AI Data
Comet vs Snorkel AI
Two ai data tools, what each is better at, what each costs, and the one we would pick.
We rate it higher

Comet
From $19/mo
LLM observability, evaluation and ML experiment tracking
Pros
- ✓ A free tier exists for both Opik Cloud and MLOps, and the page says no credit card is required.
- ✓ Opik has a self-hostable open-source version using the same codebase as the hosted product.
- ✓ Opik Free Cloud includes up to 10 team members and 25k spans per month with 60-day retention.
Cons
- ✗ Opik Free and Pro Cloud both cap span data retention at 60 days; longer retention costs $29 per 100k spans.
- ✗ Opik Pro Cloud is limited to 50 team members and 100k spans per month.
We rate it higher

Snorkel AI
Expert data development for frontier AI models and agents
Pros
- ✓ Founded out of the Stanford AI Lab and has worked on frontier AI data for nearly a decade.
- ✓ Publishes benchmarks and research, including Terminal-Bench, Senior SWE-bench, OSWorld 2.0, and Agents' Last Exam.
- ✓ Offers both data development services and custom specialized agents.
Cons
- ✗ No public pricing; the pricing page returns a 404, so costs are only available by contacting sales.
- ✗ No self-serve product or free tier is described on the site.
| Comet | Snorkel AI | |
|---|---|---|
| From | $19/mo | Contact |
| Free Tier | Yes ✓ | No |
| Our Rating | Not rated | Not rated |
| Pricing | freemium | enterprise |
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Summary
We have not used both of these yet, so there is no score to pick a winner with. What they cost, who they suit and what each one does is in the table above.
Some links here earn us a commission. We earn it whether we praised the tool or not, which is why the verdict does not move for it.