Real-time
Two-way sync
Changes in Attio or Outreach instantly reflect in both systems. No stale data, no manual imports.
CRM
Attio to Outreach integration — real-time, two-way sync
Keep Attio 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 Matillion
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Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Attio and Outreach
Run Attio and Outreach side by side with the same accounts and contacts in both, whether they serve different teams or one is replacing the other.
Two CRMs in one company is more common than anyone plans for: an acquisition brings its own system, regions or business units standardize differently, or a migration is under way and both are live. In every case, some of the same companies and people exist in both systems, and every day of manual double entry pushes the copies further apart.
Stacksync syncs People, Companies, Users, Deals in Attio with Opportunities, Users, Mailboxes, Prospects in Outreach in real time and in both directions, with field-level mapping and matching on identifiers you choose. Update a record in either CRM and the other reflects it within seconds.
Common use cases
- 01 Write product usage and enrichment data into Attio attributes so GTM teams work from live account signals.
- 02 Keep Attio aligned with a billing system or ERP on customer records and plan status.
- 03 Suppress prospects across systems when a contact unsubscribes or a customer churns.
- 04 Enroll leads in sequences automatically by writing sequence-state records when a lead crosses a scoring threshold in the warehouse.
Common sync patterns
Post-acquisition consolidation
Keep both CRMs accurate while the merged team decides on a target system, instead of freezing one and losing months of updates.
Migration with a parallel run
When one CRM is replacing the other, run both fully live until cutover, with no snapshot gap and no data freeze.
Divisional or regional split
Where each CRM serves a different team or region, sync just the shared accounts and contacts so handoffs and cross-sell work.
What you can sync between Attio 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.
| Attio objects | Outreach objects | How this pairing syncs | |
|---|---|---|---|
| Users Synced with incremental and full sync per the Stacksync docs. | Users Seat holders used to resolve ownership on synced records | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Custom objects Workspace-defined objects that behave like standard ones in the API. | Accounts Companies grouping prospects, aligned with CRM account ownership | Custom objects is specific to Attio and Accounts to Outreach — each maps to any object or custom field on the other side. | |
| People Standard person object; synced with marketing tools and warehouse person tables. | Sequences Multi-step cadences; synced as reference data for enrollment automation | People is specific to Attio and Sequences to Outreach — each maps to any object or custom field on the other side. | |
| Companies Standard company object; matched to billing and product accounts in two-way syncs. | Sequence states Per-prospect enrollments; writing one adds a prospect to a cadence | Companies is specific to Attio and Sequence states to Outreach — each maps to any object or custom field on the other side. | |
| Deals Pipeline records; read out for revenue reporting and written to from automation. | Mailings Sent emails with engagement data, pulled for activity analytics | Deals is specific to Attio and Mailings to Outreach — each maps to any object or custom field on the other side. | |
| Workspaces Synced with incremental and full sync per the Stacksync docs. | Calls Logged call records synced into engagement reporting | Workspaces is specific to Attio and Calls to Outreach — each maps to any object or custom field on the other side. |
How changes propagate between Attio 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.
Attio Outreach Sub-second propagation
DetectionAttio notifies Stacksync of record changes through webhook events. Webhooks on record and list-entry events, with polling as a fallback.
DeliveryEach detected change is written to Outreach through its API, with automatic retries and rate-limit backoff.
Outreach Attio 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 Attio through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Attio: Subject to the platform's published API rate limits.
- Outreach: Subject to per-user hourly rate limits.
What ships with Attio ⇄ Outreach
Connect Attio and Outreach for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Attio–Outreach connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Attio 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 Attio or Outreach record.
Observability
Monitoring
Track your Attio ⇄ Outreach sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Attio and Outreach.
How the Attio and Outreach connectors work
Attio
- Integration surface
- REST API
- Authentication
- Guided in-app connection ("Attio CRM" connection created in a few clicks, "without any coding required"); the docs do not name the underlying auth mechanism (OAuth vs API key)
- Change detection
- Webhooks on record and list-entry events, with polling as a fallback
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's published API rate limits.
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 Attio 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 Attio 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.
Attio
connected
Outreach
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Attio 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 · Attio ⇄ 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.
Attio OutreachCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Attio and Outreach integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Attio and Outreach: authenticate both systems, choose the objects to sync (such as Attio's Users and Custom objects), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Attio: REST API. Authentication: Guided in-app connection ("Attio CRM" connection created in a few clicks, "without any coding required"); the docs do not name the underlying auth mechanism (OAuth vs API key). Outreach: REST API conforming to the JSON:API specification. Authentication: OAuth 2.0. Stacksync manages authentication, retries, and rate limits on both sides.
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Attio: Records are distinct from list entries; the same company can appear in multiple lists with list-specific attribute values, which a faithful sync replicates separately. 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. Stacksync's field mapping accounts for these differences between Attio 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 Attio 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 Attio and Outreach connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Attio–Outreach integration in-house.
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Yes — Stacksync ships production-grade connectors for both Attio and Outreach. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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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Attio ⇄ Creatio CRM -
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Outreach ⇄ Vitally -
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Outreach ⇄ Clari
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