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How to build a SaaS sales pipeline with the right roles
Executive overview
Most SaaS companies leak revenue at every stage of the buyer journey without realising it. Small ratio improvements at each stage compound into 100%+ annual growth.
The fix starts with clarity on four distinct roles: SDR, BDR, AE, and CSM. Each owns a specific part of the pipeline. Mixing them up wastes headcount and kills throughput.
Mapping your full bow-tie funnel — from awareness to upsell — reveals where the waste is and what to fix.
The four pipeline roles defined
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Sales Development Rep (SDR) — handles inbound qualification. Engages leads from chat, email, and lead magnets. Executes the playbook to identify and qualify opportunities, then passes them forward.
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Business Development Rep (BDR) — owns outbound. Cold outreach to targeted accounts using account-based marketing. Dials, emails, and messages to open conversations, qualifies interest, then hands off to the sales team.
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Account Executive (AE) — the salesperson. Responsible from qualified opportunity through to signed contract or payment. Teaches buyers how to evaluate solutions, not just pitches. Call them "product specialists" externally — buyers want to be informed, not closed.
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Customer Success Manager (CSM) — owns post-sale. Connects the product to the customer's pain, drives activation, manages onboarding, renewals, and upsell. A revenue-generating role, not a support function.
Pipeline flow and the bow-tie funnel
- The funnel runs: awareness → consideration → purchase → activation → engagement → upsell
- Most teams only watch revenue numbers and miss stage-level conversion problems
- Small fixes (3% here, 5% there) across multiple stages stack into large revenue gains
- Audit each stage: define entry criteria, exit criteria, and track the ratios between them
What breaks when roles are unclear
- Marketing, sales, and customer success end up in conflict
- Salespeople sell to wrong-fit customers; CSMs absorb the fallout
- Language bleeds outward — calling reps "closers" internally means support staff use that word with buyers
- Comp plans and coaching misfire when responsibilities overlap
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