Real-time
Two-way sync
Changes in PostgreSQL or Resend instantly reflect in both systems. No stale data, no manual imports.
Database ⇄ Business productivity
PostgreSQL to Resend integration — real-time, two-way sync
Keep PostgreSQL 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 PostgreSQL and Resend
Mirror Resend's data into PostgreSQL so your own code can read and write it like any other table, with changes flowing both ways in seconds.
Engineers integrate with tools like Resend through APIs, which means auth, pagination, rate limits, webhooks, and retry logic, all maintained forever and all different for every tool. Meanwhile the data would be trivial to use if it simply lived in PostgreSQL.
Stacksync mirrors Broadcasts, Domains, Email events, API keys from Resend into Materialized Views, Schemas, Columns, Primary and Unique Keys in PostgreSQL and keeps both sides in sync in real time. Your services query the database directly, and inserts or updates your code makes flow back into Resend, so the tool and the database never disagree.
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.
- Let an application write to its own database and have those rows appear as records in business systems in near real time
- Consolidate data from several microservice databases into one operational Postgres store
Read Resend with a query
Records from Resend are ordinary rows in PostgreSQL; join them, index them, and use them in application logic without touching the vendor API.
Automate Resend from your codebase
Write to the synced tables in PostgreSQL and Stacksync propagates the change into Resend, replacing custom integration code.
React to changes as they happen
Updates in Resend arrive as row changes in PostgreSQL, so triggers, jobs, and services can respond in near real time.
What you can sync between PostgreSQL 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.
| PostgreSQL objects | Resend objects | |
|---|---|---|
| Primary and Unique Keys Used as match keys for idempotent upserts and conflict resolution. | Broadcasts One-to-many campaign sends addressed to an audience. | |
| JSONB Columns Hold semi-structured payloads such as nested SaaS objects or metadata. | Domains Verified sending domains with DNS and DKIM status. | |
| Sequences Generate surrogate keys for rows created by inbound syncs. | Email events Delivered, bounced, complained, opened, and clicked events emitted via webhooks and written back to source systems. | |
| Custom Types and Enums Constrain synced values to a fixed set, mirroring picklist fields. | API keys Scoped credentials managed per environment for send and read access. | |
| Tables The primary sync target; rows map one-to-one to records in connected SaaS systems. | Emails Sent messages retrievable by ID with current delivery status. | |
| Views Read-side projections used to expose joined or filtered data to a sync. | Contacts Recipient records with email, name, and subscription state, synced from CRMs or databases. |
What ships with PostgreSQL ⇄ Resend
Connect PostgreSQL and Resend for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every PostgreSQL–Resend connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever PostgreSQL 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 PostgreSQL or Resend record.
Observability
Monitoring
Track your PostgreSQL ⇄ Resend sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between PostgreSQL and Resend.
How the PostgreSQL and Resend connectors work
PostgreSQL
- Integration surface
- SQL wire protocol (PostgreSQL frontend/backend protocol)
- Authentication
- Database credentials (connection string or parameters), with optional SSL root certificate upload and optional SSH tunnel (SSH user + host); a least-privilege DB user
- Change detection
- Logical replication (wal_level = logical) for change data capture via the "Postgres" connector; database triggers (TRIGGER grant + stacksync_logging schema) via the trigger-based "Postgres Heroku" connector where
- Capabilities
- read · write · CDC
- Rate limits
- No API rate limits; throughput is bounded by connection limits, instance resources, and replication slot throughput
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 PostgreSQL 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 PostgreSQL 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.
PostgreSQL
connected
Resend
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the PostgreSQL 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 · PostgreSQL ⇄ 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.
PostgreSQL ResendCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
PostgreSQL and Resend integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between PostgreSQL and Resend: authenticate both systems, choose the objects to sync (such as PostgreSQL's Primary and Unique Keys and JSONB Columns), map fields visually, and changes propagate both ways in milliseconds — no code required.
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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. PostgreSQL: Renaming schemas, tables, or columns will break Stacksync configuration (requires manual sync configuration update). Stacksync's field mapping accounts for these differences between PostgreSQL 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 PostgreSQL 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 PostgreSQL and Resend connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom PostgreSQL–Resend integration in-house.
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Yes — Stacksync ships production-grade connectors for both PostgreSQL and Resend. 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 PostgreSQL: Logical replication (wal_level = logical) for change data capture via the "Postgres" connector; database triggers (TRIGGER grant + stacksync_logging schema) via the trigger-based "Postgres Heroku" connector where. On Resend: Webhooks for email lifecycle events; polling for contact and audience state. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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 PostgreSQL and Resend.
Popular · 8 of 386
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PostgreSQL ⇄ Microsoft 365 -
PostgreSQL ⇄ Microsoft Dynamics 365 -
PostgreSQL ⇄ Microsoft Teams -
PostgreSQL ⇄ NextGen Healthcare -
Resend ⇄ Citus -
Resend ⇄ Couchbase -
Resend ⇄ DuckDB -
Resend ⇄ Elasticsearch
No integrations match .
