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

Codup
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Your sales representatives are still processing orders over the phone, and your ERP system has never integrated with your storefront. Your pricing strategies are managed in a spreadsheet, indicating that your operational methods have outpaced your current setup, yet you haven't addressed it. Codup s
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Houston, Texas, Us
Services Provided+1 Services
40% E-Commerce Development
20% Custom Web Application Development
5% Mobile App Development (iOS & Android)
25% API Development & Integration
AI Summary
“Codup develops tailored B2B eCommerce platforms integrating storefronts with ERP and back-office systems, enhancing order automation for mid-sized manufacturers, distributors, and wholesalers in North America.”
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Property Pic Perfection
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Affordable Bulk Real Estate Photo Editing Services We offer a range of services, including HDR Editing, Single Shot Editing, Twilight and Day-to-Dusk transformations, Drone Shots, Video Editing, and Virtual Staging. Our online portal also facilitates Image Editing and Enhancement, Product Listing
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
35% API Development & Integration
15% E-Commerce Development
50% Other Design
AI Summary
“Property Pic Perfection provides affordable, high-quality real estate photo and video editing services, including HDR, drone shots, virtual staging, and backend support through an online portal.”
Centrale Telefonice
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Centrale Telefonice offers cloud-based VoIP phone systems for businesses in Romania, managed by SCIT Technology SRL in Cluj-Napoca since 2009. Our offerings feature cloud PBX, GSM SIM Hosting, AI Call Reports with automatic transcription, virtual AI agents, and Blureon Phone—a native SIP softphone f
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Cluj-Napoca, Cluj, Ro
Services Provided
50% Custom AI Chatbot Development
30% API Development & Integration
20% Custom Web Application Development
AI Summary
“Centrale Telefonice delivers cloud-based VoIP solutions with AI features and integrated Odoo modules, offering comprehensive, contract-free business communication tools with rapid deployment and support in Romania.”
X-Venture Global Solutions
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Utilizing cutting-edge technology to achieve significant returns on investment and accelerate market entry. Focused on understanding customer demands and meeting them through advanced technological solutions. Innovation is prioritized to promote versatility and adaptability, facilitating quicker mar
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Askim, Vastra Gotaland, Se
Services Provided
30% API Development & Integration
20% Mobile App Development (iOS & Android)
50% DevOps Engineering
AI Summary
“X-Venture Global Solutions leverages advanced technology and innovation to deliver quality, adaptable market solutions, fostering teamwork and iterative digital transformation for sustainable business growth.”
Quadracode Srl
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Established in 2008 and located in Turin, Italy, Quadracode Srl provides tailored software solutions and system integration for businesses of all sizes. With over 21 years of experience, we've transitioned from early web development using Classic ASP to becoming proficient in a wide variety of open-
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Torino, Piedmont, It
Services Provided
35% Custom Web Application Development
25% E-Commerce Development
25% API Development & Integration
15% Mobile App Development (iOS & Android)
AI Summary
“Quadracode Srl delivers tailored software, system integration, e-commerce, e-learning, data migration, API, and mobile app development services, enhancing business efficiency across Italy, France, and beyond.”
UmbrellaX
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Umbrellax is a company that harnesses AI technology to develop intelligent agents that optimize and automate business operations. We design tailored chatbots, AI-driven landing page creators, and workflow automation tools specifically for e-commerce, real estate, service industries, and lead managem
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Gurugram, Haryana, In
Services Provided+1 Services
17% Custom AI Chatbot Development
14% LLM Integration & Prompt Engineering
3% Conversational AI & Voice Assistant Development
33% API Development & Integration
AI Summary
“UmbrellaX develops AI-powered solutions, including chatbots and automation tools, integrating advanced technologies to optimize operations and enhance engagement across multiple industries.”
EonixTech Solutions
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We create and develop top-tier software solutions tailored to your business requirements. Our expertise lies in product development and custom software services. With a focus on .NET technology, we produce software that supports continuous delivery and integration, guaranteeing scalability and flexi
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+1 Services
35% Custom Web Application Development
30% API Development & Integration
10% E-Commerce Development
15% Mobile App Development (iOS & Android)
AI Summary
“EonixTech Solutions specializes in custom software and product development using .NET technology, delivering scalable, flexible solutions tailored to diverse business needs with continuous integration support.”
Kodees Labs
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Kodees Labs assists entrepreneurs and companies in turning their concepts into digital products that are ready for the market. Our expertise lies in creating scalable, secure, and high-performance web and backend systems utilizing cutting-edge technologies. We collaborate with you throughout the ent
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
60% Custom Web Application Development
30% API Development & Integration
10% Mobile App Development (iOS & Android)
AI Summary
“Kodees Labs specializes in developing scalable, secure web and backend systems, guiding entrepreneurs and companies from concept to market-ready digital products using advanced technologies.”
SKyware IT Solutions Private.Limited
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Skyware IT Solutions is a tech-oriented firm that specializes in digitizing the hospitality sector, integrating IoT, and providing contemporary web solutions. We assist hotels, serviced apartments, and businesses in the EU and US in optimizing their operations, elevating guest experiences, and boost
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided
60% Custom Web Application Development
30% API Development & Integration
10% Mobile App Development (iOS & Android)
AI Summary
“Skyware IT Solutions specializes in digitizing hospitality through IoT and web solutions, offering consulting, system integration, and ongoing support to optimize operations in EU and US markets.”
Cryptex Technologies
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Since 2007, Cryptex Technologies has been providing tailored software solutions for over 12 years. Our primary focus and expertise lie in creating and delivering robust, scalable, and secure web-based solutions. Over time, we have expanded and diversified into various sectors, including Digital Mark
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
New York, New York, Us
Services Provided
60% Custom Web Application Development
25% API Development & Integration
15% E-Commerce Development
AI Summary
“Cryptex Technologies delivers tailored, scalable web solutions across sectors like Digital Marketing, E-commerce, Cryptocurrency, Learning Management, and Real Estate, emphasizing customer satisfaction and global expertise.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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