event export, deletion, health checks, and backup instructions.
Include clear empty, loading, success, and recoverable error states.
Add input validation, safe filenames, and graceful handling of unavailable APIs.
Write focused tests for the core transformation and one end-to-end happy path.
Create a README with setup, architecture, permissions, data location, and backup steps.
Do not add accounts, billing, telemetry, analytics, or a hosted control plane.
Do not claim to reproduce proprietary data, network liquidity, regulated access, or frontier infrastructure.
Deliberately leave out cross-site identity graphs.
Deliberately leave out session replay and automatic DOM capture.
Deliberately leave out warehouse-scale reverse ETL and enterprise governance.
Finish by running the tests and listing the exact commands used.
Delivery standard
Inspect the repository first, then write a short implementation plan before writing code.
Deliver the smallest complete end-to-end workflow first; every primary control must work against persisted data.
Use real validation and storage; never substitute fake dashboards, decorative controls, hard-coded success states, or mock integrations.
Include responsive layouts plus genuine empty, loading, success, validation, and failure states.
Keep secrets server-side in environment variables, provide .env.example, and never commit credentials or user data.
Add structured logs around every external call and return actionable errors without leaking sensitive details.
Write unit tests for the core logic and one automated test of the main user journey.
Finish with a README covering setup, architecture, data location, backups, tests, deployment, and known limitations.
Acceptance criteria
A clean install starts the app using only the README and .env.example.
The primary journey works from first visit through saved result, reload, edit, export, and deletion where applicable.
Invalid input, missing configuration, provider failure, and an empty database each have a usable state.
The interface works at 390px and 1440px, is keyboard navigable, and shows visible focus on every control.
Tests, type checking, linting, and a production build all pass with no ignored failures.
No part of the interface implies a live integration, security guarantee, or scale capability that was not actually built and verified.
Non-goals
Do not build these, and do not claim to have replaced them:
High-fidelity replay, privacy redaction, indexing, search, storage, and compliance.
Identity stitching.
Session replay.
Warehouse connectors.
Reliability at the vendor's scale is an operations problem, not a prompt.
The last 20 percent is sync, migration fidelity, speed, and edge cases.
What you still own after launch
Run migrations, backups, restores, and dependency updates.
Test the critical journey after every model, API, or hosting change.
Monitor failures and fix the edge cases a first prompt will miss.
Risk
**Operational risk.** The code is achievable; dependable data, integrations, and ongoing operations are the real cost.
Editorial confidence in this assessment: high. No independent one-shot implementation is linked yet.
Prior art
Working open-source software you can read, fork, or borrow from before starting:
[Umami](https://github.com/umami-software/umami) — Popular open-source privacy-focused web analytics platform
Generated by [Can It Be Vibe Coded?](https://www.canitbevibecoded.com) · Full report: https://www.canitbevibecoded.com/fullstory
You still own the product
- Run migrations, backups, restores, and dependency updates.
- Test the critical journey after every model, API, or hosting change.
- Monitor failures and fix the edge cases a first prompt will miss.
Open-source prior art
Before you start
Can FullStory be vibe coded?
Not faithfully. A consolation build is possible, but the paid product's decisive value sits outside a solo rebuild. For FullStory, collect explicit product events and targeted debug snapshots with strong privacy controls. The hard boundary is high-fidelity replay, privacy redaction, indexing, search, storage, and compliance, plus data pipeline reliability and analytical depth.
What can an AI coding agent reproduce from FullStory?
Collect explicit first-party product events and targeted debug snapshots with strong privacy controls, answer a small set of product questions, and retain raw data under the owner's control. Ingest a known data source, calculate a focused metric set, and render a useful dashboard. A responsive interface with real empty, loading, success, and error states.
What will a DIY FullStory replacement still be missing?
high-fidelity replay, privacy redaction, indexing, search, storage, and compliance; identity stitching; session replay; warehouse connectors; Reliability at the vendor's scale is an operations problem, not a prompt.; The last 20 percent is sync, migration fidelity, speed, and edge cases.
What do I still own after building a FullStory alternative?
Run migrations, backups, restores, and dependency updates. Test the critical journey after every model, API, or hosting change. Monitor failures and fix the edge cases a first prompt will miss.