Real-time
Two-way sync
Changes in Outreach or Resend instantly reflect in both systems. No stale data, no manual imports.
CRM ⇄ Business productivity
Outreach to Resend integration — real-time, two-way sync
Keep Outreach and Resend 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
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
Why teams connect Outreach and Resend
Sync what happens in Resend with the customer records in Outreach, 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 Resend 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 Contacts, Audiences, Broadcasts, Domains in Resend to Opportunities, Users, Mailboxes, Prospects in Outreach with bi-directional, real-time sync. Activity and record changes in Resend update the matching contact or account in Outreach, and CRM data flows the other way wherever Resend can store and use it.
Common use cases
- Write delivery, bounce, and complaint events back to the CRM or a Postgres table for deliverability reporting.
- Trigger transactional sends when a row changes in an operational database, such as an order status update.
- Suppress prospects across systems when a contact unsubscribes or a customer churns.
- Enroll leads in sequences automatically by writing sequence-state records when a lead crosses a scoring threshold in the warehouse.
Where Resend handles support or shared inboxes
Tickets and conversations attach to the right contact and account in Outreach, so sales sees open issues before the next call.
Where Resend runs outreach
Prospects, sends, and replies sync into Outreach, keeping lead status current without manual imports.
Where Resend supplies contact or company data
Enriched fields land directly on records in Outreach, and refreshes keep them from going stale.
What you can sync between Outreach and Resend
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.
| Outreach objects | Resend objects | |
|---|---|---|
| Mailings Sent emails with engagement data, pulled for activity analytics | Contacts Recipient records with email, name, and subscription state, synced from CRMs or databases. | |
| Calls Logged call records synced into engagement reporting | Audiences Named contact lists that broadcasts target; typically mirrored from CRM segments. | |
| Tasks Rep action items mirrored between Outreach and the CRM | Broadcasts One-to-many campaign sends addressed to an audience. | |
| Opportunities Deal records used to tie engagement to pipeline outcomes | Domains Verified sending domains with DNS and DKIM status. | |
| Users Seat holders used to resolve ownership on synced records | Email events Delivered, bounced, complained, opened, and clicked events emitted via webhooks and written back to source systems. | |
| Mailboxes Connected sending accounts referenced when attributing outbound activity | API keys Scoped credentials managed per environment for send and read access. |
What ships with Outreach ⇄ Resend
Connect Outreach and Resend for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Outreach–Resend connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Outreach or Resend 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 Outreach or Resend record.
Observability
Monitoring
Track your Outreach ⇄ Resend sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Outreach and Resend.
How the Outreach and Resend connectors work
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
Resend
- Integration surface
- REST API
- Authentication
- API key (Bearer token)
- Change detection
- Webhooks for email lifecycle events; polling for contact and audience state
- Capabilities
- read · write · webhooks
How it works
How to connect Outreach to Resend — 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 Outreach and Resend with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Outreach
connected
Resend
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Outreach and Resend 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 · Outreach ⇄ ResendCustomers 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.
Outreach ResendCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Outreach and Resend integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Outreach and Resend: authenticate both systems, choose the objects to sync (such as Outreach's Mailings and Calls), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Common patterns for Outreach and Resend: Where Resend handles support or shared inboxes; Where Resend runs outreach; Where Resend supplies contact or company data. Tickets and conversations attach to the right contact and account in Outreach, so sales sees open issues before the next call.
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Outreach: REST API conforming to the JSON:API specification. Authentication: OAuth 2.0. Resend: REST API. Authentication: API key (Bearer token). Stacksync manages authentication, retries, and rate limits on both sides.
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Resend: Built by the team behind React Email, so templates are commonly authored as React components rendered to HTML at send time. 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 Outreach and Resend 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 Outreach and Resend 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 Outreach and Resend connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Outreach–Resend integration in-house.
SECURITY
Security teams love 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
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:
Related integrations
Every pair below is a real-time, two-way sync. Search all 386 integrations available for Outreach and Resend.
Popular · 8 of 386
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Outreach ⇄ Lusha -
Outreach ⇄ Microsoft 365 -
Outreach ⇄ Microsoft Dynamics 365 -
Outreach ⇄ Microsoft Teams -
Resend ⇄ Gorgias -
Resend ⇄ Infor CRM -
Resend ⇄ Insightly -
Resend ⇄ Intercom
No integrations match .
