Comet ML pricing guide details
Pricing Overview
Comet ML operates a freemium pricing model across two product lines: Opik for LLM observability and evaluation, and Comet MLOps for traditional experiment tracking. The platform offers four distinct tiers, starting with a fully open-source self-hosted option at $0 and scaling through Free Cloud, Pro Cloud at $19 per month, and a custom-priced Enterprise tier. What makes Comet's pricing notable is the genuine open-source path -- the self-hosted version runs the exact same codebase as the hosted product, giving teams a no-cost entry point without feature gating. For teams that prefer managed infrastructure, the Free Cloud tier supports up to 10 members with 25,000 spans per month, which is generous enough for early-stage projects. The Pro tier at $19 per month unlocks expanded usage for growing teams, making Comet one of the more affordable MLOps platforms on the market.
Plan Comparison
Comet ML structures its cloud pricing around team size, span volume, and data retention. Here is how the four tiers compare across key dimensions:
| Feature | Open Source | Free Cloud | Pro Cloud | Enterprise |
|---|---|---|---|---|
| Price | $0 (self-hosted) | $0 | $19/month | Custom quote |
| Team Members | Unlimited (self-managed) | Up to 10 | Up to 50 | Unlimited |
| Monthly Spans | Unlimited (self-managed) | 25,000 | 100,000 | Custom |
| Data Retention | Unlimited (self-managed) | 60 days | 60 days (customizable) | Custom |
| LLM Tracing & Analysis | Yes | Yes | Yes | Yes |
| Datasets & Experiments | Yes | Yes | Yes | Yes |
| LLM-as-a-Judge Metrics | Yes | Yes | Yes | Yes |
| Agent Optimizer Suite | Yes | Yes | Yes | Yes |
| Custom Span Limits | N/A | No | Yes | Yes |
| Custom Retention Periods | N/A | No | Yes | Yes |
| SSO / SAML | No | No | No | Yes |
| SOC 2, HIPAA, GDPR | No | No | No | Yes |
| Dedicated Support & SLAs | No | No | No | Yes |
| Service & View-Only Accounts | No | No | No | Yes |
The Pro Cloud tier is the sweet spot for most small-to-mid-size teams. It quadruples the span allowance over Free Cloud and adds the flexibility to customize both span limits and retention windows. Enterprise is where Comet gates its security and compliance features -- SSO, SOC 2, ISO 27001, ISO 9001, HIPAA, and GDPR compliance all require a custom contract.
Hidden Costs and Considerations
The 60-day data retention on both Free and Pro Cloud tiers is a meaningful constraint. If your team needs to reference experiments or traces beyond two months, you will either need to export data regularly or negotiate a longer retention window on the Pro tier. The 50-member cap on Pro Cloud means any organization with multiple ML squads will likely be pushed toward Enterprise pricing. Self-hosting eliminates these limits but shifts the operational burden to your infrastructure team -- plan for database management, backups, and upgrade cycles.
Cost Estimates by Team Size
Because Comet ML prices at the account level rather than per-seat, the cost structure scales favorably for small and mid-size teams:
| Team Size | Recommended Tier | Monthly Cost | Annual Cost | Cost Per User |
|---|---|---|---|---|
| Solo developer | Free Cloud | $0 | $0 | $0 |
| Small team (5 users) | Pro Cloud | $19 | $228 | $3.80/month |
| Mid-size team (20 users) | Pro Cloud | $19 | $228 | $0.95/month |
| Large team (50+ users) | Enterprise | Requires a custom quote | Requires a custom quote | Varies |
The flat $19 per month on Pro Cloud is remarkably cost-effective. A 20-person team pays under $1 per user per month, which undercuts nearly every competitor in the MLOps space. The catch is that teams exceeding 50 members or needing compliance features must move to Enterprise, where pricing is negotiated and typically involves annual commitments.
How Comet ML Pricing Compares
Comet ML positions itself as the budget-friendly option in the MLOps platform market, and the numbers back that up. Weights & Biases charges $60 per month for its Pro tier, more than triple Comet's $19 per month. ClearML offers an open-source foundation similar to Comet but has less transparent cloud pricing. Here is how the three platforms stack up:
| Tool | Pricing Model | Starting Price | Best For |
|---|---|---|---|
| Comet ML | Freemium + Open Source | $0 (Free), $19/month (Pro) | Cost-conscious teams needing both LLM evaluation and ML experiment tracking |
| Weights & Biases | Freemium | $0 (Free), $60/month (Pro) | Teams wanting a mature ecosystem with extensive integrations |
| ClearML | Freemium + Open Source | $0 (Free), $15/month (Pro) | Teams prioritizing full pipeline orchestration alongside experiment tracking |
We consider Comet ML the strongest value proposition for teams that need both traditional ML experiment tracking and modern LLM observability in a single platform. The open-source Opik option is a genuine differentiator -- it runs the same codebase as the cloud version, not a stripped-down community edition. Teams that can self-host effectively get an enterprise-grade evaluation platform at zero licensing cost. For cloud-hosted usage, the flat $19 per month Pro tier is hard to beat, especially for teams between 5 and 50 members where the per-user economics are exceptional.