Skip to content
Business productivity ⇄ ERP

Resend to Unleashed Software integration — real-time, two-way sync

Keep Resend and Unleashed Software 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 Resend and Unleashed Software

Bridge the tools people work in and the system the business runs on: real-time, two-way sync between Resend and Unleashed Software.

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 Bridging them by hand, or by nightly file transfer, leaves each side out of date for hours at a time.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 Domains, Email events, API keys, Emails in Resend with Warehouses, Stock Adjustments, Bills of Materials, Invoices in Unleashed Software 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

  • 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.
  • Mirror Purchase Orders and supplier data to a data warehouse for procurement reporting.
  • Sync Customers bi-directionally with a CRM so credit terms and delivery addresses match everywhere.

Where Resend faces customers and Unleashed Software carries account records

Order, invoice, or account status from Unleashed Software appears alongside the customer in Resend, so front-line teams answer from live data.

Where Unleashed Software is the HR or people system of record

Worker and organization data from Unleashed Software stays current in Resend, so the tools people use daily reflect the org as it actually is.

Master data corrections travel

A customer, supplier, or contact detail corrected in either system updates the other, ending duplicate maintenance.

What you can sync between Resend and Unleashed Software

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 Unleashed Software objects
Emails Sent messages retrievable by ID with current delivery status. Invoices Sales invoices raised from orders, synced into accounting systems.
Contacts Recipient records with email, name, and subscription state, synced from CRMs or databases. Products SKU master records with pricing, units of measure, and inventory settings.
Audiences Named contact lists that broadcasts target; typically mirrored from CRM segments. Stock On Hand Quantity and value per product per warehouse; the read source for availability syncs.
Broadcasts One-to-many campaign sends addressed to an audience. Sales Orders Outbound orders with lines, status, and fulfillment detail; a common write target from storefronts and CRMs.
Domains Verified sending domains with DNS and DKIM status. Purchase Orders Inbound supply orders synced for procurement visibility.
Email events Delivered, bounced, complained, opened, and clicked events emitted via webhooks and written back to source systems. Customers Buyer records with pricing tiers and delivery addresses.
What ships with Resend ⇄ Unleashed Software

Connect Resend and Unleashed Software for flexible, real-time data sync.

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

Real-time

Two-way sync

Changes in Resend or Unleashed Software instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Resend or Unleashed Software 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 Unleashed Software record.

Observability

Monitoring

Track your Resend ⇄ Unleashed Software 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 Unleashed Software.

How the Resend and Unleashed Software 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

Unleashed Software

Integration surface
REST API
Authentication
API ID plus API key, with each request signed using an HMAC-SHA256 of the query string
Change detection
Polling with modified-date filters on list endpoints
Capabilities
read · write
Rate limits
Subject to the platform's API rate limits; paginate list endpoints and batch where possible.
How it works

How to connect Resend to Unleashed Software — 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.

  1. 01

    Connect your apps

    Authenticate Resend and Unleashed Software with each platform's 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
    Resend connected
    Unleashed Software connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Resend and Unleashed Software 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.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Resend ⇄ Unleashed Software
    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
    Resend Unleashed Software
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
Try interactive demo
FAQ

Resend and Unleashed Software integration FAQ

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.

Learn more about security
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:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 386 integrations available for Resend and Unleashed Software.

Popular · 8 of 386
All Resend integrations All Unleashed Software integrations Browse all integrations
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