Real-time
Two-way sync
Changes in Gmail or Lemlist instantly reflect in both systems. No stale data, no manual imports.
Communications ⇄ Business productivity
Gmail to Lemlist integration — real-time, two-way sync
Keep Gmail 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 Gmail and Lemlist
Sync the people, users, and work records in Lemlist with the calls, messages, and events in Gmail, in real time and in both directions.
Lemlist holds the records a team works from: the contacts, the tickets or tasks, the users, and the history attached to each. Gmail moves the actual communication, whether that is a call, a text, an email, or a meeting, and every one of those is tied to a person and often to a user on your side. When the two are connected only by manual entry or a nightly export, the communication happens in one system while the record it belongs to sits in another, so people rebuild context by hand and reach out from contact lists that are already out of date.
Stacksync syncs Webhooks, Team Members, Campaigns, Leads in Lemlist with Labels, Drafts, Attachments, History in Gmail bi-directionally and in real time. Contacts and users maintained in Lemlist feed Gmail so outbound dialing, messaging, and invites reach current numbers and addresses, and the calls, messages, and meeting events Gmail produces attach to the matching record in Lemlist within seconds. Everything is mapped field by field, with conflict resolution in place of copy-paste, and there is no middleware to build, no rate limits to babysit, and no batch job that leaves the morning running on yesterday's data.
Because the sync is field-level, each system keeps its own extras; only the shared people, users, and activity are held in agreement.
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 Create Drafts in a rep's mailbox from CRM templates and sequences, keeping sends authentic to the sender's address and signature.
- 04 Read Attachments and message metadata into a warehouse or document store for retention, discovery, and compliance reporting.
Common sync patterns
Contacts and numbers kept current for outreach
People and their phone numbers or email addresses maintained in Lemlist sync into Gmail, so outbound dialing, messaging, and invites always reach current details rather than a stale list.
One user and agent roster
Users kept in Lemlist map to accounts, seats, or extensions in Gmail, so the same people exist on both sides and ownership stays meaningful across the two systems.
Turn a communication into follow-up work
A completed call, an inbound message, or a delivery result in Gmail can create or update a ticket, task, or record in Lemlist, so nothing that happens on a call or in a thread gets dropped.
What you can sync between Gmail 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.
| Gmail objects | Lemlist objects | How this pairing syncs | |
|---|---|---|---|
| Drafts Unsent messages; created and updated from templates or sequence tools so reps review before sending from their own mailbox. | Leads Per-campaign prospect records sync in from enrichment sources and back out with status. | Drafts is specific to Gmail and Leads to Lemlist — each maps to any object or custom field on the other side. | |
| Attachments File payloads referenced by message part; read out to storage or a document system for archival and compliance workflows. | Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. | Attachments is specific to Gmail and Activities to Lemlist — each maps to any object or custom field on the other side. | |
| History The incremental change log keyed by historyId; used for efficient delta sync so only mailbox changes since the last cursor are fetched. | Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. | History is specific to Gmail and Unsubscribes to Lemlist — each maps to any object or custom field on the other side. | |
| Messages Individual emails with headers, body, and label state; read out to a CRM or warehouse for activity logging, and sent or modified two-way from sales tools. | Webhooks Hook subscriptions define which activity events are pushed to external endpoints. | Messages is specific to Gmail and Webhooks to Lemlist — each maps to any object or custom field on the other side. | |
| Threads Conversation groupings that keep replies together; synced so a CRM timeline or support desk shows the full exchange, not isolated messages. | Team Members Sender and seat records map outreach activity to reps in other systems. | Threads is specific to Gmail and Team Members to Lemlist — each maps to any object or custom field on the other side. | |
| Labels User and system labels (INBOX, SENT, custom); applied and removed via sync to mirror pipeline stages or triage states from an external system. | Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. | Labels is specific to Gmail and Campaigns to Lemlist — each maps to any object or custom field on the other side. |
How changes propagate between Gmail 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.
Gmail Lemlist Sub-second propagation
DetectionGmail notifies Stacksync of record changes through webhook events. Incremental sync via users.history.list from a stored historyId cursor, plus real-time push notifications through Google Cloud Pub/Sub watch on the.
DeliveryEach detected change is written to Lemlist through its API, with automatic retries and rate-limit backoff.
Lemlist Gmail 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 Gmail through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Gmail: Quota is measured in units per user per second (e.g. messages.list = 5 units, messages.send = 100 units) against a 250 quota-unit/user/second limit and a daily project cap; exceeding limits returns 429 with exponential backoff expected.
- Lemlist: Subject to the platform's API rate limits.
What ships with Gmail ⇄ Lemlist
Connect Gmail and Lemlist for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Gmail–Lemlist connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Gmail 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 Gmail or Lemlist record.
Observability
Monitoring
Track your Gmail ⇄ Lemlist sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Gmail and Lemlist.
How the Gmail and Lemlist connectors work
Gmail
- Integration surface
- Gmail API (REST, v1)
- Authentication
- OAuth 2.0 via Google — user-authorized consent with granular scopes (gmail.readonly, gmail.modify, gmail.send, gmail.labels); restricted scopes require Google's app verification for production use
- Change detection
- Incremental sync via users.history.list from a stored historyId cursor, plus real-time push notifications through Google Cloud Pub/Sub watch on the mailbox (watch must be renewed at least every 7 days)
- Capabilities
- read · write · webhooks
- Rate limits
- Quota is measured in units per user per second (e.g. messages.list = 5 units, messages.send = 100 units) against a 250 quota-unit/user/second limit and a daily project cap; exceeding limits returns 429 with exponential backoff expected.
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 Gmail 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 Gmail 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.
Gmail
connected
Lemlist
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Gmail 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 · Gmail ⇄ 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.
Gmail LemlistCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Gmail and Lemlist integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Gmail and Lemlist: authenticate both systems, choose the objects to sync (such as Gmail's Drafts and Attachments), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Gmail and Lemlist records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Gmail and Lemlist connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Gmail–Lemlist integration in-house.
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Yes — Stacksync ships production-grade connectors for both Gmail 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 Gmail: Incremental sync via users.history.list from a stored historyId cursor, plus real-time push notifications through Google Cloud Pub/Sub watch on the mailbox (watch must be renewed at least every 7 days). 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 Lemlist side: Webhooks, Team Members, Campaigns, Leads, plus custom fields where Lemlist exposes them. On the Gmail side: Labels, Drafts, Attachments, History. Stacksync auto-detects both schemas and converts types between the two systems.
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.
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:
Related integrations
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