CUMUL.IO vs Fathom: Analytics Comparison (2026)

An independent side-by-side comparison of CUMUL.IO and Fathom for analytics buyers — pricing, features, integrations, and how often each is cited by major AI engines.

AI Citation Scorecard

How often each is cited by major AI engines when buyers ask analytics questions. Last 90 days across ChatGPT, Perplexity, Gemini, Claude, and Copilot.

Too early to call — probes still building data.
ChatGPT
CUMUL.IO
Tracking…
No data yet
Fathom
26 / 145 probes
18%
Average
Perplexity
CUMUL.IO
Tracking…
No data yet
Fathom
48 / 145 probes
33%
Good
Gemini
CUMUL.IO
Tracking…
No data yet
Fathom
49 / 145 probes
34%
Good
Claude
CUMUL.IO
Tracking…
No data yet
Fathom
26 / 145 probes
18%
Average
Copilot
CUMUL.IO
Tracking…
No data yet
Fathom
297 / 420 probes
71%
Excellent
Scale:NoneLowFairStrongExcellent

Probes run hourly; each (engine × query) combo retests every ~3 days.

Pricing

CUMUL.IO
Starting price
—
Free tier
—
cumul.io ↗
Fathom
Starting price
$15/month
Free tier
—
usefathom.com ↗

Key Features

CUMUL.IO

Feature data is being indexed.

Fathom
  • ✓Up to 50 sites included
  • ✓Ecommerce/event tracking included
  • ✓Easy integration with all CMSs/frameworks
  • ✓API access
  • ✓Forever data retention
  • ✓100% data ownership
  • ✓No cookie banners required
  • ✓Unlimited email reports

When to choose CUMUL.IO

Choose CUMUL.IO if your team prioritizes its strengths over Fathom's. Full guidance populates as CUMUL.IO's feature data is indexed.

When to choose Fathom

Choose Fathom if your team prioritizes its strengths over CUMUL.IO's. Full guidance populates as Fathom's feature data is indexed.

AI visibility profiles

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CUMUL.IO

cumul.io

Fathom

usefathom.com

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We ask the buyer questions in this market across ChatGPT, Claude, Gemini, Perplexity and Copilot, and show you who gets named.

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