A Most businesses run on a dozen systems that don't share data — so people re-key information, reports drift out of sync, and work leaks between the gaps. Billow's API integration services connect your applications, data and SaaS into one system that works together, with the API development, integration and management to keep it reliable.
API and integration services connect separate applications, data and systems so they can work together — building the APIs that expose an application's data and functions, and the integrations that move data and trigger actions between systems. The result is one connected environment instead of isolated silos that force manual re-keying and leave data out of sync.
Almost every business runs on systems that were never designed to talk to each other — a CRM here, an ERP there, finance, HR, a warehouse of SaaS tools, plus internal applications. Without integration, people become the glue: exporting spreadsheets, copying fields, reconciling numbers that should have matched automatically. That manual work is slow, error-prone and quietly expensive. API-led integration replaces it with reliable, automated connections.
Billow designs and builds the full picture — REST APIs and other API development, system integration and application integration, enterprise middleware, API management and gateways, and data integration through iPaaS where it fits. Our API integration work connects cloud, on-premises and third-party SaaS systems with security, error handling and monitoring built in, so data flows correctly and the integrations keep working as your landscape changes.
Our API and integration services cover the whole surface — designing and building APIs, integrating systems, and managing and governing it all so the connections stay reliable.
Well-designed REST and GraphQL APIs that expose your applications' data and functions cleanly, securely and consistently — built to be consumed.
Reliable integrations that connect your applications and move data between them — replacing manual exports and re-keying with automated flows.
Middleware and integration patterns that tie many systems together at scale — event-driven, message-based and API-led architectures.
Publish, secure and monitor your APIs — authentication, rate limiting, versioning and analytics behind a single, governed API gateway.
Cloud integration through iPaaS platforms and connectors — moving and transforming data between SaaS and on-premises systems quickly.
Monitoring, error handling and support that keep integrations healthy — because APIs and systems change, and connections need tending.
When systems don't talk, people fill the gap — re-keying data, reconciling mismatches, chasing the real number. API and integration services close those gaps, so data moves itself and your systems stay in sync.
Integrated systems share data automatically — so numbers match, records stay current, and no one wonders which spreadsheet is right.
Automated flows replace exports, copy-paste and re-keying — removing the slow, error-prone glue work between systems.
API management and gateways give you control — authentication, rate limits and monitoring — over who accesses what, and how.
API-led architecture makes the next integration easier — new systems and partners plug into what you've already built.
We match the integration style to the need — from clean API-led connectivity to event-driven architecture and cloud iPaaS.
REST · GraphQL · gateways
Reusable APIs behind a managed gateway — the cleanest, most governable way to connect systems and expose data securely.
Messaging · queues · pub/sub
Loosely coupled, event-driven integration for real-time flows and scale — systems react to events instead of polling.
Connectors · data integration
Cloud integration platforms and connectors that link SaaS and on-premises systems fast — with mapping and orchestration built in.
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We map your systems, data and the flows between them — finding the gaps, the manual glue work and the integrations with the best return.
We design the integration architecture and API contracts — choosing API-led, event-driven or iPaaS patterns to fit each connection.
We build and test the APIs and integrations, with security, error handling and monitoring in from the start, not bolted on later.
We manage the running integrations — monitoring, alerting and adapting them as APIs and systems change over time.
API and integration services connect separate applications, data and systems so they can work together. That includes building APIs that expose an application's data and functionality, and creating integrations that move data and trigger actions between systems — whether on-premises, in the cloud or third-party SaaS. The goal is one connected environment instead of isolated silos that force manual re-keying and duplicate data.
An API is an interface a system exposes so other software can request its data or trigger its functions in a controlled way. An integration is the actual connection between two or more systems that makes them work together, often built by consuming those APIs. Put simply: an API is the door; an integration is the traffic flowing through it to get a job done across systems.
API management is how you publish, secure, monitor and govern APIs across their lifecycle — handling authentication, rate limiting, versioning and analytics. An API gateway is the component that sits in front of your APIs to enforce those policies, route requests and provide a single, secure entry point. Together they let you expose APIs safely to internal teams, partners or customers.
iPaaS — integration platform as a service — is cloud-based tooling for building and running integrations without managing your own middleware infrastructure. It provides pre-built connectors, data mapping and workflow orchestration to connect SaaS and on-premises systems quickly. We use iPaaS where it accelerates delivery, and custom or event-driven integration where more control is needed.
Yes. Most integration work involves connecting the SaaS and third-party systems businesses already run — CRM, ERP, finance, HR, marketing and more — to each other and to internal applications. We build reliable, secure integrations using each system's APIs, with error handling and monitoring so data stays consistent and the connections keep working.
Integration ties the practice together. These related application services extend and complete it.
The full practice this sits within — application modernization, custom development and API & integration.
We build custom applications API-first, so the software we deliver integrates cleanly with the rest of your systems from day one.
Modernizing legacy applications usually means untangling old integrations — we rebuild them as clean, modern APIs.
Tell us which systems your team keeps re-keying data between, and we'll show you how APIs and integration could connect them — so the data moves itself.
