Real-time
Two-way sync
Changes in Intercom or Lemlist instantly reflect in both systems. No stale data, no manual imports.
CRM ⇄ Business productivity
Intercom to Lemlist integration — real-time, two-way sync
Keep Intercom and Lemlist in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
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Migrated from MuleSoft
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Intercom and Lemlist
Sync what happens in Lemlist with the customer records in Intercom, in real time and in both directions.
The CRM is supposed to be the record of every customer relationship, but customer-relevant information also accumulates in the other tools a team runs. Whatever Lemlist holds or produces that touches a customer, whether conversations, payments, replies, enriched data, or notes, the CRM only benefits if it arrives without someone copying it over.
Stacksync connects Leads, Activities, Unsubscribes, Webhooks in Lemlist to Custom Data Attributes, Tags, Segments, Admins & Teams in Intercom with bi-directional, real-time sync. Activity and record changes in Lemlist update the matching contact or account in Intercom, and CRM data flows the other way wherever Lemlist can store and use it.
Common use cases
- 01 Propagate unsubscribes and bounces back to the CRM and other outreach tools for suppression compliance
- 02 Stop or pause sequences automatically when a reply converts to a deal in the CRM
- 03 Push product usage events from an application database into Intercom to trigger onboarding and retention messages
- 04 Mirror conversations and tickets into a warehouse for support analytics and SLA reporting
Common sync patterns
Where Lemlist runs outreach
Prospects, sends, and replies sync into Intercom, keeping lead status current without manual imports.
Where Lemlist supplies contact or company data
Enriched fields land directly on records in Intercom, and refreshes keep them from going stale.
Where Lemlist can store CRM context: fields kept current
Owner, lifecycle stage, or account details from Intercom sync into Lemlist, so people working there have the context without switching tools.
What you can sync between Intercom and Lemlist
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Intercom objects | Lemlist objects | How this pairing syncs | |
|---|---|---|---|
| Companies Company records group contacts and carry plan and account attributes used in segmentation. | Webhooks Hook subscriptions define which activity events are pushed to external endpoints. | Companies is specific to Intercom and Webhooks to Lemlist — each maps to any object or custom field on the other side. | |
| Conversations Support and sales threads sync outward for analytics and CRM context. | Team Members Sender and seat records map outreach activity to reps in other systems. | Conversations is specific to Intercom and Team Members to Lemlist — each maps to any object or custom field on the other side. | |
| Tickets Structured ticket records track issues alongside conversational threads. | Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. | Tickets is specific to Intercom and Campaigns to Lemlist — each maps to any object or custom field on the other side. | |
| Data Events Behavioral events pushed in from product databases trigger messages and flows. | Leads Per-campaign prospect records sync in from enrichment sources and back out with status. | Data Events is specific to Intercom and Leads to Lemlist — each maps to any object or custom field on the other side. | |
| Custom Data Attributes Typed custom fields on contacts and companies hold synced billing and usage data. | Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. | Custom Data Attributes is specific to Intercom and Activities to Lemlist — each maps to any object or custom field on the other side. | |
| Tags Labels applied to contacts, companies, and conversations sync for routing and reporting. | Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. | Tags is specific to Intercom and Unsubscribes to Lemlist — each maps to any object or custom field on the other side. |
How changes propagate between Intercom and Lemlist
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Intercom Lemlist Sub-second propagation
DetectionIntercom notifies Stacksync of record changes through webhook events. Webhook topic subscriptions for contact, company, and conversation events, plus polling for backfill.
DeliveryEach detected change is written to Lemlist through its API, with automatic retries and rate-limit backoff.
Lemlist Intercom Sub-second propagation
DetectionLemlist notifies Stacksync of record changes through webhook events. Webhooks on outreach activity events, plus polling.
DeliveryEach detected change is written to Intercom through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Intercom: Subject to per-app rate limits on the Intercom API.
- Lemlist: Subject to the platform's API rate limits.
What ships with Intercom ⇄ Lemlist
Connect Intercom and Lemlist for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Intercom–Lemlist connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Intercom or Lemlist data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Intercom or Lemlist record.
Observability
Monitoring
Track your Intercom ⇄ Lemlist sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Intercom and Lemlist.
How the Intercom and Lemlist connectors work
Intercom
- Integration surface
- REST API
- Authentication
- OAuth 2.0 for public apps or a workspace access token
- Change detection
- Webhook topic subscriptions for contact, company, and conversation events, plus polling for backfill
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to per-app rate limits on the Intercom API
Lemlist
- Integration surface
- REST API
- Authentication
- API key
- Change detection
- Webhooks on outreach activity events, plus polling
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits
How it works
How to connect Intercom to Lemlist — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Intercom and Lemlist with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Intercom
connected
Lemlist
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Intercom and Lemlist objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Intercom ⇄ LemlistCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Intercom LemlistCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Intercom and Lemlist integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Intercom and Lemlist: authenticate both systems, choose the objects to sync (such as Intercom's Companies and Conversations), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Common patterns for Intercom and Lemlist: Where Lemlist runs outreach; Where Lemlist supplies contact or company data; Where Lemlist can store CRM context: fields kept current. Prospects, sends, and replies sync into Intercom, keeping lead status current without manual imports.
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Intercom: REST API. Authentication: OAuth 2.0 for public apps or a workspace access token. Lemlist: REST API. Authentication: API key. Stacksync manages authentication, retries, and rate limits on both sides.
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Lemlist: Activity events such as replies, opens, bounces, and unsubscribes can be delivered via webhooks, enabling near real-time updates to CRM records without polling every campaign. Intercom: Webhook topics cover contact, company, conversation, and ticket lifecycle events, making event-driven sync practical. Stacksync's field mapping accounts for these differences between Intercom and Lemlist without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Intercom and Lemlist records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Intercom and Lemlist connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Intercom–Lemlist integration in-house.
SECURITY
Security teams trust Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
Related integrations
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Intercom ⇄ Twilio -
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Lemlist ⇄ Insightly -
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