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CRM ⇄ Business productivity

Close to Lemlist integration — real-time, two-way sync

Keep Close 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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Why teams connect Close and Lemlist

Sync what happens in Lemlist with the customer records in Close, 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 Webhooks, Team Members, Campaigns, Leads in Lemlist to Tasks, Custom Activities, Custom Fields, Users in Close with bi-directional, real-time sync. Activity and record changes in Lemlist update the matching contact or account in Close, and CRM data flows the other way wherever Lemlist can store and use it.

Common use cases

  • 01 Mirror campaign performance data into BI tools for outbound reporting across senders
  • 02 Sync replies, opens, and bounces from Lemlist into the CRM so outbound activity shows on lead and contact records
  • 03 Write product usage or firmographic data from an internal database onto Close lead custom fields to prioritize follow-up.
  • 04 Sync Close leads and opportunities into Postgres or a warehouse for pipeline reporting outside Close's built-in reports.

Common sync patterns

Where Lemlist can store CRM context: fields kept current

Owner, lifecycle stage, or account details from Close sync into Lemlist, so people working there have the context without switching tools.

Where Lemlist runs outreach

Prospects, sends, and replies sync into Close, keeping lead status current without manual imports.

Where Lemlist supplies contact or company data

Enriched fields land directly on records in Close, and refreshes keep them from going stale.

What you can sync between Close 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.

Close objects Lemlist objects How this pairing syncs
Leads The top-level record in Close; represents a company and holds its contacts, opportunities, and activity history. Leads Per-campaign prospect records sync in from enrichment sources and back out with status. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Activities Calls, emails, SMS, notes, and meetings logged against a lead; the source for engagement analytics. Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Contacts People nested under a lead, with emails and phone numbers used for outreach syncs. Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. Contacts is specific to Close and Unsubscribes to Lemlist — each maps to any object or custom field on the other side.
Opportunities Deal records with value, confidence, and status; commonly synced to reporting and billing systems. Webhooks Hook subscriptions define which activity events are pushed to external endpoints. Opportunities is specific to Close and Webhooks to Lemlist — each maps to any object or custom field on the other side.
Tasks Follow-up items assigned to users; synced for workload and SLA reporting. Team Members Sender and seat records map outreach activity to reps in other systems. Tasks is specific to Close and Team Members to Lemlist — each maps to any object or custom field on the other side.
Custom Activities User-defined activity types with their own custom fields, mapped like standard activities. Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. Custom Activities is specific to Close and Campaigns to Lemlist — each maps to any object or custom field on the other side.

How changes propagate between Close 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.

Close Lemlist Sub-second propagation

DetectionClose notifies Stacksync of record changes through webhook events. Webhook subscriptions for record events, with polling on date_updated fields for backfills.

DeliveryEach detected change is written to Lemlist through its API, with automatic retries and rate-limit backoff.

Lemlist Close 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 Close through its API, with automatic retries and rate-limit backoff.

Rate-limit considerations

  • Close: Subject to per-endpoint rate limits communicated in response headers.
  • Lemlist: Subject to the platform's API rate limits.
What ships with Close ⇄ Lemlist

Connect Close and Lemlist for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Close–Lemlist connection.

Real-time

Two-way sync

Changes in Close or Lemlist instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Close 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 Close or Lemlist record.

Observability

Monitoring

Track your Close ⇄ Lemlist sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Close and Lemlist.

How the Close and Lemlist connectors work

Close

Integration surface
REST API
Authentication
API key (sent via HTTP Basic auth)
Change detection
Webhook subscriptions for record events, with polling on date_updated fields for backfills
Capabilities
read · write · webhooks
Rate limits
Subject to per-endpoint rate limits communicated in response headers

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 Close 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.

  1. 01

    Connect your apps

    Authenticate Close 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.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    Close connected
    Lemlist connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Close 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.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Close ⇄ Lemlist
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    Close Lemlist
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Close and Lemlist integration FAQ

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.

Learn more about security
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:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 414 integrations available for Close and Lemlist.

Popular · 8 of 414
All Close integrations All Lemlist integrations Browse all integrations
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