Top API Development & Integration Firms

API development and integration firms build the interfaces that let software talk to other software, and wire up the ones that already exist. Work ranges from designing REST, GraphQL or gRPC APIs for a product or partner program to connecting payment gateways, CRMs, ERPs, shipping carriers, messaging platforms and banking or healthcare systems through their published APIs. Companies hire for it when staff retype data between two systems, when partners want programmatic access, or when a monolith is being split into services.

Compare firms here on the systems they have integrated before, the documentation they hand over, and how they handle authentication, versioning and outages when a third-party API fails.

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We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

8,490 Companies

List of the Best API Development & Integration Agencies

Aquil.io
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We develop scalable APIs tailored to your business objectives. Whether you need a website for consumers, an internal application, a mobile app, or an IoT solution, a strong API is essential for all of these. Our expertise lies in creating high-performance APIs that prioritize maintainability.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Dallas, Texas, Us
Services Provided
18% Custom Web Application Development
32% API Development & Integration
25% Go-to-Market Strategy
25% Operational Process Consulting
AI Summary
“Aquil.io specializes in developing scalable, high-performance APIs that support diverse applications—from consumer websites and mobile apps to internal systems and IoT solutions—ensuring maintainability.”
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Creative Data Lab
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With more than five years of experience, I head Creative Data Lab, a team located in the EU that has completed over 200 projects, creating innovative digital solutions. Our services range from SaaS development and eCommerce platforms to custom website design, API integrations, mobile applications, a
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Rumsiskes, Lt
Services Provided
45% Custom Web Application Development
35% API Development & Integration
20% E-Commerce Development
AI Summary
“Creative Data Lab is an EU-based digital solutions provider specializing in SaaS, eCommerce, web and mobile development, API integration, and UX/UI design with a focus on security and support.”
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Symconverge
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Symconverge is a worldwide technology and outsourcing partner that aids businesses in growing through intelligent development, AI solutions, and dependable vendor support. We ensure outstanding performance with efficiency, whether it’s creating software or handling your backend operations.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
35% API Development & Integration
40% Custom Web Application Development
15% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Symconverge is a global technology and outsourcing partner specializing in intelligent software development, AI solutions, and reliable vendor support to enhance business efficiency and performance.”
Dev Canary
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Dev Canary provides software solutions that are both scalable and dependable, addressing your requirements while lowering operational costs and enhancing profit margins.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% Mobile App Development (iOS & Android)
30% API Development & Integration
50% DevOps Engineering
AI Summary
“Dev Canary delivers scalable, reliable software solutions designed to meet diverse client needs, optimizing efficiency, reducing operational costs, and improving profitability across industries.”
TriggerAppy Ltd
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TriggerAppy, established in 2010, is a provider of Business Technology Solutions dedicated to delivering custom software and targeted development projects. As a small, focused team, we prioritize a personalized approach for each client and project, consistently honing in on their needs and objective
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Downpatrick, Northern Ireland, Gb
Services Provided
35% Custom Web Application Development
25% Mobile App Development (iOS & Android)
30% API Development & Integration
10% SaaS Product Development
AI Summary
“TriggerAppy Ltd delivers custom software and mobile app development, specializing in web applications, API integrations, and SaaS solutions primarily for Private Hire and Open Banking sectors.”
Metto
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Metto creates intelligent and scalable digital experiences driven by design, technology, and AI innovation, catering to everyone from startups to large enterprises.
Highlights
$10,000+
Min Project Size
10-49
Employees
Amsterdam, North Holland, Nl
Services Provided+2 Services
12% AI Strategy & Roadmap Consulting
17% Custom AI Chatbot Development
5% Cloud Consulting & SI
33% API Development & Integration
AI Summary
“Metto delivers intelligent, scalable digital experiences through design, technology, and AI innovations, serving diverse clients from startups to large enterprises across various industries.”
AstraEdge Technologies
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We are a dedicated group of developers committed to creating modern, scalable digital solutions for startups and businesses. Our expertise lies in full-stack web development, SaaS platforms, and business automation tools that assist organizations in optimizing operations and expanding online. Utiliz
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
55% Custom Web Application Development
15% E-Commerce Development
30% API Development & Integration
AI Summary
“AstraEdge Technologies specializes in developing scalable, high-performance digital solutions including full-stack web applications and SaaS platforms, helping startups and businesses optimize operations and drive growth.”
Happy Plus Corporation
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We are focused on the following areas: Robotic Process Automation, Internet of Things, traffic measurement, custom artificial intelligence, automated social media uploads, automatic data collection from the internet, heat mapping, and personalized web mapping. **Programming Languages:** TypeScript
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Happy Plus Corporation is a diversified company offering a range of products and services across various industries, committed to innovation and customer satisfaction.”
Conexa Tech Partner
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Conexa is a technology partner that specializes in creating tailored solutions and integrations to enhance products and drive revenue. Established in 2017 as a remote-first company, Conexa has developed over 200 valuable digital products for more than 100 partners across 14 countries. Major corporat
Highlights
$10,000+
Min Project Size
10-49
Employees
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Conexa Tech Partner delivers tailored end-to-end technology solutions and integrations, enhancing user experience and revenue for global clients through agile, innovative product development since 2017.”
Objectgyan Technologies Limited
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We have over 12 years of experience in full-stack development, specializing in creating client-server and web-based database applications. Our main priorities include application performance, usability, maintainability, portability, and scalability. We are enthusiastic about exploring modern technol
Highlights
$100,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Objectgyan Technologies Limited brings over 12 years of expertise in full-stack development, focusing on scalable, maintainable web and database applications utilizing modern technologies for enhanced performance and usability.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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