PostHog – We make dev tools for product engineers
All your developer tools in one place. PostHog gives engineers everything to build, test, measure, and ship successful products faster. Get started free.
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PostHog is an open-source all-in-one developer platform for product engineers, providing product analytics, session replay, feature flags, experiments, data warehouse, and AI tools to build successful products.
🚀 Overview
PostHog offers a unified suite of dev tools including product analytics, session replay, feature flags, A/B experiments, surveys, error tracking, data warehouse, customer data platform, and AI assistant—all in one open-source stack.
What problem does this project solve? It addresses fragmented tools and incomplete data by integrating product usage with external sources like payments and support tickets, enabling better decisions on what to build. Who is it built for? Product engineers, data teams, startups, and scale-ups seeking transparency and flexibility. Why did you build it? To create a fast-shipping, cost-effective, open alternative to proprietary SaaS tools, with self-hosting and cloud options.
Keep it human: PostHog empowers engineers to ship faster without sales calls or lock-in, with 98% of users on free tier.
✨ Key Features
- Product Analytics (autocapture events, funnels, retention, paths): Understand user behavior deeply, free up to 1M events/mo
- Session Replay: Visualize and debug user sessions, 5K free/mo
- Feature Flags & Experiments: Safe rollouts and A/B tests, 1M requests free/mo
- Data Stack/Warehouse: 120+ integrations, SQL/BI tools, CDP, 1M rows free/mo
- PostHog AI: Natural language queries, auto-summaries, upcoming bug fixes via code
- Upcoming: More AI automation for product building
🛠 Tech Stack
- Frontend: React, Redux + Kea, Ant Design
- Backend: Django, Rust (high-scale)
- Database: PostgreSQL, ClickHouse, Redis
- Auth: Custom (Django)
- Hosting: Docker self-host, Cloud (usage-based)
👥 Who Is This For?
This project is useful for:
- Developers who want to self-host analytics without vendor costs
- Teams looking for integrated product insights and experiments
- Indie makers building _scalable products with AI assistance
📸 Screenshots / Demo
- Live demo: https://app.posthog.com/demo
- GitHub: https://github.com/PostHog/posthog
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Freemium / Open Source (Generous free tiers cover most users; usage-based beyond, self-host unlimited free. 98% free.)
Is the source code available?
Yes — https://github.com/PostHog/posthog
Can I contribute?
Yes — Read CONTRIBUTING.md, file issues, submit PRs, join Slack/Discord. Active open-source community.
📬 Contact & Links
- Website: https://posthog.com
- GitHub: https://github.com/PostHog/posthog
- Twitter/X: https://twitter.com/posthog
- Email: hello@posthog.com
Built with ❤️ and kept warm on WarmIndex.
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