Mixpanel vs PostHog

Choose the operating model before choosing the dashboard

Mixpanel and PostHog both collect events, but they ask different people to own meaning. Mixpanel is comfortable when a product manager, analyst or growth lead starts with a business question, builds a funnel or retention report, and uses a shared vocabulary to explain the result. Its Lexicon is useful for a B2B company where “activated workspace” and “qualified account” need descriptions that survive team changes. The trade-off is that release controls and replay are usually separate decisions. '} />

PostHog is a broader operating suite. An engineer can instrument an event, turn on a flag for one cohort, inspect a recording and connect the exposure to an experiment in the same product family. Its open-source option also appeals to teams that need to control deployment. The trade-off is organizational: someone must maintain the event dictionary, identity model, query library, flag expiry and usage budgets. A flexible raw stream becomes confusing when no one is accountable for its vocabulary.

Run a short decision workshop with one PM, one engineer and the person who owns reporting. Give them a single question such as “why did workspace activation fall after the billing change?” If the PM can answer it in Mixpanel while keeping the definition legible, Mixpanel is the safer default. If the engineer needs to connect a release flag, replay and experiment exposure without a chain of vendors, PostHog is the safer default.

Worked scenario: 12 million monthly events

Consider a B2B SaaS with 8,000 monthly active users, 12,000,000 product events per month and 300,000 identified-user events inside that total. It has four engineers, two product managers and one data analyst. It needs account-level activation reporting, replay for support investigations, feature flags for staged releases, and two experiments each quarter. The company also wants a warehouse copy for finance and customer success. This scenario makes the arithmetic visible; it is not a vendor quote.

The Mixpanel pricing page lists Growth at $120 per month when billed annually for up to 20M monthly events, or $140 per month on a monthly plan. The annual-billing arithmetic is 12 × $120 = $1,440 per year. The monthly-billing arithmetic is 12 × $140 = $1,680 per year. The first 1M events are included in either view, so the 12M workload sits inside the stated 20M Growth band. Add the cost of a separate replay or flag product if those are required, then confirm group analytics and warehouse export terms with Mixpanel.

The PostHog pricing page lists the first 1M analytics events free each month. If the remaining 11M events were all charged at the published 2–15M base rate, the simple base calculation would be 11,000,000 × $0.0000343 = $377.30 per month. That is not the complete bill: identified events can add person-profile charges, and recordings, flag requests, experiments and warehouse rows have their own allowances. If all 300,000 identified events remain below the first 1M person-profile allowance, the profile line is $0 for that month. Set a product-level billing limit and model the exact anonymous/identified split in PostHog’s calculator before relying on the base arithmetic.

The staffing arithmetic matters as much as the dollar arithmetic. Mixpanel leaves engineers free to maintain flags elsewhere while the analyst owns definitions and reports. PostHog can remove separate integrations, but the four engineers inherit responsibility for SDKs, identity, flag cleanup, limits and possibly infrastructure. For this workload, choose Mixpanel if the reporting owner is the scarce resource and the team already has release tooling. Choose PostHog if reducing vendor boundaries is worth assigning an engineer to the operating controls.

Entry-plan boundaries and governance questions

Mixpanel Free is attractive for an early product because the listed allowance is 1M monthly events at $0. The decision changes when the product grows toward the 20M event band: Growth is $120 per month when billed annually or $140 monthly, and the team should decide whether a predictable plan is preferable to rebuilding instrumentation. Ask which history, group analytics, access controls and export options are included before treating the headline event limit as the whole product.

PostHog’s free allowances are broader in product count but separate by meter. The published list includes 1M analytics events, 5K recordings, 1M flag requests, 1,500 survey responses and 1M warehouse rows each month. Usage stops at free limits, which protects a small team from an unexpected bill but can also drop new events if a limit is reached. Paid plans list seven years of event retention versus one year on free, while recordings have their own retention window. Write those boundaries into the rollout plan.

Governance should be a written workflow, not a slide in the procurement deck. Name the event owner, the person who approves a metric used in board reporting, the retention period for recordings, the process for deleting a customer, and the owner for flag expiry. In Mixpanel, use Lexicon to make those definitions discoverable. In PostHog, create a query library and code-review rule for event changes. Reconcile one activation metric against a warehouse export in both pilots so a clean dashboard is not mistaken for a trustworthy definition.

Integrations, privacy and deployment

A B2B identity model has more edges than a consumer demo. Several people can share a workspace, a person can move between accounts, and a parent company can own many workspaces. Send the same user, account and subscription-change sequence to each platform. Check merges, deletes, late events and a plan downgrade. The platform that looks easier with one user can become harder to govern when account joins are implicit.

Mixpanel is the better fit when a central product analytics owner wants cloud delivery and a focused event workspace. Keep the exposure event from the existing flag service stable, and send experiment assignment and outcome events with a shared identifier. Ask procurement to document region, retention, export, access and deletion terms rather than assuming the dashboard answers those questions.

PostHog lists US (Virginia) and EU (Frankfurt) cloud regions and an MIT-licensed open-source product. Cloud is simpler when the security requirement is a selectable region. Self-hosting is a genuine operating commitment: the customer owns upgrades, monitoring, backups, capacity, deletion jobs and incident response. Platform packages can add SSO, audit logs, custom roles and project permissions. Put those controls beside the engineering estimate, not in a footnote.

Migration from Mixpanel to PostHog

Export Mixpanel’s event dictionary, Lexicon descriptions, cohorts, funnels, retention reports, group definitions and warehouse jobs before changing the SDK. Mark the five metrics leadership relies on and write their exact filters. Map each event to a PostHog name and decide which raw autocapture interactions should remain exploratory. Recreate identity and group rules in staging, then compare counts for one complete reporting cycle.

The migration is also a release-process decision. Rebuild flags, experiment assignments and replay permissions only after identity is stable. If historical data cannot be reproduced in the new model, keep the old reports read-only and label the boundary date. Set limits for analytics, profiles, recordings, flags and warehouse rows before production. Train PMs on saved insights and engineers on HogQL, deletion and flag expiry.

1. Inventory events, properties, Lexicon definitions, cohorts, account IDs, reports and exports.
2. Choose five business-critical metrics and document owner, filters, retention and account join.
3. Run both SDKs in staging; compare identity merges, event counts and late-event behavior.
4. Recreate one flag rollout and one experiment, then reconcile exposure and outcome events.
5. Set PostHog product limits and keep Mixpanel read-only through one full reporting cycle.
6. Archive old queries only after the new definitions match the agreed warehouse check.

Migration from PostHog to Mixpanel

Export PostHog event names, properties, groups, HogQL queries, cohorts, feature-flag exposure data, experiment assignments, recording policy and warehouse destinations. Translate the queries that matter to PMs into Mixpanel reports and preserve the original query text for audit. Decide which PostHog products need replacements: flags, replay, surveys and experiments may require separate services or a narrower workflow.

Start Mixpanel with explicit events for activation, billing change, invitation, key feature use and cancellation. Use a parallel period to compare user and account counts. Give the analyst ownership of Lexicon, while engineering owns SDK upgrades and any replacement flag integration. Keep PostHog available for historical replay and flag context until support and product teams have completed a reporting cycle in Mixpanel.

1. Export the PostHog taxonomy, HogQL, cohorts, groups and product configuration.
2. Select the five reports that must survive and rewrite their filters in Mixpanel.
3. Instrument a parallel staging flow and compare users, accounts and key events.
4. Choose replacement tools for flags, replay and surveys if they remain requirements.
5. Publish Lexicon definitions and train PMs on funnels, retention and breakdowns.
6. Keep PostHog read-only until warehouse and dashboard counts reconcile.

Questions to ask before signing

• For Mixpanel, which event history, group analytics, exports, permissions and governance features are included in Growth versus Enterprise?
• For PostHog, which free allowance and retention rule applies to every product you plan to enable?
• Can the platform represent a user who belongs to several workspaces and a parent account with many workspaces?
• Who owns the event dictionary, metric approval, recording retention, deletion requests and flag expiry?
• What happens when a monthly event, recording or flag allowance is reached: pause, drop, throttle or overage?
• Does security require EU cloud storage, self-hosting, SSO, audit logs, custom roles or a documented backup process?