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

Keep Lemlist and Notion 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 Lemlist and Notion

Stop re-entering the same information in Lemlist and Notion: 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 Leads, Activities, Unsubscribes, Webhooks in Lemlist with Formula and Rollup properties, Users, Comments, Files and attachments in Notion 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

  • 01 Sync replies, opens, and bounces from Lemlist into the CRM so outbound activity shows on lead and contact records
  • 02 Push enriched leads from a warehouse or list-building workflow into Lemlist campaigns automatically
  • 03 Two-way sync a Notion projects or tasks data source with a Postgres table so engineers work in SQL while the team edits Pages in Notion, mapping status, date, and assignee properties both ways.
  • 04 Push rows from a warehouse or another database into a Notion data source as Pages so ops and leadership read live metrics in a familiar Notion view.

Common sync patterns

Where Notion is where the team documents or plans: keep its data fed

Information that originates in Lemlist stays current in Notion instead of going stale after a one-time paste.

Handoffs between teams

When work started in one tool continues in the other, the shared fields travel with it 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.

What you can sync between Lemlist and Notion

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.

Lemlist objects Notion objects How this pairing syncs
Team Members Sender and seat records map outreach activity to reps in other systems. Users Workspace members and bots referenced by people properties; read-only — users cannot be created or invited through the API. Team Members is specific to Lemlist and Users to Notion — each maps to any object or custom field on the other side.
Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. Comments Page and inline discussion threads; can be read and created, useful for surfacing Notion activity in another system. Campaigns is specific to Lemlist and Comments to Notion — each maps to any object or custom field on the other side.
Leads Per-campaign prospect records sync in from enrichment sources and back out with status. Files and attachments File-property and file-block values. Notion-hosted URLs are temporary and expire, so files are re-fetched or copied at sync time. Leads is specific to Lemlist and Files and attachments to Notion — each maps to any object or custom field on the other side.
Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. Pages The core content unit and also every row of a database; synced two-way as records, with typed properties mapping to table columns. Activities is specific to Lemlist and Pages to Notion — each maps to any object or custom field on the other side.
Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. Databases / Data sources Collections of pages with a typed property schema. Since the 2025-09-03 API a database is a container holding one or more data sources; syncs target a specific data_source_id. Unsubscribes is specific to Lemlist and Databases / Data sources to Notion — each maps to any object or custom field on the other side.
Webhooks Hook subscriptions define which activity events are pushed to external endpoints. Properties Typed columns on a page — title, rich_text, number, select, multi_select, date, people, relation, status, checkbox, URL. Read and written both ways. Webhooks is specific to Lemlist and Properties to Notion — each maps to any object or custom field on the other side.

How changes propagate between Lemlist and Notion

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.

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

Notion Lemlist Sub-second propagation

DetectionNotion notifies Stacksync of record changes through webhook events. Workspace webhooks (page.created, page.content_updated, data_source.schema_updated, comment.created.

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

Rate-limit considerations

  • Lemlist: Subject to the platform's API rate limits.
  • Notion: Average of ~3 requests/second per integration with some bursts; 429 with a Retry-After header when exceeded. Payloads capped at 500 KB and 1000 block elements.
What ships with Lemlist ⇄ Notion

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Lemlist or Notion 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 or Notion record.

Observability

Monitoring

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

Trading partners

EDI

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

How the Lemlist and Notion connectors work

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

Notion

Integration surface
REST API (api.notion.com/v1)
Authentication
OAuth 2.0 for public integrations, or an internal integration secret (bearer token); every request must send a Notion-Version header
Change detection
Workspace webhooks (page.created, page.content_updated, data_source.schema_updated, comment.created; HMAC-SHA256 signed) plus polling on each page's last_edited_time
Capabilities
read · write · webhooks
Rate limits
Average of ~3 requests/second per integration with some bursts; 429 with a Retry-After header when exceeded. Payloads capped at 500 KB and 1000 block elements.
How it works

How to connect Lemlist to Notion — 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 Lemlist and Notion 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
    Lemlist connected
    Notion connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

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

Lemlist and Notion 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
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:

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

Related integrations

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