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Business productivity

Connect Lemlist to any app with two-way sync.

Two-way sync Lemlist across all your CRMs, databases, data warehouses, EDI systems, and AI tools, with custom workflows tailored to your data.

  • 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 Matillion
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Migrated from Fivetran
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Object catalog

What Stacksync syncs in Lemlist.

These objects sync between Lemlist and any connected system, with field-level mapping and conflict resolution. Custom fields are picked up from the live schema where Lemlist exposes them.

Campaigns
Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows.
Leads
Per-campaign prospect records sync in from enrichment sources and back out with status.
Activities
Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines.
Unsubscribes
Opt-out records propagate to other outreach tools and the CRM for compliance.
Webhooks
Hook subscriptions define which activity events are pushed to external endpoints.
Team Members
Sender and seat records map outreach activity to reps in other systems.
API surface

How Stacksync connects to Lemlist.

The connector runs on Lemlist's native API. Stacksync manages authentication, rate limits, retries, and schema changes so your team does not maintain integration code.

Connection
REST API
Authentication
API key
Change detection
Webhooks on outreach activity events, plus polling
Rate limits
Subject to the platform's API rate limits

Sync directions

  • Read Supported
  • Write Supported
  • Change data capture Not available
  • Webhooks Supported
What ships with Lemlist

Connect Lemlist for flexible, real-time data sync.

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

Real-time

Two-way sync

Changes in Lemlist instantly reflect across connected systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever 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 Lemlist record.

Observability

Monitoring

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

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions.

Use cases

What teams run on the Lemlist connector.

lemlist is bought by sales development leaders, RevOps, and founders running cold email and multichannel outbound across email, LinkedIn, calls, and messaging, with dedicated deliverability tooling. It sits between the prospect database or CRM and the mailbox layer, which means it accumulates campaign, lead, and engagement activity that RevOps teams need reflected back in the CRM and the warehouse for attribution.

  • Sales development leaders
  • RevOps
  • Growth marketing

  1. Sync replies, opens, and bounces from Lemlist into the CRM so outbound activity shows on lead and contact records

  2. Push enriched leads from a warehouse or list-building workflow into Lemlist campaigns automatically

  3. Propagate unsubscribes and bounces back to the CRM and other outreach tools for suppression compliance

  4. Stop or pause sequences automatically when a reply converts to a deal in the CRM

  5. Mirror campaign performance data into BI tools for outbound reporting across senders

  6. Sync Leads and their campaign Activities (opens, clicks, replies, bounces) into the CRM so reps and attribution reporting see outbound touches without manual exports.

All Lemlist integrations

Pick the system you need to keep in sync with Lemlist. Each page covers the sync setup, field mapping, and common workflows for that pair.

CRM · 32

ERP · 6

Database · 13

Data warehouse · 9

Business productivity · 30

Accounting and finance · 14

How it works

Set up Lemlist in minutes, without APIs.

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 Lemlist with its 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
    Lemlist connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Lemlist objects to sync — Stacksync auto-detects the schema, 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 · 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
    Lemlist database
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
Try interactive demo

FAQ

Lemlist connector FAQ

What can I sync with the Lemlist connector?

Lemlist's core objects — Campaigns, Leads, Activities, Unsubscribes and custom fields — can sync with any of 302 other systems. Every integration is real-time and bidirectional, with field-level mapping and conflict resolution.

How does Stacksync connect to Lemlist?

Via REST API, authenticated with API key. Changes are detected as follows — webhooks on outreach activity events, plus polling. Stacksync manages rate limits, retries, and schema changes automatically.

Is the Lemlist connector two-way?

Yes. Changes made in Lemlist propagate to the connected system and vice versa, in milliseconds. One-way flows are also supported when a direction should stay read-only.

How long does a Lemlist integration take to set up?

Most Lemlist integrations go live in minutes: authenticate Lemlist and the other system, pick objects and fields, and enable the sync. No code and no infrastructure to manage.

Is Lemlist data secure in transit?

Stacksync is SOC 2 Type II, ISO 27001, GDPR and HIPAA compliant. Lemlist data is encrypted in transit, and a zero-persistent-storage architecture means records are not retained after a sync operation.

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
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