Most comparison pages cheat. This one shows where we lose, too.
A real capability comparison — where we win and where we fall behind, both here. Keep your current tools; Gurulu adds the truth behind the number.
Each row explains what it means and why it matters. Click a row to open the rationale. On some rows Gurulu is honestly behind — we wrote those down too.
The Truth Layer core
Identity + registry + health + attribution — one layer, not four separate tools.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
One layer, four capabilities
Identity, registry, data health and attribution run on the same core — how we merge a person also explains the attribution result. Glue four separate SaaS tools together and the answers conflict; in one layer they don't.
The data model is right from day one
Every event arrives from day one with identity, session, source, confidence and consent fields — no 'oops, we forgot to collect that.' A missing field is a blind spot you can never backfill.
Answers come with a 'why', not just a chart
When we show a number we also show the identity merge, attribution rule and data quality behind it. A metric you can't explain doesn't drive decisions — it just decorates a meeting.
Explainable identity
Identity merge isn't magic — a log, a confidence score and a reversible ledger.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Explainable merge
Why we treat two records as the same person is shown step by step. A wrong merge breaks your whole funnel; if you can't see it, you can't fix it.
Confidence score
Every merge carries a 'how sure are we' score, separating certain matches from guesses. Treating a 51%-sure merge as 100% burns money.
Reversible ledger
Merges are written to an append-only ledger and can be reversed if wrong. In most tools a merge is one-way — get it wrong and the data is permanently polluted.
Attribution
We don't impose a model — you define the policy, and models sit side by side.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Customer-defined attribution policy
You set which touchpoint gets credit and how. A canned model half-fits most businesses; if you can't shape the policy, you're forced to accept the number.
Models side by side
Compare first/last/linear models on the same screen. A tool that shows a single model is selling you an assumption, not a fact.
Provenance trail (chain of evidence)
Trace end to end which events, which identity and which rule produced a conversion. Without evidence, attribution is a matter of faith, not data.
Event governance
Event = contract. No freestyle names; the registry stands at the gate.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Event = contract
Every event is defined in the registry first and the SDK generates types from it — no freestyle strings. 'buttonClick / btn_click / ButtonClicked' turns one thing into three metrics; the contract prevents that.
Validation gate
Every incoming event is sorted into Accept / Warn / Quarantine / Reject against the registry. Cleaning dirty events is the most expensive data work; stopping them at the gate is cheap.
Drift prevention (CI-enforced)
Schema changes are checked in CI; an undefined event breaks the build. In most projects the event taxonomy turns to soup within six months — contract + CI stops that.
Privacy & EU
Data in Europe, consent first, ownership yours.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
EU residency by default
Data stays in EU data centers by default — not opt-in, EU from the start. Get GDPR compliance right from day one instead of patching it later.
Consent-first
Collection gates at the event level based on consent state. Data collected without permission is legal risk plus lost trust; deleting it later is a headache.
You own your data
Export and own your data; no locked ecosystem. If your data is held hostage, the tool wins the price negotiation, not you.
Pricing & honesty
Pay as you go, transparent unit, no feature gating.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Usage-based transparency
You pay for what you use; the unit price and the meter are in plain view. An unpredictable bill makes people leave even a tool they love.
No feature gating
We don't hold features hostage for money; everything is on in Free and Pay-as-you-go alike, the only difference is volume. A locked feature stops you from evaluating the product.
Billing cap on by default
Set a spending cap; when it's hit, it stops — no surprise invoice. A traffic spike is good news — a bill spike isn't.
Experiments & testing
A/B/n testing on the same identity graph and registry — deterministic assignment, verified outcome.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
A/B/n testing
Variants are assigned by deterministic hash (server-truth, no flicker); exposure is a registry-bound event. When assignment isn't a guess, the result is trustworthy too.
Bayesian statistics
Results come as P(B>A) + a credible interval, not a magic 'winner' badge. Classic threshold-chasing p-value tests manufacture false positives.
In-product messaging
Popups, tours and personalization — rendering is a separate channel, but exposure is still a verified event.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Popup/banner
Rule-based modal/banner/slide-in with server-side XSS sanitization. Rendering = the action channel; it never blurs with observation.
Product tour
Step-by-step onboarding tour, with cross-device progress from the identity graph. The completion funnel is measured on the same core.
Personalization
Audience → content, with real impact measured via an opt-in holdout. Personalization you can't measure is a matter of faith, not a gain.
Session replay
Session recording — watching exactly what the user did.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Session recording
Visual replay of user sessions. Mature in the incumbents; on our roadmap — we say so honestly.
Error tracking
Group browser JS errors by message — same registry, same identity.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
JS error groups
Browser errors are grouped by message and, via opt-in autocapture, produce a registry-bound js_error event. An error is product behavior too, not a separate silo.
LLM analytics
Measure your own AI features — cost, latency, model performance.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
AI cost/latency
LLM calls are measured by cost, latency and errors; captured automatically via wrapOpenAI/wrapAnthropic. Your AI feature shouldn't be a blind spot.
Observability
Customer telemetry via the OTLP standard — product events and system telemetry on the same graph.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
OTLP telemetry
With the standard OpenTelemetry SDK, logs/traces/metrics stream into ClickHouse (no vendor lock). Spec is build-ready; code lands after closed beta.
Maturity & ecosystem
Let's be honest: the incumbents have been in the field for years. Here, we lose.
| Capability | Gurulu | PostHog | Amplitude | Mixpanel | GA4 | Heap |
|---|---|---|---|---|---|---|
Maturity & track record
Being a product hardened by years in production. Gurulu is new — we don't have those miles yet, and we say so honestly.
Integration breadth
Dozens of out-of-the-box third-party integrations. The incumbents have hundreds; we have the core + SDKs + a few — here we trail them.
Community & learning resources
Forums, deep docs, third-party courses. The incumbents have huge communities; our docs are young and our community small — here too we trail.
Comparison based on public information as of May 2026; competitor products evolve and this may change.
Which tool is good at what
We respect every incumbent — they each earned their spot. Here is the honest, one-paragraph take.
PostHog
Brilliant for product-led growth teams who live in funnels, feature flags and self-serve session replay. Open source roots, strong community, fast iteration. Gurulu is the source-of-truth layer underneath: pipe your events into both, let PostHog do funnels, let Gurulu do contracts, identity and attribution.
Mixpanel
Industry-standard for behavioral cohort analysis and retention reports. Mature query engine, clean UX. Gurulu sits one layer below: we reconcile the identity graph and validate the schema so that the cohorts you build on top are actually trustworthy.
GA4
Unavoidable for ad-driven marketing teams — Google integrations, geographic reach, free tier. Notoriously hard for product analytics. Gurulu acts as the EU-residency mirror plus the attribution explainer that GA4 will never give you.
Heap
Pioneer of capture-everything-rename-later. Strong autocapture and visual labeling. Gurulu's Playground borrows the picker UX, but writes into a typed registry — so the labels graduate into contracts, not free-floating strings.
Forward to PostHog, Mixpanel, Amplitude — built-in.
One ingestion endpoint. Many trusted destinations. Identity-reconciled, contract-validated, provenance-traceable.
Coming in Phase 2 · Destinations feature