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

Pensaers
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Pensaers is a software engineering company led by experienced professionals, catering to clients with challenges that are too intricate, specialized, or critical for conventional development agencies. We handle projects that other firms avoid, delivering them within the agreed timeframe. Our experti
Highlights
$50,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
30% API Development & Integration
20% Legacy System Modernization
18% AI Strategy & Roadmap Consulting
25% Machine Learning Model Development
AI Summary
“Pensaers specializes in complex, critical software engineering across diverse sectors like healthcare and AI, offering a small expert team with full project ownership and timely delivery.”
bambby
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Bambby, our team of expert software engineers is committed to providing state-of-the-art digital solutions for businesses around the globe. We specialize in web and mobile development, cloud computing, AI-driven applications, and enterprise software, assisting companies in turning their ideas int
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Lagos, Lagos, Ng
Services Provided
40% Custom Web Application Development
35% Mobile App Development (iOS & Android)
25% API Development & Integration
AI Summary
“Bambby delivers innovative web, mobile, cloud, AI, and enterprise software solutions globally, leveraging expert engineers to create scalable, high-quality, and client-focused technology applications.”
PIXYRS SOFTECH AND RESEARCH PRIVATE LIMITED
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Pixyrs Softech, an ISO: 9001: 2015 certified company, specializes in Web, Software, iPhone, Mobile, and API Development in India, with offices located in India and the UK, and its headquarters in Jaipur. Our team consists of over 30 highly skilled and experienced professionals. As a consulting and s
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Jaipur, Rajasthan, In
Services Provided
40% Custom Web Application Development
25% API Development & Integration
35% Mobile App Development (iOS & Android)
AI Summary
“Pixyrs Softech, an ISO-certified IT consulting firm based in India and the UK, specializes in web, mobile, and software development, delivering innovative solutions with a client-focused approach since 2016.”
Tokeo Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
**Development:** Tokeo supports your team in testing various use cases by creating Proofs of Concept (POCs) that connect to either a public or a customized private blockchain. Additionally, we can guarantee the effective and secure integration of blockchain services into your existing systems using
Highlights
$5,000+
Min Project Size
2-9
Employees
Paris, Ile De France, Fr
Services Provided
50% Blockchain & Web3 Development
10% Custom Web Application Development
10% Mobile App Development (iOS & Android)
30% API Development & Integration
AI Summary
“Tokeo Software delivers expert blockchain solutions including custom proofs of concept, secure integrations, consultancy, and training, enabling businesses to innovate and effectively embed blockchain technology.”
PSCogxora
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
PSCogxora is a strategic technology and engineering collaborator that helps organizations design, develop, and scale contemporary digital platforms. We operate at the convergence of architecture, cloud technology, and intelligent systems, assisting enterprises and fast-growing companies in transform
Highlights
Savkhede Bk., In
Services Provided
40% Custom Web Application Development
30% API Development & Integration
20% Backend Development
10% Legacy System Modernization
AI Summary
“PSCogxora is a technology partner specializing in scalable, cloud-native digital platforms, leveraging architecture, AI, and engineering to deliver secure, high-performance, and future-ready software solutions.”
Mirko
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
A remarkable IT outsourcing firm with creative business strategies. We offer a highly competitive proposal in the IT industry. We deliver a comprehensive array of services for designing and developing web and mobile applications.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Lutsk, Ua
Services Provided
35% Mobile App Development (iOS & Android)
45% Custom Web Application Development
20% API Development & Integration
AI Summary
“Mirko is an innovative IT outsourcing firm specializing in comprehensive web and mobile application design and development, offering competitive and creative business solutions in the technology industry.”
Vinta Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
In conclusion, we are a development team that truly understands the healthcare sector. With over 13 years of experience and a team of more than 60 specialists, we assist U.S. healthtech firms and care delivery organizations in building and modernizing their systems for care coordination, patient eng
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided
40% Custom Web Application Development
20% Mobile App Development (iOS & Android)
25% API Development & Integration
15% Legacy System Modernization
AI Summary
“Vinta Software delivers custom healthcare software solutions, combining 13+ years of expertise and a 60+ specialist team to enhance care coordination, patient engagement, and healthcare operations for U.S. healthtech clients.”
Aviral Trendz Private Limited
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Aviral Trendz Private Limited aims to be the leading provider of information technology and software services in the industry, dedicated to delivering high-quality code to our clients. We prioritize simplicity over complexity while valuing innovation equally. Our mission is to offer appealing IT sol
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided+1 Services
30% API Development & Integration
20% E-Commerce Development
20% Mobile App Development (iOS & Android)
15% Frontend Development
AI Summary
“Aviral Trendz Private Limited delivers innovative, high-quality IT and software services with robust coding, rapid response, and latest technologies, ensuring business growth and customer satisfaction.”
Talentus LLC
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Our company has a strong history of supplying top-notch talent to Fortune 100 companies aiming to thrive in the modern digital landscape and enhance business growth through effective Digital Transformation initiatives and IT projects. We have partnered with clients from a variety of sectors, includi
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
North Miami, Florida, Us
Services Provided+6 Services
25% API Development & Integration
5% Other IT Consulting and SI
3% ERP Consulting and SI
3% AI Strategy & Roadmap Consulting
AI Summary
“Talentus LLC provides tailored IT talent solutions globally to diverse industries, supporting digital transformation and growth with a high employee retention and direct staffing model.”
Business Pulse
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Business Pulse is an AI-powered, chat-based business intelligence platform that provides insights quickly and easily. Rather than navigating through countless dashboards or waiting for static reports, users can ask questions in simple English and receive immediate, actionable responses. This platfor
Highlights
$5,000+
Min Project Size
10-49
Employees
Services Provided+6 Services
5% AI Strategy & Roadmap Consulting
12% LLM Integration & Prompt Engineering
10% BI & Big Data Consulting & SI
2% CRM Consulting and SI
AI Summary
“Business Pulse is an AI-powered conversational business intelligence platform delivering immediate, actionable insights from data, empowering organizations across sectors to enhance decision-making and operational efficiency.”

...

...

...

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.