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CRM ⇄ Business productivity

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

Keep Insightly 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 Insightly and Lemlist

Sync what happens in Lemlist with the customer records in Insightly, 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 Leads, Opportunities, Projects, Tasks in Insightly with bi-directional, real-time sync. Activity and record changes in Lemlist update the matching contact or account in Insightly, and CRM data flows the other way wherever Lemlist can store and use it.

Common use cases

  • 01 Push enriched leads from a warehouse or list-building workflow into Lemlist campaigns automatically
  • 02 Propagate unsubscribes and bounces back to the CRM and other outreach tools for suppression compliance
  • 03 Two-way sync of Insightly contacts and organizations with a marketing automation platform
  • 04 Replicate opportunities into Postgres or a warehouse so RevOps can report on pipeline with SQL

Common sync patterns

Where Lemlist runs outreach

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

Where Lemlist supplies contact or company data

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

Where Lemlist can store CRM context: fields kept current

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

What you can sync between Insightly 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.

Insightly objects Lemlist objects How this pairing syncs
Leads Unqualified prospects sync in from forms and enrichment sources before conversion. 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.
Notes Free-text context attaches to synced records for downstream visibility. Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. Notes is specific to Insightly and Activities to Lemlist — each maps to any object or custom field on the other side.
Products Product catalog entries support line-item syncing on opportunities and quotes. Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. Products is specific to Insightly and Unsubscribes to Lemlist — each maps to any object or custom field on the other side.
Custom Fields Per-object custom fields carry enrichment and billing data written from external systems. Webhooks Hook subscriptions define which activity events are pushed to external endpoints. Custom Fields is specific to Insightly and Webhooks to Lemlist — each maps to any object or custom field on the other side.
Contacts Person records sync with marketing and support tools to keep one contact list. Team Members Sender and seat records map outreach activity to reps in other systems. Contacts is specific to Insightly and Team Members to Lemlist — each maps to any object or custom field on the other side.
Organizations Company records map to accounts in ERPs and other CRMs. Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. Organizations is specific to Insightly and Campaigns to Lemlist — each maps to any object or custom field on the other side.

How changes propagate between Insightly 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.

Insightly Lemlist Interval-based propagation

DetectionStacksync polls Insightly for changes on an incremental schedule, reading only records changed since the previous pass. Polling on record updated-date fields.

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

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

Rate-limit considerations

  • Insightly: Daily API request caps vary by Insightly plan.
  • Lemlist: Subject to the platform's API rate limits.
What ships with Insightly ⇄ Lemlist

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Insightly 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 Insightly or Lemlist record.

Observability

Monitoring

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

Trading partners

EDI

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

How the Insightly and Lemlist connectors work

Insightly

Integration surface
REST API (versioned)
Authentication
API key sent via HTTP Basic authentication
Change detection
Polling on record updated-date fields
Capabilities
read · write
Rate limits
Daily API request caps vary by Insightly plan

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

    Choose tables

    Pick the Insightly 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 · Insightly ⇄ 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
    Insightly Lemlist
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Insightly 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 401 integrations available for Insightly and Lemlist.

Popular · 5 of 401
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