Skip to content
Communications

Connect Gmail to any app with two-way sync.

Two-way sync Gmail across all your CRMs, databases, data warehouses, EDI systems, and AI tools, with custom workflows tailored to your data.

  • 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
Object catalog

What Stacksync syncs in Gmail.

These objects sync between Gmail and any connected system, with field-level mapping and conflict resolution. Custom fields are picked up from the live schema where Gmail exposes them.

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.
Threads
Conversation groupings that keep replies together; synced so a CRM timeline or support desk shows the full exchange, not isolated messages.
Labels
User and system labels (INBOX, SENT, custom); applied and removed via sync to mirror pipeline stages or triage states from an external system.
Drafts
Unsent messages; created and updated from templates or sequence tools so reps review before sending from their own mailbox.
Attachments
File payloads referenced by message part; read out to storage or a document system for archival and compliance workflows.
History
The incremental change log keyed by historyId; used for efficient delta sync so only mailbox changes since the last cursor are fetched.
API surface

How Stacksync connects to Gmail.

The connector runs on Gmail's native API. Stacksync manages authentication, rate limits, retries, and schema changes so your team does not maintain integration code.

Connection
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)
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.

Sync directions

  • Read Supported
  • Write Supported
  • Change data capture Not available
  • Webhooks Supported
What ships with Gmail

Connect Gmail for flexible, real-time data sync.

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

Real-time

Two-way sync

Changes in Gmail instantly reflect across connected systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Gmail 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 record.

Observability

Monitoring

Track your Gmail sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions.

Use cases

What teams run on the Gmail connector.

Gmail is the email surface of Google Workspace and the default system of engagement for most sales, support, and operations teams. Owned by IT and Workspace admins with RevOps as the heaviest downstream consumer, it holds Messages, Threads, Labels, Drafts, and Attachments — the conversation history that CRMs, support desks, and warehouses need reflected on customer records.

  • RevOps / Sales operations
  • Sales and account teams
  • Support operations
  • Data engineering
  • Compliance and legal teams

  1. Log sent and received Messages onto CRM contact and deal timelines automatically so reps never copy-paste email history.

  2. Create Drafts in a rep's mailbox from CRM templates and sequences, keeping sends authentic to the sender's address and signature.

  3. Read Attachments and message metadata into a warehouse or document store for retention, discovery, and compliance reporting.

  4. Mirror Labels with pipeline or ticket states so triage done in an external tool is reflected inside the inbox.

  5. Log every sent and received message onto the matching CRM contact and deal timeline automatically, so pipeline reviews show real conversation history without manual BCC.

  6. Create drafts in a rep's own mailbox from CRM templates and sequences, keeping outreach authentic to the sender while the system tracks state.

All Gmail integrations

Pick the system you need to keep in sync with Gmail. Each page covers the sync setup, field mapping, and common workflows for that pair.

CRM · 40

Database · 7

Data warehouse · 19

Business productivity · 25

How it works

Set up Gmail in minutes, without APIs.

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 Gmail with its 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
    Gmail connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Gmail objects to sync — Stacksync auto-detects the schema, 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 · Gmail
    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
    Gmail database
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
Try interactive demo

FAQ

Gmail connector FAQ

What can I sync with the Gmail connector?

Gmail's core objects — Messages, Threads, Labels, Drafts and custom fields — can sync with any of 302 other systems. Every integration is real-time and bidirectional, with field-level mapping and conflict resolution.

How does Stacksync connect to Gmail?

Via Gmail API (REST, v1), authenticated with 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. Changes are detected as follows — 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). Stacksync manages rate limits, retries, and schema changes automatically.

Is the Gmail connector two-way?

Yes. Changes made in Gmail propagate to the connected system and vice versa, in milliseconds. One-way flows are also supported when a direction should stay read-only.

How long does a Gmail integration take to set up?

Most Gmail integrations go live in minutes: authenticate Gmail and the other system, pick objects and fields, and enable the sync. No code and no infrastructure to manage.

Is Gmail data secure in transit?

Stacksync is SOC 2 Type II, ISO 27001, GDPR and HIPAA compliant. Gmail data is encrypted in transit, and a zero-persistent-storage architecture means records are not retained after a sync operation.

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
Coworkers laughing in front of a laptop in a casual office setting

Your last integration took months.
Your next one takes a prompt.

Book a demo Tour the platform on your own