Mixpanel Alternatives for Startups in 2026: PostHog, Amplitude, Heap, GA4, and June Compared

Every "Mixpanel alternatives" list on the internet names the same five tools and then never says what any of them actually cost or who should pick which one. This one does the math a team actually needs before a renewal conversation: live free-tier limits, what each vendor bills on, and — more usefully — which of the five is the right move for a given team shape, versus which one is just a different flavor of the same bill Mixpanel already sends.

The short version: these five tools split into two real categories. PostHog, Amplitude, and Mixpanel itself are usage-based, event-first product analytics platforms that compete almost entirely on free-tier size and per-unit rate. Heap and June are not really competing on price at all — Heap sells an autocapture model with no public numbers, and June sells company-level B2B analytics to teams that have already outgrown the "which analytics tool" question. Picking the wrong category, not the wrong vendor, is where most Mixpanel migrations go sideways.

Quick Decision

If the team's monthly event volume is under 1M and Mixpanel's dashboards already fit the workflow, staying put is a legitimate answer — migrating for its own sake is a wasted quarter. If the team wants feature flags, session replay, and surveys folded into the same bill as analytics, PostHog is the only one of the five that bundles all four. If the team just wants the biggest free runway before any invoice shows up, Amplitude's 2M-event free tier beats Mixpanel's and PostHog's 1M-event tiers by a factor of two. Heap and June are answers to a narrower question — "should we even be comparing on price" — not drop-in Mixpanel replacements.

What Each Mixpanel Alternative Actually Costs and Includes

Mixpanel itself: the baseline everyone is measuring against

Before comparing alternatives, it's worth restating what the tool being replaced actually charges. Mixpanel's Free plan is capped at 1,000,000 monthly events, up to five saved reports, and 10,000 monthly session replays, with no credit card required. The Growth plan removes the report cap and adds unlimited reports, behavioral cohorts, and campaign reporting; past the shared 1M-event allowance it bills roughly $0.28 per 1,000 events, according to Mixpanel's own pricing page, with volume discounts kicking in at higher usage before Enterprise moves to fully custom pricing with unlimited events, HIPAA tooling, and a dedicated account manager. Mixpanel also runs a startup program giving eligible early-stage companies — founded under five years ago with $8M or less in funding — their first year free on Mixpanel's Startup Plan, a distinct named offer on the pricing page that Mixpanel does not describe inside its standard Free/Growth/Enterprise comparison table, so its exact feature parity with Growth is not documented. That startup-program detail alone reverses the calculus for a lot of teams: a startup that qualifies may find staying on Mixpanel cheaper than switching to anything on this list for the next twelve months.

PostHog: the bundle, priced per product

PostHog does not sell seat-based tiers at all. Every product inside the platform — product analytics, session replay, feature flags and experiments, surveys, error tracking, data warehouse — has its own monthly free allowance and its own pay-as-you-go rate ladder, and every plan includes unlimited team members. As of this check, the free allowances are 1,000,000 analytics events, 5,000 session replay recordings, 1,000,000 feature-flag requests, and 1,500 survey responses per month, each resetting monthly. Past those limits, analytics events start at $0.00005 per event and drop to roughly $0.000009 at very high volume; session replay starts at $0.005 per recording and is priced roughly two orders of magnitude higher per unit than analytics events, which is the detail most teams miss when they model PostHog's bill. ToolPick's own PostHog pricing deep-dive runs three seat-scale scenarios through PostHog's actual rate card if a team wants the full math before switching; the PostHog review covers the feature and workflow side of the same decision.

Amplitude: the largest free tier, then custom pricing

Amplitude's Free plan covers 2,000,000 events per month indefinitely with no credit card required, plus 10,000 monthly session replays — the largest published free allowance of any tool in this comparison. The Plus plan starts at $0 and scales with usage up to roughly 70M events, adding custom events, formulas, up to 20 behavioral cohorts, alerts, heatmaps, and two-year data retention. Growth and Enterprise move to fully custom, event-volume-based pricing with expanded session-replay allowances (20,000 and 50,000 recordings respectively) and, at Enterprise, unlimited projects and role-based access control. Amplitude also runs a startup scholarship offering a free year on the Growth plan for companies under $10M in funding and 20 employees — worth checking before assuming the public price applies. ToolPick's Amplitude alternatives brief covers the reverse direction, for teams evaluating Amplitude itself against the rest of this list.

Heap: autocapture, priced after you install it

Heap's Free plan is capped at 10,000 monthly sessions (not events) with six months of data history — a genuinely different unit of measurement than every other tool here, because Heap's core pitch is autocapturing every interaction instead of requiring manual event instrumentation. Past Free, Heap does not publish a number: the Growth tier's own pricing page tells teams to install the free tracking snippet first to get a usage-based estimate, and both Pro and Premier are listed only as custom, session-based pricing negotiated after that. That is a real buying-decision fact, not an omission on ToolPick's part — a team cannot budget for Heap without first installing its tracker or booking a call, which is a meaningfully higher-friction evaluation path than checking a rate card.

June: company-level analytics for post-PMF B2B SaaS

June does not publish tiered pricing at all. Its pricing page positions the product as an all-in-one company- and product-analytics tool for B2B SaaS, with Salesforce, HubSpot, and Attio integrations, computed customer traits, and SQL/AI-driven custom insights — and its own FAQ says outright that June fits companies with at least roughly $1M in ARR, pointing earlier-stage teams toward cheaper tools instead. June is best understood as a different product category wearing "Mixpanel alternative" search-intent clothing: it answers which accounts are at risk and which companies are expanding usage, not which button a given user clicked, which is Mixpanel's home turf.

GA4: free forever, built for marketing first

Google Analytics 4 is free with no seat count and no published event-volume price tier for the standard property. Official limits are looser than most teams assume: there is no cap on distinctly named events for web data streams, and the practical ceiling is 100,000 events per user per day. The real constraint most product teams hit is data retention, not volume — standard GA4 properties cap event-level data (the kind exploration and funnel reports query) at a maximum of 14 months, while Analytics 360 extends that to 26–50 months. Standard aggregated reports are not affected by this setting, only ad hoc exploration and funnel analysis. GA4 also remains, structurally, a marketing-attribution tool retrofitted for product events — teams that copy a Mixpanel-style event taxonomy directly into GA4 tend to get messier reports than teams that model events GA4's way from the start.

Free-Tier Comparison at a Glance

The three tools that price in the same unit — events — line up cleanly against each other. Heap (sessions), June (no public tier), and GA4 (no hard event cap) are not directly comparable on this axis, which is itself useful information about how differently those three price.

The pattern worth internalizing: a bigger free-tier number does not automatically mean a cheaper bill at real scale. Amplitude's 2M-event free tier is double Mixpanel's and PostHog's, but Amplitude's paid tiers move to fully custom pricing sooner than PostHog's published rate card does, so a team that will definitely outgrow the free tier within a year should ask Amplitude for Growth-tier numbers before assuming the free-tier size settles the decision.

Who Should Pick Which Tool

• Stay on Mixpanel if the team is comfortably inside the 1M-event free tier or Growth-plan pricing, the existing dashboards and cohort tooling already fit the workflow, and nothing about the current bill or feature set is the actual complaint. Switching cost is real; only pay it for a real problem.
• Move to PostHog if the team wants feature flags, session replay, and surveys billed alongside analytics instead of as three or four separate subscriptions, and is comfortable owning usage discipline — billing limits, replay sampling — in exchange for not paying per seat.
• Move to Amplitude if the priority is the largest possible free runway with the least setup friction, especially for an early-stage team not yet sure how deep its analytics needs will get.
• Consider Heap only if the product genuinely benefits from autocapture (a marketing site or transactional flow with many UI elements nobody wants to manually instrument) and the team is willing to install first, price second.
• Consider June only if the team is a B2B SaaS company past roughly $1M ARR that needs company-level (account) analytics and CRM-integrated customer health signals — not a general Mixpanel replacement for product event tracking.
• Fall back to GA4 when the honest answer is that the team cannot yet justify any analytics line item at all, understanding that raw event-level data expires within 14 months and the tool is fundamentally built for marketing attribution first.

For a broader category view beyond these five, ToolPick's best product analytics tools comparison and the analytics tools decision hub both cover additional entrants side by side.

Where a Migration Goes Wrong

Three mistakes show up repeatedly in teams that switch off Mixpanel without modeling the move first:

1. Copying the event firehose, not the event strategy. Moving the same uncapped track() call volume straight into PostHog or Amplitude without setting billing limits or sampling session replay is the single fastest way to turn a "we're saving money" migration into a bill shock. This is exactly the failure mode ToolPick's PostHog pricing guide walks through in detail — the fix is setting limits before enabling replay or flags broadly, not after the first surprise invoice.
2. Assuming Heap's autocapture replaces manual instrumentation for free. Heap captures interactions automatically, but that changes the shape of the data — historical Mixpanel event history does not carry over, and teams typically need a parallel-run period before trusting Heap's reports for decisions that used to run on Mixpanel data.
3. Reusing a Mixpanel event taxonomy inside GA4 verbatim. GA4's event model, parameter limits (25 per event), and retention rules are different enough from Mixpanel's that a literal port produces confusing reports. Teams that get value from GA4 for product analytics generally rebuild the event schema around GA4's conventions rather than translating Mixpanel's one-to-one.

Bottom Line

There is no single best Mixpanel alternative in 2026 — there are two different buying decisions wearing the same search query. If the question is "which usage-based, event-priced tool should replace Mixpanel," it comes down to PostHog for bundled flags/replay/surveys or Amplitude for the largest free runway, both genuinely comparable to Mixpanel on the same event-volume terms. If the question is actually "we need something Mixpanel was never built for," Heap and June answer that instead — autocapture-first tracking and company-level B2B analytics, respectively — and GA4 answers it for teams that need the line item to be exactly $0.

Related ToolPick Decisions

• PostHog Pricing 2026: What Usage-Based Pay-As-You-Go Actually Costs — The full seat-scale cost model for the alternative most directly comparable to Mixpanel's own usage-based Growth plan.
• PostHog Review 2026 — Feature and workflow fit, independent of pricing.
• Best Product Analytics Tools in 2026 — A wider shortlist beyond the five compared here.
• Amplitude Alternatives for Product Analytics in 2026 — The reverse comparison, for teams starting from Amplitude instead of Mixpanel.
• PostHog on the ToolPick Alternatives Hub — The structured decision-page view of the same tool.