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Two-way inventory sync with zero oversell
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Real-time inventory sync
across every channel

Hold one stock number across your WMS, Shopify, and Amazon Seller Central, two-way, updated the moment a unit moves, with conflict rules that decide who wins before you oversell.

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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
Where inventory sync goes wrong

Three reasons your stock counts never agree.

Selling the same unit on five channels means five truths about how many you have. Here's where they diverge.

01 - Polling lag

You oversell in the gap

Channel connectors poll every 15–60 minutes. In that window a unit sells on Amazon and Shopify both, and now you're cancelling an order and eating a chargeback.

LATENCY
02 - Last-write-wins

Two channels, two counts, no referee

When the WMS and Shopify disagree on quantity, naive syncs overwrite with whichever wrote last, including a stale count, and silently corrupt your on-hand.

CONFLICT POLICY
03 - Multi-location

One SKU, five warehouses, no rollup

Marketplaces want a single availability number; your WMS tracks per-location. Most tools can't aggregate locations or honor safety stock, so the number they publish is wrong.

SCHEMA
PLATFORM

Six products. One Platform.
Replace many legacy vendors.

Every tool Stacksync replaces is one fewer vendor, one fewer bill, one fewer integration to maintain.

Start building now

Two-way sync

Changes made in one platform automatically update across all connected systems in real time, eliminating data silos and reducing errors.

Replaces:
Heroku Connect and Salesforce Data 360
Heroku Connect Salesforce Data 360

Workflow automation

Stop building brittle API scripts. With Stacksync, you can trigger complex automated workflows using simple SQL commands.

Replaces:
Workato and Boomi

AI Agents

Expose every enterprise system to your agents through a single MCP layer. Claude, ChatGPT and Gemini get production-grade tools without custom glue code.

Natively available in:
Claude and ChatGPT and Gemini
Claude ChatGPT Gemini

Event queues

Handle massive traffic spikes without losing a single event. Queues buffer your data during surges, ensuring strict ordering and reliable delivery.

Replaces:
Kafka and Amazon SQS and Confluent
Kafka Amazon SQS

Database hosting

Interact with your CRM, ERP, and payment tools as if they were just another table in your database. Say goodbye to rate limits and complex API documentation.

Replaces:
AWS RDS and Self-hosted databases
AWS RDS Self-hosted databases

EDI

Transform legacy EDI complexity into simple database interactions. Stacksync automatically parses incoming EDI documents directly into your database tables.

Replaces:
SPS Commerce and TrueCommerce
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Connectors

Every channel and warehouse, one number.

Pre-built two-way connectors for the storefronts, marketplaces, WMS, and ERP that touch inventory, with per-location rollup and safety-stock rules.

Storefronts & marketplaces
05
  • Shopify
  • Amazon Seller Central
  • TikTok Shop
  • Walmart
  • eBay
WMS & inventory
05
  • Cin7
  • DEAR
  • ShipBob
  • Fishbowl
  • Extensiv
ERP & accounting
05
  • NetSuite
  • QuickBooks
  • SAP
  • Microsoft Dynamics
  • Sage Intacct
Data & ops
05
  • Snowflake
  • BigQuery
  • Postgres
  • Google Sheets
  • Slack
Per-location stock, safety-stock buffers, and bundle/kit SKUs are first-class, no scripting required.
Browse all 1,500+ connectors
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

How do you prevent overselling between channels?

Stacksync writes stock changes to every channel in real time and resolves conflicts per field. When a unit sells, every other channel decrements within seconds, well inside the window where double-sells happen.

Can you roll up multiple warehouse locations?

Yes. Publish a single availability number per SKU rolled up across locations, with per-location safety stock honored before the number is sent to each channel.

Which count wins when two systems disagree?

You set the policy per field: source-of-truth wins (e.g., the WMS owns on-hand), last-write-wins, or human-in-the-loop. Most teams make the WMS authoritative and let channels read.

Do you support bundles and kits?

Yes. Kit and bundle SKUs decrement their components, and component changes recompute bundle availability, so kits never oversell their scarcest part.

Coworkers laughing in front of a laptop in a casual office setting

Stop overselling across channels.
One stock number, in real time.

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