PostHog vs Polar
Open source product analytics — all-in-one dev tool
vs. Merchant of Record for devs — usage-based billing, MoR, 4% + 40¢
Pricing tiers
PostHog
Free (generous)
No credit card. Each product has its own free monthly quota. Great for startups + OSS.
Free
Paid (usage-based)
Pay only what you use, after free quotas. Volume discounts at higher tiers. 6 projects, 7-year retention.
$0 base (usage-based)
Self-Hosted (OSS)
MIT-licensed. Run on your own infra via Docker/k8s. Zero vendor lock-in.
$0 base (usage-based)
Enterprise
Custom. SAML SSO, dedicated CSM, custom SLA.
Custom
Polar
Pay-as-you-go
4% + 40¢ per transaction. Cheapest Merchant-of-Record. No monthly or setup fees.
$0 base (usage-based)
Enterprise
Custom. Volume discounts for high-growth teams.
Custom
Free-tier quotas head-to-head
Comparing free on PostHog vs payg on Polar.
| Metric | PostHog | Polar |
|---|---|---|
| data warehouse rows | 1000000 rows/month | — |
| error tracking exceptions | 100000 exceptions/month | — |
| feature flags requests | 1000000 requests/month | — |
| llm analytics events | 100000 events/month | — |
| logs gb | 50 GB/month | — |
| product analytics events | 1000000 events/month | — |
| projects | 1 projects | — |
| retention years | 1 year | — |
| session replay recordings | 5000 recordings/month | — |
| surveys responses | 1500 responses/month | — |
| team members | unlimited members | — |
Features
PostHog · 14 features
- A/B Testing — Experiments with significance analysis.
- Data Pipelines — Export events to BigQuery, Snowflake, S3.
- Data Warehouse — Query external sources (Stripe, Hubspot, S3) alongside events with SQL.
- Error Tracking — Sentry-style error tracking in same platform.
- Feature Flags — Rollout flags with targeting, A/B testing, JSON payloads.
- LLM Analytics — Tracing + cost tracking for OpenAI, Anthropic, Gemini, etc.
- Logs — Centralized log ingest with free 50 GB/month.
- Product Analytics — Events, funnels, trends, retention, paths. SQL insights available.
- Revenue Tracking — Integration with Stripe for revenue + churn metrics.
- Self-Hosting — Docker/Helm. Full feature parity with cloud.
- Session Replay — Watch user sessions. Privacy controls, masked inputs, JS errors.
- SQL Query API — Run ClickHouse SQL over your events via API.
- Surveys — In-app surveys + feedback widgets.
- Workflows — Trigger emails/webhooks on events.
Polar · 15 features
- Customer Portal — Self-serve subscription management.
- Feature Flags — Simple flag mgmt tied to subscription tiers.
- Framework Adapters — Next.js, BetterAuth, TS, Python, Laravel, Ruby, 11+ more.
- Fraud Protection — Chargeback + fraud handling included.
- GitHub Sponsors Import — Import existing sponsors to Polar.
- Global Tax Compliance — VAT/GST/sales tax filed by Polar.
- Hosted Checkout — Polar-hosted + embeddable checkout.
- License Keys — Generate + validate license keys for software.
- Metering — Track API calls, tokens, custom units.
- One-off Purchases — Single purchases + digital downloads.
- Open-Source Backend — Full platform code on GitHub.
- Sandbox Environment — Test transactions without charging.
- Subscriptions — Tiered plans with upgrades/downgrades.
- Usage-Based Billing — Event ingestion → meter → invoice.
- Webhooks — Resource events with HMAC signatures.
Developer interfaces
| Kind | PostHog | Polar |
|---|---|---|
| SDK | posthog-android, posthog-flutter, posthog-go, posthog-ios (Swift), posthog-js, posthog-node, posthog-php, posthog-python, posthog-react-native, posthog-ruby | polar-sdk-python, @polar-sh/better-auth, @polar-sh/nextjs, @polar-sh/sdk |
| REST | PostHog REST API | Polar REST API |
| MCP | PostHog MCP | Polar MCP |
| OTHER | Webhooks + Actions | Polar Checkout, Polar Webhooks |
Staxly is an independent catalog of developer platforms. Some links to PostHog and Polar may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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