Comet ML vs Heron: Which is Better in 2026?
Choosing between Comet ML and Heron comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Comet ML
Machine learning experiment tracking platform
Best for you if:
- • You need analytics features specifically
- • Comet ML is an experiment tracking platform for machine learning teams
- • It logs metrics, parameters, and artifacts automatically to compare and reproduce experiments
Heron
Observe AI agent and LLM API network traffic without code changes
Best for you if:
- • You want to try before committing
- • You need AI agents features specifically
- • Passively monitors AI agent and LLM API performance from network traffic.
- • Reconstructs multi-call agent interactions into complete narratives.
| At a Glance |  Comet ML |  Heron |
|---|---|---|
Starts at | $19/month per userPro | FreeFree tier available |
Best For | Analytics | AI Agents |
Rating | 4.3/5 | - |
Free plan | No | Yes |
Choose Comet ML or Heron?
Choose Comet ML if
Machine learning experiment tracking platform
- Experiment tracking
- Model production monitoring
- Good visualizations
- Your work is analytics-shaped, not AI agents-shaped
Choose Heron if
Observe AI agent and LLM API network traffic without code changes
- Zero intrusion: No SDK changes, proxies, or modifications to observed workloads required.
- Comprehensive observability: Reconstructs full agent narratives from raw network data.
- Valuable for fine-tuning: Exports real agent traffic into usable fine-tuning datasets.
- Your work is AI agents-shaped, not analytics-shaped
| Feature | Comet ML | Heron |
|---|---|---|
| Pricing Model | Paid | Freemium |
| User Rating | ★4.3/5 24 reviews | No ratings yet |
| Categories | AnalyticsData Visualization | AI AgentsAnalytics |
In-Depth Analysis
Comet ML
Machine learning experiment tracking platform
Strengths
- +Experiment tracking
- +Model production monitoring
- +Good visualizations
- +Fair pricing
- +LLM support
Weaknesses
- -Less known
- -Smaller community
- -Some features basic
- -Documentation gaps
- -Integration limitations
Key features
Value 85/100. Comet ML's pricing is quite generous, especially with a robust Free tier offering 100GB storage and core tracking.
Watch out: Overage fees for training hours on Pro tier
Heron
Observe AI agent and LLM API network traffic without code changes
Strengths
- +Zero intrusion: No SDK changes, proxies, or modifications to observed workloads required.
- +Comprehensive observability: Reconstructs full agent narratives from raw network data.
- +Valuable for fine-tuning: Exports real agent traffic into usable fine-tuning datasets.
- +Flexible deployment: Can analyze `.pcap` files or live network interfaces.
- +Detailed metrics: Provides granular performance data for AI agent interactions.
Weaknesses
- -Requires traffic decryption: Needs to be installed where traffic is already plaintext or use eBPF for encrypted traffic.
- -Lacks cross-cluster client tracing: Focuses on passive evidence chain rather than distributed tracing.
- -Linux-specific features: Experimental eBPF source is Linux-only.
Key features
Value 85/100. This pricing structure is generous, especially with the robust Free tier offering unlimited repositories and decent CI/CD minutes.
Watch out: CI/CD minutes beyond included amounts
Pricing: Comet ML vs Heron
| Plan | Comet ML | Heron |
|---|---|---|
| Tier 1 | Free | $0 USD per month Free |
| Tier 2 | $19 month per user Pro | $4 USD per user/month Team |
| Tier 3 | custom Enterprise | Starting at $21 USD per user/month Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Comet ML pricing and Heron pricing.
Who Should Use What?
On a budget?
Heron has a free tier. Comet ML is paid only.
Go with: Heron
Want the highest-rated option?
Comet ML is rated 4.3/5. Heron has no ratings yet.
Go with: Comet ML
Value user reviews?
Comet ML: 24 reviews (4.3/5). Heron: no ratings yet.
Go with: Comet ML
3 Questions to Help You Decide
What's your budget?
Comet ML is paid. Heron is freemium. Heron lets you start free.
What's your use case?
Comet ML is a analytics tool. Heron is in AI agents. Pick the category that matches your needs.
How important are ratings?
Comet ML is rated 4.3/5; Heron has no ratings yet.
Key Takeaways
Comet ML
- Our pick for this comparison
Heron
- Has a free tier
- Better fit for AI agents
The Bottom Line
Comet ML is our pick. Heron has a free tier if you want to test without paying.
Frequently Asked Questions
Is Comet ML or Heron better?
Comet ML is rated in our evaluation. Comet ML is paid and Heron is freemium.
What are Comet ML and Heron used for?
Comet ML: Machine learning experiment tracking platform. Heron: Observe AI agent and LLM API network traffic without code changes.
What does Comet ML cost vs Heron?
Comet ML is a paid tool. Heron is freemium (free tier + paid plans). Visit their websites for detailed pricing.