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

BAT WEB SOLUTIONS
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BAT WEB SOLUTIONS is a technology-focused development agency that creates tailored mobile applications, web platforms, and AI-driven CRM systems. We assist startups and companies in developing scalable, user-friendly solutions in various sectors, including legal technology, over-the-top (OTT) servic
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% Mobile App Development (iOS & Android)
18% API Development & Integration
7% Blockchain & Web3 Development
50% AI Strategy & Roadmap Consulting
AI Summary
“BAT WEB SOLUTIONS develops tailored mobile apps, web platforms, and AI-driven CRM systems for diverse sectors, enabling startups and companies to transform concepts into scalable digital products.”
APIXON
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APIXON offers customized solutions for AI integration, automation, and advanced research. We focus on creating AI-driven businesses rather than merely developing AI systems. Our mission is to enable businesses, regardless of size, to leverage the transformative capabilities of artificial intelligenc
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
30% Custom Web Application Development
20% API Development & Integration
13% AI Strategy & Roadmap Consulting
8% LLM Integration & Prompt Engineering
AI Summary
“APIXON delivers tailored AI integration and automation solutions, empowering businesses to enhance operations and innovate through accessible AI tools and ongoing research support.”
Synerlite
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Synerlite is a technology solutions provider focused on web development, cloud infrastructure, and scalable digital platforms. We offer secure, dependable, and high-performance solutions customized to meet the unique needs of businesses.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% Mobile App Development (iOS & Android)
45% Custom Web Application Development
15% E-Commerce Development
20% API Development & Integration
AI Summary
“Synerlite delivers customized web development, cloud infrastructure, and scalable digital platforms, providing secure and high-performance technology solutions tailored to diverse business needs.”
Naimara
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We are your trusted partner, offering a full range of technological outsourcing solutions. From consulting and software development to operations and service maintenance, we assist our clients with their most ambitious initiatives by providing specialized talent to global corporations, unicorns, and
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Montevideo, Montevideo, Uy
Services Provided+1 Services
25% Custom Web Application Development
18% API Development & Integration
7% E-Commerce Development
30% Web App UI Design
AI Summary
“Naimara delivers comprehensive IT outsourcing services, including consulting, software development, and maintenance, supporting global clients to accelerate growth with specialized nearshore and offshore solutions.”
Hazesoft Pvt. Ltd.
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Hazesoft is a technology consulting firm that prioritizes delivering an outstanding customer experience. We accomplish this through clear and prompt communication, transparency in managing client expectations, a well-coordinated development process, and a proactive, dedicated team. Our talented grou
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Kathmandu, Bagmati, Np
Services Provided+2 Services
10% E-Commerce Development
15% Mobile App Development (iOS & Android)
25% Custom Web Application Development
20% API Development & Integration
AI Summary
“Hazesoft Pvt. Ltd. is a technology consulting firm specializing in IaaS, SaaS, PaaS, applications, and blockchain solutions, committed to transparent communication and exceptional customer experiences.”
ComfyCoders B.V.
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ComfyCoders – Prioritizing Developers. Effective Business Automation. At ComfyCoders, we understand that exceptional software is rooted in the comfort of developers—professionals who are empowered, trusted, and supported to create impactful solutions. Established in the Netherlands, ComfyCoders is a
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided
20% API Development & Integration
20% Custom Web Application Development
10% Mobile App Development (iOS & Android)
50% Operational Process Consulting
AI Summary
“ComfyCoders B.V. is a Dutch software firm specializing in business automation, custom web and mobile apps, and integrations, prioritizing developer comfort to deliver tailored, efficient digital solutions.”
The Xynova
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Xynova is a digital solutions firm that specializes in web development, SEO services, graphic design, and 3D animation. We assist businesses in establishing strong online presences by providing innovative, scalable, and results-oriented digital solutions. Our goal is to empower brands with creative
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
25% API Development & Integration
10% Web App UI Design
5% Interaction Design
5% UX Research & Usability Testing
AI Summary
“Xynova delivers innovative digital solutions including web development, SEO, graphic design, and 3D animation, empowering businesses to enhance online visibility and engagement effectively.”
YHWorks Tech Private Limited
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YHWorks Tech is a custom software development firm that was established in 2017 by experienced technologists, each with over 20 years in engineering. Based in Navi Mumbai, India, with a development center in Pune, we cater to clients in the US, India, and Europe across various sectors, including hea
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Navi Mumbai, Maharashtra, In
Services Provided
40% Custom Web Application Development
45% Mobile App Development (iOS & Android)
15% API Development & Integration
AI Summary
“YHWorks Tech, founded in 2017, delivers expert custom software solutions for regulated industries, including pharmaceuticals and healthcare, with extensive experience in mobile, SaaS, and compliance-driven applications.”
TINT Tech
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TINT Tech S.R.L. is a dedicated team that creates high-quality mobile applications and custom websites that truly deliver results. Our emphasis isn't solely on aesthetics; we also prioritize the technical aspects such as speed, reliability, and seamless animations. Whether developing a new platform
Highlights
2-9
Employees
Bucuresti, Bucuresti, Ro
Services Provided+2 Services
15% API Development & Integration
20% Mobile App Development (iOS & Android)
15% Custom Web Application Development
20% Product UX Strategy
AI Summary
“TINT Tech S.R.L. specializes in crafting high-quality mobile apps and custom websites, emphasizing technical performance, speed, reliability, and user-friendly design to deliver effective digital solutions.”
Artiffine
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Artiffine serves as a comprehensive go-to-market partner for blockchain startups, operating in both the EU and the US. We are a collaborative group consisting of blockchain developers, UX/UI designers, PhD lawyers, and web3 marketers, all united by our enthusiasm for blockchain technology and startu
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Brno, South Moravia, Cz
Services Provided+3 Services
22% Custom Web Application Development
12% API Development & Integration
28% Blockchain Marketing
5% Digital Strategy
AI Summary
“Artiffine is a blockchain-focused partner offering custom software development, digital marketing, and strategic consulting to help startups build, market, and scale Web3 products globally.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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