PostHog vs SigNoz

Side-by-side — pricing, strengths, tradeoffs, and fit.

PostHog

Open-source product analytics with session replay, flags, and experiments.

SigNoz

Open-source, OpenTelemetry-native observability — a Datadog alternative.

At a glance

Open SourceFree TierEnterprise
● Established·From Usage-based after free tier
Open SourceFree TierEnterprise
● Established·From $0 self-hosted

Overview

One-liner

Open-source product analytics with session replay, flags, and experiments.

One-liner

Open-source, OpenTelemetry-native observability — a Datadog alternative.

Maturity

Established

Maturity

Established

Open source

✓ Yes

Open source

✓ Yes

Pricing

Free tier

✓ Available

Generous free monthly events

Free tier

✓ Available

Self-hosted free; cloud has a free trial

Starts at

Usage-based after free tier

Starts at

$0 self-hosted

Model

Usage-based

Model

Usage-based

Enterprise

✓ Available

Enterprise

✓ Available

Best for

✓ Best for

Open-source product analyticsOwn your data with a full toolkit
Teams wanting analytics + flags + replayOne platform instead of several

✓ Best for

Open-source Datadog alternativeOTel-native observability you self-host
Cost-conscious observabilityAvoid per-host SaaS pricing

Not ideal for

✕ Not for

—

✕ Not for

—

Strengths

↑ Strengths

All-in-one product analytics
Open source / self-hostable
Generous free cloud tier

↑ Strengths

OpenTelemetry-native
Open source / self-hostable
Unified metrics/traces/logs

Weaknesses

↓ Weaknesses

Self-hosting at scale needs ops
Breadth over depth in places

↓ Weaknesses

Self-hosting at scale is work
Younger than incumbents
Full PostHog profile →Full SigNoz profile →
PostHog vs SigNoz | AI Navigator