B2B Company Directory

Top API Development Companies

A high performing API infrastructure is the backbone of your digital operations. From REST and GraphQL design and third party integrations to API security and documentation and testing, the right development partner turns ideas into scalable products. 10Firms streamlines your search by collecting in depth, verified reviews and performance data... Read More

11+ Companies Listed API Development Packages
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Best API Development Agencies

11+ Companies
01 ISBX Corp logo

ISBX Corp

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Quick Facts
$25,000+ $150 - $199 / hr 11-50 Los Angeles, CA
Services Provided
10% Web Development
10% AI Development
10% Custom Software Development
+7 more services
10% Mobile App Development
10% E-Commerce Development
10% Enterprise App Moderni...
10% UX/UI Design
10% AI Consulting
10% API Development
10% Application Management...
About

ISBX (Interactive, Strategy, Branding, Execution) is the leading web and mobile application development agency in Southern California and has extensive experience in a diversified range...

02 SapientPro logo

SapientPro

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Quick Facts
$5,000+ $25 - $49 / hr 11-50 Luzern, Switzerland
Services Provided
20% Web Development
10% AI Development
20% Custom Software Development
+4 more services
10% Mobile App Development
20% UX/UI Design
10% API Development
10% Blockchain
About

SapientPro is a software development company that builds cutting-edge products and provides consulting services for SMEs and enterprises since 2016. We don’t sell hours. We...

03 Shunyavkash logo

Shunyavkash

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Quick Facts
$25,000+ $25 - $49 / hr 1-10 Surat, India
Services Provided
50% Web Development
10% Mobile App Development
10% Low/No Code Development
+2 more services
20% API Development
10% CRM Consulting and SI
About

Shunyavkash supports businesses as a technical growth partner, helping them build and scale digital solutions. The team focuses on delivering forward thinking technology that aligns...

04 Cleveroad logo

Cleveroad

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Quick Facts
$10,000+ $25 - $49 / hr 200-500 New York, NY
Services Provided
28% Web Development
10% AI Development
30% Custom Software Development
+6 more services
10% Mobile App Development
5% Generative AI
5% IT Staff Augmentation
1% AI Consulting
1% API Development
5% IoT Development
About

Cleveroad builds complex and business-driven digital solutions with a focus on transparency & reliable delivery. The team develops web and mobile applications, cloud and microservices...

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API Development FAQs

Looking for a API Development company but not sure where to start? We've put together answers to the most common questions businesses ask when searching for a trusted partner.

How do I choose the right API development company for my project?
Start by defining your project scope, budget, and timeline. Look at each firm's portfolio for relevant industry experience, check verified client reviews on 10Firms for reliability and communication, and confirm they have the tech stack your project requires.
How much does it cost to hire a API development company?
Costs vary widely based on project complexity, the firm's location, and team seniority. Typical engagements range from $5,000 to $50,000, depending on scope and the firm's experience level. Use 10Firms filters to compare firms within your budget range.
What is the difference between a API development agency and a freelancer?
Agencies typically offer a full team of developers, QA engineers, project managers, and solution architects, with more structured processes, making them better suited for complex or long term projects. Freelancers can be more cost effective for smaller, well defined tasks but often have limited capacity.
How long does it take to build and launch a new application?
Most projects take 4 to 12 weeks to complete, though larger or more complex engagements can extend to several months.
Do API development companies also handle ongoing support after the project is delivered?
Most firms listed on 10Firms offer post launch support packages covering bug fixes, performance monitoring, and feature enhancements. Check each firm's profile to confirm terms and pricing.
What should I look for in a API development company's portfolio?
Look for evidence of clean, scalable code and successful production deployments, and where available, measurable outcomes like faster load times or increased user adoption delivered for past clients.
Can these companies help with related services beyond API development?
Many firms on 10Firms offer end to end services covering UX/UI design, quality assurance, and DevOps support alongside core development. If you need a specialist for just one phase, check each firm's service listing to confirm.