Compare · llm & agent observability
LangSmith vs Opik (Comet) pricing
At 1M traces/month, Opik (Comet) is the cheaper list price ($264 vs $4,989).
| LangSmith | Opik (Comet) | |
|---|---|---|
| Free tier | Developer: $0, 1 seat, 5K base traces/month, then pay-as-you-go. | Free Cloud: 25K spans/month, up to 10 team members, 60-day retention. Open source: unlimited, self-hosted. |
| Billing unit (LLM & agent observability) | traces | spans |
| First paid plan | Plus: $39 / seat / mo | Pro Cloud: $19/mo |
| Pricing data | Published pricing | Published pricing |
| Company status | Active | Active |
| Open source / self-host | No / No | Yes / Yes |
| Last checked | 2026-10-19 | 2026-10-19 |
LLM & agent observability: estimated monthly cost
| traces / month | LangSmith | Opik (Comet) |
|---|---|---|
| 100K | $489 Plus (1 seat) | $39.00 Pro Cloud |
| 1M | $4,989 Plus (1 seat) | $264 Pro Cloud |
| 10M | $49,989 Plus (1 seat) | $2,514 Pro Cloud |
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
| LangSmith | |
|---|---|
| Developer | $0 / seat Max 1 seat, 5K base traces/mo |
| Plus | $39 / seat / mo 10K traces included, then 0.005 LSU ($0.005) per additional base trace |
| Enterprise | Contact sales |
| Opik (Comet) | |
|---|---|
| Open Source | $0 Self-host |
| Free Cloud | $0 25K spans/mo |
| Pro Cloud | $19/mo 100K spans, then $5/100K spans; extra retention $29/100K spans |
| Enterprise | Contact sales |
Sources
- LangSmith pricing page retrieved 2026-10-19
- Comet/Opik pricing page retrieved 2026-10-19