Most of your market isn't worth calling today. We show you the part that is.

MarketSizer is subscription intent data for B2B software vendors. We show which companies are actively in-market to buy your product, qualified across three dimensions: ICP fit (do they match the tech stack and competitive profile of your best customers), purchase intent (are they running an active trial, churn, or renewal signal right now), and win probability (are they in a scenario where you historically win). Instead of guessing who to target, your team sees which companies are trialling your competitors right now, which recently churned from incumbents and are evaluating alternatives, and which match the profile of customers you historically win. The data covers 50M+ companies and 200+ SaaS vendors across 250+ products, refreshed daily with a 5-day max detection lag.

Most intent platforms score behavioural signals - website visits, content downloads, ad engagement, keyword surges - and infer buying intent from them. MarketSizer scores subscription intelligence instead: which software companies actually run today, when they start trials of alternatives, and how they have switched historically. Every signal is inspectable, so a rep can see the exact event a score is built on - a trial started on a competing vendor, a churned subscription, an approaching renewal window - not a black-box aggregate. The dataset spans 50M+ companies, 200+ vendors, and 70M+ historical subscription outcomes, with a 5-day max detection lag and ~90% accuracy on active trials and competitive switches. If a page-view score does not tell you why an account showed up, MarketSizer will.

B2B software vendors whose buyers evaluate competitors before they buy. We are built first for customer support and live chat vendors - companies like Zendesk, Intercom, Freshdesk, LiveChat, Crisp, and Gorgias - and expanding across ITSM (ServiceNow, Freshservice, Jira Service Management), CRM (HubSpot, Salesforce, Pipedrive), marketing automation, and sales enablement. The signal quality holds across categories where buyers make a definitive subscription decision, so the platform is used by sales teams (AEs, SDRs/BDRs, RevOps, leaders), marketing teams (demand gen, ABM, ops), and customer success teams (retention, expansion, at-risk detection). If your GTM motion depends on catching accounts inside a real evaluation window instead of at the top of a content funnel, MarketSizer is designed for you.

MarketSizer tracks 50M+ companies across 200+ vendors and 250+ distinct product offerings, with 17M+ active subscriptions monitored and 70M+ historical subscription outcomes underneath every score. Detection accuracy on active trials and competitive switching moments sits at approximately 90%, with 140+ countries covered and a 5-day maximum detection lag. Every score is inspectable - you can see exactly which subscription events drove a result, when they were detected, and how the ICP, intent, and win-probability sub-scores rolled up. Data refreshes daily from a 285M+ record BigQuery pipeline. That inspectability is the point: a rep can reference a specific competitor trial or renewal window in outreach, not an abstract 'high intent' flag.

No. Every account starts with 500 free credits, no credit card and no time limit. In practice, 500 credits is enough to spot roughly 500 opportunities in your market - identify which accounts are in-market right now, test the accuracy of the data against your own book, and validate that qualified opportunities convert better than your current lists. Identifying an opportunity costs 1 credit, activating a five-star one costs around 100 credits (approximately €10), and half of the activation fee is deferred until the opportunity converts, so you only pay full price once you win. Most teams know within 2 to 3 weeks whether MarketSizer is delivering value before any card is required.