MarketSizer & Lusha
Lusha wins the contact question: verified numbers on named people, fast. MarketSizer wins the account question: which companies are switching vendors, and when.
“Verified B2B Data and Buying Signals for GTM Teams.”
Source: lusha.com homepage
What each tool does well
Lusha
Best known for
A B2B contact-data platform with fast Chrome-extension lookups and strong people-movement tracking - who moved from where to where.
Useful for
SDR teams that need direct-dial mobile numbers and job-change alerts on named contacts, layered on top of a wider CRM or prospecting tool.
MarketSizer
Best known for
Subscription intelligence - accounts ranked by observable buying events (trials, switches, renewals, churn).
Useful for
GTM teams that want an account-level timing-signal layer on top of the contact data they already run.
Where Lusha is strong
- Fast, well-known Chrome extension for one-click contact lookups.
- People-movement tracking - alerts when a named contact changes company.
- Popular free tier that lets reps validate the product without procurement.
- Direct-dial mobile coverage that genuinely beats what most account-level tools carry.
- Native integrations across HubSpot, Salesforce, Outreach and the major sequencing tools.
Where they differ
Different jobs on the same pipeline - the overlap between Lusha and MarketSizer is smaller than a feature list suggests.
| Feature | Lusha | MarketSizer |
|---|---|---|
| Data coverage | ||
| B2B contact database (email, direct-dial) | Included | Email, phone and LinkedIn via built-in enrichment |
| People-movement / job-change alerts | Included | Not included |
| Historical subscription record per account | Not included | 70M+ records |
| Signals | ||
| Contact-level triggers (job change, hiring) | Included | Via partners |
| Subscription events (trial, switch, churn, renewal) | Intent and trigger signals instead | Included |
| Signal explainability at the event level | Anchored to the person, not the event | Included |
| Workflow | ||
| Chrome-extension side panel | Included | Included |
| Free tier | Included | Free trial |
| Two-way CRM sync | Included | HubSpot, Pipedrive and Zoho CRM |
MarketSizer pricing as published at marketsizer.io/pricing. Lusha 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 Spotted something out of date?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.
Where each tool earns its place
Lean on Lusha when
- Your primary bottleneck is direct-dial mobile numbers and verified email addresses on named contacts.
- People-movement tracking on your existing pipeline is a real workflow.
- You want a fast Chrome-extension lookup with a free tier so reps can validate before procurement.
- Your team already runs an accounts-database and needs the contact layer, not the account layer.
Add MarketSizer when
- You want account-level buying events (trials, switches, renewals, churn), not contact-level triggers.
- You already have a contact-data source and want an intelligence layer on top of it.
- You want the signal attached to a specific event on the account, not to a person.
- You need timing signals that fire while the buying window is still open, with the triggering event attached.
How MarketSizer works with Lusha
Lusha wins the contact question; MarketSizer wins the account question. One tells you how to reach a named person, the other tells you which company is worth reaching this week. Layered, the account decision comes first and the contact lookup follows it.
MarketSizer flags the in-market account
A competitor trial, a vendor switch or an approaching renewal puts the account at the top of the queue, with the evidence attached.
Lusha resolves the buying committee
Verified emails and direct dials for the people inside the flagged account - the contact layer Lusha is known for.
Both sync into the CRM
Each tool writes into a shared CRM such as HubSpot, so the account signal and the contact record land on the same object.
Reps open with the event
The subscription event gives the first call or email a reason to exist - relevance the contact data alone cannot supply.
What buyers say about the category
Themes from GTM leaders currently evaluating tools in this space.
Reps rate Lusha for exactly what it promises: a number that connects, found in one click, without a platform commitment. The conversation with us starts one level up. Contact data answers who to call once you know the account is worth calling. Which account, which quarter, and what changed to make now the moment - that is the question buyers bring to MarketSizer.
MarketSizer & Lusha - frequently asked questions
Is MarketSizer a replacement for Lusha?
For most teams, no. Lusha is a contact-data source with people-movement alerts; MarketSizer is an account-level timing-signal layer. Teams typically keep Lusha for direct-dial numbers and job-change tracking, and add MarketSizer for event-based buying signals on the account.
How is MarketSizer different from Lusha job-change alerts?
Job-change alerts fire when a specific person moves between companies. MarketSizer signals fire when something happens to the account - a trial started, a vendor switched, a renewal approaching. Different signal categories; teams often want both.
How do teams typically run Lusha and MarketSizer together?
MarketSizer surfaces which accounts are in a buying window; Lusha supplies the direct-dial numbers on the contacts inside those accounts. Push MarketSizer-flagged accounts into a Lusha list, run the contact lookup, then sequence.
Does MarketSizer include contact data like Lusha?
Yes. MarketSizer includes contact data - email, phone and LinkedIn details for the people inside a target account, enriched on demand alongside the account-level signals. The proprietary layer underneath is the subscription-event and buying-signal dataset rather than a static contact database, so most teams pair MarketSizer with Lusha or a similar tool as their primary contact source.
What does Lusha cost compared with MarketSizer?
Lusha publishes tiered pricing with a free plan and per-user paid tiers, as listed at lusha.com/pricing. MarketSizer is credit-based (see current plans), with no per-seat multiplier. The comparison is not clean per-user because the tools solve different problems.
See how MarketSizer works with your Lusha stack.
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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