Open-source product platform combining product analytics, session replay, feature flags and experiments, surveys, error tracking, logs and data sources, priced per product on usage above a monthly free allowance.
PostHog bundles several product tools in one platform: product analytics (trends, funnels, paths, stickiness, lifecycle and retention insights, dashboards and alerts), session replay, feature flags and experiments, surveys, error tracking, logs, external data sources, destinations and AI observability. Data is captured through SDKs for web, mobile and server languages, and the platform can also be driven through an MCP client or the API.
Pricing is per product: every product has a monthly free allowance (for example the first 1 million analytics events and 1 million feature flag requests, 5,000 session recordings, 1,500 survey responses, 100,000 exceptions and 10 GB of logs), and the pay-as-you-go plan has a $0 base price with tiered usage rates above the allowance that fall at higher volumes. Optional billing limits stop ingestion once a set spend is reached. The free plan allows 1 project with 1 year of data retention; the paid plan allows 6 projects and 7 years.
PostHog publishes a Docker Compose self-hosted deployment under the MIT license, but states self-hosting is officially unsupported, ships without tagged releases and is limited to free-plan features; all paid-plan features are cloud-only. It suits product and engineering teams that want analytics, replay and feature management from one vendor with usage-based billing.
Free plan available; usage-based pricing
Free
Limits: Monthly free allowance on every product; 1 project; 1 year data retention; community support
Conditions: No credit card required
Currency inferred from the US pricing page (shown as $ only). Read from the Markdown version of the official pricing page because posthog.com/pricing renders prices via JavaScript.
Free
Limits: 6 projects; 7 year data retention; email support; same free allowances as Free, usage above them billed per product
Currency inferred from the US pricing page (shown as $ only). Page states '$0/mo base price'. Recorded as a zero-cost base plan; the usage rates are the separate rows.
| Item | Rate | Details | Source and check date |
|---|---|---|---|
| Product analytics, events | USD 0.00005 per event above 1,000,000 free events per month | First 1,000,000 events per month freeFirst paid band; rates fall at higher volumesCurrency inferred from the US pricing page (shown as $ only). | Source for Product analytics, events (opens in a new tab)Checked October 24, 2026 |
| Session replay, recordings | USD 0.005 per recording above 5,000 free recordings per month | First 5,000 recordings per month freeFirst paid band; rates fall at higher volumesCurrency inferred from the US pricing page (shown as $ only). | Source for Session replay, recordings (opens in a new tab)Checked October 24, 2026 |
| Feature flags and experiments, requests | USD 0.0001 per flag request above 1,000,000 free requests per month | First 1,000,000 requests per month freeFirst paid band; rates fall at higher volumesCurrency inferred from the US pricing page (shown as $ only). | Source for Feature flags and experiments, requests (opens in a new tab)Checked October 24, 2026 |
| Surveys, responses | USD 0.10 per survey response above 1,500 free responses per month | First 1,500 survey responses per month freeFirst paid band; rates fall at higher volumesCurrency inferred from the US pricing page (shown as $ only). | Source for Surveys, responses (opens in a new tab)Checked October 24, 2026 |
| Error tracking, exceptions | USD 0.00037 per exception above 100,000 free exceptions per month | First 100,000 exceptions per month freeFirst paid band; rates fall at higher volumesCurrency inferred from the US pricing page (shown as $ only). | Source for Error tracking, exceptions (opens in a new tab)Checked October 24, 2026 |
| Logs | USD 0.25 per GB above 10 GB free per month | First 10 GB per month freeFirst paid band; rates fall at higher volumesCurrency inferred from the US pricing page (shown as $ only). | Source for Logs (opens in a new tab)Checked October 24, 2026 |
Prices checked on October 24, 2026 from the vendor's official page. Vendors change prices; confirm before buying. How we check prices. Official pricing page (opens in a new tab)
Product and engineering teams, from startups to larger companies, that want product analytics, session replay, feature flags and related tooling from one platform with usage-based billing and the option to self-host the free feature set.
This page is based on desk research of the vendor's public pages and documentation. SIDAN Stack has not tested this product hands-on. How we research. Last verified: October 24, 2026.
Algolia is a hosted search and discovery API. Developers push records to indices and query them through official API clients, InstantSearch UI libraries and an Autocomplete library, with features for ranking, synonyms, rules, personalization, recommendations, analytics and A/B testing. Higher tiers add AI ranking, query categorization and NeuralSearch. Pricing is usage-based on search requests and records.
Free plan available; usage-based pricing
Datadog is a cloud monitoring and security platform that brings infrastructure metrics, application traces, logs, real user and synthetic monitoring, database monitoring, CI visibility and security products (code, cloud and SIEM) into one service with shared dashboards, alerting and more than 1,000 built-in integrations. Each product is billed separately, mostly per host, per GB or per million events.
Free plan available; usage-based pricing
Google Analytics 4 is Google's web and app analytics product. It uses an event-based data model to collect website and app data in one property, offers standard reports and explorations, predictive metrics and audiences, links to Google Ads and other Google media platforms, and exports raw events to BigQuery. The standard version is free; Analytics 360 is the paid enterprise version sold through sales.
Free plan available; custom pricing on request
Pinecone is a managed vector database for AI applications. Serverless indexes support dense, sparse, full-text and hybrid search with metadata filtering, namespaces for multi-tenancy, integrated embedding and reranking models, backups and dedicated read nodes. Pinecone Assistant adds a managed RAG service. A free Starter plan is available; paid plans bill on storage, read and write units.
Free plan available; paid plans from USD 20 per month