Real-time
Two-way sync
Changes in Resend or SendGrid instantly reflect in both systems. No stale data, no manual imports.
Business productivity
Resend to SendGrid integration — real-time, two-way sync
Keep Resend and SendGrid 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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Why teams connect Resend and SendGrid
Stop re-entering the same information in Resend and SendGrid: Stacksync keeps the records they share consistent in real time, in both directions.
Two tools in the daily stack often hold overlapping information: the same people, the same companies, or the same pieces of work, described twice. The tools do different jobs, so consolidating is not the answer; the overlap just needs to stop drifting.
Stacksync syncs Domains, Email events, API keys, Emails in Resend with Email Activity, Contacts, List, Segments in SendGrid in real time. You choose which records overlap, map the fields that should match, and pick a direction or let changes flow both ways. From then on, an update made in either tool is reflected in the other within seconds, without exports or copy-paste.
Because the sync is field-level, each tool keeps its own extras; only the shared data is held in agreement.
Common use cases
- Trigger transactional sends when a row changes in an operational database, such as an order status update.
- Keep suppression and unsubscribe state synced between Resend and other marketing tools to stay compliant.
- Keep product-usage attributes from an operational database updated on SendGrid contacts to drive lifecycle segments
- Reconcile transactional email activity with support tickets so agents see what a customer was sent
Where both tools track people or companies: one consistent record
Contact and company details corrected in either tool update the other, so nobody works from the old version.
Where one tool produces events: mirror them in the other
Payments, replies, messages, or tickets created in one tool can create or update matching records in the other, keeping context in one place.
Where SendGrid is where the team documents or plans: keep its data fed
Information that originates in Resend stays current in SendGrid instead of going stale after a one-time paste.
What you can sync between Resend and SendGrid
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 | SendGrid objects | |
|---|---|---|
| Audiences Named contact lists that broadcasts target; typically mirrored from CRM segments. | Categories Synced with incremental and full sync per the Stacksync docs. | |
| Broadcasts One-to-many campaign sends addressed to an audience. | Senders Synced with incremental and full sync per the Stacksync docs. | |
| Domains Verified sending domains with DNS and DKIM status. | Single Sends One-off marketing campaigns whose stats are read back for reporting. | |
| Email events Delivered, bounced, complained, opened, and clicked events emitted via webhooks and written back to source systems. | Unsubscribe Groups Synced with incremental and full sync per the Stacksync docs. | |
| API keys Scoped credentials managed per environment for send and read access. | Email Activity Synced with incremental and full sync per the Stacksync docs. | |
| Emails Sent messages retrievable by ID with current delivery status. | Contacts Marketing recipients upserted from CRM or database records, including custom field values. |
What ships with Resend ⇄ SendGrid
Connect Resend and SendGrid for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Resend–SendGrid connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Resend or SendGrid 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 SendGrid record.
Observability
Monitoring
Track your Resend ⇄ SendGrid 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 SendGrid.
How the Resend and SendGrid 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
SendGrid
- Integration surface
- REST API (v3)
- Authentication
- API key (create in SendGrid Settings > API Keys with Custom Access / Full Access for the objects to sync; key begins with "SG")
- Change detection
- Event Webhook posts delivery and engagement events (processed, delivered, open, click, bounce, spam report) to an HTTP endpoint; contact and list changes are detected by polling
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits; contact upserts are batched, asynchronous jobs rather than per-row writes
How it works
How to connect Resend to SendGrid — 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 SendGrid 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
SendGrid
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Resend and SendGrid 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 ⇄ SendGridCustomers 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 SendGridCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Resend and SendGrid integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Resend and SendGrid: authenticate both systems, choose the objects to sync (such as Resend's Audiences and Broadcasts), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for Resend and SendGrid: Where both tools track people or companies: one consistent record; Where one tool produces events: mirror them in the other; Where SendGrid is where the team documents or plans: keep its data fed. Contact and company details corrected in either tool update the other, so nobody works from the old version.
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Resend: REST API. Authentication: API key (Bearer token). SendGrid: REST API (v3). Authentication: API key (create in SendGrid Settings > API Keys with Custom Access / Full Access for the objects to sync; key begins with "SG"). 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. SendGrid: Email Activity data retention depends on subscription level (typically 7 days by default, 30 days with the add-on). Stacksync's field mapping accounts for these differences between Resend and SendGrid 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 Resend and SendGrid records are not retained after a sync operation.
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 Resend and SendGrid.
Popular · 8 of 386
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Resend ⇄ Amazon Seller Central -
Resend ⇄ Twilio -
Resend ⇄ GitHub -
Resend ⇄ Atlassian -
SendGrid ⇄ Zendesk -
SendGrid ⇄ Campfire -
SendGrid ⇄ Front - SendGrid ⇄ Amazon Seller Central
No integrations match .
