Is Arize AI or Fathom better?

Neither clearly leads. Arize AI starts at Free and Fathom at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Arize AI or Fathom?

Arize AI starts at Free and Fathom at Free.

Does Arize AI or Fathom run on more platforms?

Arize AI runs on web, api. Fathom runs on Web, Zoom, Google Meet, Microsoft Teams.

Can I use Arize AI for free?

Both have a free tier, so you can try either at no cost before committing.

What is Arize AI best used for?

Arize AI is most often used for tracing and debugging production ai agents, running large-scale evaluations across traces and sessions, improving prompts before production rollout, storing and querying genai traces alongside a data warehouse. Of those, tracing and debugging production ai agents and running large-scale evaluations across traces and sessions are not what Fathom is typically brought in for.

What can Arize AI do that Fathom cannot?

Arize AI covers End-to-end tracing, Evaluation framework, Prompt testing and improvement, Alyx AI engineering agent. Fathom covers Auto-recording, AI summaries, Transcription, Highlight clips.

AI · head to head

Arize AI vs Fathom

Arize AI

AI engineering platform for observability and evaluation of agents and LLM apps

From: Free
Rated: -

Full review Website

Fathom

Free AI meeting assistant

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Arize AI the free plan caps trace spans at 25,000 per month with only 15 days of retention.; Fathom team plan requires minimum 2 users; cannot purchase single seat at team pricing
They diverge on capability: Arize AI covers End-to-end tracing, Fathom covers Auto-recording.
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Arize AI and Fathom actually diverge.

Attributes where Arize AI and Fathom differ
Attribute	Arize AI	Fathom
Pricing model	freemium	Unknown
Platforms	web, api	Web, Zoom, Google Meet, Microsoft Teams
Founded	Unknown	2020

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (AI).

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 Arize AI

End-to-end tracing
Evaluation framework
Prompt testing and improvement
Alyx AI engineering agent
Custom dashboards
Data warehouse integrations

Only in Fathom

Auto-recording
AI summaries
Transcription
Highlight clips
Zoom
Google Meet
HubSpot
Salesforce

What people use each for

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

Arize AI

Tracing and debugging production AI agentsnot Fathom
Running large-scale evaluations across traces and sessionsnot Fathom
Improving prompts before production rolloutnot Fathom
Storing and querying GenAI traces alongside a data warehousenot Fathom

Fathom

AI-powered meeting transcription and automatic note-taking for sales teams and professionalsnot Arize AI
Meeting analysis with AI scorecards and action item generation that syncs to CRMsnot Arize AI

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Arize AI

The free plan caps trace spans at 25,000 per month with only 15 days of retention.
Self-hosted deployment and Data Fabric integration are restricted to the custom-priced Enterprise tier.
Pricing beyond the $50/month Pro plan requires a custom quote, making cost planning less transparent at scale.
Advanced compliance features like HIPAA are only available on Enterprise.

Fathom

Team plan requires minimum 2 users; cannot purchase single seat at team pricing
CRM field sync and deal view summaries available only on Business plan ($34/user/month) and above

Pricing, plan by plan

Arize AI

Free

AX FreeFree
- 25k trace spans/month
- 1 GB storage/month
- 15-day retention
AX Pro$50/month
- 50k trace spans/month
- 10 GB storage/month
- 30-day retention
AX Enterprise$undefined/mo
- Custom trace spans, storage, and retention
- SaaS or self-hosted deployment
- Managed agents and Data Fabric

Fathom

Free

No published plan breakdown. See the Fathom review.

Which should you pick?

Choose Arize AI if

You need end-to-end tracing.
You want to start without paying.
You work on web, api.
You also want evaluation framework.

Arize AI review

Choose Fathom if

You need auto-recording.
You want to start without paying.
You work on Web, Zoom, Google Meet, Microsoft Teams.
You also want ai summaries.

Fathom review

Questions people ask

Is Arize AI or Fathom better?: Neither clearly leads. Arize AI starts at Free and Fathom at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Arize AI or Fathom?: Arize AI starts at Free and Fathom at Free.
Does Arize AI or Fathom run on more platforms?: Arize AI runs on web, api. Fathom runs on Web, Zoom, Google Meet, Microsoft Teams.
Can I use Arize AI for free?: Both have a free tier, so you can try either at no cost before committing.
What is Arize AI best used for?: Arize AI is most often used for tracing and debugging production ai agents, running large-scale evaluations across traces and sessions, improving prompts before production rollout, storing and querying genai traces alongside a data warehouse. Of those, tracing and debugging production ai agents and running large-scale evaluations across traces and sessions are not what Fathom is typically brought in for.
What can Arize AI do that Fathom cannot?: Arize AI covers End-to-end tracing, Evaluation framework, Prompt testing and improvement, Alyx AI engineering agent. Fathom covers Auto-recording, AI summaries, Transcription, Highlight clips.

Answered from the vendors’ own pages

Arize AI: What does Arize AX cost?

Arize AX offers a free plan, a Pro plan at $50/month, and a custom-priced Enterprise plan, with pricing based on trace spans, storage, and retention needs.

Source

Fathom: What is the most affordable paid plan for individuals, and what does it include?

Fathom Premium costs $20 per month (or $16 per month billed annually). It includes advanced summaries, action items, and a conversational AI assistant, in addition to the features in the free plan.

Source

Arize AI: Is there a free plan, and what are its limits?

The AX Free plan includes 25,000 trace spans and 1 GB of storage per month with 15-day retention, plus unlimited users, evaluations, and experiments.

Source

Fathom: What is included in Fathom's free plan?

The free plan includes unlimited recordings, transcriptions, AI summaries, clips, and playlists at no cost forever.

Source

Arize AI: What deployment options are available?

Free and Pro plans are SaaS-only, while Enterprise customers can choose SaaS or self-hosted deployment with custom SLAs.

Source

Fathom: How much does the Team plan cost per user, and what features does it add?

The Team plan costs $19 per month per user (minimum 2 users, or $15 per month annually). It includes everything from Premium plus global search, collaboration features, and team playlists.

Source

Fathom: What trial or guarantee is available before committing to a paid plan?

All paid plans offer a 90-day guarantee to test features risk-free.

Source

Fathom: Does Fathom offer free or discounted plans for startups or nonprofits?

Yes, qualified portfolio companies get up to 2 years free, and nonprofits can apply for 10 free seats.

Source

Arize AI vs Fathom

Arize AI

Fathom

The short version

Where they differ

What each one covers

Only in Arize AI

Only in Fathom

What people use each for

Arize AI

Fathom

Where each one falls short

Arize AI

Fathom

Pricing, plan by plan

Arize AI

Fathom

Which should you pick?

Choose Arize AI if

Choose Fathom if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Arize AI

More on Fathom

Keep looking

Other head to heads