Machine Learning · head to head
Comet ML vs Elastic Stack
Comet ML
Machine Learning
Platform for tracking, comparing, and optimizing ML experiments
- From
- Free
- Rated
- -
Elastic Stack
Logging
Search, Observability, and Security Solutions
- From
- On request
- Rated
- -
The short version
- Only Comet ML has a free tier, so it costs nothing to try first.
- Each has a real cost: Comet ML the free cloud tier caps data at 25,000 spans a month with 60 day retention; Elastic Stack self-managed deployment requires licensing based on node count and RAM usage
- They diverge on capability: Comet ML covers Experiment tracking, Elastic Stack covers Full-text search.
Where they differ
Only the attributes on which Comet ML and Elastic Stack actually diverge.
| Attribute | Comet ML | Elastic Stack |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | freemium | subscription |
| Free tier | Yes | No |
| Platforms | Web, Linux, Mac, Windows | Cloud-hosted, Self-managed, Docker, Kubernetes (ECK) |
| Category | Machine Learning | Logging |
| Founded | 2017 | 2011 |
Identical on both: 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 Elastic Stack
- Full-text search
- Log analytics
- Security monitoring
- Alerting
- API
- Webhooks
- REST
- Api support
Both cover
- Web support
What people use each for
The jobs each tool is most often brought in to do.
Comet ML
- LLM observability and monitoringnot Elastic Stack
- AI agent testing and debuggingnot Elastic Stack
- Experiment tracking for machine learningnot Elastic Stack
- Model registry and version managementnot Elastic Stack
- ML model training monitoringnot Elastic Stack
Elastic Stack
- Distributed search and analytics engine for production-scale workloadsnot Comet ML
- Full-text search and vector search with approximate nearest neighbour supportnot Comet ML
- Security event tracking with field-level and document-level access controlnot Comet ML
- Machine learning capabilities including anomaly detection and forecastingnot 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
Elastic Stack
- Self-managed deployment requires licensing based on node count and RAM usage
- Serverless option has pending features including traffic filtering and bring-your-own-key encryption
- Hosted deployment requires custom resource configuration for cluster management
- Pricing models differ significantly across Hosted, Serverless, and Self-managed options
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
Elastic Stack
On requestNo published plan breakdown. See the Elastic Stack review.
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.
Choose Elastic Stack if
- You need full-text search.
- You work on Cloud-hosted, Self-managed, Docker, Kubernetes (ECK).
- You also want log analytics.
Questions people ask
- Is Comet ML or Elastic Stack better?
- Neither clearly leads. Comet ML starts at Free and Elastic Stack at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Comet ML or Elastic Stack?
- Comet ML has a free tier; the other does not. Paid plans start at Free for Comet ML and On request for Elastic Stack.
- Does Comet ML or Elastic Stack run on more platforms?
- Comet ML runs on Web, Linux, Mac, Windows. Elastic Stack runs on Cloud-hosted, Self-managed, Docker, Kubernetes (ECK).
- Can I use Comet ML for free?
- Yes. Comet ML has a free tier, so you can try it without paying. Elastic Stack starts at On request.
- 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 Elastic Stack is typically brought in for.
- What can Comet ML do that Elastic Stack cannot?
- Comet ML covers Experiment tracking, Code versioning, Model registry, Hyperparameter optimization. Elastic Stack covers Full-text search, Log analytics, Security monitoring, Alerting. Both handle Web support.
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.
SourceElastic Stack: How much does Elastic Stack cost?
Elastic does not publish specific pricing on the Elastic Stack product page. Users can start a 14-day free trial with no credit card required, but ongoing subscription pricing requires contacting their sales team.
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.
SourceElastic Stack: What deployment options are available for Elastic Stack?
Users can deploy Elastic Stack on Elastic Cloud (hosted on AWS, Google Cloud, or Azure) or download it for self-managed deployment. Pricing for managed cloud hosting must be obtained by starting a trial or contacting sales.
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.
SourceComet ML: Does Comet.ml offer academic pricing?
Yes, a free Pro plan is available for academic users; verification is required via signup.
SourceRelated pages
More on Elastic Stack
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