PostHog
Splunk
| Feature | PostHog | Splunk |
|---|---|---|
| Pricing | Free / from $0/mo | Contact sales |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.5 / 5 | 4.3 / 5 |
| Best For | developers, startups, product-teams, privacy-conscious-companies | enterprise, security-teams, devops-engineers, data-analysts |
| Founded | 2020 | 2003 |
| Product Analytics | ✓ | ✗ |
| Session Replay | ✓ | ✗ |
| Feature Flags | ✓ | ✗ |
| Experiments | ✓ | ✗ |
| Surveys | ✓ | ✗ |
| Data Warehouse | ✓ | ✗ |
| Self Hosting | ✓ | ✗ |
| Log Analysis | ✗ | ✓ |
| Real Time Monitoring | ✗ | ✓ |
| Dashboards | ✗ | ✓ |
| Alerting | ✗ | ✓ |
| Machine Learning | ✗ | ✓ |
| Siem | ✗ | ✓ |
✓ PostHog Pros
- All-in-one analytics replacing multiple tools
- Generous free tier (1M events/month)
- Self-hostable for full data control
- Feature flags and experiments built-in
✗ PostHog Cons
- Can be complex to set up properly
- Self-hosting requires infrastructure maintenance
- Less polished UI than Amplitude
✓ Splunk Pros
- Powerful search capabilities
- Real-time monitoring
- Extensive app ecosystem
- Enterprise-grade
✗ Splunk Cons
- Very expensive
- Complex pricing
- Resource-intensive
The Verdict
PostHog is built for developers and startups, with a focus on product-analytics and session-replay. Splunk targets enterprise and security teams and leads with log-analysis and real-time-monitoring.
Splunk uses custom enterprise pricing, while PostHog starts at $0/mo — a tangible advantage for teams with a fixed budget.
PostHog has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Splunk requires a paid subscription from day one.
Feature-wise, PostHog offers broader built-in capabilities (7 features vs 6), while Splunk takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.