Your one-stop API partner. We design robust REST, GraphQL and gRPC APIs, and connect your product to the CRMs, payment, ERP and third-party systems it needs, securely and reliably.
Trusted by teams worldwide
From a single endpoint to a connected platform. Six service lines cover every part of building and integrating modern APIs.
Six engineering disciplines behind every API and integration we ship, and the tools we use for each.
Well-designed, documented APIs with versioning, auth, pagination and caching.
Reliable connections to CRMs, payments, ERPs and any third-party system.
OAuth2, JWT, API keys and gateways that keep your APIs safe and controlled.
Webhooks, queues and streams with delivery guarantees and idempotency.
APIs over databases and legacy systems, with ETL and safe data access.
OpenAPI docs, developer portals, contract tests and monitoring with SLAs.
A short call and a look at the systems you want to connect tells you exactly what is possible, the cleanest approach and a fixed budget. So your first dollar goes toward something reliable.
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A clear, low-risk process that keeps you in the loop at every step.
We map the systems, data and use cases, choose the approach and agree a fixed quote.
API contracts, data mapping and security design before we build.
We build APIs and integrations in sprints with tests and demos.
Contract, load and security testing, plus a sandbox to try it out.
Go live with docs, monitoring, alerting and an uptime SLA.
APIs and integrations delivered for startups and enterprises worldwide.
Monitored, reliable APIs that stay available under load.
Connections to CRMs, payments, ERPs and third-party systems.
Throughput our gateways and APIs handle in production.
Real products, real users, real numbers, across health, mobility, delivery and education.
Mood tracking, guided sessions and personalised wellness plans in a warm, calming experience.
Live driver tracking, surge-aware fare estimation and multi-payment support in a fast, reliable app.
Live order tracking, smart dispatch and route optimisation that cut delivery times across 200+ restaurants.
Coach matching, personalised study plans and adaptive progress tracking for 10K+ students.
Every bullet is something we've actually shipped, not a sales pitch.
HIPAA-ready products for patients, providers and wellness.
Secure, compliant products for payments and money movement.
Commerce that converts and keeps customers coming back.
Real-time products for delivery, dispatch and field teams.
Engaging learning products for students and coaches.
Property products for search, tours and lead capture.
“Appther built our student competition app exactly the way we envisioned it: easy registration, smooth judging, and real-time results that keep participants engaged.”
“Building a mental health app means every detail has to be handled with care, and Appther got that from day one. The product feels warm, simple, and genuinely helpful.”
“Appther exceeded every expectation, on time and on budget, and the final product has been instrumental in scaling our business. A rare engineering partner.”
“Implementing an ERP across our operations felt daunting at first, but Appther made the transition seamless. Every department now works off a single source of truth.”
Field notes from real builds. No hype, just what worked and what didn't.
The principles we follow for clean, predictable API design.
How we build event-driven integrations that never lose data.
The auth, rate limiting and gateway patterns we apply.
A clear breakdown of what drives API cost, and how to scope it.
Walk away from one call with a clear integration plan, the right API design, a realistic budget range and a delivery timeline. No pitch deck, no obligation.
Tell us what you need to build or connect. No sales pitch, just a straight answer on approach, scope, timeline and cost.
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