Stop prospecting blind. Start every day knowing who to call.
MarketSizer gives you a daily ranked feed of accounts that match your ICP, are actively evaluating right now, and have the highest probability of becoming your next closed deal.
Built for the daily workflow of SDR and AE teams across CX, ITSM, CRM, and SaaS vendors
You already know this is broken
Your outreach list is built on firmographics and gut feel. Half the accounts you call are not buying. The other half already picked someone else.
You are calling accounts that are not in-market
Without real-time evaluation signals, you are working a static list. Some accounts renewed three months ago. Others have no budget cycle until next year. You have no way to know.
Your best opportunities go to the fastest competitor
When an account starts evaluating, the first vendor with relevant context wins the first meeting. If you find out a week later through intent data, you are already behind.
Every account on your list looks the same
Company size and industry are not priority signals. An account with a renewal next month and an active competitive trial should be at the top of your list - but nothing tells you that.
Intelligence that makes every call count
Opportunity Discovery
Every account in your market scored by ICP fit, live purchase intent, and scenario-specific win probability. Your list refreshes daily based on real evaluation signals, not stale firmographic data.
Learn more →Evaluation Signals
Know the moment an account starts trialling a competitor. See which vendor, how far into the process, and when the decision window closes - so you reach them while they are still open.
Learn more →Opportunity Score
Every account ranked by a composite score that weights ICP match (40%), purchase intent (35%), and win likelihood (25%). ACV estimates show what each deal is worth.
Learn more →Open MarketSizer and see exactly who to call today
Every morning, your opportunity feed is refreshed with accounts ranked by Opportunity Score. The accounts at the top have the highest combination of ICP fit, active evaluation signals, and historical win probability.

Signal-driven sequences built around each account's moment
Outreach orchestration generates personalised messages referencing the exact signal - the vendor being evaluated, the renewal timeline, the switching history. Push to your CRM or prospect via Chrome Extension.

MarketSizer for SDRs and AEs - frequently asked questions
MarketSizer gives sales reps a daily ranked feed of accounts that match your ICP, are actively evaluating right now, and have the highest probability of becoming your next closed deal. Every morning, the top of the feed shows the accounts with the strongest combination of fit, intent, and historical win likelihood.
Your market is mapped.
Your opportunities are waiting.
15 minutes. No commitment. We'll show you the accounts in your market that are actively evaluating right now.
No credit card · Tailored to your ICP · Live data, not a slide deck