Real-time
Two-way sync
Changes in Gmail or Outreach instantly reflect in both systems. No stale data, no manual imports.
Communications ⇄ CRM
Gmail to Outreach integration — real-time, two-way sync
Keep Gmail and Outreach 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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Migrated from MuleSoft
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Gmail and Outreach
Keep Outreach and Gmail working from the same contacts, and log every call, message, and meeting back on the record, in real time and in both directions.
Outreach holds the people the business talks to: the contacts, their phone numbers and email addresses, and which rep owns the relationship. Gmail is where the talking happens, whether that is calls, texts, email, or meetings. The two depend on the same people, and when the contact list in one drifts from the other, outreach goes to stale numbers and the record of what was said never makes it back to the account.
Stacksync syncs Sequence states, Mailings, Calls, Tasks in Outreach with Messages, Threads, Labels, Drafts in Gmail field by field, in real time, and in both directions. Current contact details flow out to Gmail so it can reach the right person, and the calls, messages, and meetings Gmail produces flow back onto the matching record in Outreach. You decide which system owns which fields, and conflicts resolve by rules you set.
Common use cases
- 01 Suppress prospects across systems when a contact unsubscribes or a customer churns.
- 02 Enroll leads in sequences automatically by writing sequence-state records when a lead crosses a scoring threshold in the warehouse.
- 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
Calls, messages, and meetings on the record
Activity handled in Gmail appears on the matching contact and account in Outreach, so the next person sees the full history without leaving the CRM.
Where Gmail sends at scale: delivery and reply status back on the contact
Sends, bounces, opens, and replies from Gmail update fields on the contact in Outreach, so lead status reflects what actually reached the person.
One contact list, opt-outs included
A number, address, or unsubscribe recorded in either system updates the other, so no one calls a disconnected line or messages someone who opted out.
What you can sync between Gmail and Outreach
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 | Outreach objects | How this pairing syncs | |
|---|---|---|---|
| Threads Conversation groupings that keep replies together; synced so a CRM timeline or support desk shows the full exchange, not isolated messages. | Opportunities Deal records used to tie engagement to pipeline outcomes | Threads is specific to Gmail and Opportunities to Outreach — 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. | Users Seat holders used to resolve ownership on synced records | Labels is specific to Gmail and Users to Outreach — each maps to any object or custom field on the other side. | |
| Drafts Unsent messages; created and updated from templates or sequence tools so reps review before sending from their own mailbox. | Mailboxes Connected sending accounts referenced when attributing outbound activity | Drafts is specific to Gmail and Mailboxes to Outreach — 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. | Prospects The people being engaged; the main record kept in sync with the CRM | Attachments is specific to Gmail and Prospects to Outreach — 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. | Accounts Companies grouping prospects, aligned with CRM account ownership | History is specific to Gmail and Accounts to Outreach — 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. | Sequences Multi-step cadences; synced as reference data for enrollment automation | Messages is specific to Gmail and Sequences to Outreach — each maps to any object or custom field on the other side. |
How changes propagate between Gmail and Outreach
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 Outreach 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 Outreach through its API, with automatic retries and rate-limit backoff.
Outreach Gmail Sub-second propagation
DetectionOutreach notifies Stacksync of record changes through webhook events. Webhook subscriptions on resource create, update, and destroy 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.
- Outreach: Subject to per-user hourly rate limits.
What ships with Gmail ⇄ Outreach
Connect Gmail and Outreach for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Gmail–Outreach connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Gmail or Outreach 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 Outreach record.
Observability
Monitoring
Track your Gmail ⇄ Outreach 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 Outreach.
How the Gmail and Outreach 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.
Outreach
- Integration surface
- REST API conforming to the JSON:API specification
- Authentication
- OAuth 2.0
- Change detection
- webhook subscriptions on resource create, update, and destroy events, plus polling
- Capabilities
- read · write · webhooks
- Rate limits
- subject to per-user hourly rate limits
How it works
How to connect Gmail to Outreach — 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 Outreach 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
Outreach
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Gmail and Outreach 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 ⇄ OutreachCustomers 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 OutreachCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Gmail and Outreach integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Gmail and Outreach: authenticate both systems, choose the objects to sync (such as Gmail's Threads and Labels), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Outreach: Sequence enrollment is modeled as its own resource (sequence states), so adding a prospect to a cadence is a normal record write rather than a special action. Gmail: Push notifications don't carry message content — Pub/Sub delivers a historyId pointer and the changes are fetched via users.history.list. Stacksync's field mapping accounts for these differences between Gmail and Outreach without custom code.
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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 Outreach 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 Outreach connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Gmail–Outreach integration in-house.
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Yes — Stacksync ships production-grade connectors for both Gmail and Outreach. 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 Outreach: Webhook subscriptions on resource create, update, and destroy events, plus polling. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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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