When does building an integration platform make sense?

Self-hosting n8n, Temporal, or Trigger.dev makes sense when integration patterns are narrow and well-defined, when your team already uses an orchestration framework, and when you don't need a broad vendor connector library for long-tail SaaS applications.

When does buying iPaaS make sense?

Buying makes sense when managing 50+ integrations with monitoring, governance, and connector breadth requirements — the operational overhead of building error handling and retry logic across that many connections is substantial, and mid-market platforms now undercut legacy enterprise pricing significantly.

What are the main iPaaS vendors?

Representative vendors include MuleSoft (Salesforce), Workato, Tray.io, Boomi (Dell). B4 Pro scores the full set.

Dev & Engineering · Engineering, IT & AI

Should you build or buy iPaaS?

iPaaS (Integration Platform as a Service) software connects disparate business applications, automates data flows between systems, and orchestrates multi-step workflows across cloud and on-premises tools so teams can move data and trigger actions without writing custom integration code for every connection.

The build-vs-buy decision for iPaaS turns on whether your integration footprint is broad enough to justify a multi-connector platform and whether your team prefers a managed orchestration layer over self-hosted workflow tools; the specifics of integration count and engineering capacity decide it.

Domain: Dev & Engineering
Function: Engineering, IT & AI
Industries: Cross-industry

Last assessed June 2026 · re-scored quarterly via The Continuum.

Build it, buy it, or bridge?

	Build it	Buy it	Bridge (buy, then extend)
Cost shape	n8n, Temporal, Trigger.dev self-hosted at near-zero license cost	Enterprise iPaaS runs $95K–$210K/yr; SMB tiers more accessible but still meaningful	Self-host n8n or Temporal for standard flows; buy narrow-purpose connectors
Time to value	Days to configure orchestration; weeks to replicate a broad connector library	Pre-built connectors get 50-connector environments running in weeks	Deploy self-hosted core; pull vendor connectors for long-tail integrations
Differentiation captured	Full control over error handling, retry logic, and data transformation patterns	Integration is operational plumbing; vendor-standard patterns are adequate	Own critical integration logic; delegate commodity system connections to vendor
AI feasibility today	n8n, Temporal, Inngest documented in production as self-hosted integration platforms	AI-native iPaaS tools cutting costs 40–60% vs. legacy MuleSoft/Boomi	AI-assisted workflow generation on self-hosted engine reduces engineering time
Who it fits	Engineering-led teams with narrow integration patterns and orchestration expertise	Orgs managing 50+ integrations needing monitoring, governance, and connector breadth	Teams replacing legacy enterprise iPaaS without fully rebuilding integration layer

The B4 call

B4 has a verdict for iPaaS.

Build, Buy, Bridge, or Beware, with the five-dimension scorecard and the reasoning behind it. Unlock the call, and every other category, with B4 Pro.

Unlock the verdict in B4 Pro →

When building iPaaS makes sense

Building your own integration infrastructure — typically by self-hosting n8n, Temporal, or Trigger.dev — makes sense when your integration patterns are narrow and well-defined, your engineering team already uses an orchestration framework, and you don't need broad connector coverage from a vendor library. The OSS options have matured: n8n v6.1.0 runs in production with an active community, Temporal handles durable workflow execution at scale with no license cost, and Inngest provides event-driven orchestration. The cost arithmetic is compelling when the alternative is a six-figure MuleSoft or Boomi contract: enterprise iPaaS at the top tier runs $210K for MuleSoft versus $95K for Boomi for comparable scope, and the documented response has been moving to cheaper platforms rather than from-scratch builds. The genuine build case is when your integration patterns are specific enough that a generic connector library adds no value, when data residency requirements prevent a SaaS orchestration layer, or when your team's existing Temporal expertise makes the operational burden trivial. The warning is that from-scratch integration systems end up expensive to maintain once API churn and error handling edge cases accumulate — vendor-led efforts succeed at roughly twice the rate of purely custom builds.

When buying iPaaS makes sense

Buying iPaaS earns its keep when you're managing 50 or more integrations with monitoring, error handling, and governance requirements across them. The operational overhead of running that many connections without a platform layer is real: error visibility, retry logic, alerting on failures, and audit trails across dozens of systems require infrastructure that takes time to build and maintain. Workato, Celigo, and Boomi provide connector libraries covering hundreds of SaaS applications and ERPs that would take months to build individually. For non-engineering teams who need to configure integrations without writing code, the iPaaS visual builder is genuinely enabling. The market is also diversifying: AI-native and mid-market platforms are undercutting legacy enterprise pricing by 40–60%, which means you don't have to choose between a $200K MuleSoft contract and building everything yourself. Tray.io, Workato, and Make represent a middle tier worth evaluating. The build case only clearly wins when integration patterns are narrow, internal engineering expertise is strong, and you're comfortable owning the long-term maintenance of API contracts across every connected system.

Enterprise iPaaS pricing at the top tier is hard to justify for mid-market buyers. MuleSoft and Boomi carry six-figure annual contracts that are difficult to fully utilize, and the documented reaction has been a move toward AI-native and lower-cost platforms rather than in-house builds. n8n, Temporal, and Trigger.dev have emerged as real self-hosted options with active communities, covering workflow automation and integration at meaningfully lower cost.

The buying case holds when you're managing 50 or more integrations with monitoring, error handling, and governance requirements across them. The operational overhead of running that many connections without a platform layer is real. Workato and Celigo both provide connector libraries and observability that would take significant time to replicate. The build case opens when your integration patterns are narrow and well-defined, your engineering team already uses orchestration tools like Temporal, and the use case doesn't require broad connector coverage from a vendor library.

Representative vendors

WorkatoMuleSoft (Salesforce) and 3 more, scored in B4 Pro

B4 Pro

Get B4's actual call on iPaaS

→ B4's call for iPaaS: Build, Buy, Bridge, or Beware
→ The five-dimension scorecard and the scoring rationale
→ All 5 vendors with pricing and positioning
→ Quarterly re-scores that feed the MCP live, so your agents always query the current call
→ MCP server plus API and SDK access, and CSV/JSON export

Upgrade to B4 Pro

Prefer to read first? The book covers the framework end to end.

Frequently asked

What is iPaaS?: iPaaS software connects disparate business applications, automates data flows between systems, and orchestrates multi-step workflows across cloud and on-premises tools so teams can move data and trigger actions without writing custom integration code for every connection.
When does building an integration platform make sense?: Self-hosting n8n, Temporal, or Trigger.dev makes sense when integration patterns are narrow and well-defined, when your team already uses an orchestration framework, and when you don't need a broad vendor connector library for long-tail SaaS applications.
When does buying iPaaS make sense?: Buying makes sense when managing 50+ integrations with monitoring, governance, and connector breadth requirements — the operational overhead of building error handling and retry logic across that many connections is substantial, and mid-market platforms now undercut legacy enterprise pricing significantly.
What are the main iPaaS vendors?: Representative vendors include MuleSoft (Salesforce), Workato, Tray.io, Boomi (Dell). B4 Pro scores the full set.

The B4 Index scores every software category on two axes, strategic differentiation and AI feasibility, to classify it Build, Buy, Bridge, or Beware. See the full methodology.

More in Dev & Engineering

Build or buy DevOps Platform? Build or buy CI/CD? Build or buy Version Control? Build or buy Low-Code / No-Code? Build or buy Infrastructure as Code (IaC)? Build or buy API Management? Build or buy SAST? Build or buy DAST? Build or buy Code Quality Analysis? Build or buy Container Registry? Build or buy Release Orchestration? Build or buy Application Portfolio Management?

The Build Report

Bi-weekly analysis of software categories through the B4 Framework. What to build, what to buy, and how to use AI to make better decisions for your company.