Head-to-head
51Degrees vs PostHog
Two leading analytics tools, compared on pricing, features, and editorial fit. Updated for 2026.
At a glance
| 51Degrees | PostHog | |
|---|---|---|
| Tagline | Device, IP, and visitor intelligence API for websites and platforms | The product OS for developers. |
| Pricing model | Freemium | Freemium |
| Starts at | Free | Free |
| Founded | — | 2020 |
| AI-native | ||
| Categories | Programmatic & Ad Tech, Analytics, Customer Data Platforms | Analytics |
| Vendor claimed |
Quick take
Pick 51Degrees if you need device, ip, and visitor intelligence api for websites and platforms. Pick PostHog if you need the product os for developers.
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Frequently asked
- Is 51Degrees better than PostHog?
- It depends on your use case. 51Degrees is device, ip, and visitor intelligence api for websites and platforms, while PostHog is the product os for developers. See the comparison above for which fits your team.
- What's the price difference between 51Degrees and PostHog?
- 51Degrees is free. PostHog is free.
- Can I migrate from 51Degrees to PostHog?
- Most tools in this category support data import via CSV. For complex migrations, both vendors offer onboarding assistance on higher-tier plans.