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Cloud Application Integration: Stages, Options, Timeline, and Costs

Cloud Application Integration Guide - ScienceSoft

ScienceSoft has been providing cloud application development and integration services since 2012.

Cloud Application Integration: the Essence

The integration of cloud-hosted applications with other cloud or on-premise software of medium complexity usually takes around 8-12 months, including steps like integration planning and design, integration implementation and testing. The project requires a team of a project manager, a business analyst, an integration architect, developers, QA and DevOps engineers.

Cloud Application Integration Roadmap

The steps of the cloud application integration process and their timelines will differ depending on the number of applications integrated, their architecture, required legacy software modification, integration approach, complexity of security and compliance requirements, and more. Below are described the typical steps we at ScienceSoft take to perform cloud application integration.

Cloud app integration roadmap - ScienceSoft

Step 1. Cloud app integration planning and design

Duration: 3-5 weeks

Integration scoping and planning

At this stage, the integration team:











Best practice: We also often define business metrics to help our clients measure and understand the integration initiative success (e.g., improved order processing/delivery time, reduced transaction errors, reduced time to introduce a new software solution, etc.).

Integration approach selection

The team decides on an appropriate cloud app integration approach from 4 major types described below. The choice between direct and mediated integration approaches will depend on the number of application to be integrated, planned short-term and long-term investments, overall IT strategy (for enterprises)/business strategy, non-functional requirements to the integrated system (performance, availability, security), the necessity to integrate with legacy software, and more.

Direct (point-to-point) integration

  • Using tools and/or out-of-the-box integration provided by applications’ vendors.
  • Using custom code.

Mediated integration

  • Using Enterprise Service Bus (ESB). ESB is a central mediator (integration server) that takes over the responsibility for communication between services and undertakes message processing, transformation/modification, and routing, transaction management, process choreography, security management. Special adapters allow the applications to communicate with ESB translating or transforming the message data (e.g., XML to JSON, JMS to HTTP, XML to Java objects).
  • Using an integration platform as a service (iPaaS). An iPaaS solution is a set of cloud services that often includes API management, orchestration, messaging and event management services.

It’s a rare case when a single integration pattern fits all the required connections when several apps are to be integrated. So, often a combination of integration approaches is used.

Optional: evaluation and comparison of tech stacks for the selected integration approach

A BA and a solution architect shortlist 2-3 preferable integration tech stacks (e.g, for an ESB-based integration – Talend ESB and SAP PI, for iPaaS-based integration – Azure iPaaS or Informatica iPaaS) and rate strengths and weaknesses of each option. Together with the project stakeholders, they decide on the most feasible option with the best strategic potential.

Best practice: When our clients also need their external partners to connect, we always keep in mind to discuss if their partners have or ready to employ the required infrastructure and skills to use the chosen integration technologies and support the planned communication standards.

Step 2. Cloud app integration solution implementation and testing

Duration: 5-9 months to develop a new integration solution

The steps of this stage will differ depending on the chosen integration approach. Below, you can find exemplary scenarios for two most popular integration approaches.

Direct integration

  • Designing and installing custom APIs or implementing ready-to-use APIs.

Mediated integration

  • Building or buying a glue layer (message processor/ESB) that will handle message routing, modification, aggregation and changing the mapping of the data.
  • Creating connections – select or build adapters for your applications to communicate with the glue layer.
  • Orchestrating integration:
    • Configuring triggers for requests sent to the service.
    • Configuring invokes for requests sent from the service to the target.

The QA team works on:

  • Verification of all uni- or bidirectional queries between the connected interfaces.
  • Checking the completeness of distributed transactions.
  • Approval of appropriate exceptions handling.
  • Assuring the work of the failover and recovery mechanisms.
  • Checking how well the integrated system works within established bandwidth limitations.
  • Checking how good the system components are at fail-free processing of large data sets and handling an increased number of requests.

Step 3. Integrated system support and evolution

The support team monitors the integrated system performance and handles its scale-ups (the number of users) and scale-outs (the number of the integrated applications).

Cloud Integration Consulting and Implementation by ScienceSoft

With 9 year experience in cloud computing and hundreds of successful integration projects completed, ScienceSoft can help with:

Cloud application integration consulting

Our consultants:

  • Translate your cloud app integration needs into technical requirements.
  • Determine the architecture and tech stack for cloud app integration solution.
  • Outline optimal security, performance, data quality requirements for the integrated system and an integration solution.
  • Ensure the integrated system’s compliance with the required security standards and regulations, including HIPAA, HITECH, SOC 2, SOC 3, and more.
  • Deliver a detailed cloud app integration project roadmap.

Cloud application integration implementation

Our team takes over:

  • Cloud app integration project planning: integration needs documenting and prioritizing, application and infrastructure analysis.
  • The integrated system and an integration solution architecture design.
  • Migration, re-engineering, re-architecting of the to-be-integrated applications (if required).
  • The integrated system implementation and testing (at the system and component levels).
  • After-launch support, user and admin training.
  • Continuous management and evolution of the integrated ecosystem (on demand).

ScienceSoft as a Reliable Cloud Application Integration Partner

We wanted our product to integrate with various ticketing software to collect support tickets, analyze them with AI, and organize the elicited data into charts and visuals.

ScienceSoft’s team undertook the development of our product from scratch and showed deep expertise in the .Net environment and AWS and Azure services.

Bob Penland, Managing Partner, ServicePulse

Project Manager

  • Plans the cloud app integration project, assigns tasks to the integration team and oversees tasks’ execution.
  • Makes sure to provide stated project deliverables on time, on budget and of the required quality.
  • Timely updates required stakeholders on the integration project progress.
  • Communicates with cloud providers, SaaS vendors (in case of enterprise apps integration), and other vendors.

Business Analyst

  • Gathers, clarifies and documents the integrated system requirements.
  • Together with integration architect, defines the integration approach.

Integration Architect

  • Designs the integration between cloud-hosted and other cloud/on-premises apps to meet the technical and business requirements.
  • Develops an app architecture transformation and modernization roadmap (if necessary).
  • Develops technical documentation relating to the integrated system architecture.
  • Creates a strategy for disaster recovery and data integration.
  • Designs frameworks and processes to support API development and management.


  • Builds custom integration code (APIs, ESB, etc.). In case of pre-built integration, sets up triggers, chooses a resulting actions from the other app and selects data to be sent.

DevOps Engineer

  • Configures the integration infrastructure.
  • Automates and streamlines development and release processes by introducing CI/CD pipelines.
  • Monitors the integrated system performance, availability, security, etc.

QA Engineer

  • Designs and implements a test strategy, a test plan and test cases for the integration solution, the to-be-integrated applications, and the target system on the whole.
  • Assures that all availability, performance, security, and compliance requirements of the integrated solution are met.
  • Checks the mechanisms of data validation and transformation, compensation events for failed or incomplete long-running transactions.
  • Provides test summary reports.

The entire cloud app integration process is in-house


  • Direct supervision over the integration process and the team’s work.


  • The integration project can be delayed or compromised due to the lack of the required resources or their insufficient experience.
  • (for enterprises) The IT department may have to give up other priority projects to build the integration.
  • All hiring and managerial efforts are on your side.

Partial or full outsourcing of technical resources


  • Quick integration project start.
  • Optimal human resource usage at peak times.
  • Quick access to specific tech knowledge when required.


  • Project team coordination, concerns about quick and quality integration solution delivery are partially or totally on your side.

Full integration process outsourcing


  • A vendor assumes full responsibility for the integration project, including:

    • Team ramp-up and management.
    • Integration solution design.
    • Establishment and coordination of the integration process.
    • Quality of the project results.


  • High vendor risks.

Fancy Reliable Integration for Your Cloud Apps?

ScienceSoft plans, designs and implements quality integration of custom cloud apps and SaaS products.

Technologies We Recommend for Cloud App Integration

At ScienceSoft, we often choose the following technologies for our cloud application integration projects:

Azure Integration Services

Best for: hybrid integration


  • Among leaders in 2020 Gartner Magic Quadrants for Enterprise iPaaS and Full Life Cycle API Management.
  • Comprehensive set of integration capabilities covering applications and data with over 370 connectors.
  • Serverless integration via Azure Functions.
  • Services and tools support multi-cloud, on-premises and edge computing environments.
  • Azure Integration Services is part of the larger Azure offering, giving you immediate, integrated access to any other cloud services you need, e.g., Azure Data Lake Storage for storing large volumes of unstructured data.

AWS Integration Services

Best for: data integration


  • Comprehensive messaging suite comprising Amazon SNS (fully managed Pub/Sub messaging), Amazon SQS (fully managed message queues), Amazon MQ (managed message broker service for Apache ActiveMQ).
  • AWS AppSync (to create flexible GraphQL APIs to securely access, manipulate, and combine data from one or more data sources) and API Gateway (to create, maintain, and secure REST APIs at any scale in serverless and web development).
  • AWS Step Functions and AWS Lambda for serverless development.

Informatica Intelligent Cloud Services

Best for: enterprise application integration


  • A leader in Gartner’s Magic Quadrant for Enterprise iPaaS for 7 years straight.
  • Unified user experience across all data management services.
  • The AI/ML-driven CLAIRE™ engine to accelerate and automate data governance processes.
  • Cloud-native and scalable integration.
  • Multi-cloud and serverless environments.
  • The industry’s highest number of security certifications among cloud app integration solutions, including SOC 2, SOC 3, HIPAA, and HITECH.


Starting at $2,000/month, free 30-day trial.

SAP Cloud Platform Integration

Best for: specialized enterprise application integration


  • Among leaders in 2020 Gartner Magic Quadrant for Enterprise iPaaS.
  • SAP’s API Business Hub offers access to rich integration content packs with over 1,500 prebuilt, ready-to-run integrations, APIs and events that target specific business processes.
  • Connects cloud applications with SAP and non-SAP cloud and on-premises applications.

Cloud Application Integration Costs

The costs will vary depending on the specifics of the integration project. Major cloud application integration cost factors include:

  • The number of applications to be integrated and the number of integration points.
  • Cloud app integration approach (development of custom integration solution from scratch will require approximately ~4-6 FTE).
  • Integration-readiness of the applications (both on the technical level and on the app logic level).

Types of costs related to cloud application integration

Integration solution infrastructure


  • Licensing for middleware (e.g., third-party ESB)
  • Infrastructure for SOA implementation (service connector, service descriptor, asynchronous response handler, service interceptor, etc.).
  • Additional computing to run new software

Skills development / acquisition


Re-training of current resources / hiring of experts (either on the outsourcing or in-house basis) for:

  • Building custom adapters/APIs or tailoring off-the-shelf adapters
  • Designing and coding application modifications (if required)
  • Implementing the integration solution: message broker/ESB/iPaaS (if required)

View more

  • Introducing/updating compliance requirements
  • Ensuring data quality – data validation and standardization
  • Planning and introducing various types of testing for separate components and the integrated system on the whole (incl., development and maintenance of automated tests).
  • Monitoring performance, availability, security, data quality, etc. and troubleshooting during and after integrated system implementation


(for enterprises) Business costs


  • Establishment of cross-department teams for integration planning and evolution.
  • Lost productivity and downtime associated with transitioning to new business processes, integration ramp-up, and business user training / knowledge transfer.

About ScienceSoft

A global IT consulting and IT services company headquartered in McKinney, TX, ScienceSoft provides end-to-end application integration services. We leverage our expertise to execute industry- and function-focused integrations and keep your integration journey quick and smooth. As the holder of ISO 9001 and ISO 27001 certifications, we rely on mature quality management and guarantee the cooperation doesn't pose any risks to the customers' data security.