MarketSizer vs HG Insights
HG Insights is the enterprise data foundation for planning: install bases, IT spend, TAM. MarketSizer answers the Monday-morning question: who is switching, trialling or renewing right now. One plans the year; the other works the week.
“AI-powered Revenue Growth Intelligence.”
Source: hginsights.com homepage
Best known for / useful for
HG Insights
Best known for
A broad enterprise intelligence fabric combining technographics, firmographics, spend and contract data with AI copilots and account-planning tools.
Useful for
Enterprise strategy, marketing and RevOps teams building account plans, TAM models and territory design from a wide technology-and-spend dataset.
MarketSizer
Best known for
Subscription intelligence - accounts ranked by observable buying events, not spend estimates or install-base snapshots.
Useful for
GTM teams that want execution-ready timing signals reps can act on this week, not a data foundation to plan next quarter around.
Where HG Insights is strong
- Long-established technographic dataset covering tens of thousands of technologies.
- IT-spend and contract-value estimates useful for enterprise territory planning and TAM work.
- Deep account intelligence used across strategy, marketing and RevOps teams.
- Strong enterprise footprint - HG works with a large share of the Fortune 1000 B2B tech list.
- AI copilots and connected fabric positioning that resonates with enterprise data leaders.
- Analyst-friendly reporting formats useful for market-intelligence functions.
Feature-by-feature comparison
| Feature | HG Insights | MarketSizer |
|---|---|---|
| Data coverage | ||
| Technology install-base breadth | Tens of thousands of technologies | 200+ vendors deep, expanding across martech |
| IT-spend and contract estimates | Included | Not included |
| Historical subscription events per account | Not included | Included |
| Active subscriptions tracked | Install-base snapshot | 17M+ active, 2.5M+ active trials |
| SMB and mid-market coverage | Enterprise-heavy | Included |
| Buying signals | ||
| Aggregated buyer-intent scores | Included | Included |
| Category-level competitor trial detection | Not included | Included |
| Vendor switch and churn events | Not included | Included |
| Signal explainability at the event level | Score-level | Included |
| Workflow | ||
| Chrome-extension side panel for reps | CRM-embedded sales module | Included |
| Two-way CRM sync | Included | HubSpot, Pipedrive and Zoho CRM |
| Primary user | Strategy / RevOps / marketing | Sales reps and GTM leads |
| Setup time to first data | Enterprise data integration | Live in minutes |
| Commercial | ||
| Pricing | Custom, consumption-based (not published) | Credit-based (usage) - see pricing page |
MarketSizer pricing as published at marketsizer.io/pricing. HG Insights details as published on their own site and public documentation, last checked 8 August 2026. Spotted something out of date? Tell us and we will fix it.
Which team should choose which
Choose HG Insights if
- You are running enterprise ABM and need install-base plus spend estimates for territory planning.
- Your primary buyer is a market-intelligence, strategy or RevOps team - not a frontline seller.
- You need the widest possible technology-install coverage across many categories at once.
- You value analyst-friendly reporting and a full enterprise data-fabric narrative.
- A strategic data foundation, procured properly at enterprise level, is what your programme calls for.
Choose MarketSizer if
- You want event-based buying signals reps can act on this week, not a data foundation to plan next quarter around.
- Your team sells into SMB and mid-market as well as enterprise.
- You want to know when an account is changing vendors, rather than only what they own today.
- You want signal-level explainability, not a black-box aggregated score.
- You need something reps can adopt in minutes via a Chrome extension that works alongside HubSpot, Salesforce, LinkedIn or Apollo.
What buyers say about the category
Themes from GTM leaders currently evaluating tools in this space.
HG Insights earns its reputation with the buyers we speak to: install-base and IT-spend coverage deep enough to plan territories on. The point where those same buyers go looking elsewhere is timing. An install base says what an account owns. It does not say what the account is evaluating this quarter or which contract renews next. Several run HG for planning and a subscription-timing layer for execution, side by side.
“Every platform we looked at tells me what an account owns today. None of them tell me what it is about to buy. That gap is the whole game.”
“Lists of cold accounts that fit the profile are easy to get. What we need is to follow the whole category and know which accounts have real buying context right now.”
MarketSizer vs HG Insights - frequently asked questions
What is HG Insights best known for?
HG Insights is best known for technographic intelligence - which technologies a company has installed - and IT-spend and contract-value estimates. Enterprise ABM teams typically use it for territory planning, TAM modelling and market sizing rather than day-to-day rep prioritisation.
How is MarketSizer intent data different from HG intent?
HG intent is delivered as an aggregated buyer-intent score across web-activity signals. MarketSizer surfaces the underlying event - a trial started, a vendor switched, a subscription renewing - attached to the account it happened on. Reps see the specific evidence behind every signal, with nothing rolled up out of sight.
Is HG Insights only for enterprise?
HG is enterprise-shaped: the dataset, the buyer and the consumption-based custom pricing (no public price list) all point at large-organisation planning teams. MarketSizer covers SMB and mid-market alongside enterprise and is credit-based with a self-serve entry point (see pricing).
Can MarketSizer and HG Insights coexist?
Yes. Some enterprise teams use HG for market sizing and territory design and MarketSizer for weekly rep prioritisation - the two work at different altitudes of the same GTM stack. MarketSizer signals can be pushed into the CRM alongside HG account attributes.
Which categories is MarketSizer strongest in?
MarketSizer goes deep in 200+ vendors in Customer Support, Live Chat and adjacent SaaS categories, tracking the full subscription lifecycle per account. HG Insights is far broader on technology coverage but shallower on event-level history. Depth vs breadth is the real trade-off between the two.
What about setup time?
HG Insights rollouts run through enterprise data integration and onboarding. MarketSizer is live in minutes via the SignalOps Chrome extension or a native CRM sync - reps can validate signal quality before procurement is involved.
When would a team choose HG Insights over MarketSizer?
When the primary requirement is a broad enterprise data foundation for planning - TAM, territory design, install-base analysis - and the buying organisation runs a full enterprise procurement. MarketSizer is the better fit when the primary requirement is timing and rep-facing execution.
See MarketSizer next to your HG Insights data.
30 minutes on your accounts, tailored to your ICP. We show which companies are trialling, switching or renewing right now, so you can see whether the timing signal changes what your team does next.
500 credit trial No credit card Live data, not a slide deck
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