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HomeWorkflowsAI SDR Agent (Multi-Channel)
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AI SDR Agent (Multi-Channel)

Outbound SDR agent that researches, personalizes, and follows up across email, LinkedIn, and SMS — and classifies replies.

Setup difficulty: advanced
Recruiters
AgenticMulti-AgentAutonomous

The Problem

A human SDR sends 30-60 personalized emails a day before quality drops. The bottleneck isn't writing, it's research: figuring out who to contact and what hook works. An AI SDR stack (Clay for enrichment + Smartlead for sending + Lindy/n8n for orchestration) can run thousands of personalized sequences with reply classification — escalating only positive responses to a human. The pattern is now table-stakes for B2B agencies and any service firm with a defined ICP.

Best For

Marketing agenciesB2B SaaSRecruiting firmsConsultanciesCommercial service contractors

Workflow Steps

1

Define the ICP + qualifying signals

Specifics: industry, company size, role, geography, intent signals (hiring for X, just raised, using competitor tool). The narrower, the better the personalization downstream.

2

Build the enrichment waterfall in Clay

Source list from Apollo / LinkedIn Sales Navigator. Enrich each row with website summary, latest news, mutual connections, and a 1-line 'why now' hook generated by GPT-4 grounded in the enrichment data.

3

Generate personalized first-touch emails

Prompt the model with the enrichment payload. Output: 35-55 word email with one specific personalization line, one value prop, one soft CTA. Reject any email that doesn't pass a personalization check (unique line not present in 50%+ of sends).

4

Multi-channel sequence

Day 0 email → Day 3 LinkedIn connect (no note) → Day 5 follow-up email → Day 10 LinkedIn message → Day 14 break-up email. Throttle to 30 sends/day per inbox to protect deliverability.

5

Reply classification agent

Every reply gets routed to a classifier: positive (book meeting), question (auto-draft answer for human review), not now (move to nurture), unsubscribe (DNC). Only positives + complex questions hit a human.

6

Auto-book on positive

When the classifier sees a yes, the agent inserts a Calendly link OR proposes 3 specific times pulled from the rep's calendar. Confirms via reply, drops a calendar invite.

7

Weekly inbox + deliverability review

Monitor open rates, reply rates, spam-folder placement, sender reputation. Cool an inbox if open rate drops below 30%. Rotate inboxes and warm new ones continuously.

Copy-Paste Templates

Use these templates as-is or customize for your business.

First-Touch Email Prompt
You are writing a first-touch outbound email. Use this enrichment data: {{enrichment_json}}. Constraints: 35-55 words, one specific personalization line drawn from the data (not generic flattery), one value prop tied to a likely pain point for their role, one soft CTA (a question, not a meeting ask). Tone: peer-to-peer, no jargon, no exclamation marks. Output only the email body — no subject line, no signature.
Reply Classifier Prompt
Classify this reply into exactly one bucket: POSITIVE (interest, asking to learn more, asking for time), QUESTION (specific question that needs an answer before they'll commit), NOT_NOW (interested but bad timing), NOT_INTERESTED (polite no), UNSUBSCRIBE (asked to be removed), OOO (out of office). Reply text: {{reply_body}}. Output JSON: {"label": "...", "confidence": 0-1, "suggested_action": "..."}
Break-Up Email Template
Hi {{first_name}} — circling back one last time. If now isn't the right moment for {{value_prop}}, totally understood. I'll close the loop on my end. If anything changes, you have my email. — {{sender_first_name}}

More workflows like this — one per week

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Orchestration pattern

Multiple specialized agents collaborate: a router/orchestrator delegates to sub-agents (researcher, writer, classifier). Higher capability, more failure surface — invest in observability before scaling.

Learn the agentic glossary →

Failure modes & mitigations

Where this workflow tends to break in production — and what to put in place before you ship it.

Spam folder placement kills the campaign

Mitigation: Daily seed-list deliverability tests; cool inboxes that drop below 90% inbox placement.

Personalization line is generic

Mitigation: Programmatic dedup check against last 100 sends; reject if Jaccard similarity > 0.6.

When NOT to Use This

Do not run multi-channel outbound without monitored deliverability infrastructure (separate domain, warmed inboxes, SPF/DKIM/DMARC). Do not use for industries where cold email is restricted (healthcare, regulated finance to consumers). Skip if you can't handle 30+ inbound conversations/month — the bottleneck moves to your closer.

30-60-90 Day Implementation Plan

A phased approach to get this workflow running and delivering ROI.

Days 1–30

Foundation

  • Set up core tools and integrations
  • Configure basic workflow automation
  • Test with a small set of real scenarios
  • Train team on new process

Days 31–60

Optimization

  • Review initial results and adjust triggers
  • Add edge case handling
  • Connect additional data sources
  • Measure time saved vs. manual process

Days 61–90

Scale

  • Roll out to full team or all locations
  • Set up monitoring and alerts
  • Document SOPs for the automated workflow
  • Identify next workflow to automate

Estimate your ROI

A typical agency setup: 3 inboxes × 30 sends/day × 22 days = ~2,000 emails/month. At 1.5% positive reply rate = 30 sales conversations/month at near-zero per-conversation cost. Replaces or augments a $75K-95K SDR hire.

Drag the sliders to match your numbers
8 hrs
$35/hr
70%
Estimated annual impact
$8,992
≈ $749/month · Automating 70% of 8 hrs/week at $35/hr, net of ~$1,200/yr in tool costs.
Capture this $8,992 — free 15-min audit

Back-of-the-envelope estimate for AI SDR Agent (Multi-Channel). Real results depend on your customer base, offer, and implementation quality.

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Works For

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