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Top API Developers in Chicago

Ratings Updated: April 3, 2026

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6 Leaders 15 Contenders

4 Companies

Country: United States

State: Illinois

City: Chicago

API Type: SOAP API

List of the Top Chicago API Development Services

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Profusion Systems

5.0 4 reviews

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$5,000+

$25 - $49 / hr

10 - 49

Downers Grove, IL

Services provided

10% API Development

30% Custom Software Development

15% Mobile App Development +5 services

10% Back Office Outsourcing

10% Cloud Consulting & SI

10% E-Commerce Development

10% IT Strategy Consulting

5% AI Development

Profusion Systems is a highly regarded company specializing in API Development Services and API Integration. They deliver efficient and value-driven API solutions, as evidenced by positive feedback from clients who appreciate their timely project completion and unique problem-solving capabilities. Approximately 100% of reviewers highlight their effective communication and adherence to budget constraints.

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Industry Experience

Profusion Systems has demonstrated expertise across diverse industries including Food & Beverage, Nonprofit, and Retail. In Food & Beverage, they excelled in creating custom platforms and API integrations, enhancing operational efficiency. In the Nonprofit sector, they provided robust website support and cloud infrastructure, meeting project objectives without delay. Their work in Retail involved developing intricate applications that streamlined operations for large-scale food services. Overall, clients commend their responsiveness, project management, and ability to deliver tailored solutions effectively.
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Food & Beverage Nonprofit Retail

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Average Project Cost Breakdown

$10,000 to $49,000 (1) $50,000 to $199,999 (1) $200,000 to $999,999 (1)

What Clients Have Said
Clients consistently express satisfaction with Profusion Systems' pricing and value for money. One client noted that their 'pricing fit our budget' and highlighted 'good value for cost.' Another stated that Profusion 'delivered on time and on budget,' emphasizing the positive return on investment. Overall, clients appreciate the company's ability to provide high-quality solutions while remaining flexible and responsive, often exceeding expectations without escalating costs.
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1 of 1 Chicago-based review is 5 stars

$50,000 – $199,999 avg. project cost for API Development services in Chicago

Chicago-based API Development project highlight

ERP & API Development for Food Servicing Company
5.0 — Profusion Systems has developed a custom ordering platform for a food servicing company. The team has created custom API endpoints, built custom workflows within NetSuite, and integrated Read more
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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

4.8

Cost

5.0

Willing to Refer

5.0

Local clients in Chicago praise Profusion Systems for their ability to create tailored applications, APIs, and cloud solutions across diverse industries. Their responsive team consistently meets deadlines, providing scalable, cost-effective tech solutions that enhance operational workflows and data accuracy.
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Hristov Development

5.0 11 reviews

$5,000+

$25 - $49 / hr

10 - 49

Chicago, IL

Services provided

10% API Development

10% Application Management & Support

10% Cloud Consulting & SI +7 services

10% Custom Software Development

10% E-Commerce Development

10% IT Managed Services

10% IT Staff Augmentation

10% Mobile App Development

10% UX/UI Design

10% Web Development

Hristov Development is a custom software development agency specializing in AI integration, IT consulting, and agile prototyping. Their reviews demonstrate a 100% positive reception, with clients highlighting their technical expertise, proactive communication, and customer-centric approach. Notably, 80% of reviewers emphasized their innovative solutions and reliable project management. The company is praised for exceeding expectations and delivering timely, scalable, and user-friendly solutions.

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Industry Experience

Hristov Development has demonstrated expertise primarily in the Software, Real Estate, Consulting, and Research industries. Clients in Software praised their custom software development and AI integration capabilities, noting significant improvements in user engagement and operational efficiency. In Real Estate and Consulting, feedback highlighted their agile development support and responsiveness. The Research sector noted their ability to create scalable, user-friendly platforms. Overall, sentiment across industries reflects strong satisfaction with their technical skills, project management, and customer-centric approach.
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Software Real estate Consulting Research

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Average Project Cost Breakdown

Less than $10,000 (1) $10,000 to $49,000 (1) $50,000 to $199,999 (1)

What Clients Have Said
Clients consistently commend Hristov Development for their competitive pricing and exceptional value for money. One client noted that their 'pricing fit our budget' and emphasized the company's alignment with their values. Another remarked on the 'good value for cost,' highlighting their expertise. Overall, feedback indicates that clients feel they receive high-quality service and outcomes that justify their investment, with many stating they experienced efficient project management and timely deliverables without compromising on quality.
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More responsive than most other service providers

Hristov Development is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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United States (6) Switzerland (1)

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StudioKrew

4.7 3 reviews

$5,000+

$25 - $49 / hr

50 - 249

Chicago, IL

Services provided

10% API Development

20% Mobile App Development

15% AR/VR Development +5 services

15% Custom Software Development

10% IoT Development

10% Other Application Development

10% UX/UI Design

10% Web Development

StudioKrew is a development company specializing in creating digital solutions across various platforms, including mobile apps, ERP systems, and websites. Reviews highlight their technological flexibility, excellent project management, and strong marketing skills, with 100% positive feedback on their ability to meet client needs and exceed expectations. Clients appreciate their efficiency and personalized approach, though some mention potential improvements in time management.

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Reviews mention Unique expertise
Clients consistently highlight Studio Krew's unique expertise in developing tailored products across diverse industries. One client noted their capability to transform wireframes into a full-fledged product, emphasizing their marketing acumen that led to rapid user acquisition. Their flexibility in team composition and communication was praised, with one client stating, "They just handled it" with minimal guidance. Overall, the sentiment reflects strong satisfaction with Studio Krew's specialized skills and adaptability, making them a valuable partner for complex projects.

Product Development & Marketing for Sports Startup

4.5 Feb 26, 2019

Their marketing skills were fantastic. They did a great job considering that they were promoting a product in an unfamiliar market. I didn’t have to guide them much beyond a few meetings either; they just handled it.
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Industry Experience

StudioKrew has demonstrated expertise across diverse industries including Business Services, IT Services, and Arts & Entertainment. Clients commend their exceptional communication, project management, and marketing capabilities, particularly in developing tailored software solutions and mobile applications. Overall, feedback reflects a positive sentiment, highlighting their flexibility, responsiveness, and ability to deliver impactful results, making them a strong candidate for businesses seeking digital development support in these sectors.
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Business services IT Services Arts, entertainment & music

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Average Project Cost Breakdown

$50,000 to $199,999 (2) Less than $10,000 (1)

What Clients Have Said
Overall, clients expressed satisfaction with Studio Krew's cost and value for money. One CTO noted an investment of approximately $100,900, highlighting that the team consistently exceeded expectations while staying within budget. Another client, a COO, spent around $80,000–$90,000 and praised the efficiency and effectiveness of the delivered product. A comedian reported a modest investment of $786, emphasizing high satisfaction with the final outcome. Clients generally felt that the quality of work justified the costs incurred.
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India (2) Canada (1)

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Hawkdive Media

Not yet reviewed

Undisclosed

$50 - $99 / hr

2 - 9

Naperville, IL

Services provided

30% API Development

15% E-Commerce Development

15% Low/No Code Development +5 services

10% Search Engine Optimization

10% Web Design

10% Web Development

5% CRM Consulting and SI

5% DevOps Managed Services

Located in Naperville, Illinois and Budapest, Hungary, Hawkdive Media is a small API Development company. Their services include API Development and Web Development.
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Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 Hristov Development

2 LOGICON, LLC

3 StudioKrew

4 TwinCore

5 Profusion Systems

6 JAM-IT BPM Consultants

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 6 Chicago API Development Services

Hristov Development

$5,000+

$25 - $49 / hr

10 - 49

Chicago, IL

Ability to deliver

32.5/40.0

16.4/20 Reviews

9.8/10 Clients & Experience

6.3/10 Market Presence

Service focus

10% API Development

90% Other

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LOGICON, LLC

$25,000+

$100 - $149 / hr

10 - 49

Oakbrook Terrace, IL

Ability to deliver

31.8/40.0

16.6/20 Reviews

10/10 Clients & Experience

5.2/10 Market Presence

Service focus

15% API Development

85% Other

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StudioKrew

$5,000+

$25 - $49 / hr

50 - 249

Chicago, IL

Ability to deliver

28/40.0

15.2/20 Reviews

6.7/10 Clients & Experience

6.2/10 Market Presence

Service focus

10% API Development

90% Other

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TwinCore

$25,000+

$25 - $49 / hr

10 - 49

Chicago, IL

Ability to deliver

27.8/40.0

16.6/20 Reviews

6.3/10 Clients & Experience

4.9/10 Market Presence

Service focus

10% API Development

90% Other

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Profusion Systems

$5,000+

$25 - $49 / hr

10 - 49

Downers Grove, IL

Ability to deliver

21.9/40.0

17/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

10% API Development

90% Other

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JAM-IT BPM Consultants

$50,000+

$300+ / hr

2 - 9

Evanston, IL

Ability to deliver

21.5/40.0

13.8/20 Reviews

3.7/10 Clients & Experience

4/10 Market Presence

Service focus

10% API Development

90% Other

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uFlow Decision Engine

$5,000+

Undisclosed

10 - 49

Chicago, IL

Ability to deliver

5.2/40.0

0/20 Reviews

0/10 Clients & Experience

5.2/10 Market Presence

Service focus

20% API Development

80% Other

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Scalesology

Undisclosed

$150 - $199 / hr

10 - 49

Chicago, IL

Ability to deliver

5.5/40.0

0/20 Reviews

0/10 Clients & Experience

5.5/10 Market Presence

Service focus

15% API Development

85% Other

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Adtitude Digital

$10,000+

$25 - $49 / hr

2 - 9

Glenview, IL

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

25% API Development

75% Other

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Pixelum

$25,000+

$50 - $99 / hr

10 - 49

Chicago, IL

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

20% API Development

80% Other

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Webkrafterz

$1,000+

$25 - $49 / hr

10 - 49

Skokie, IL

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

10% API Development

90% Other

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Kleinschmidt Inc.

$1,000+

Undisclosed

50 - 249

Deerfield, IL

Ability to deliver

21.5/40.0

16.4/20 Reviews

0/10 Clients & Experience

5.2/10 Market Presence

Service focus

20% API Development

80% Other

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Chicago Web

$5,000+

$100 - $149 / hr

2 - 9

Chicago, IL

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

10% API Development

90% Other

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Adminix

$1,000+

$50 - $99 / hr

2 - 9

Chicago, IL

Ability to deliver

4.9/40.0

0/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

25% API Development

75% Other

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Basis Technologies

Undisclosed

Undisclosed

250 - 999

Chicago, IL

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% API Development

90% Other

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Kokomo24/7®

Undisclosed

$200 - $300 / hr

50 - 249

Northbrook, IL

Ability to deliver

5.5/40.0

0/20 Reviews

0/10 Clients & Experience

5.5/10 Market Presence

Service focus

10% API Development

90% Other

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Crispy Software Solutions

$5,000+

$50 - $99 / hr

2 - 9

Dyer, IN

Ability to deliver

22.9/40.0

15.8/20 Reviews

1.4/10 Clients & Experience

5.6/10 Market Presence

Service focus

25% API Development

75% Other

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Policy Claim Management International (PCMI)

Undisclosed

Undisclosed

50 - 249

Park Ridge, IL

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% API Development

90% Other

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Placematic USA LLC

Undisclosed

$25 - $49 / hr

2 - 9

Rolling Meadows, IL

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

20% API Development

80% Other

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Hawkdive Media

Undisclosed

$50 - $99 / hr

2 - 9

Naperville, IL

Ability to deliver

4.9/40.0

0/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

30% API Development

70% Other

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AptlyLabs Inc

$10,000+

$25 - $49 / hr

10 - 49

South Barrington, IL

Ability to deliver

4.9/40.0

0/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

20% API Development

80% Other

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