Machine Learning · head to head
Comet ML vs Humanloop
Comet ML
Machine Learning
Platform for tracking, comparing, and optimizing ML experiments
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Comet ML the free cloud tier caps data at 25,000 spans a month with 60 day retention; Humanloop no published pricing for standard plans; customers must contact sales for quotes
Where they differ
Only the attributes on which Comet ML and Humanloop actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Comet ML
- Experiment tracking
- Code versioning
- Model registry
- Hyperparameter optimization
- Production monitoring
- PyTorch
- TensorFlow
- Keras
Only in Humanloop
Nothing recorded that Comet ML does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
Comet ML
- LLM observability and monitoringnot Humanloop
- AI agent testing and debuggingnot Humanloop
- Experiment tracking for machine learningnot Humanloop
- Model registry and version managementnot Humanloop
- ML model training monitoringnot Humanloop
Humanloop
- LLM prompt management and evaluationnot Comet ML
- AI workflow automation and testingnot Comet ML
- Model monitoring and logging at scalenot Comet ML
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Comet ML
- The free cloud tier caps data at 25,000 spans a month with 60 day retention
- Retention stays at 60 days even on the paid Pro plan, and extending it is a $29 per 100k spans add on
- Overage on Pro is $5 per additional 100,000 spans
- The free MLOps tier is a single user with 100 GB of storage and training hours governed by a fair usage policy
- Pro MLOps is $19 per user per month and caps the team at 10 users
Humanloop
- No published pricing for standard plans; customers must contact sales for quotes
- Billing based on logs created per API call, making costs unpredictable without usage estimates
- Separate charges apply from AI providers (OpenAI, Anthropic, etc.) using customer's own API keys, adding external costs
Pricing, plan by plan
Comet ML
Free- Free CloudFree
- Up to 10 team members
- 25,000 spans per month
- 60-day data retention
- Pro Cloud$19/month
- Up to 50 team members
- 100,000 spans per month
- 60-day data retention
- MLOps FreeFree
- 1 user with fair usage policy
- Experiment tracking
- Dataset management
- MLOps Pro$19/user/month
- Up to 10 users
- 1,500 training hours included
- 500GB storage included
Humanloop
Free- Free TrialFree
- 2 members
- 50 evaluation runs
- 10,000 logs per month
- Startup Program$null/contact-sales
- Tailored pricing for early-stage, VC-backed startups
- Enterprise$null/contact-sales
- Custom pricing
- SSO + SAML authentication
- Role-based access controls
Which should you pick?
Choose Comet ML if
- You need experiment tracking.
- You want to start without paying.
- You work on Web, Linux, Mac, Windows.
- You also want code versioning.
Questions people ask
- Is Comet ML or Humanloop better?
- Neither clearly leads. Comet ML starts at Free and Humanloop at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Comet ML or Humanloop?
- Comet ML starts at Free and Humanloop at Free.
- Does Comet ML or Humanloop run on more platforms?
- Comet ML runs on Web, Linux, Mac, Windows. Humanloop runs on Web.
- Can I use Comet ML for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Comet ML best used for?
- Comet ML is most often used for llm observability and monitoring, ai agent testing and debugging, experiment tracking for machine learning, model registry and version management. Of those, llm observability and monitoring and ai agent testing and debugging are not what Humanloop is typically brought in for.
- What can Comet ML do that Humanloop cannot?
- Comet ML covers Experiment tracking, Code versioning, Model registry, Hyperparameter optimization.
Answered from the vendors’ own pages
Comet ML: Does Comet.ml offer a free plan?
Yes, Comet.ml offers free tiers for both Opik (cloud observability) and MLOps platforms. Free Cloud Opik includes up to 10 team members and 25,000 spans/month. Free MLOps tier is limited to 1 user.
SourceHumanloop: How much does Humanloop cost?
Humanloop offers a free trial with 2 members and 10,000 logs per month. Startup program and Enterprise plans require contacting sales for custom pricing based on usage needs.
SourceComet ML: How many team members can use the free Comet.ml tier?
Free Cloud supports up to 10 team members. The Pro Cloud plan supports up to 50 team members at $19/month.
SourceHumanloop: What are the limits on Humanloop's free trial plan?
Free trial includes 2 members, 50 evaluation runs, and 10,000 logs per month with access to all features at limited volume.
SourceComet ML: What is a span in Comet.ml pricing?
A span represents a single tracked operation such as model requests or function calls. Free Cloud tier includes 25,000 spans per month.
SourceHumanloop: How is Humanloop usage billed?
Humanloop bills based on logs created per API call to prompts, tools, evaluators, or flows. Separate charges apply from external AI providers like OpenAI and Anthropic using the customer's own API keys.
SourceComet ML: Does Comet.ml offer academic pricing?
Yes, a free Pro plan is available for academic users; verification is required via signup.
SourceHumanloop: Does Humanloop offer discounts for nonprofits or academics?
Academic and nonprofit pricing is available upon request, requiring contact with sales for customized rates.
SourceRelated pages
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- Humanloop vs MLflow
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- Humanloop vs Python
- Humanloop vs PyTorch
- Humanloop vs scikit-learn
- Humanloop vs Apache Spark MLlib
- Humanloop vs Weaviate
- Humanloop vs Weights & Biases
- Humanloop vs Alteryx
- Humanloop vs Anaconda
- Humanloop vs Cursor
- Humanloop vs Windsurf
- Humanloop vs Zed
- Humanloop vs Amp
- Humanloop vs Braintrust
- Humanloop vs Codacy
- Humanloop vs DeepSource
- Humanloop vs Devin
- Humanloop vs SonarQube Cloud
- Humanloop vs Augment Code
- Humanloop vs Baseten
- Humanloop vs Drizzle ORM
- Humanloop vs Flagsmith
- Humanloop vs Unleash
- Humanloop vs Bun
- Humanloop vs Cline
- Humanloop vs Factory
- Humanloop vs Langfuse