MarketSizer leverages real-time subscription insights to provide your revenue teams with highly qualified opportunities that are a strong fit, actively buying and historically winnable.
8 out of 10 MarketSizer opportunities are ICP-aligned and in-market when contacted
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Every account MarketSizer surfaces is backed by evidence across three critical dimensions.
Real signals from trials, churn, and renewals.
Know when companies are actively evaluating solutions. We detect trials within weeks, competitive churn events, and renewal windows, not anonymous page views.
Companies that match your best customers.
ICP matching based on tech stack, competitive overlap, and observed market behaviour, not just firmographics. See companies that behave like the deals you already win.
Focus where you have proof of success.
Historical win likelihood based on 40M+ subscription outcomes. See which competitive scenarios you typically win and avoid deals you're unlikely to close.
Identify companies that fit your ICP, are actively trialing your competitors, recently churned from incumbents, or approaching renewal windows, and where you have a high win probability based on historical subscription data.





Find companies actively evaluating solutions. Prioritise deals by ICP fit and win probability. Know which competitors they're trialing and when to engage.
Build ABM campaigns targeting companies that are actually in-market. Focus ad spend on qualified opportunities with high conversion likelihood.
See when customers trial competitors months before renewals. Get early warnings and identify expansion opportunities you're currently missing.
Most tools show who to target, MarketSizer tells you when to move. We detect real subscription signals (trials, renewals, churn), calculate win probability + ETC (30/60/90), and push a ready-to-send play into your CRM or browser. No guesswork.
Yes. MarketSizer works seamlessly with CRMs like HubSpot, Salesforce, and Zoho or you can start without one. The Copilot works for any website or directly in your workflow (CRM, LinkedIn, Apollo), and you can sync enriched records when ready.
Nope. MarketSizer fits into your current stack, no rip and replace. We sync with your existing GTM workflows and activate your signals where you already work.
MarketSizer is for Sales, Marketing, and Customer Success teams that want to win earlier, retain better, and spend smarter. If timing matters, we’re for you. If you're targeting accounts without knowing when they’re ready, we fix that.
MarketSizer analyses domain-level subscription signals like trial activations, renewals, and churn events, from external, non-personal sources. We enrich this with your CRM data (if connected), but never ingest personal fields like notes, deals, or tasks. All data is continuously refreshed, AI-ready, and filtered to match your ICP before entering your workflow.
We monitor subscription events, behaviour changes, and digital signals that indicate switching intent or usage drop-off, so you see risk (or opportunity) before it shows up in your pipeline.
Not at all. Most teams are up and running in under a week with no engineering help needed. We’ve prioritised ease of setup, data security, and CRM-first delivery.
Yes! You can launch MarketSizer’s Copilot without connecting your CRM. Start in your browser or LinkedIn, test live signals, and preview ready-to-send plays. When you’re ready to upgrade, you can enable CRM sync.