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Business productivity ⇄ CRM

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

Keep Lemlist and Seismic 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 Seismic

Sync what happens in Lemlist with the customer records in Seismic, 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 Reporting Activities, Library Content, Content Versions, Users in Seismic with bi-directional, real-time sync. Activity and record changes in Lemlist update the matching contact or account in Seismic, 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 Sync Library Content metadata and Custom Property Schemas with a DAM or PIM so one taxonomy governs assets across systems.
  • 04 React to ContentManager and DSR webhook events to update a database when documents are published, versioned, or expired.

Common sync patterns

Where Lemlist supplies contact or company data

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

Where Lemlist can store CRM context: fields kept current

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

Where Lemlist runs outreach

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

What you can sync between Lemlist and Seismic

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 Seismic objects How this pairing syncs
Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. Users User records managed through SCIM 2.0 and legacy user endpoints; created, updated, and deactivated for provisioning sync. Unsubscribes is specific to Lemlist and Users to Seismic — each maps to any object or custom field on the other side.
Webhooks Hook subscriptions define which activity events are pushed to external endpoints. User Groups Group definitions and membership that govern content access; synced from an IdP or HRIS to keep permissions current. Webhooks is specific to Lemlist and User Groups to Seismic — each maps to any object or custom field on the other side.
Team Members Sender and seat records map outreach activity to reps in other systems. Teamsites Tenant-scoped workspace partitions organizing Library content, permissions, and config; scoped by teamSiteId on most content calls. Team Members is specific to Lemlist and Teamsites to Seismic — 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. LiveSend Links Trackable content-share links created via the engagement API; their open and view engagement is read back through Reporting. Campaigns is specific to Lemlist and LiveSend Links to Seismic — 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. Digital Sales Rooms Buyer-facing microsites (DSRs); lifecycle and content-change events surface via webhooks, currently marked Early Access. Leads is specific to Lemlist and Digital Sales Rooms to Seismic — 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. Reporting Activities Content-interaction, engagement, and usage analytics extracted read-only through the ETL-oriented Reporting API v2 for a warehouse. Activities is specific to Lemlist and Reporting Activities to Seismic — each maps to any object or custom field on the other side.

How changes propagate between Lemlist and Seismic

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

Seismic Lemlist Sub-second propagation

DetectionSeismic notifies Stacksync of record changes through webhook events. Webhooks for content, version, user, group, workflow, DSR, and LiveSend events.

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.
  • Seismic: Tiered per-endpoint limits over a rolling 60-second window; exceeding returns HTTP 429, with X-Seismic-Remaining-Calls and X-Seismic-Total-Calls headers.
What ships with Lemlist ⇄ Seismic

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Lemlist or Seismic 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 Seismic record.

Observability

Monitoring

Track your Lemlist ⇄ Seismic 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 Seismic.

How the Lemlist and Seismic 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

Seismic

Integration surface
REST Integration APIs and Reporting API v2
Authentication
OAuth 2.0 / OpenID Connect; Bearer token in the Authorization header, via Authorization Code (user context) or client-credentials app-only flows
Change detection
Webhooks for content, version, user, group, workflow, DSR, and LiveSend events; the Reporting API v2 is polled for batch historical extracts (ETL-oriented, not high-frequency)
Capabilities
read · write · webhooks
Rate limits
Tiered per-endpoint limits over a rolling 60-second window; exceeding returns HTTP 429, with X-Seismic-Remaining-Calls and X-Seismic-Total-Calls headers
Seismic setup guide
How it works

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

    Choose tables

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

Lemlist and Seismic 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

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

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