Lemlist
Sales Engagement / OutreachLemlist is a multichannel sales engagement platform that enables sales teams to automate personalized cold email campaigns, LinkedIn outreach, and phone sequences at scale. It combines AI-powered personalization, deliverability tools, and a built-in lead database with deep CRM and automation integrations to help GTM teams book more meetings. Lemlist is widely used by SDRs, account executives, and growth marketers who want to run coordinated outreach across email and social channels without sacrificing personalization.
Overview
Capabilities
Multichannel Sequence Builder
Lemlist's sequence builder allows users to design outreach campaigns that combine multiple touchpoints — cold emails, LinkedIn connection requests, LinkedIn direct messages, phone call reminders, and custom manual tasks — into a single orchestrated flow. Each step can be triggered by time delays, prospect behavior (e.g., email opened but not replied), or CRM field conditions. This is lemlist's core differentiator for GTM teams running account-based outreach, as it eliminates the need for separate tools for email and LinkedIn prospecting. For SDR teams, this means a single campaign can attempt contact across three or more channels before marking a prospect as unresponsive, significantly increasing total reply rates compared to email-only sequences.
Dynamic Personalization Engine
Lemlist pioneered personalized image and video insertion in cold email, allowing senders to dynamically embed a prospect's name, company name, logo, or LinkedIn headshot into a custom-designed image template. Beyond visuals, lemlist supports text-based custom variables, AI-generated personalized icebreakers (pulled from LinkedIn profile data or company news), and liquid syntax-style conditional blocks. For GTM teams, this level of personalization at scale is critical — research consistently shows that highly personalized outreach achieves 2-3x higher reply rates than templated blasts. Lemlist's personalization layer works across email and LinkedIn message steps, ensuring consistency of message tone and relevance throughout the entire prospect experience.
Email Deliverability and Warm-Up (Lemwarm)
Lemlist includes Lemwarm, a dedicated email warm-up tool that automatically sends and replies to emails between lemlist users to build sender reputation for new or recovering domains. It also provides inbox placement monitoring, spam score analysis, and recommendations for fixing deliverability issues before launching campaigns. For revenue teams scaling cold outreach, deliverability is often the single biggest operational risk — a single spam complaint spike can damage a domain for months. Lemwarm's automated approach removes the manual effort of warm-up, while deliverability dashboards give RevOps teams visibility into domain health across all sending accounts in the workspace.
Native CRM Integrations (HubSpot, Salesforce, Pipedrive, Zoho, Attio)
Lemlist offers native two-way sync with major CRMs including HubSpot, Salesforce, Pipedrive, Zoho CRM, and Attio. These integrations allow sales teams to automatically push lemlist campaign activity — email opens, clicks, replies, LinkedIn engagement, calls logged — into CRM contact and deal records without manual data entry. Conversely, CRM triggers can enroll contacts into lemlist sequences based on lifecycle stage changes, deal stage movements, or custom field updates. For revenue operations professionals, this bidirectional sync is essential for maintaining a single source of truth in the CRM while running active outreach. Native integrations generally offer lower data latency and more reliable field mapping compared to Zapier-mediated connections.
LinkedIn Automation and Social Outreach
Lemlist's LinkedIn integration enables automated LinkedIn prospecting steps within multichannel sequences, including profile visits, connection request automation, and direct message sending — all without leaving the lemlist campaign builder. This is particularly valuable for GTM teams pursuing an email-first, social-reinforcement strategy where LinkedIn touchpoints serve as a warm-up or follow-up to email outreach. Users can configure LinkedIn steps to fire before, between, or after email steps based on engagement signals, creating a coordinated cross-channel narrative. Note that LinkedIn automation operates within lemlist's compliance guidelines, and teams should be aware of LinkedIn's own usage policy limits when configuring automation frequency and volume.
Reporting, Analytics, and Campaign Intelligence
Lemlist provides campaign-level and sequence-step-level analytics covering open rates, click rates, reply rates, bounce rates, unsubscribe rates, and meetings booked. Teams can A/B test email subject lines, body copy, personalization variables, and sequence step timing to optimize performance over time. At the workspace level, managers can compare performance across campaigns, senders, and lead sources to identify what messaging and sequences drive the most pipeline. For GTM leaders, these analytics inform not just outreach copy decisions but also ICP prioritization — high-reply-rate campaigns by segment reveal which target audiences are most receptive to outreach at any given moment.
API, Webhooks, and Custom Integration Layer
For development teams and technically sophisticated revenue operations professionals, lemlist offers a REST API and webhook system that enables fully custom integrations beyond what Zapier or n8n provide out of the box. The API supports programmatic management of campaigns, leads, and sequences, while webhooks allow external systems to receive real-time event notifications when prospects open emails, reply, click links, or complete sequence steps. This is particularly valuable for teams building custom CRM workflows, internal dashboards, or proprietary data pipelines that need outreach event data delivered in real time without polling. The lemlist API is available on higher-tier plans and is documented at lemlist's developer portal.
Setup Guide
Connect Your Email Provider to Lemlist
Before launching any campaigns or configuring integrations, connect your sending email account to lemlist. Lemlist supports Google Workspace (Gmail), Microsoft 365 (Outlook), and custom SMTP providers. Navigate to Settings > Email Accounts > Add Email Account and follow the OAuth flow for Google or Microsoft. For custom SMTP, enter your server credentials, port, and authentication details. It is strongly recommended to connect a domain-specific sending address (e.g., yourname@yourdomain.com) rather than a personal Gmail account, as this protects your primary domain reputation. Once connected, enable Lemwarm for the account and allow 2-4 weeks of warm-up before launching high-volume sequences.
// Custom SMTP configuration example
{
"smtp_host": "smtp.yourdomain.com",
"smtp_port": 587,
"smtp_user": "outreach@yourdomain.com",
"smtp_password": "your_app_password",
"smtp_secure": true,
"daily_sending_limit": 100
}Set Up Your Native CRM Integration (HubSpot, Salesforce, or Pipedrive)
Navigate to Settings > Integrations in your lemlist workspace to find the CRM integration panel. For HubSpot, click 'Connect HubSpot' and complete the OAuth authorization — lemlist will request permissions to read and write contacts, deals, and activities. For Salesforce, you will need your Salesforce instance URL and will authorize via Salesforce's OAuth flow; ensure your Salesforce user has API access enabled. For Pipedrive, generate an API key in Pipedrive under Settings > Personal Preferences > API and paste it into lemlist's Pipedrive integration panel. After connecting, configure field mappings to ensure lemlist activity data (open, click, reply events) maps to the correct CRM properties. Enable two-way sync to allow CRM lifecycle stage changes to trigger lemlist sequence enrollment.
// Example: Lemlist-HubSpot field mapping configuration
{
"lemlist_field": "email_opened",
"hubspot_property": "hs_email_last_open_date",
"sync_direction": "lemlist_to_hubspot"
},
{
"lemlist_field": "replied",
"hubspot_property": "hs_sales_email_last_replied",
"sync_direction": "lemlist_to_hubspot"
}Configure LinkedIn Integration for Multichannel Sequences
To enable LinkedIn steps in your sequences, navigate to Settings > Integrations > LinkedIn and install the lemlist Chrome extension. The extension creates a secure bridge between your LinkedIn session and the lemlist sequence engine, allowing lemlist to automate profile visits, connection requests, and message steps via your LinkedIn account. Once installed, log in to LinkedIn in the same Chrome browser session. In the sequence builder, you can now add LinkedIn steps between or after email steps. Best practice is to place a LinkedIn profile visit step before the first email (as a warm-up signal), a connection request step after the first email if no reply is received, and a LinkedIn message step as a final touchpoint. Do not automate more than 20-30 LinkedIn actions per day to stay within LinkedIn's acceptable usage guidelines.
// Recommended multichannel sequence step order
Step 1: Email (Day 0) — Personalized intro email
Step 2: LinkedIn Profile Visit (Day 1) — Automated, no message
Step 3: Email Follow-Up (Day 3) — Reference LinkedIn visit subtly
Step 4: LinkedIn Connection Request (Day 5) — With personalized note
Step 5: Email Follow-Up 2 (Day 7) — Value-focused
Step 6: LinkedIn Message (Day 10) — After connection accepted
Step 7: Final Email (Day 14) — Break-up emailSet Up Webhooks for Real-Time Event Delivery
For teams that need real-time outreach data in external systems — such as a custom CRM, internal Slack bot, or proprietary data warehouse — lemlist's webhook system is the most reliable approach. Navigate to Settings > API & Webhooks > Webhooks and add a new webhook endpoint. Specify the destination URL (your server or a service like webhook.site for testing) and select the events you want to subscribe to: email.opened, email.clicked, email.replied, email.bounced, campaign.completed, and linkedin.connected are the most commonly used. Lemlist will POST a JSON payload to your endpoint in real time when each event fires. Ensure your endpoint returns a 200 status within 5 seconds to prevent retry loops. Use webhook signature verification (available in the payload headers) to authenticate incoming requests.
// Example lemlist webhook payload (email.replied event)
{
"event": "email.replied",
"campaign_id": "camp_abc123",
"lead_id": "lead_xyz789",
"lead_email": "prospect@company.com",
"campaign_name": "Q4 Outbound - Enterprise",
"replied_at": "2024-11-15T14:32:00Z",
"sequence_step": 2,
"sender_email": "yourname@yourdomain.com"
}Build Automation Workflows with Zapier or n8n
For teams without developer resources, Zapier and n8n provide a no-code/low-code layer for connecting lemlist to tools that lack native integrations. In Zapier, search for the lemlist app and choose a trigger (e.g., 'New Activity in Lemlist' or 'Lead Replied') paired with an action in your destination tool (e.g., 'Create Task in Asana', 'Send Message in Slack', or 'Add Row in Google Sheets'). For n8n, use the lemlist node available in the n8n marketplace, which supports triggers and actions across campaigns and leads. Key automation templates include: notifying a Slack channel when a prospect replies, creating a CRM deal when a prospect clicks a specific link, adding replied leads to a Google Sheet for manual review, and triggering a Calendly meeting link follow-up when an email is opened three times without reply. Note that Zapier-mediated integrations typically have a 5-15 minute data latency compared to near-real-time native integrations, which is important for time-sensitive sales workflows.
// n8n workflow JSON snippet: Lemlist reply → Slack notification
{
"nodes": [
{
"name": "Lemlist Trigger",
"type": "n8n-nodes-base.lemlistTrigger",
"parameters": {
"event": "email.replied"
}
},
{
"name": "Slack Message",
"type": "n8n-nodes-base.slack",
"parameters": {
"channel": "#sales-replies",
"text": "🎉 {{$node['Lemlist Trigger'].json['lead_email']}} replied to campaign: {{$node['Lemlist Trigger'].json['campaign_name']}}"
}
}
]
}Prevent Contact Duplication When Syncing Multiple CRMs
One of the most common operational pain points for growing sales teams is contact duplication when lemlist is connected to two or more CRMs simultaneously — for example, both HubSpot and Salesforce are active. To prevent this, establish a single CRM as the 'master' record system and configure lemlist to write activity data only to that CRM natively. For the secondary CRM, use a middleware layer (Zapier, n8n, or a RevOps data router like Maestro) to receive lemlist webhook events and deduplicate records using email address as the unique key before writing to the second system. Additionally, in lemlist's campaign settings, use the 'Check for existing contacts' option before importing lead lists to prevent the same prospect from being enrolled in multiple active campaigns simultaneously. Establish a clear naming convention for campaign tags that reflects CRM source, so you can filter and audit contact overlap in lemlist's reporting view.
// Deduplication check logic (pseudo-code for RevOps middleware)
ON lemlist_webhook_event RECEIVED:
email = event.lead_email
hubspot_contact = hubspot.getContactByEmail(email)
salesforce_lead = salesforce.getLeadByEmail(email)
IF hubspot_contact EXISTS:
hubspot.updateActivity(hubspot_contact.id, event)
// Do NOT create duplicate in Salesforce
ELSE IF salesforce_lead EXISTS:
salesforce.updateActivity(salesforce_lead.id, event)
// Do NOT create duplicate in HubSpot
ELSE:
// Net new contact — create in master CRM only
hubspot.createContact(event.lead_email, event)API Highlights
/api/v1/campaignsRetrieve a list of all campaigns in the lemlist workspace, including campaign IDs, names, status (active, paused, completed), and basic performance metrics. This endpoint is useful for programmatically monitoring campaign health, building internal dashboards, or syncing campaign metadata into external analytics tools like Maestro or a BI platform.
GET https://api.lemlist.com/api/campaigns
Authorization: Bearer YOUR_API_KEY
Response:
{
"campaigns": [
{
"_id": "camp_abc123",
"name": "Q4 Outbound - Enterprise",
"status": "active",
"sendingVolume": 450,
"openRate": 0.52,
"replyRate": 0.08
}
]
}/api/v1/campaigns/{campaignId}/leadsAdd one or more leads to a specific lemlist campaign programmatically. This is the primary endpoint used by RevOps engineers to pipe leads from enrichment tools (Clay, Apollo, Clearbit), CRMs, or internal databases directly into lemlist sequences without using the CSV import UI. Supports custom variable injection at the time of lead addition, enabling fully automated personalization pipelines.
POST https://api.lemlist.com/api/campaigns/camp_abc123/leads
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json
{
"email": "prospect@targetcompany.com",
"firstName": "Jane",
"lastName": "Smith",
"companyName": "Target Co",
"customVariable1": "Congrats on your Series B!",
"linkedinUrl": "https://linkedin.com/in/janesmith"
}/api/v1/campaigns/{campaignId}/leads/{email}Remove a specific lead from a campaign by their email address. This is critical for real-time unsubscribe and opt-out management — when a prospect replies requesting removal or a CRM marks a contact as 'Do Not Contact', this endpoint allows automated removal from active sequences without manual intervention. Should be triggered immediately via webhook or CRM automation to ensure compliance.
DELETE https://api.lemlist.com/api/campaigns/camp_abc123/leads/prospect@targetcompany.com
Authorization: Bearer YOUR_API_KEY
Response: 200 OK
{
"message": "Lead removed from campaign successfully"
}/api/v1/activitiesRetrieve a paginated list of all outreach activities across campaigns — including email sends, opens, clicks, replies, bounces, and LinkedIn events. This endpoint is the foundation for building custom reporting layers, feeding data into CRM activity logs, or syncing outreach engagement data into platforms like Maestro for cross-channel attribution analysis. Supports filtering by campaign ID, date range, and activity type.
GET https://api.lemlist.com/api/activities?campaignId=camp_abc123&type=emailReplied&since=2024-11-01
Authorization: Bearer YOUR_API_KEY
Response:
{
"activities": [
{
"type": "emailReplied",
"leadEmail": "prospect@company.com",
"campaignId": "camp_abc123",
"timestamp": "2024-11-10T09:15:00Z",
"sequenceStep": 2
}
]
}/api/v1/leads/{email}/unsubscribeGlobally unsubscribe a lead from all current and future lemlist campaigns in the workspace. Unlike the campaign-level DELETE endpoint, this global unsubscribe ensures the lead will not be re-enrolled in any campaign — an essential compliance function for GDPR, CAN-SPAM, and CASL adherence. Should be integrated with CRM opt-out workflows to trigger automatically when a contact's communication preference is updated.
POST https://api.lemlist.com/api/leads/prospect@targetcompany.com/unsubscribe
Authorization: Bearer YOUR_API_KEY
Response: 200 OK
{
"email": "prospect@targetcompany.com",
"unsubscribed": true,
"timestamp": "2024-11-15T11:00:00Z"
}/api/v1/webhooksRegister a new webhook endpoint to receive real-time event notifications from lemlist. Supported events include emailSent, emailOpened, emailClicked, emailReplied, emailBounced, linkedinVisited, linkedinConnected, and campaignCompleted. This endpoint is the entry point for building custom real-time integrations — for example, triggering an immediate Slack alert, updating a CRM field, or starting a new workflow in Maestro when a key outreach event occurs.
POST https://api.lemlist.com/api/webhooks
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json
{
"url": "https://yourserver.com/lemlist-webhook",
"events": ["emailReplied", "emailBounced", "linkedinConnected"],
"secret": "your_webhook_secret_for_verification"
}Use Cases
Enterprise SDR Team: HubSpot-Synced Multichannel Outbound Sequences
A B2B SaaS company's SDR team uses lemlist as the execution layer for their outbound motion, with HubSpot as the CRM of record. The RevOps team configures the lemlist HubSpot integration to trigger campaign enrollment automatically when a HubSpot contact reaches 'MQL' lifecycle stage. Lemlist then executes a 7-step multichannel sequence: two cold emails, a LinkedIn profile visit, a connection request, a LinkedIn message, a follow-up email, and a final break-up email over 14 days. Every activity — email opens, link clicks, LinkedIn connections, replies — is pushed back into HubSpot as timeline events on the contact record, and a reply automatically moves the contact to 'SQL' stage and creates a deal in the pipeline. The sales manager monitors reply rates and meeting bookings via lemlist's campaign analytics and HubSpot's pipeline dashboards simultaneously. This integration eliminates manual CRM data entry, ensures pipeline hygiene, and allows SDRs to focus entirely on reply handling and discovery calls rather than administrative tasks. The Maestro platform sits above this stack, providing GTM leaders with cross-campaign attribution and sequence performance benchmarking across the entire outbound program.
Growth Agency: Multi-Client Campaign Management with Zapier Automation
A B2B demand generation agency manages outreach campaigns for eight different clients simultaneously using lemlist. Each client has a separate lemlist workspace (or sub-workspace), and the agency uses Zapier to connect lemlist to each client's preferred CRM — some on Salesforce, others on Pipedrive, and one on Zoho CRM. When a prospect replies in any campaign, Zapier fires a multi-step workflow: it logs the reply in the client's CRM, sends a Slack notification to the client's dedicated Slack channel (leveraging the lemlist Slack integration pattern), and adds a row to a Google Sheet that the agency uses for weekly reporting. This architecture allows the agency to standardize their campaign operations in lemlist while remaining flexible on the downstream CRM side. For the Salesforce clients, the agency uses lemlist's native Salesforce integration for higher data fidelity and lower latency, reserving Zapier only for tools where no native integration exists. The agency also uses lemlist webhooks to trigger a custom-built client portal dashboard that updates in real time as campaign events fire.
Revenue Operations: Solving Contact Duplication Across HubSpot and Salesforce
A mid-market technology company uses both HubSpot (for marketing automation) and Salesforce (for sales pipeline management) simultaneously — a common scenario for companies that migrated CRMs mid-growth and run both systems in parallel. Their RevOps team connects lemlist's webhook system to a middleware logic layer built in n8n that serves as the deduplication router. When lemlist fires an event (email opened, replied, clicked), the n8n workflow queries both HubSpot and Salesforce via their APIs using the prospect's email address as the unique key. If the contact exists in HubSpot, the activity is written to HubSpot only. If the contact exists in Salesforce, it goes to Salesforce. If the contact exists in both, the activity is written to whichever system holds the 'owner' field matching the lemlist campaign's assigned sender. Net-new contacts discovered through outreach are created only in Salesforce (the designated system of record for sales contacts). This architecture prevents duplicate contact records, eliminates conflicting activity logs, and maintains a clean pipeline view in Salesforce without requiring manual RevOps oversight of individual records. The entire deduplication workflow runs in under 30 seconds per event, far faster than any Zapier-mediated alternative.
Account-Based Marketing: LinkedIn-First Multichannel Sequences for Enterprise Accounts
An enterprise software company's ABM team uses lemlist to execute coordinated outreach into target accounts where multiple stakeholders must be engaged before a deal can progress. For each target account, they build lemlist campaigns that start with LinkedIn profile visits across all identified stakeholders — creating awareness that the company's rep is paying attention before any email is sent. Three days after the profile visit, personalized cold emails go out referencing a relevant company trigger (e.g., recent funding, product launch, or executive hire), with a dynamic personalized image that includes the prospect's company logo overlaid on a custom background. If no reply comes within five days, a LinkedIn connection request fires with a personalized note. After connection is accepted, a LinkedIn direct message reinforces the email's value proposition with a different angle. This orchestrated approach — profile visit, email, connection request, message — mimics the natural social sales motion that enterprise buyers expect from vendors targeting them thoughtfully. The team tracks which LinkedIn touchpoints correlate with reply rate spikes using lemlist's step-by-step analytics, continuously refining step timing and messaging to improve conversion rates across their ABM account list.
Developer-Led Integration: Custom Pipeline Using Lemlist API and Webhooks
A scale-up company with a dedicated sales engineering team builds a fully custom integration between lemlist and their proprietary internal CRM — one that no native integration or Zapier template could support. Using the lemlist REST API, their engineers programmatically create campaigns, add leads with custom variables populated from their internal product database (e.g., the prospect's current usage tier of a competitor's tool), and monitor campaign status. Real-time webhook events from lemlist are consumed by a Node.js microservice that writes engagement data directly to their internal CRM, triggers internal Slack alerts for high-priority reply events (enterprise prospects), and updates a revenue operations dashboard built on Metabase. When a prospect replies indicating interest, the webhook also triggers an automated calendar availability email via Calendly's API, dramatically reducing the time-to-meeting for hot leads. This fully custom integration — not possible through any third-party automation platform — gives the team complete control over data latency, field mapping, and workflow logic, and serves as the foundation for their AI-driven lead prioritization model that surfaces the best reply opportunities for senior AEs each morning.
Frequently Asked Questions
Does lemlist integrate with HubSpot?
Does lemlist integrate with Zoho CRM?
What is lemlist's reputation among sales teams?
What are the best practices for using lemlist integrations effectively?
Which lemlist integrations are available on the free trial vs. paid plans?
How does the lemlist Slack integration work?
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