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Machine Learning & Data Science · head to head

Comet ML vs Together AI

Comet ML logo

Comet ML

Machine Learning & Data Science

Platform for tracking, comparing, and optimizing ML experiments

From
Free
Rated
-
Together AI logo

Together AI

AI Tools

Open-source AI at scale

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; Together AI fine tuning carries a minimum charge of $4.00 per job regardless of dataset size
  • They diverge on capability: Comet ML covers Experiment tracking, Together AI covers Open-source models.

Where they differ

Only the attributes on which Comet ML and Together AI actually diverge.

Attributes where Comet ML and Together AI differ
AttributeComet MLTogether AI
Pricing modelfreemiumusage-based
PlatformsWeb, Linux, Mac, WindowsApi, Cloud
CategoryMachine Learning & Data ScienceAI Tools
Founded20172022

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 Together AI

  • Open-source models
  • Fine-tuning
  • Fast inference
  • Embeddings
  • REST API
  • Python SDK
  • OpenAI compatible
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

Comet ML

  • Tracking machine learning experiments, metrics and model versionsnot Together AI
  • Monitoring and evaluating LLM applications with tracingnot Together AI

Together AI

  • Serverless inference against open source chat, vision, embedding, image and video modelsnot Comet ML
  • Renting dedicated single tenant H100, H200 or B200 GPU clusters by the hournot Comet ML
  • Fine tuning open weight models on a per token basisnot 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

Together AI

  • Fine tuning carries a minimum charge of $4.00 per job regardless of dataset size
  • Reserved GPU commitments beyond 180 days are priced by contacting sales with no published rate
  • Volume and enterprise discounts are quote only with no published threshold
  • Reserved dedicated inference pricing is contact sales while only on demand rates of $5.49 to $8.99 per GPU hour are published

Pricing, plan by plan

Comet ML

Free
  • FreeFree
    • 100 experiments
    • Basic features
    • Community support
  • Team$179/month
    • Unlimited experiments
    • Team collaboration
    • Priority support

Together AI

Free
  • FreeFree
    • $5 credits
    • API access
  • Pay-per-use$0.2/per-million-tokens
    • All models
    • Fine-tuning

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 Together AI if

  • You need open-source models.
  • You want to start without paying.
  • You work on Api, Cloud.
  • You also want fine-tuning.

Questions people ask

Is Comet ML or Together AI better?
Neither clearly leads. Comet ML starts at Free and Together AI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Comet ML or Together AI?
Comet ML starts at Free and Together AI at Free.
Does Comet ML or Together AI run on more platforms?
Comet ML runs on Web, Linux, Mac, Windows. Together AI runs on Api, Cloud.
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 tracking machine learning experiments, metrics and model versions, monitoring and evaluating llm applications with tracing. Of those, tracking machine learning experiments, metrics and model versions and monitoring and evaluating llm applications with tracing are not what Together AI is typically brought in for.
What can Comet ML do that Together AI cannot?
Comet ML covers Experiment tracking, Code versioning, Model registry, Hyperparameter optimization. Together AI covers Open-source models, Fine-tuning, Fast inference, Embeddings.

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