Cloud Storage: AI Market Discovery Index

Tracking how AI platforms recommend cloud storage. This public AI Market Discovery Index is updated monthly since July 2026.

By Mark Huntley, J.D.Growth Strategist & AI Discovery Analyst

7 minutes read

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On this page

01Benchmark Summary
02Current Benchmark at a Glance
03Research Scope and Qualification
04Current Brand Standings
05How to Read the Standings
06Recommendation Coverage Movement
07Largest Increase: MEGA
08Largest Decline: Backblaze
09Category Leader: Google Drive
10Recommendation Placement Snapshot
11Buyer-Intent Distribution
12Historical Measurement Record

Benchmark Summary

Google Drive led the Cloud Storage AI Market Discovery Index in September 2026 with valid recommendation coverage of 69.6%, matching its July 2026 baseline of 68.0% after a sharp dip to 29.1% in August 2026. The September rebound reverses the August decline and leaves the cumulative July-to-September pattern essentially unchanged, with Google Drive holding the category lead throughout the series. The gap to the next closest brand, Microsoft OneDrive at 63.2%, was 6.4 percentage points.

The largest coverage increase belonged to MEGA, which rose from 27.8% in July 2026 to 34.4% in September 2026, a gain of 6.6 percentage points. The largest coverage decline belonged to Backblaze, which fell from 27.3% in July 2026 to 18.3% in September 2026, a decline of 9.0 percentage points.

Across the full July-to-September series, most brands returned to levels near their July baselines following a broad category-wide decline in August 2026. The benchmark began with 800 prompt-surface observations in July 2026 and produced 690 qualified observations, while in September 2026 it began with 800 prompt-surface observations and produced 704 qualified observations.

AI recommendation trend

valid recommendation coverage, Jul 2026 to Sep 2026

Google Drive69.6%
Microsoft OneDrive63.2%
pCloud53.7%
IDrive45.6%
Sync.com42.3%
iCloud40.5%
MEGA34.4%
Dropbox Business19.9%
Backblaze18.3%
Box16.1%

Current Benchmark at a Glance

Measure	Jul 2026	Sep 2026	Movement
Qualified benchmark observations	690	704	Up 14
Tracked brands	10	10	No change
Qualified surface breadth	6	6	No change
Recommendation-shaped answer share	35.9%	47.6%	Up 11.7 points
Valid recommendation shortlist share	73.5%	76.6%	Up 3.1 points
Leader by valid recommendation coverage	Google Drive	Google Drive	No change

Qualified surface breadth counts the number of canonical AI/search surface families with at least one qualified observation. The six families are ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode. In September 2026, qualified observations appeared across all six families. In August 2026, the intermediate month, breadth was five families with no qualified observations recorded for ChatGPT.

For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending Cloud Storage

Research Scope and Qualification

The public benchmark is narrower than the raw collection universe by design. This ensures that brand-level percentages reflect a consistent, qualified set of prompt-surface observations.

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Research stage	Jul 2026	Sep 2026	What it represents
Source prompt-surface observations	800	800	Total prompts collected across AI/search surfaces
Unique questions	463	537	Distinct questions after removing duplicates
Brand / competitor mentions	800	800	Prompts containing at least one brand mention
Relevant observations	776	788	Prompts relevant to the Cloud Storage vertical
Irrelevant observations	24	12	Prompts outside the vertical's scope
Qualified benchmark observations	690	704	Public denominator after all qualification steps

Brand-level percentages use the qualified observations as the public denominator, not the raw collection. For full details on how the benchmark is assembled, see the AI Market Discovery Methodology.

Current Brand Standings

This table shows the current-month benchmark view for September 2026, sorted by valid recommendation coverage.

Brand	Presence rate	Valid recommendation coverage	Top-three rate	Rank-one rate	Net sentiment
Google Drive	96.9%	69.6%	54.4%	29.8%	0.7
Microsoft OneDrive	90.3%	63.2%	41.5%	13.8%	0.7
pCloud	69.9%	53.7%	15.6%	3.1%	0.8
IDrive	54.5%	45.6%	14.2%	7.8%	0.9
Sync.com	49.0%	42.3%	8.8%	0.9%	0.9
iCloud	61.9%	40.5%	22.7%	1.3%	0.7
MEGA	45.3%	34.4%	14.1%	7.2%	0.8
Dropbox Business	27.3%	19.9%	6.7%	0.6%	0.7
Backblaze	29.3%	18.3%	9.2%	3.1%	0.7
Box	24.0%	16.1%	1.0%	0.3%	0.7

How to Read the Standings

Presence rate: the share of qualified observations in which the brand is mentioned at all, regardless of whether it is recommended.
Valid recommendation coverage: the share of qualified observations in which the brand receives a valid, attributable recommendation.
Top-three rate: the share of qualified observations in which the brand appears among the top three recommended options.
Rank-one rate: the share of qualified observations in which the brand is the single first recommended option.
Net sentiment: the balance of positive over negative mentions, expressed on a scale where 1.0 is entirely positive and 0.0 is entirely negative.

For formulas and denominator rules, see AI Market Discovery Metric Definitions.

Recommendation Coverage Movement

Eight of the ten tracked brands moved within normal month-to-month variation between July 2026 and September 2026, with most returning to levels near their July baselines after the August decline.

Brand	Jul 2026	Sep 2026	Movement since baseline
Backblaze	27.3%	18.3%	Down 9.0 points
Box	18.7%	16.1%	Down 2.6 points
Dropbox Business	19.3%	19.9%	Up 0.6 points
Google Drive	68.0%	69.6%	Up 1.6 points
iCloud	40.3%	40.5%	Up 0.2 points
IDrive	46.8%	45.6%	Down 1.2 points
MEGA	27.8%	34.4%	Up 6.6 points
Microsoft OneDrive	60.9%	63.2%	Up 2.3 points
pCloud	56.2%	53.7%	Down 2.5 points
Sync.com	38.7%	42.3%	Up 3.6 points

Every brand recorded a significant increase from August 2026 to September 2026 after the category-wide August decline. MEGA rose from 14.3% in August 2026 to 34.4% in September 2026, and Google Drive rose from 29.1% in August 2026 to 69.6% in September 2026. These moves are described in the subsection detail below. The data describes the output distribution for the current qualified observation set; it does not establish why coverage moved across brands this month.

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Largest Increase: MEGA

MEGA's valid recommendation coverage rose from 27.8% in July 2026 to 34.4% in September 2026, an increase of 6.6 percentage points. This movement is beyond normal month-to-month variation. MEGA's raw mention presence rate rose from 36.1% to 45.3% over the same period. Top-three placement rose from 9.7% to 14.1%, and rank-one placement rose from 3.5% to 7.2%. MEGA also rose from 14.3% in August 2026 to 34.4% in September 2026.

Largest Decline: Backblaze

Backblaze's valid recommendation coverage fell from 27.3% in July 2026 to 18.3% in September 2026, a decline of 9.0 percentage points. This movement is beyond normal month-to-month variation. Its raw mention presence rate fell from 40.1% to 29.3% over the same period. Top-three placement declined from 12.3% to 9.2%, and rank-one placement declined from 3.5% to 3.1%, both within normal variation. Backblaze rose from 8.6% in August 2026 to 18.3% in September 2026, but the gain was not enough to recover its July level.

Category Leader: Google Drive

Google Drive remained the category leader in September 2026 at 69.6% valid recommendation coverage, up from 68.0% in July 2026. The gap to Microsoft OneDrive, the second-place brand, was 6.4 percentage points in September 2026, down from 7.1 percentage points in July 2026. Google Drive's lead over Backblaze widened from 40.7 percentage points in July 2026 to 51.3 percentage points in September 2026.

Recommendation Placement Snapshot

Coverage alone does not show how prominently a brand is recommended. Among the leading brands by valid recommendation coverage in September 2026, top-three and rank-one rates varied considerably.

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Brand	Sep 2026 top-three rate	Sep 2026 rank-one rate	Jul 2026 top-three rate	Jul 2026 rank-one rate
Google Drive	54.4%	29.8%	47.1%	21.4%
Microsoft OneDrive	41.5%	13.8%	37.7%	16.5%
pCloud	15.6%	3.1%	21.6%	6.4%

Close coverage can still hide different first-position rates. Google Drive held the top-three rate of 54.4% and rank-one rate of 29.8%, while Microsoft OneDrive appeared in first position at 13.8% despite coverage of 63.2%. pCloud converted less of its coverage into prominent placement, with a rank-one rate of 3.1% against coverage of 53.7%.

Buyer-Intent Distribution

All qualified observations in both months fell into the Brand Recommendation class.

Buyer-intent class	Jul 2026	Sep 2026
Brand Recommendation	690	704
Pricing & Value	0	0
Multi-Brand Comparison	0	0
Total qualified observations	690	704

The current public series measures the brand recommendation class of discovery and does not yet contain qualified observations in the pricing and value or multi-brand comparison classes.

Historical Measurement Record

This is an evergreen benchmark URL. New measurements are added to the same report.

Measurement	Qualified observations	Coverage leader	Leader coverage	Largest coverage movement
Jul 2026	690	Google Drive	68.0%	Google Drive, down 38.9 points in Aug
Aug 2026	523	Google Drive	29.1%	Google Drive, down 38.9 points from Jul
Sep 2026	704	Google Drive	69.6%	MEGA, up 20.1 points from Aug

Evidence and Source Layer

The benchmark is built from prompt-level observations that retain the query, AI/search surface, answer, brand outcome, recommendation placement, sentiment, and where exposed, citations or attributable evidence sources. Source presence is evidence about the information environment. It is not automatically proof that the source caused the recommendation. The August 2026 measurement window did not include qualified observations from ChatGPT, while both July 2026 and September 2026 did; the benchmark cannot separate this change in surface mix from the decline recorded in August coverage across brands.

Scope Boundaries

This public benchmark does not measure:

Market share or revenue attribution
Attributable sales or conversions
Every possible AI response a model could produce
Organic-search ranking positions
Social media mention volume
Private or sponsored channels
Causality from a metric movement alone

About This Benchmark

The LLM Authority Index AI Market Discovery Index tracks how brands appear and are recommended across major AI and search surfaces. It records the state of the information environment for a vertical using a consistent, qualified set of prompt-surface observations each month.

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