Real-time
Two-way sync
Changes in Resend or SAP S/4HANA instantly reflect in both systems. No stale data, no manual imports.
Business productivity ⇄ ERP
Resend to SAP S/4HANA integration — real-time, two-way sync
Keep Resend and SAP S/4HANA 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 Resend and SAP S/4HANA
Bridge the tools people work in and the system the business runs on: real-time, two-way sync between Resend and SAP S/4HANA.
The ERP holds the records the business is run on, and it is rarely where day-to-day work happens. Resend is closer to the work, and the two often need the same facts about the same people, organizations, and transactions. Bridging them by hand, or by nightly file transfer, leaves each side out of date for hours at a time.
Stacksync syncs Contacts, Audiences, Broadcasts, Domains in Resend with Sales Orders, Purchase Orders, Products / Materials, Billing Documents (Invoices) in SAP S/4HANA bi-directionally and in real time, with field-level mapping and rules for which system wins on conflict. Changes made where the work happens reach the system of record within seconds, and the reverse.
Common use cases
- 01 Feed open and click events into a warehouse for engagement analytics alongside product data.
- 02 Sync CRM contact segments into Resend Audiences so lifecycle broadcasts target current data.
- 03 Keep supplier records aligned between S/4HANA procurement and third-party spend platforms.
- 04 Push closed-won CRM opportunities into S/4HANA as sales orders without manual re-keying.
Common sync patterns
Master data corrections travel
A customer, supplier, or contact detail corrected in either system updates the other, ending duplicate maintenance.
Where Resend faces customers and SAP S/4HANA carries account records
Order, invoice, or account status from SAP S/4HANA appears alongside the customer in Resend, so front-line teams answer from live data.
Where SAP S/4HANA is the HR or people system of record
Worker and organization data from SAP S/4HANA stays current in Resend, so the tools people use daily reflect the org as it actually is.
What you can sync between Resend and SAP S/4HANA
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.
| Resend objects | SAP S/4HANA objects | How this pairing syncs | |
|---|---|---|---|
| Broadcasts One-to-many campaign sends addressed to an audience. | Production Orders Manufacturing order status surfaced in planning and operations tools. | Broadcasts is specific to Resend and Production Orders to SAP S/4HANA — each maps to any object or custom field on the other side. | |
| Domains Verified sending domains with DNS and DKIM status. | Business Partners Unified customer and supplier master records, the anchor entity for CRM-to-ERP account syncs. | Domains is specific to Resend and Business Partners to SAP S/4HANA — each maps to any object or custom field on the other side. | |
| Email events Delivered, bounced, complained, opened, and clicked events emitted via webhooks and written back to source systems. | Sales Orders Order headers and line items synced to CRMs and fulfillment systems as they are created or amended. | Email events is specific to Resend and Sales Orders to SAP S/4HANA — each maps to any object or custom field on the other side. | |
| API keys Scoped credentials managed per environment for send and read access. | Purchase Orders Procurement documents shared with supplier portals and spend-management tools. | API keys is specific to Resend and Purchase Orders to SAP S/4HANA — each maps to any object or custom field on the other side. | |
| Emails Sent messages retrievable by ID with current delivery status. | Products / Materials Material master data distributed to e-commerce, PIM, and CRM catalogs. | Emails is specific to Resend and Products / Materials to SAP S/4HANA — each maps to any object or custom field on the other side. | |
| Contacts Recipient records with email, name, and subscription state, synced from CRMs or databases. | Billing Documents (Invoices) Invoice data pushed to CRMs and payment or collections tools for finance visibility. | Contacts is specific to Resend and Billing Documents (Invoices) to SAP S/4HANA — each maps to any object or custom field on the other side. |
How changes propagate between Resend and SAP S/4HANA
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.
Resend SAP S/4HANA Sub-second propagation
DetectionResend notifies Stacksync of record changes through webhook events. Webhooks for email lifecycle events.
DeliveryEach detected change is written to SAP S/4HANA through its API, with automatic retries and rate-limit backoff.
SAP S/4HANA Resend Interval-based propagation
DetectionStacksync polls SAP S/4HANA for changes on an incremental schedule, reading only records changed since the previous pass. Polling on change timestamps exposed by the OData services.
DeliveryEach detected change is written to Resend through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- SAP S/4HANA: Subject to the platform's API rate limits, which vary by edition and communication arrangement.
What ships with Resend ⇄ SAP S/4HANA
Connect Resend and SAP S/4HANA for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Resend–SAP S/4HANA connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Resend or SAP S/4HANA 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 Resend or SAP S/4HANA record.
Observability
Monitoring
Track your Resend ⇄ SAP S/4HANA sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Resend and SAP S/4HANA.
How the Resend and SAP S/4HANA connectors work
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
SAP S/4HANA
- Integration surface
- OData REST APIs (v2/v4), with SOAP, BAPI/RFC, and IDoc interfaces on on-premise editions
- Authentication
- OAuth 2.0 with communication arrangements on cloud editions; basic auth or certificate-based on-premise
- Change detection
- Polling on change timestamps exposed by the OData services; business events can be emitted through SAP's event infrastructure on cloud editions
- Capabilities
- read · write
- Rate limits
- Subject to the platform's API rate limits, which vary by edition and communication arrangement
How it works
How to connect Resend to SAP S/4HANA — 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 Resend and SAP S/4HANA with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Resend
connected
SAP S/4HANA
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Resend and SAP S/4HANA 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 · Resend ⇄ SAP S/4HANACustomers 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.
Resend SAP S/4HANACompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Resend and SAP S/4HANA integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Resend and SAP S/4HANA: authenticate both systems, choose the objects to sync (such as Resend's Broadcasts and Domains), 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 Resend and SAP S/4HANA 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 Resend and SAP S/4HANA connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Resend–SAP S/4HANA integration in-house.
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Yes — Stacksync ships production-grade connectors for both Resend and SAP S/4HANA. 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 Resend: Webhooks for email lifecycle events; polling for contact and audience state. On SAP S/4HANA: Polling on change timestamps exposed by the OData services; business events can be emitted through SAP's event infrastructure on cloud editions. 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 Resend side: Contacts, Audiences, Broadcasts, Domains, plus custom fields where Resend exposes them. On the SAP S/4HANA side: Sales Orders, Purchase Orders, Products / Materials, Billing Documents (Invoices). 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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