Skip to content
Event-driven workflows for cross-system processes

Event queues that move millions of events without dropping one.

Stacksync's event queues decouple producers from consumers and process every event in order — with automatic retries, exactly-once delivery, and full observability.

Book a demo Start now

We'll build your first integration on the call. SOC 2 · ISO 27001 · HIPAA.

Built for teams moving millions of events 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
STACKSYNC EVENT QUEUES

Everything reliable event queues need.

Ordering, retries, back-pressure and prioritization are the things that break event-driven systems in production. Stacksync's event queues handle each of them by default, so your workflows keep flowing.

EVENT ORDERING

Every event processed
in the exact order it happened.

Events are handled in the precise sequence they occur, preserving data integrity and business logic — no out-of-order writes, no double-processing.

See how ordering works
  1. 01 Strict in-order processing keeps downstream state correct
  2. 02 Exactly-once delivery — no duplicates, no dropped events
  3. 03 Race conditions and resource contention removed by design
Queued records Managed event queue
Queued records
Head of queue Tail of queue
Refresh Flush 1 Record − +
Created Time JSON Data
14:02:08.214 { "event":"upsert", "table":"Account", "id":"0014x…" }
14:02:08.351 { "event":"update", "table":"Contact", "id":"0034a…" }
14:02:09.007 { "event":"delete", "table":"Lead", "id":"00Q9c…" }
14:02:09.488 { "event":"upsert", "table":"Order", "id":"8011x…" }
14:02:10.122 { "event":"update", "table":"Account", "id":"0014y…" }
Inspect, replay, or flush every event in order FIFO · managed
RELIABILITY

No event is ever lost,
even through failures.

Failed events are retried automatically or parked with full context, so an outage or a bad payload never drops data. Inspect, fix, and replay when the issue clears.

Explore reliability
  1. 01 Automatic retries with backoff on transient errors
  2. 02 Dead-letter parking keeps the payload and error for every failure
  3. 03 Immutable event log for audit and compliance
Rules Queue YAML Settings
Flushing rules
Flush frequency

Flush a batch when it has 500 records or the oldest record is over 5 seconds old.

Flush at most 20 times every 60 seconds.

Events Consumption Order
FIFO
Save changes Cancel
DECOUPLED ARCHITECTURE

Producers and consumers,
fully independent.

Apps, APIs, and databases publish events without waiting on who consumes them — your automations, notifications, and syncs scale on their own schedule.

See the architecture
  1. 01 Producers never block on slow or busy consumers
  2. 02 Add or change consumers without touching producers
  3. 03 Scale each side independently as volume grows
Search 🇺🇸 US East (N. Virginia)
Name Apps Type Status Created Time Last Modified Time
salesforce-events Queue 2026-03-10 15:26 (UTC+01) 2026-03-10 15:29 (UTC+01)
orders-stream Queue 2026-03-08 09:14 (UTC+01) 2026-03-10 11:02 (UTC+01)
billing-events Queue 2026-02-27 16:48 (UTC+01) 2026-03-09 08:31 (UTC+01)
inventory-changes Queue 2026-02-19 13:05 (UTC+01) 2026-03-07 22:10 (UTC+01)
contact-updates Queue 2026-02-11 10:42 (UTC+01) 2026-03-06 17:55 (UTC+01)
warehouse-cdc Queue 2026-02-03 08:20 (UTC+01) 2026-03-05 14:08 (UTC+01)
Producers publish to managed queues — consumers drain them on their own schedule US East · 6 active
CONNECTORS

5,000 connectors.
And AI builds for the rest.

We support every major SaaS and database out of the box. If yours isn't listed, paste an API URL and our agent will spec, build and ship a connector, typically in under a minute.

Salesforce HubSpot NetSuite Zendesk Microsoft Dynamics 365 Dynamics 365 F&O Attio Pipedrive Zoho CRM Campfire Rillet Front Shopify Amazon Seller Central SendGrid PostgreSQL Amazon RDS Snowflake Supabase MySQL SuiteAnalytics MariaDB SQL Server BigQuery MotherDuck Postgres Heroku Airtable AWS Aurora MySQL AWS Aurora PostgreSQL Twilio
Browse the full catalog →
Connector agent
Don't see your app? Paste a URL.
Fetched OpenAPI spec
47 endpoints discovered
OK
Inferred auth, OAuth 2.0
Authorization code flow
OK
Generated 12 trigger templates
customer.created · order.paid · …
OK
Validating against sandbox
running 24 test calls
…
Generate connector
CUSTOMER STORIES

Global enterprises and top startups choose Stacksync.

E-Commerce · DTC · Provo, UT

Black Friday at scale, without losing a single order.

Just Ingredients runs a high-volume DTC business on a stack that has to absorb traffic spikes without missing a beat. Stacksync moves orders, customers and inventory between Shopify, NetSuite and the warehouse in real time, even on the heaviest days of the year.

Black Friday
survived without incident
Real-time order + inventory sync
0
orders lost
Lossless triggers, replayable end-to-end
Scale your e-commerce for Black Friday
Renewable Energy · Enterprise · Summit, NJ

Energy delivered to 16,000+ households, with better observability.

Nautilus Solar manages community solar portfolios serving tens of thousands of households. Stacksync keeps their CRM, billing and operational systems in lockstep, every kilowatt-hour traceable, every customer event observable.

16,000+
households served
Live customer + billing sync
Real-time
observability across systems
No more end-of-month reconciliation
Sync your CRM, billing and operations in real time
Health Tech · Series C · Oakland, CA

Engineers back on the core product.

Eko's engineering team was spending sprints on brittle integration plumbing. Stacksync took over the syncs and workflows between their CRM, data warehouse and clinical app stack, freeing significant engineering capacity for product innovation.

100%
integration ops handed off
CRM, warehouse and product app stack
Weeks
reclaimed per quarter
Redirected to clinical product roadmap
Free your engineers from integration work
Automotive Logistics · Enterprise · St. Louis, MO

From Heroku Connect to a real-time competitive edge.

ACERTUS replaced Heroku Connect with Stacksync's real-time, bidirectional sync between Salesforce and Postgres. Data integration stopped consuming their best engineers and became infrastructure they could build on, reliably, at scale.

Heroku
Connect → Stacksync
Migrated without downtime or data loss
24/7
real-time bi-di sync
Salesforce ⇄ Postgres, conflict-resolved
Replace Heroku Connect with real-time bi-di sync
Coffee Hardware · DTC · San Francisco, CA

A connected stack from the showroom to the warehouse.

Fellow ties together its e-commerce, retail and back-office systems with Stacksync. Inventory, orders and customer data move in real time between Shopify, NetSuite and their support tools, so every team works from the same picture.

One
source of truth across systems
Shopify ⇄ NetSuite ⇄ support stack
Days
to roll out new flows
No-code config, version-controlled
Unify your retail and back-office stack
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
→ 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
LEGACY IPAAS MIGRATION FUND

Stuck in a contract? We'll buy your way out.

Stacksync buys back your current contract with Boomi, Celigo, Workato, or MuleSoft. No strings. No catch.

Check your eligibility for the migration fund
Migrate from Boomi
Migrate from Celigo
Migrate from Workato
Migrate from MuleSoft
Migrate from Heroku Connect
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