Research

Retrieval Layer Intelligence Report

Monthly benchmarks and strategic guidance for navigating the shift from Search Engines to Action Engines.

Updated April 3, 2026

Research Methodology

This report was put together by Hayden Bond, an independent AI SEO practitioner with no vendor relationships and no affiliate arrangements. Data is triangulated from SimilarWeb, First Page Sage, and a16z consumer app rankings. This page is updated monthly as the market moves.

How This Report Measures Market Position

Web traffic share is the most widely cited metric for AI platform market position. It is also increasingly insufficient on its own. A brand making optimization decisions based on web traffic share alone would heavily over-index on ChatGPT and underweight platforms like Copilot, Claude, and Gemini — precisely where enterprise buying decisions and mobile-first discovery are actually happening.

This report triangulates across three data sources because each measures a different usage surface. SimilarWeb captures browser-based web traffic. Apptopia captures iOS and Android mobile app daily active users. Desktop app usage — an increasingly significant surface as practitioners adopt native AI apps — is not captured by either source. The numbers in this report reflect what is measurable. Where data is not publicly available, that gap is named rather than estimated.

The practical implication: read every number in this report through the lens of your buyer's actual AI usage context. If your buyers are enterprise decision-makers working in Microsoft 365, Copilot's web referral share understates its market position significantly. If your buyers are mobile-first, Claude's trajectory matters more than its web traffic rank. If your buyers use desktop AI apps — increasingly common among practitioners — neither web traffic nor mobile DAU captures how they are actually using these platforms.

Market Update: April 2026

•ChatGPT mobile DAU share fell below 40% for the first time, hitting 38.7% in March — down from approximately 52% six months prior. Source: Apptopia, April 2026.
•Claude surged to #1 on the US iOS App Store, driving 167% month-over-month DAU growth. Peak sign-ups exceeded 1 million per day. Source: Apptopia and TechDogs, March 2026.
•OpenAI closed a $122 billion funding round at an $852 billion valuation. 900 million weekly active users, $2 billion monthly revenue. Source: Bloomberg and OpenAI, March to April 2026.
•Microsoft Copilot now orchestrates multiple models simultaneously via Critique and Model Council features — GPT-5.2 and Claude operating in the same workflow. Source: MarketingProfs AI Update, April 3, 2026.

The Multi-Model Reality

Web traffic share is no longer the whole story.

Enterprise Adoption

81%

of Global 2000 companies now run three or more AI model families concurrently. Picking one model is no longer the strategy. Source: a16z, January 2026.

Multi-Tenanting

20%

of weekly ChatGPT web users also use Gemini in the same week. Consumer behavior mirrors enterprise strategy - this market is not winner-take-all. Source: a16z, March 2026.

Embedding Economy

Copilot + Claude

Microsoft Copilot now runs GPT-5.2 and Claude simultaneously via Critique and Model Council features. Bluesky's Attie assistant runs on Claude. The biggest platforms are model-agnostic by design. Source: MarketingProfs, April 3, 2026.

ChatGPT Global Share

64.5%

down 9.5pp year-over-year

Gemini Global Share

24.1%

up 18.4pp year-over-year

Copilot Enterprise

85%

Fortune 500 penetration

Claude Mobile DAU

US iOS App Store, April 2026

Agentic Ecosystem Status

When a user asks an AI agent to research a topic, book a trip, or compile a report, the agent clicks, reads, and acts. The human may never see your site at all. These platforms are where that agent activity originates. Scale tells you how much of it is happening. Bounce rate tells you how much intent the human behind the agent actually had.

Tier 1

ChatGPT

Monthly Visits

5.35B

Bounce Rate

32.3%

Traffic Channel

Direct (76%)

Web share 64.5%. Mobile DAU share fell to 38.7% — lowest on record. Visits down from January peak of 5.72B.

Tier 1

Gemini

Monthly Visits

2.11B

Bounce Rate

29.9%

Traffic Channel

Direct (77%)

Web share 24.1%. Deep Google Workspace embedding driving enterprise growth. Gemma 4 open-weight model released April 2026.

Tier 1

Grok

Monthly Visits

298.5M

Bounce Rate

N/A

Traffic Channel

Direct (est.)

Composite share 5.0%, up from 2.6%. X integration and mobile-driven growth. Entered top 3 for first time.

Tier 1

Claude

Monthly Visits

290.3M

Bounce Rate

26.7%

Traffic Channel

Direct (75%)

Composite share 6.3%, up from 3.3%. Lowest bounce rate in cohort. #1 US iOS App Store March 1, 2026. 167% MoM DAU growth.

Tier 1

DeepSeek

Monthly Visits

246.4M

Bounce Rate

N/A

Traffic Channel

Direct (est.)

Dropped to 5th globally after Grok and Claude surpassed it. Strong open-source presence, limited US enterprise.

Tier 2

Perplexity

Monthly Visits

153.8M

Bounce Rate

32.2%

Traffic Channel

Direct (73%)

Stable niche in AI-native search. Lowest power-user churn at 11.7%. High-intent research audience.

Tier 2

Copilot

Monthly Visits

~95M (web only)

Bounce Rate

31.3%

Traffic Channel

Direct (82%)

Web traffic severely understates actual market position. 85% of Fortune 500 use Microsoft AI tools. 15 million paid seats as of Q1 2026. Highest power user engagement in cohort at 154 minutes per day.

AI Search Platform Usage Across Surfaces

Web traffic, mobile app usage, and desktop app usage are three distinct surfaces measured by three different data sources — none of them complete on their own. SimilarWeb measures browser-based web traffic. Apptopia measures iOS and Android app installs and daily active users. Desktop app usage — how practitioners increasingly access Claude, ChatGPT, and others — is not captured by either source. The numbers below reflect what is measurable. The gaps are real and worth naming.