Relevant Software delivers custom API integration services that connect SaaS platforms, cloud infrastructure, and legacy software into one reliable environment. Our engineers design stable data flows and workflows that keep operations synchronized, reduce manual work, and provide product teams with accurate, real-time insights.
We start with API consulting and strategy to identify which integrations truly matter and which can wait. Our team reviews your existing systems, data flows, and product roadmap, then creates a practical API integration checklist. We also define clear standards for security, performance, and versioning, so all future API integrations follow one shared, measurable plan that’s easy for internal teams, vendors, and partners to work with.
We deliver custom API design and implementation that fits the product, not the other way around. Relevant Software designs resource models, endpoints, authentication, and error handling, then provides custom API integration services across web, mobile, and backend systems. Our API development and integration services keep contracts predictable for internal teams and external partners, with software for API management and scaling.
Our engineers handle internal system integration so that CRM, ERP, inventory, BI, and HR platforms share data rather than duplicate it. We design reliable API integration patterns between core systems, replace fragile scripts, and apply data that respects data ownership, privacy, and compliance. The result is one trustworthy operational view that managers can rely on for reporting, planning, and day-to-day decisions.
Our third party API integration services connect payment, logistics, analytics, and SaaS providers into a single, dependable flow. Relevant Software designs and implements secure connectors, handles authentication and rate limits, and ensures accurate data exchange in both directions. Digital products gain faster rollouts, fewer manual steps, and a stable foundation for partnerships that expand reach without chaos.
We design API orchestration and workflow automation so each request automatically triggers the right actions across systems. Our team builds integration layers that handle routing, retries, and data transformations, and connects them with proven API integration tools and AI platforms. This replaces ad-hoc, manual handoffs with consistent, automated workflows that work reliably across teams, time zones, and vendors.
Relevant Software helps teams integrate microservices and modular architectures without losing traceability or control. We design API integration solutions that keep domain boundaries clear while still supporting shared data, caching, and observability. Our specialists select the right platforms, including open-source options, and define clear service contracts so independent services can evolve safely with frequent change and minimal regression risk.
Our API lifecycle, versioning, and management practices help avoid the chaos that often follows the first launch. We design an API integration platform and API management policies covering discovery, documentation, sandbox access, version deprecation, and monitoring. This way, internal teams and external partners always know which APIs to use, how to authenticate, and when changes are coming, without surprise outages or last-minute rewrites.
Security and governance sit at the center of our API services. Relevant Software defines authentication, authorization, and data protection rules that align with compliance and internal policies. We secure data and API integrations services with encryption, rate limits, and audit trails, and we create governance models that keep future integrations safe without slowing delivery as systems, teams, and regions expand.
We treat API testing and monitoring as core parts of integration, not optional add-ons. Our engineers design automated tests for contracts, performance, and error scenarios, then connect results to CI pipelines. We also add monitoring, alerting, and dependency dashboards so failures appear quickly with clear context before they affect end users or upstream business processes, and key integration metrics remain visible.
API documentation and developer experience determine how fast integrations happen in practice. Relevant Software prepares clear reference docs, code samples, and API integration services examples, then packages them in portals or repositories that developers trust. We reduce onboarding time for internal teams and external API integration service providers, so integrations move predictably rather than stalling due to unanswered questions in real projects.
Our API support and maintenance keep integrations reliable after launch dates and team changes. We track dependencies, deprecations, and upstream partner updates, then adjust configurations or code before issues cascade. Relevant Software acts as a long-term custom enterprise API integration services partner, not a one-off vendor, so API integration companies and product teams avoid costly surprises as products grow.
Data transformation and data-flow management decide whether integrated systems feel fragile or straightforward. Our team designs canonical data models, mapping rules, and validation that support analytics, reporting, and operational data services. We apply data and API integration services to cleanse, enrich, and route information so that each system receives the format, detail, and latency it needs for every downstream use case.
• CRM systems (Salesforce, HubSpot, Zoho)
• ERP platforms (SAP, Oracle, Microsoft Dynamics)
• Marketing tools (Mailchimp, HubSpot Marketing, Google Ads)
• Collaboration platforms (Slack, Teams, Google Workspace)
• Payment gateways (Stripe, PayPal, Adyen)
• Banking APIs, Open Banking, PSD2
• KYC/AML services and credit check APIs
• Shopify, WooCommerce, Magento
• Shipping partners (UPS, DHL, FedEx)
• Inventory, fulfillment, catalog management APIs
• EHR/EMR systems
• HL7, FHIR, DICOM integrations
• Insurance, billing, and pharmacy systems
• Medical device + IoMT APIs
• AWS, Azure, Google Cloud
• CI/CD and DevOps tools (GitHub, GitLab, Jenkins, Azure DevOps)
• Container orchestration and monitoring APIs
• BI and reporting tools
• BigQuery, Snowflake, Redshift, Databricks
• LLMs and ML services (OpenAI, Azure AI, AWS Bedrock)
• Real-time data streaming APIs (Kafka, Pub/Sub)
• Travel (GDS, Amadeus, Sabre, Booking APIs)
• Real estate (MLS, property data APIs)
• Telecom (SMS, VoIP, verification APIs)
• Automotive, manufacturing, IoT platforms
• Proprietary APIs developed for unique system requirements
• Legacy API modernization and replacement
• Multi-version and backward-compatible API setups
Relevant Software engineers offer an API integration service that aligns data from CRM, ERP, marketing, and custom systems into a single, consistent picture. Our team removes conflicting records, replaces manual exports with stable data flows, and builds workflows that move through departments without rework, keeping operations coordinated and decisions grounded in a single source of truth.
Our developers design API integration platforms that automate routine updates, handoffs, and approvals between systems. Teams no longer enter the same data in multiple tools, as requests flow from sales to finance, logistics, and support. That automation cuts input errors, frees hours every week, and returns attention to higher-value product and customer work.
Our team at Relevant Software connects web, mobile, support, and partner systems through custom API integration services so journeys feel consistent from first visit to renewal. Profiles, preferences, and status updates stay aligned across channels, reducing confusion, shortening resolution times, and building stronger trust in the brand and product experience.
Relevant Software engineers build API integration solutions to route events and metrics from operational systems into analytics and BI tools in near real time. Leadership and teams view revenue, churn, inventory, and performance in a single dashboard without scattered spreadsheets, which enables faster decisions, earlier risk detection, and more confident experimentation across products.
Our API development services reduce the need for one-off connectors, fragile scripts, and duplicated effort across teams. Our developers create reusable patterns, shared libraries, and consistent contracts instead of separate integrations for each project. That discipline lowers maintenance work, limits outages, shortens delivery cycles, and protects long-term technology spend as systems and features grow.
Our architects design API integration platforms and microservice contracts that let systems evolve without constant rewrites. Relevant Software engineers separate domains, keep interfaces stable, and plan versioning from the start. That approach supports new channels, regions, and partners while they keep downtime low, so the architecture stays ready for the next phase of the business roadmap.
Partner with Relevant to build secure, scalable API integrations that connect your systems without friction or guesswork.
Relevant Software delivers API consulting, architecture, development, testing, and support with an entirely in-house team. No hidden subcontractors, no fragmented ownership. This model provides complete control over security and timelines, shortens feedback loops, and accelerates the delivery of a complex API integration platform and development work.
Our teams integrate across cloud platforms, on-premise and legacy systems, modern SaaS products, and fully custom software. We understand how these environments behave in real operations, including data constraints, security boundaries, performance limits, and vendor-specific quirks.
API integration projects are led by senior engineers who have delivered complex integrations in regulated and high-risk environments. These specialists understand security controls, data governance, compliance constraints, and operational reliability, not just how to connect systems.
With more than 200 successful software development and integration projects and a client retention rate of nearly 98%, Relevant Software has a proven track record of long-term cooperation. Clients rely on our custom API integration services and data as the backbone of their broader digital transformation.
Our company applies Agile, DevOps, and transparent governance so integration stays on schedule and within budget. Defined scopes, structured communication, and proactive risk control limit scope creep and surprises, which helps new APIs, connectors, and integration solutions reach production when the business expects results.
Relevant Software keeps approximately 80 % employee retention, so the same specialists accompany products across releases. Stable teams remember domain decisions and edge cases, which allows for safe extension of integrations without constant ramp-up. Clients gain a reliable API integration company that preserves knowledge rather than resets it each year.
We map workflows, systems, and data sources, then create an API integration checklist that reflects real-day-to-day operations.
Our security specialists review your data, regulations, and risks with you, then define access rules, encryption, logging, and approvals for every integration.
Our architects turn business needs into a clear integration blueprint, choose tools for API connections, data services, and AI platforms, and design how systems share data.
Developers create new APIs or extend existing ones, write precise contracts, and keep changes safe for current consumers and future versions.
We connect CRM, ERP, ecommerce, logistics, and domain platforms with reusable patterns, so data moves reliably instead of relying on fragile scripts or exports.
Before going live, our team tests with realistic traffic, failure scenarios, and partner sandboxes to confirm performance, stability, and predictable behavior.
We deploy via automated pipelines and configure monitoring, alerts, and dashboards that consolidate latency, error, and dependency health in one place.
We handle issues, updates, and API changes after launch, keeping integrations stable and aligned with your roadmap.
API integration connects software applications so that different systems can share data automatically. Instead of manual work, systems communicate through APIs using standard approaches such as REST APIs, web services, or API gateways. Integration specialists design, build, and manage these connections, following a clear integration checklist and using API management and data services to ensure systems work together reliably and at scale.
API integration examples include synchronizing customer relationship management data with business systems, sending orders into the supply chain, and feeding streams into analytics dashboards. Replace manual data entry between different applications and different platforms with seamless integration that supports business operations and customer experience.
The four types of APIs include public APIs that allow external access, partner APIs shared with approved business partners, internal APIs used within an organization, and composite APIs that combine multiple services into a single request. Together, these API types support secure data exchange, system integration, and efficient application communication across different business use cases.
Yes. Our engineers can integrate several external systems into a single end-to-end process, often bridging modern SaaS with legacy systems that still run critical work. We design custom API integration layers as part of our API integration work, routing events, transforming data, and keeping responsibilities clear so that customer, payment, logistics, and analytics tools behave as one predictable workflow rather than separate, fragile links.
For every project, we start with a security and compliance review. We classify data, check regulations, and define access rules, encryption, and logging before development, with a clear focus on data accuracy from the first design. During operation, we monitor traffic, control configuration, and API changes, and keep clear audit trails so regulators and internal security teams can trace how information moves between systems.
Yes. We provide Salesforce API integration services to connect CRM data with finance, support, analytics tools, and even machine learning models where they add value. Our team also delivers HubSpot API integration services for marketing and sales automation, as well as Azure API integration services that link cloud resources to applications, data stores, and reporting, while keeping the user interface and backend in a single coordinated environment.
Before you go — our clients cut delivery costs by up to 40% and launch products twice as fast.
