Formbricks — Open-Source Survey & Feedback Platform

What it is

Formbricks is an open-source survey and feedback platform designed for in-product research. It lets you embed surveys inside your web application, trigger them based on user actions, and collect structured feedback without sending users to external survey tools. It supports NPS, CSAT, CES, and custom survey types.

It targets product teams and developers who want to collect user feedback at the right moment inside their application, with full control over data and self-hosting options.

How it saves time or tokens

Formbricks removes the friction of external survey tools. Instead of redirecting users to Typeform or Google Forms, surveys appear in-context as tooltips, modals, or embedded forms. Event-based triggers mean surveys show at the right moment (after a feature is used, after onboarding, etc.). For AI applications, you can collect feedback on model outputs directly in the UI, improving your training data and user satisfaction metrics.

How to use

1. Self-host with Docker:

docker compose up -d
# From the Formbricks repository

1. Or use the cloud at formbricks.com.

1. Embed the widget in your app:

<script type="text/javascript">
  !function(){var t=document.createElement("script");
  t.type="text/javascript";t.async=!0;
  t.src="https://your-instance.com/js/formbricks.umd.cjs";
  document.body.appendChild(t)}();

  window.formbricks = { init: { environmentId: 'your-env-id' } };
</script>

Example

// Track user actions and trigger surveys
import formbricks from '@formbricks/js';

// Initialize
formbricks.init({
  environmentId: 'your-env-id',
  apiHost: 'https://your-instance.com'
});

// Track when a user completes an AI-powered task
formbricks.track('ai_task_completed', {
  taskType: 'document_summary',
  modelUsed: 'gpt-4o',
  processingTime: 3.2
});

// This can trigger a survey like:
// 'How helpful was the AI summary? (1-5)'
// Configured in the Formbricks dashboard

Related on TokRepo

• AI tools for research -- Research and user feedback tools
• AI tools for self-hosted -- Self-hostable platforms

Common pitfalls

• Survey fatigue is real. Do not trigger surveys on every page load or action. Use targeted triggers based on meaningful user events and rate-limit survey frequency per user.
• Self-hosting requires PostgreSQL. The Docker setup handles this, but ensure you have backups configured for survey data.
• Custom survey logic (branching, conditional questions) needs configuration in the dashboard. Plan your survey flow before building it.