Integration Platform as a Service (iPaaS) is a cloud service for building, running and monitoring the integrations that connect an organization’s applications and data. Instead of writing and hosting custom code for each connection, teams use the platform’s connectors, mapping tools and workflow designer to move data and trigger actions between systems, such as CRM, ERP, HR, finance and SaaS apps. The provider runs the platform; you design and own the integrations.
At a glance
- iPaaS connects cloud and, often, on-premises applications through prebuilt connectors, data mapping and workflow logic.
- The provider hosts, scales and updates the platform; your team or a partner builds and maintains the integrations on it.
- Integrations can run on a schedule, in response to events such as webhooks, or on demand through an API.
- Central monitoring, error handling and retries replace scattered scripts that fail silently.
- Pricing is often usage-based, so volume and connector tiers drive cost.
What problem it solves
As organizations add SaaS apps, the same customer, employee or order data ends up in several systems that do not talk to each other. Staff re-key information, records drift out of sync, and reports disagree. The usual early fix is point-to-point integration: a custom script or a native connector between each pair of apps. That works for a few systems, but as the number grows it becomes a fragile web that nobody fully understands, and a change in one vendor’s API can break processes elsewhere.
An iPaaS gives these connections one home. Integrations are built with common tools, run on managed infrastructure, logged in one place and changed without hunting through servers for old scripts.
How it works
Connectors. The platform offers prebuilt connectors for common applications, databases, file transfer and messaging. A connector handles authentication and the application’s API so builders work with records and fields instead of raw requests. Custom connectors can usually be built for systems without one.
Mapping and transformation. Data rarely has the same shape in two systems. Builders map fields, convert formats, look up values and apply rules, usually in a visual designer, with scripting for complex cases.
Orchestration. Integration flows define what happens and in what order: when a record changes in system A, check a condition, update system B, then notify system C. Flows can run on a schedule, react to events or be exposed as an API that other systems call.
Run and monitor. The provider runs the flows on its infrastructure. Dashboards show successes and failures, failed messages can be retried, and alerts flag errors. For on-premises systems, many platforms use an agent installed inside your network, which matters in hybrid IT estates.
Some iPaaS products also handle bulk data movement into analytics systems, overlapping with ETL tools, and some include API management features or low-code app building.
When it matters for buyers
- When the number of apps grows. SaaS sprawl multiplies the connections you need to maintain.
- When integrations keep breaking. Central monitoring and retries reduce silent failures and data drift.
- During ERP or CRM projects. Replacing a core system means rebuilding its integrations; doing so on a platform avoids repeating the point-to-point approach. See our ERP solutions for help sourcing the systems at the center of most integration work.
- After a merger. Two sets of systems need to share data long before they can be consolidated.
Questions to ask vendors
- Which connectors are included in our tier, and which cost extra?
- How is usage measured and priced, and what happens if we exceed our plan?
- How does the platform reach on-premises systems, and how is that agent secured and updated?
- Where is data processed and logged, how long are message payloads kept, and can we limit what is stored?
- What error handling, retry, alerting and audit logging is available?
- Does the platform support separate development, test and production environments and version control?
- What are the platform’s uptime SLA and support terms, and how are connector changes communicated when an application’s API changes?
- If we leave, can we export integration definitions in a usable form?
How it differs from API management
API management is about publishing and controlling APIs: securing them, setting usage limits, documenting them for developers and tracking who calls them. iPaaS is about connecting systems: moving data and coordinating actions between applications, often by calling their APIs. They overlap, and some vendors sell both in one platform, but the starting question differs. If you need applications to share data and trigger each other, look at iPaaS. If you need to offer APIs to partners, customers or internal teams under control, look at API management.