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Lead, MQL, SAL, SQL, opportunity: the definitions, straight, and their translation into Salesforce

Clément Richard · Founder, Amplee • • 9 min read

Ask your marketing and your sales teams what a "qualified lead" is: you will get two answers, sometimes three. That is not a tooling problem, it is a definitions problem - and it is expensive, because every poorly defined stage is a place where the pipeline leaks without anyone seeing it. Here are the reference definitions, where they diverge, and how to set them up in Salesforce.

01The definitions table

StageDefinitionWho owns itTransition criterionIn Salesforce
LeadA person or company that has shown interest but is not yet a customer (Salesforce definition). At HubSpot, distinct from a mere subscriber: they have acted beyond signing up.MarketingForm, event, identified interactionLead object, Status field; the link to the campaign goes through the campaign member
MQLMarketing Qualified Lead: a lead that marketing deems more likely to become a customer (HubSpot). Stage 2 of the SiriusDecisions/Forrester "demand waterfall".MarketingScore or high-intent behavior: demo request, pricing pages, score thresholdNo native "MQL" status: a Lead Status value to create; the score can come from Einstein Lead Scoring
SALSales Accepted Lead: the lead that sales has formally agreed to work (Forrester). Absent at HubSpot and in native Salesforce.SalesExplicit acceptance, ideally under a service-level agreementStatus value (e.g. "Working") + change of lead owner
SQLSales Qualified Lead: a verified prospect, ready for a direct sales conversation (HubSpot).Sales (shared responsibility for the criteria)Qualification confirmed by sales"Qualified" status then conversion
OpportunityAn identified deal, with an amount and a close date.SalesLead conversion - irreversibleConversion creates an account and a contact (mandatory) and, optionally, an opportunity; stages with probability and forecast category
CustomerAt least one deal won (HubSpot).Sales → Customer SuccessDeal closed wonClosed Won opportunity; the account becomes a customer

02Where the sources disagree

  • Does the SAL exist? Yes at Forrester/SiriusDecisions, where acceptance by sales is a stage in its own right. No at HubSpot, nor in native Salesforce. Our reading: the SAL is only useful if you measure a service-level agreement between marketing and sales - otherwise it is one more status nobody fills in.
  • Who owns the MQL? Marketing identifies it, but HubSpot insists: the move to SQL is a shared responsibility, with criteria written together. An MQL defined by marketing alone is the first cause of "your leads are worthless".
  • The unit of analysis. HubSpot and Salesforce reason by individual (contact or lead). Forrester's "Demand Unit Waterfall" (2017) reasons by buying group - the set of people who organize around a need. In complex B2B, a lead is never alone: the account is the real unit.
  • Where the model stops. The classic funnel ends at won. HubSpot's flywheel (attract, engage, delight) and Winning by Design's bowtie - seven stages, from discovery to expansion, published as a "standard" in January 2026 - continue after signature: onboarding, impact, expansion. For a recurring model, it is the only reading that holds up.
A status that two teams define differently is not a status. It is a disagreement stored in a field.

03What Salesforce provides natively

  • The lead and its conversion. Conversion creates an account and a contact, an opportunity if you wish, and it is irreversible: the converted lead can no longer be viewed without a dedicated permission. That is the natural boundary between marketing and sales - not to be crossed too early.
  • Lead statuses. The default values are deliberately generic (open, contacted, qualified, unqualified): there is no native "MQL" or "SAL". It is up to you to set them - and to write the criterion for each.
  • Opportunity stages. Ten default stages, from prospecting (10%) to negotiation (90%) then closed won (100%) / lost (0%), each with a type, a probability and a forecast category; a sales process is a filtered list of these stages per deal type. The default probabilities are not yours: calibrate them on your history.
  • Campaign member statuses. Defined campaign by campaign, with a default status and a "responded" checkbox that feeds responses. Our advice: one set of statuses per campaign type (webinar, trade show, emailing), not a universal set.
  • Einstein Lead Scoring. A conversion score computed by similarity with your converted leads, refreshed regularly; included in the Performance and Unlimited editions, an add-on on Enterprise. Useful for prioritizing - it does not replace an MQL definition, it feeds it.
0native "MQL" status: it is a definition to write, then to configure
10default opportunity stages - to be calibrated on your history
7stages in the bowtie: the funnel no longer stops at signature

04Our method for getting things straight

  • One stage = one observable criterion, written down, verifiable in the data. "The rep thinks it's hot" is not a criterion.
  • One owner per stage, and a service-level agreement at the handover: time to pick up an MQL, mandatory rejection reason.
  • As few stages as possible. Every added stage is a field somebody will not fill in. If the SAL is not measured, remove it.
  • The account as the unit in complex B2B - several leads from the same company are one signal, not three.
  • Keep going after won. Onboarding, adoption, expansion: if your revenue is recurring, so is your pipeline.

05Going further

These definitions are the foundation of RevOps: RevOps: definition, scope, KPIs. And for the downstream part of the flow: Quote-to-Cash: the 7 steps. Want to see where your pipeline leaks? Our Health Check starts exactly there - or write to us.

Go further

Our Sales Cloud & RevOps expertise

Scope, method, references: the expertise page details how we put this subject into practice for our clients.