Compare · llm & agent observability
Langfuse vs PostHog pricing
At 1M traces/month, PostHog is the cheaper list price ($450 vs $451).
| Langfuse | PostHog | |
|---|---|---|
| Free tier | Hobby: 50K units/month free, no credit card. Self-hosting the MIT-licensed core is free. | 1M analytics events, 5K session recordings, 100K AI-observability events, 1M feature-flag requests per month (resets monthly). |
| Billing unit (LLM & agent observability) | units | AI events |
| First paid plan | Core: $29/mo | Pay-as-you-go: $0 base + usage |
| Pricing data | Published pricing | Published pricing |
| Company status | Acquired | Active |
| Open source / self-host | Yes / Yes | Yes / Yes |
| Last checked | 2026-10-19 | 2026-10-19 |
LLM & agent observability: estimated monthly cost
| traces / month | Langfuse | PostHog |
|---|---|---|
| 100K | $69.00 Core | $68.00 Pay-as-you-go |
| 1M | $451 Core | $450 Pay-as-you-go |
| 10M | $3,931 Core | $3,930 Pay-as-you-go |
Estimate, check vendor page. Figures are list prices computed from publicly posted pricing on the "last checked" date. They exclude taxes, discounts, add-ons, seats and contract terms unless stated. Always confirm on the vendor's own pricing page.
Plans side by side
| Langfuse | |
|---|---|
| Hobby | $0 50K units/month |
| Core | $29/mo 100K units included, then $8/100K (lower with volume) |
| Pro | $199/mo 100K units included, same unit rates |
| Teams add-on | $300/mo |
| Enterprise | $2,499/mo |
| PostHog | |
|---|---|
| Free | $0 Usage stops at free-tier limits. |
| Pay-as-you-go | $0 base + usage Per-product graduated rates above the free allowance; billing limits per product. |
Recent news
Sources
- Langfuse pricing page retrieved 2026-10-19
- PostHog pricing page retrieved 2026-10-19
- PostHog pricing data (page-data JSON) retrieved 2026-10-19