PostHog vs Amplitude (2026): Open-Source vs Enterprise

What Is PostHog?

PostHog is an open-source product analytics platform founded in 2020, built with an explicit philosophy: give developers the full product analytics stack in a single platform that they can run themselves. Rather than forcing teams to stitch together Mixpanel for analytics, FullStory for session replay, LaunchDarkly for feature flags, and Optimizely for A/B tests, PostHog bundles all of these capabilities into one open-source codebase.

PostHog is available as a fully managed cloud product (PostHog Cloud) with a generous free tier or as a self-hosted deployment on your own infrastructure. The self-hosted path gives engineering teams complete data ownership — no data leaving their cloud environment, no third-party data processing agreements to manage.

Key capabilities include: product analytics (funnels, retention, user paths, session recordings), feature flags, A/B testing, error tracking, surveys, and a data warehouse connector. The platform is widely used by engineering-led SaaS companies, developer-tool businesses, and any organization where data privacy and control are non-negotiable.

What Is Amplitude?

Amplitude is a commercial digital analytics platform founded in 2012, positioning itself as the system of record for behavioral data at enterprise scale. It provides event-based analytics, behavioral cohort analysis, user journey mapping, retention analysis, and — through Amplitude Experiment — native A/B testing and feature rollout management.

Amplitude's data governance layer (Amplitude Data, formerly Iteratively) allows data teams to define tracking plans, validate event schemas, and block bad data before it pollutes the analytics database. This governance infrastructure is a key differentiator for larger organizations managing analytics across multiple product surfaces and dozens of engineers who all touch instrumentation code.

Amplitude also offers Amplitude CDP for real-time event routing and Predictive Cohorts powered by machine learning. The platform is primarily used by product managers, data analysts, and growth engineers at B2B SaaS, fintech, and consumer technology companies ranging from Series A to public enterprise.

Side-by-Side Comparison

Pricing Comparison

PostHog Pricing (2026)

PostHog uses transparent usage-based pricing with no seat fees. The first 1 million events per month are always free — this resets every month regardless of whether you are on a paid plan. More than 90% of PostHog users operate entirely within the free tier.

Above 1 million events, pricing starts at $0.00005 per event (1–2 million events), declining to $0.0000343 for 2–15 million, $0.0000295 for 15–50 million, and as low as $0.000009 per event above 250 million. Session replays are billed per recording above 5,000 per month free. Feature flag requests above 1 million per month cost extra. You can set billing limits per product to prevent surprise costs.

Self-hosted PostHog (running on your own Kubernetes cluster) is free for the open-source version, though PostHog Enterprise adds support SLAs and advanced features on top of the self-hosted base.

Amplitude Pricing (2026)

Amplitude's Starter plan is free for up to 10,000 monthly tracked users and 2 million events. The Plus tier is $49 per month (annual billing) and covers up to 300,000 MTUs and 25 million events — a strong entry point for growing startups. Growth and Enterprise are fully custom-priced, with the median Amplitude customer paying approximately $63,720 per year. Large enterprise deployments with 1 million or more MTUs can exceed $150,000 per year.

Amplitude Experiment (A/B testing) and Amplitude CDP are priced separately. Group Analytics for account-level analysis is an additional cost. For teams comparing total cost of ownership, PostHog's all-in-one bundling often results in meaningful savings at equivalent event volumes.

Data Collection Method Compared

Both PostHog and Amplitude rely on intentional event tracking rather than autocapture — your team defines a tracking plan, instruments events in code, and sends those events to the platform. However, PostHog does offer a basic autocapture feature that automatically captures clicks, form submissions, and page views without custom instrumentation. This can reduce the initial engineering investment for teams without a mature tracking plan.

Amplitude's tracking is purely intentional and benefits from Amplitude Data's schema validation layer. Events that do not match the defined schema can be blocked, flagged, or warned on — giving data teams a governance mechanism that PostHog does not match in maturity.

PostHog's self-hosted deployment means all event data stays within your infrastructure from the moment of capture — a significant advantage for fintech, healthtech, and European companies subject to GDPR or financial data regulations. With Amplitude, all data is processed on Amplitude's cloud, which introduces data residency and DPA considerations.

Analytics Capabilities

Funnels and Retention

PostHog's funnel analysis covers the core needs of most product teams — multi-step funnels, conversion windows, cohort comparisons, and drop-off visualization. It is not as polished as Mixpanel's funnel builder, but it handles the fundamentals well. Retention analysis includes N-day retention and unbounded retention views.

Amplitude's funnel and retention analytics are more mature and configurable, with options to hold properties constant across funnel steps, compare cohort conversion rates over time, and combine funnel analysis with predictive scoring. For data-led organizations running rigorous retention experiments, Amplitude offers more analytical horsepower.

Behavioral Cohorts

Amplitude's behavioral cohorts are a signature capability — you can define cohorts based on any sequence of events and properties, compute them on demand or on a schedule, and sync them to ad platforms, CRMs, and email tools. Predictive Cohorts use machine learning to predict conversion or churn likelihood without manual model building.

PostHog's cohort capabilities are more basic. You can filter user lists by event history and properties, but the depth of cohort definition and the breadth of downstream syncing destinations is narrower than Amplitude's.

Session Replay

PostHog includes session replay natively — 5,000 recordings per month free, then usage-based pricing above. This means product and engineering teams can correlate quantitative analytics with qualitative session data in the same platform. Amplitude offers session replay as a paid add-on without the same native integration into the analytics workflow.

Ease of Use and Implementation

PostHog is built by engineers for engineers. The documentation is developer-first, the SDK design is clean, and the platform makes reasonable defaults for teams starting from scratch. Non-technical stakeholders (product managers, marketers) can use the PostHog UI for basic analysis, but the depth of self-serve insight generation is lower than Amplitude for non-technical users.

Amplitude has invested heavily in its UI for non-technical product managers. Chart builders, saved dashboards, and the automated Amplitude Compass discovery feature reduce the need for deep technical knowledge to generate insights. For organizations where PMs and growth leads need to be self-sufficient in analytics, Amplitude's UI accessibility is an advantage.

Self-hosting PostHog adds operational overhead — deploying on Kubernetes, managing upgrades, provisioning storage for large event volumes. Teams without DevOps capacity should use PostHog Cloud rather than self-hosted. PostHog Cloud removes the operational burden while preserving the generous free tier.

Integrations

PostHog integrates with Segment, RudderStack, Sentry, Zapier, Slack, GitHub, and a growing list of data warehouses including BigQuery, Snowflake, and Redshift via its data warehouse connector. The integration ecosystem is narrower than Amplitude's but covers the most common needs for product and engineering teams.

Amplitude's integration catalog is significantly broader — particularly for outbound cohort syncing (Braze, Iterable, Facebook Ads, Google Ads, Salesforce). For organizations that need to push behavioral segments into multiple downstream tools, Amplitude's integration depth is a real advantage. Amplitude CDP adds real-time event routing without requiring a separate CDP solution.

AI and Predictive Features

Amplitude's AI investments are more mature. Predictive Cohorts score users by conversion and churn likelihood. Amplitude Forecast projects future metric trajectories. An AI-assisted query builder lets analysts ask natural-language questions and receive chart responses. These features are production-grade and used by large enterprise data teams.

PostHog's AI features are earlier in development. The platform has introduced AI-powered session replay summaries and basic trend analysis, but it does not yet match Amplitude's predictive analytics depth. For teams that need machine learning baked into their cohort and retention workflows today, Amplitude is the stronger platform.

Best Use Cases

Alternatives to Consider

• Mixpanel — Strong funnel analytics with simpler UX than Amplitude. Event-based pricing from 1M events free.
• Heap — Autocapture model eliminates tracking plan work. Retroactive analysis from day one without engineering instrumentation.
• FullStory — Deep session intelligence and DX analytics. Better qualitative tooling than PostHog's session replay for enterprise teams.
• Pendo — Product analytics plus in-app guidance, NPS, and roadmapping. Strong for customer-success-led SaaS orgs.
• June — Lightweight B2B product analytics built on top of Segment. Much simpler than Amplitude for small B2B SaaS teams.

Final Verdict