# PostHog > Product data platform combining analytics, session replay, feature flags, error tracking and a warehouse, with AI on top. PostHog is a product data platform that combines analytics, session replay, feature flags, experiments, error tracking and a data warehouse. PostHog is used by installing its SDK or setup wizard in an application, after which teams explore the data in the web app, with SQL, or through PostHog AI and an MCP server for agents. **Best for:** Engineering and product teams that want analytics, replays, flags and error data in one system their AI agents can also query. - Official site: https://posthog.com - Listed in: [Data Analysis & Analytics](https://trendhub.net/ai-tools/category/data-analytics), [AI Agents & Automation](https://trendhub.net/ai-tools/category/ai-agents), [DevOps & Monitoring](https://trendhub.net/ai-tools/category/devops-monitoring) - Last checked: 2026-10-09 (facts taken from posthog.com) - Source page: https://trendhub.net/ai-tools/posthog-product-analytics-data-platform ## Key facts - Platforms: Web, API, MCP - Pricing model: Freemium - Free plan: Yes - API: Yes - Made by: PostHog ## What is PostHog? PostHog is a product data platform that collects analytics events, session recordings, errors, logs and business data in one place so that teams and AI agents can query them together. It bundles a long list of tools that are usually bought separately: product and web analytics, session replay, feature flags, experiments, surveys, error tracking, a managed data warehouse with a SQL editor, a customer data pipeline, workflows and AI observability. Data from more than 120 outside sources, such as Stripe, Postgres and HubSpot, can be synced into the warehouse. On top of that sits PostHog AI, which answers questions across the combined data, an MCP server for coding agents, and an Inbox feature in beta that groups findings into reports and drafts pull requests. Pricing is usage-based per product with a monthly free allowance, and an open-source edition is published under the MIT license. ## Key features - **Product and Web Analytics**: Tracks events, funnels and traffic, with one million events included free each month. - **Session Replay**: Records user sessions for playback and detects signals such as dead clicks and long stalls. - **Feature Flags and Experiments**: Controls rollouts and runs A/B tests, billed together on flag requests. - **Error Tracking**: Groups exceptions and stack traces into issues that can be reviewed alongside recordings. - **Data Warehouse**: Stores synced rows from external sources and exposes them through a SQL editor, BI views and an API. - **PostHog AI and MCP**: Lets people ask questions in plain language and gives coding agents direct access to product data from the editor. ## Use cases - **Diagnosing a Conversion Drop**: Combine funnel data, payments and recent code changes to find where users abandon checkout. - **Gradual Feature Releases**: Ship a change to a share of users and compare results before a full launch. - **Bug Triage**: Watch the session that produced an exception to understand what the user did. - **Self-Serve Reporting**: Query product and revenue data with SQL without maintaining a separate warehouse. - **Monitoring LLM Features**: Use AI observability to track events generated by an application's model calls. ## Things to know - **Free tier resets monthly**: Allowances such as 1M analytics events, 5K recordings and 100K exceptions renew each month, and unused amounts do not carry over. - **Free plan limits**: Without a card the account has one project, one-year data retention and community support. - **Billing limits**: On pay-as-you-go, a spending cap can be set per product; data beyond the cap is dropped rather than billed. - **Hosting regions**: PostHog Cloud can be hosted in the US (Virginia) or the EU (Frankfurt). ## FAQs ### What is PostHog? PostHog is a platform that gathers product analytics, session replays, errors and business data in one place. Teams and AI agents query that combined data to understand and improve a product. ### What is PostHog used for? PostHog is used to measure how people use software, replay sessions, roll out features behind flags, run experiments and track errors. ### Is PostHog free? Yes. PostHog has a free plan with a monthly allowance on every product, no credit card and no time limit. Usage stops at the free limits unless a card is added. ### How much does PostHog cost? PostHog charges per product for usage above the monthly free allowance, with prices quoted in US dollars. Per-unit rates and a calculator are on the official pricing page. ### Does PostHog have an API? Yes. PostHog lists an API and webhooks as part of its platform, along with an MCP server for AI agents. ### Is PostHog open source? PostHog publishes an open-source version under the MIT license in addition to its hosted cloud product. ### How long does PostHog keep data? PostHog retains events for one year on the free plan and seven years on a paid plan. Session recordings are kept for one month on the free plan and 90 days on pay-as-you-go. --- Source: https://trendhub.net/ai-tools/posthog-product-analytics-data-platform (trendhub)