Real-time
Two-way sync
Changes in ConnectWise or Lemlist instantly reflect in both systems. No stale data, no manual imports.
Business productivity
ConnectWise to Lemlist integration — real-time, two-way sync
Keep ConnectWise 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
Case study
Migrated from Mulesoft
Case study
Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
Case study
Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect ConnectWise and Lemlist
Stop re-entering the same information in ConnectWise and Lemlist: Stacksync keeps the records they share consistent in real time, in both directions.
Two tools in the daily stack often hold overlapping information: the same people, the same companies, or the same pieces of work, described twice. The tools do different jobs, so consolidating is not the answer; the overlap just needs to stop drifting.
Stacksync syncs Contacts, Service Tickets, Opportunities, Agreements in ConnectWise with Unsubscribes, Webhooks, Team Members, Campaigns in Lemlist in real time. You choose which records overlap, map the fields that should match, and pick a direction or let changes flow both ways. From then on, an update made in either tool is reflected in the other within seconds, without exports or copy-paste.
Because the sync is field-level, each tool keeps its own extras; only the shared data is held in agreement.
Common use cases
- Reconcile ConnectWise invoices and agreements against the accounting system to catch billing gaps.
- Keep configuration (asset) records aligned with an external CMDB or RMM tool.
- Sync replies, opens, and bounces from Lemlist into the CRM so outbound activity shows on lead and contact records
- Push enriched leads from a warehouse or list-building workflow into Lemlist campaigns automatically
Where both tools track people or companies: one consistent record
Contact and company details corrected in either tool update the other, so nobody works from the old version.
Where one tool produces events: mirror them in the other
Payments, replies, messages, or tickets created in one tool can create or update matching records in the other, keeping context in one place.
Where Lemlist is where the team documents or plans: keep its data fed
Information that originates in ConnectWise stays current in Lemlist instead of going stale after a one-time paste.
What you can sync between ConnectWise 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.
| ConnectWise objects | Lemlist objects | |
|---|---|---|
| Service Tickets Support and service desk tickets, including status, board, and priority fields. | Leads Per-campaign prospect records sync in from enrichment sources and back out with status. | |
| Opportunities Sales pipeline records synced to CRMs for forecasting and handoff. | Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. | |
| Agreements Recurring contracts and managed-service agreements used for billing reconciliation. | Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. | |
| Projects Project and phase records synced for delivery tracking outside the PSA. | Webhooks Hook subscriptions define which activity events are pushed to external endpoints. | |
| Time Entries Logged technician time, often exported for payroll and invoicing checks. | Team Members Sender and seat records map outreach activity to reps in other systems. | |
| Invoices Billing records reconciled against accounting systems. | Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. |
What ships with ConnectWise ⇄ Lemlist
Connect ConnectWise and Lemlist for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every ConnectWise–Lemlist connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever ConnectWise 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 ConnectWise or Lemlist record.
Observability
Monitoring
Track your ConnectWise ⇄ Lemlist sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between ConnectWise and Lemlist.
How the ConnectWise and Lemlist connectors work
ConnectWise
- Integration surface
- REST API
- Authentication
- Public/private API key pair for an API member, combined with a registered clientId, sent via Basic authentication
- Change detection
- Callbacks (webhooks) on record changes, supplemented by polling on last-updated fields
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits per company and integration
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 ConnectWise 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 ConnectWise 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.
ConnectWise
connected
Lemlist
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the ConnectWise 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 · ConnectWise ⇄ 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.
ConnectWise LemlistCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
ConnectWise and Lemlist integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between ConnectWise and Lemlist: authenticate both systems, choose the objects to sync (such as ConnectWise's Service Tickets and Opportunities), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Yes — Stacksync ships production-grade connectors for both ConnectWise and Lemlist. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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Change detection on ConnectWise: Callbacks (webhooks) on record changes, supplemented by polling on last-updated fields. On Lemlist: Webhooks on outreach activity events, plus polling. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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On the ConnectWise side: Contacts, Service Tickets, Opportunities, Agreements, plus custom fields where ConnectWise exposes them. On the Lemlist side: Unsubscribes, Webhooks, Team Members, Campaigns. Stacksync auto-detects both schemas and converts types between the two systems.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for ConnectWise and Lemlist: Where both tools track people or companies: one consistent record; Where one tool produces events: mirror them in the other; Where Lemlist is where the team documents or plans: keep its data fed. Contact and company details corrected in either tool update the other, so nobody works from the old version.
SECURITY
Security teams love 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
CSA STAR
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
Every pair below is a real-time, two-way sync. Search all 386 integrations available for ConnectWise and Lemlist.
Popular · 8 of 386
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ConnectWise ⇄ GitHub -
ConnectWise ⇄ Atlassian -
ConnectWise ⇄ Braze -
ConnectWise ⇄ Aviato -
Lemlist ⇄ NextGen Healthcare -
Lemlist ⇄ Orderful -
Lemlist ⇄ Resend - Lemlist ⇄ ServiceNow
No integrations match .
