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. Compare verified client reviews alongside pricing and capabilities to find the right partner.

How this list is built

We evaluate companies on verified profile data and published client reviews, so you can choose with confidence. We may earn a fee for some placements. How we rank and verify

8,490 Companies

List of the Best API Development & Integration Agencies

VoPay International Inc.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
API-First Embedded Finance Solutions for All Sectors We assist software companies in generating additional revenue by enriching their primary platform services with integrated payments and financial offerings. Our Fintech-as-a-Service solution enables businesses to swiftly implement instant payment
Highlights
10-49
Employees
Vancouver, British Columbia, Ca
Services Provided
35% Custom Web Application Development
65% API Development & Integration
AI Summary
“VoPay International Inc. provides API-first embedded finance solutions, enabling software companies to integrate payments, wallets, and compliance tools for enhanced platforms without infrastructure complexities.”
Webnyze
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Webnyze was established in March 2017 with the aim of delivering usable and actionable web data at scale through a fully managed web scraping service. It was co-founded by Python developers with over ten years of combined experience in web crawling and software development, alongside management prof
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
35% Custom Web Application Development
65% API Development & Integration
AI Summary
“Webnyze delivers scalable, fully managed web scraping services, providing structured, actionable web data via customized APIs and preferred formats, leveraging extensive expertise in web crawling and enterprise solutions.”
MoldaHost
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Since 2006, a team of information technology specialists with extensive experience has been implementing complex technological solutions on a large scale across various economic sectors. With the resources, expertise, and capabilities of our IT company, we offer consulting services, software develop
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Chisinau, Chisinau, Md
Services Provided
60% API Development & Integration
40% Custom Web Application Development
AI Summary
“Since 2006, MoldaHost delivers comprehensive IT services including consulting, software development, engineering, and information security, fostering strong client partnerships across diverse sectors globally.”
Rapidbott
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We create WeBots (Website + Chatbot), Facebook Chatbots, WhatsApp Bots, API Chatbots, and AI Digital Human Bots for your business. Additionally, we offer consultations for Landbot chatbots. Our goal is to help our clients engage with their audiences in the most straightforward and interactive manner
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Manjoor, Tamil Nadu, In
Services Provided
40% Custom Web Application Development
60% API Development & Integration
AI Summary
“Rapidbott develops diverse chatbot solutions including WeBots, Facebook, WhatsApp, API, and AI Digital Human Bots, providing consultations to enhance client engagement effectively.”
etGroups
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are a software development company that creates cutting-edge web and mobile applications customized to meet our clients' requirements. Our expertise lies in system integrations, process automation, and artificial intelligence. By blending experience with innovation, we ensure flexibility and tran
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
60% API Development & Integration
10% E-Commerce Development
30% Mobile App Development (iOS & Android)
AI Summary
“etGroups is a Polish software development company specializing in customizable web and mobile applications, system integrations, process automation, and AI, emphasizing quality and client collaboration.”
FulmenFlux
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Your backend is losing money every millisecond. We analyze, measure, and enhance the infrastructure that supports your business using data rather than estimates. Instead of opinions, we utilize flame graphs. Every engagement begins with precise measurements. We integrate with your observability tool
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Chisinau, Chisinau, Md
Services Provided
40% Custom Web Application Development
60% API Development & Integration
AI Summary
“FulmenFlux enhances business backend performance and cost-efficiency by leveraging data-driven analysis, integrating observability tools, and delivering precise measurements with validated optimization solutions.”
HubBase.io
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
HubBase consists of a team of web developers certified in HubSpot. With more than eight years of experience in HubSpot development, our primary focus is on migrating and creating websites using HubSpot CMS. As a HubSpot partner agency, we have published themes and widgets, including calculators, on
Highlights
$25,000+
Min Project Size
$150+/hr
Avg Hourly Rate
50-249
Employees
San Francisco, California, Us
Services Provided
40% Custom Web Application Development
60% API Development & Integration
AI Summary
“HubBase.io specializes in HubSpot CMS web development, delivering custom API integrations, secure coding, and high-performance solutions, fostering long-term client collaborations.”
Customer's Canvas
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Customer’s Canvas W2P SDK offers a robust set of APIs that streamline design personalization workflows. It features a highly adaptable HTML5 image editing interface that can be integrated with any third-party application. Users have the option to create designs from the ground up or utilize existing
Highlights
10-49
Employees
Alexandria, Virginia, Us
Services Provided
40% Custom Web Application Development
60% API Development & Integration
AI Summary
“Customer’s Canvas provides a flexible HTML5 SDK for seamless design personalization, enabling creation, editing, and PDF export of high-quality print-ready designs within third-party applications.”
CreutoEdverise Pro
1 Review
View Profile Visit Website
CREUTO is a global software development firm that assists startups, scaleups, and established enterprises in creating digital products that are efficient, dependable, and scalable. Our expertise spans custom software, mobile apps, web platforms, SaaS offerings, a
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bhubaneswar, Odisha, In
Services Provided+3 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
10% API Development & Integration
5% SaaS Product Development
AI Summary
“Creuto is a global software development firm delivering bespoke web, mobile, and AI-driven products with senior engineering expertise, creating scalable, value-focused digital solutions across diverse industries.”
InsyteGroup
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Enhanced Business Begins with Superior Data At InsyteGroup, we assist organizations like yours in harnessing their data's potential to make informed business decisions and boost performance. Our comprehensive digital solutions provide an almost real-time overview of your business, featuring interac
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided
50% BI & Big Data Consulting & SI
50% API Development & Integration
AI Summary
“InsyteGroup empowers organizations with comprehensive data solutions, leveraging Microsoft and Databricks technologies to deliver interactive, real-time business insights through skilled engineering and flexible support.”

«Previous

1 2 35 6

...

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.