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.

How this list is built

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

ProsperSpark
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
ProsperSpark enables businesses to operate more efficiently by optimizing processes through customized solutions. Our expert team focuses on integrating with tools you already use, such as Excel, Airtable, and Salesforce, to develop effective, scalable systems that simplify everyday tasks. Whether y
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
5% AI Strategy & Roadmap Consulting
18% Robotic Process Automation (RPA)
15% CRM Consulting and SI
5% ECM Consulting and SI
AI Summary
“ProsperSpark delivers tailored process optimization and automation solutions by integrating with existing tools like Excel and Salesforce, enhancing business efficiency and enabling scalable, purpose-driven workflows.”
LogiQbits Limited
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
LogiQbits assists overseas software companies and small to medium-sized businesses in enhancing their capabilities by providing dedicated engineering teams, white-label product development, and comprehensive delivery of enterprise software solutions from our development center in Bangladesh. We offe
Highlights
$10,000+
Min Project Size
10-49
Employees
Dhaka, Dhaka, Bd
Services Provided
50% API Development & Integration
35% Custom Web Application Development
15% Mobile App Development (iOS & Android)
AI Summary
“LogiQbits partners with overseas software firms and SMBs to deliver custom enterprise software solutions, leveraging dedicated teams, diverse tech stacks, and comprehensive product development from Bangladesh.”
GenAI Protos
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
GenAI Protos is a dedicated AI development and enterprise solutions provider that assists businesses in rapidly transforming their AI concepts into fully operational, production-ready systems. Based in Irvine, California, the company caters to startups and large enterprises worldwide, effectively br
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Irvine, California, Us
Services Provided+2 Services
10% Generative AI
18% AI Agent & Multi-Agent System Development
7% Custom AI Chatbot Development
10% Machine Learning Model Development
AI Summary
“GenAI Protos, based in Irvine, CA, accelerates AI development with tailored, production-ready enterprise solutions across industries, delivering scalable and efficient AI systems within weeks.”
DAS Consultancy Services GmbH
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are an IT consulting and service firm located in Munich, Germany. Our offerings include the following IT development and migration services: - Cloud services (Hybrid and Multi-Cloud) - API development and management - DevSecOps - Observability platforms - Design, development, and mainte
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Munich, Bavaria, De
Services Provided
50% API Development & Integration
40% Cloud Consulting & SI
10% Other IT Consulting and SI
AI Summary
“DAS Consultancy Services GmbH is a Munich-based IT firm providing cloud solutions, API management, DevSecOps, application development, security services, and technology training.”
Raddiz Technologies Inc.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Specialist in Zoho One ERP Implementation and a proud advocate for Canadian technology and innovation. Our well-established industry solutions and thorough Zoho One implementation services support the digital transformation of small and medium-sized businesses, enabling them to elevate their operati
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Toronto, Ontario, Ca
Services Provided+1 Services
18% CRM Consulting and SI
25% ERP Consulting and SI
5% Cloud Consulting & SI
2% Other IT Consulting and SI
AI Summary
“Raddiz Technologies Inc. specializes in Zoho One ERP implementation, supporting Canadian SMEs in digital transformation to enhance operational efficiency and foster business growth through technology.”
Naonis
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We assist B2B companies in eliminating CRM inefficiencies through automation. Our approach streamlines, automates, and integrates their internal software systems to enhance efficiency and service, cut costs, and boost profits. We specifically support organizations with over 100 employees in the USA
Highlights
$10,000+
Min Project Size
$150+/hr
Avg Hourly Rate
Horsley, New South Wales, Au
Services Provided
50% API Development & Integration
50% CRM Consulting and SI
AI Summary
“Naonis streamlines B2B CRM processes by automating and integrating diverse SaaS systems, enhancing operational efficiency, reducing costs, and maximizing profits for mid-size US and Australian companies.”
Antematter
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Antematter, we develop AI solutions that are practical, transparent, and completely under your control. In recent years, we have collaborated with over 40 organizations to go beyond the hype and achieve tangible results with AI. Our method is straightforward: identify the bottleneck process, vali
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Islamabad, Pk
Services Provided+1 Services
20% Custom AI Chatbot Development
10% AI Model Fine-Tuning & Training
8% Machine Learning Model Development
12% Generative AI
AI Summary
“Antematter develops transparent, AI-driven automation solutions across industries, delivering quick proofs-of-concept and certified, self-explanatory systems that enhance operational efficiency and control.”
TartanHQ
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
TartanHQ bridges the gaps between disparate enterprise systems and facilitates AI-enhanced workflows via three main products: HyperSync - Merges over 100 HRIS, ERP, and CRM platforms to consolidate and standardize isolated enterprise data in real-time without the need for custom connectors. HyperApp
Highlights
$75,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Gurugram, Haryana, In
Services Provided
20% Custom AI Chatbot Development
30% AI Agent & Multi-Agent System Development
50% API Development & Integration
AI Summary
“TartanHQ integrates diverse enterprise systems and delivers AI-powered workflows and real-time verification tools to streamline data management, enhance compliance, and improve onboarding processes.”
tugrulyildirim.com
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Hello, I'm an SEO expert based in Istanbul, Turkey. I specialize in SEO and social media management, and I also develop web applications using PHP 7. If you're looking to increase your website traffic, feel free to reach out to me.
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
Arnavutkoy, Istanbul, Tr
Services Provided
50% API Development & Integration
17% CRM Consulting and SI
17% ERP Consulting and SI
16% Other IT Consulting and SI
AI Summary
“tugrulyildirim.com is an Istanbul-based SEO expert offering SEO, social media management, and PHP 7 web application development to enhance website traffic and online presence.”
Quezaal
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Quezaal Inc., located in Minneapolis, Minnesota, specializes in technology and offers development services in AI and machine learning, generative AI solutions, and cloud-native software engineering. We create intelligent systems that are accurate, flexible, and designed for longevity, using our uniq
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Plymouth, Minnesota, Us
Services Provided+2 Services
50% API Development & Integration
10% AI Strategy & Roadmap Consulting
20% Generative AI
5% BI & Big Data Consulting & SI
AI Summary
“Quezaal Inc., Minneapolis-based, delivers advanced AI and machine learning development, generative AI solutions, and cloud-native software, focusing on intelligent, adaptable, and durable technology systems.”

«Previous

...

7 810 11

...

849

...

849

Latest insights & expert perspectives

Explore data-backed surveys with inputs from top industry experts.

Stated minimum project sizes among the firms listed under software development services on Edverise, with the $50,000 band shaded

Vendor Selection

Questions to Ask a Software Development Agency: Six With Proof

A vetting script for second-round agency calls: six questions, the document each answer has to produce, and what a directory listing or a badge really proves.

Nihar Ranjan Rout

10/31/2026

Three software development quotes of $38,000, $94,000 and $210,000 converted to effective hourly rates of $79, $73 and $87.50

Vendor Selection

How to Compare Software Development Quotes Priced 5x Apart

Three bids for the same build are rarely comparable as written. A normalization checklist, a weighted grid adapted from FAR Part 15.3, and the hourly arithmetic.

Akash Mohapatra

10/31/2026

Chart of minimum project size stated by firms listed under AI agent development on Edverise, with the $50,000 band highlighted

Vendor Selection

AI Agent Development Cost: Build, Tokens, Reliability

An AI agent has three costs. Compute the monthly token bill from published list prices, then set the build quote against what listed firms actually charge.

Santanu Prasad Sahoo

10/31/2026

Check All Our Blogs

One Platform. One Promise. One Trust.

Edverise is building the trusted way to find tech vendors. List your company early, or talk to us about backing the platform.

Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

Where buyers look next

Latest insights & expert perspectives

Questions to Ask a Software Development Agency: Six With Proof

How to Compare Software Development Quotes Priced 5x Apart

AI Agent Development Cost: Build, Tokens, Reliability

One Platform. One Promise. One Trust.