Chapter 5

The Peer Test

Earlier chapters described Gartner's economics from the inside — high retention, ~27% returns on capital, cash conversion near 1.4x net income. This chapter asks whether those numbers are franchise-specific or just what the industry looks like, by benchmarking against the only public company running the identical model — Forrester — and a spread of adjacent consultancies. On the metrics both pure-plays disclose, the two have diverged sharply: Gartner keeps growing and retaining, while Forrester's revenue has fallen roughly a fifth in three years.

Only one true comparator

Gartner's own 10-K does not name rivals. It describes categories: "a significant number of independent providers of information products and services," consulting firms, "free sources of information that are available to our clients through the internet," and — added in recent filings — "more competition with increased adoption of AI services" [1]. That vagueness is itself informative: no single competitor is large enough to name.

The screened peer set bears this out. Of the six comparators, only Forrester Research runs Gartner's exact structure — a Research/Consulting/Events model selling subscription research to business and technology leaders. Information Services Group (ISG) is an adjacent research-and-advisory firm; Accenture, FTI Consulting, Huron, and CRA International are project-based consultancies whose economics differ fundamentally from a subscription business. So the moat test rests on Forrester; the consultancies serve only as a backdrop for what professional-services economics look like when the revenue is a project, not a renewing contract.

The scale gap is the first fact. Gartner is in steady contact with "over 13,000 distinct client enterprises," publishes through "more than 2,400 business and technology experts," and logged "more than 510,000 direct client interactions in 2025" [2]. Forrester ended 2025 with 1,797 clients. On revenue, Gartner is roughly sixteen times Forrester's size; on market value, roughly sixty times.

Source: Gartner and peer FY2025 filings, as reported; revenue and cash-flow ratios derived from reported financials. Market values as of mid-2026. Gartner scale figures from FY2025 10-K, Item 1 [3].

Two things stand out. Gartner has the highest operating-cash-flow conversion in the set — 19.9 cents of operating cash per revenue dollar, ahead of Accenture (16.5%) and well ahead of every other name. And of the two pure-play subscription-research firms, one is growing and one is shrinking: Gartner's revenue compounded at 5.9% over three years while Forrester's contracted at 9.6% a year and ISG's at 5.1%. The subscription-research label alone does not confer durability.

The pure-play divergence

The clearest test is to run Gartner and Forrester side by side on the metrics they define identically. Since 2021 their revenue paths have separated by roughly 57 index points.

Source: derived from Gartner and Forrester reported revenue, FY2021–FY2025 filings. Gartner: $4,734M (2021) to $6,497M (2025); Forrester: $494M (2021) to $397M (2025).

Forrester's revenue peaked in 2022 at $538M and has fallen every year since, to $397M — down 26% from the peak. Gartner grew through the same window. That divergence shows up one level deeper, in the contract-value and retention metrics both firms report. Gartner's total Insights contract value edged up 1% to $5,155M in 2025, with client retention at 85% (Global Technology Sales) and 86% (Global Business Sales) [4]. Forrester's contract value fell to $292M — down from $346M in 2022 — its client retention sat at 77%, and its client count has dropped from 3,005 in 2021 to 1,797.

Source: Gartner FY2025 10-K, MD&A Insights segment [5]; Forrester FY2025 filing, as reported.

The retention gap is roughly nine points on client retention and ten to twelve on wallet retention — the difference between a base that renews and enriches and one that renews at a discount. On the balance-sheet mechanics that Cash and the Float covered, that gap is what separates a business whose deferred-revenue float keeps compounding from one whose float is draining.

Forrester as leading indicator

The comparison cuts the other way too, and honesty requires stating it. Forrester's wallet retention crossed below 100% back in 2022–2023; Gartner's crossed below 100% only in 2025 — GTS falling from 102% to 96%, GBS from 106% to 99% [6]. The direction of travel is the same; Gartner is simply one to two years behind on the curve.

Source: Forrester FY2021–FY2025 filings, as reported. Gartner's blended wallet retention crossed below 100% only in 2025 (see Retention and AI).

Forrester's decline is the bear's exhibit: the identical model can erode, and it has, in the same low-end and AI-exposed demand that Gartner's own client-enterprise count has been thinning. Whether Gartner follows Forrester down or holds the line is the open question, and the reported loss on Forrester's income statement — an operating loss of $113M in 2025 — overstates the operational damage, because roughly $111M of it is a non-cash goodwill write-down of past acquisitions rather than a cash cost. The cleaner signals are revenue, contract value, retention, and cash — and each of those, independently, shows a subscription business contracting.

Cash conversion is the franchise signal

For a reader whose test is whether free cash flow can stay strong for a decade, the most durable evidence is not margin — which impairments distort — but cash conversion. Here Gartner separates from the entire set, pure-play and consultancy alike.

Source: derived from FY2025 reported financials for Gartner and peers.

Gartner converts nearly a fifth of revenue to operating cash; the median consultancy converts about half that, and the two subscription peers sit at the bottom. Consistency matters as much as level: Gartner's operating cash flow held between $903M and $1,485M in every year from 2020 to 2025, while Forrester's swung to negative $3.9M in 2024 before recovering to $21M in 2025 — the wavering cash generation that a durability-focused investor treats as a warning. On returns, the clean comparators cluster — Gartner's return on capital employed of 25.6% sits alongside Accenture's 24.1% and CRA's 27.8% — so a mid-20s return on capital is achievable across well-run professional-services firms; what Gartner adds on top is the scale, retention, and cash conversion that Forrester, running the same playbook at one-sixteenth the size, cannot match.

What the peer evidence settles, and what it does not

The benchmark supports the franchise-specific read. Gartner's retention runs roughly nine points above the only firm with an identical model; its cash conversion leads a set of seven; and where a same-model competitor at smaller scale has seen contract value, client count, and revenue all contract for three straight years, Gartner has kept each of them growing. The ~27% returns and high retention that earlier chapters described are not merely what the industry earns — Forrester earns far less on the same model — which is the core of why the moat looks real rather than incidental.

The strongest fact against that read sits in the same data: Forrester is a genuine leading indicator, not a foil. It crossed below 100% wallet retention two years before Gartner, and Gartner has now started down the same slope, with blended wallet retention rolling over in 2025 and the client-enterprise count already thinning. The peer set cannot tell you whether scale is durable immunity or merely a longer runway on the same erosion. What would decide it is visible and near-term: if Gartner's wallet retention stabilizes near current levels and contract value stays positive, the divergence holds and scale is the moat; if wallet retention keeps falling toward Forrester's high-80s and contract value turns negative, Gartner is early on a path a same-model peer has already walked. That is the metric to watch, and it reports every quarter.