Compare · llm & agent observability
Braintrust vs Opik (Comet) pricing
At 1M traces/month, Braintrust is the cheaper list price ($36.00 vs $264).
| Braintrust | Opik (Comet) | |
|---|---|---|
| Free tier | Starter: $0/mo, 1 GB processed data and 10K scores/month, unlimited users. | Free Cloud: 25K spans/month, up to 10 team members, 60-day retention. Open source: unlimited, self-hosted. |
| Billing unit (LLM & agent observability) | GB | spans |
| First paid plan | Pro: $249/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 | Braintrust | Opik (Comet) |
|---|---|---|
| 100K | $0 Starter | $39.00 Pro Cloud |
| 1M | $36.00 Starter | $264 Pro Cloud |
| 10M | $396 Starter | $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
| Braintrust | |
|---|---|
| Starter | $0/mo 1 GB, then $4/GB; 10K scores, then $2.50/1K; $10 credits |
| Pro | $249/mo 5 GB, then $3/GB; 50K scores, then $1.50/1K; $100 credits |
| 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 |
Recent news
Sources
- Braintrust pricing page retrieved 2026-10-19
- Comet/Opik pricing page retrieved 2026-10-19