21Twelve Interactive

Brooklyn, New York, United States
Verified

Development and dev services for inbound lead capture and search visibility

21Twelve Interactive is a Brooklyn-based digital agency specializing in custom software development for businesses ranging from startups to established enterprises. Founded in 2020, the company positions itself as a partner for organizations seeking tailored digital products, with a focus on mobile app development, web and CMS platforms, and eCommerce solutions. The agency emphasizes user-centric design and modern technology, aiming to deliver seamless online experiences that align with client goals.

Service offerings at 21Twelve Interactive include mobile app development for iOS and Android, web and CMS development, eCommerce site creation, JavaScript development, game development, and digital marketing. The team follows an agile development process, beginning with detailed requirement gathering and client collaboration to ensure clarity on project scope and features. Insights from their site highlight expertise in navigating the iOS app development landscape, selecting appropriate frameworks, and prioritizing performance and user experience. This process-driven approach allows the team to adapt to varied project requirements and deliver intuitive, high-quality digital products. Engagements often emphasize clear goals, documented workflows, and reporting that ties activity to outcomes across web, search, and social channels. Projects often start with discovery and channel audits to map current performance before setting priorities.

Typical deliverables from the team include custom mobile applications, responsive websites, robust eCommerce platforms, and interactive games. By combining technical proficiency with a commitment to understanding client needs, the team delivers digital solutions that address both business objectives and user expectations. Typical deliverables include measurement frameworks, audits, roadmaps, and campaign briefs.

6
YEARS IN BUSINESS
4
SERVICES

Capabilities

Services

What these services involve

Android Development
Android Development for mobile app development buyers. Clear scope, measurable outcomes, and reliable delivery.
Cross Platform Apps
Cross Platform Apps for mobile app development buyers. Clear scope, measurable outcomes, and reliable delivery.
iOS Development
iOS Development for mobile app development buyers. Clear scope, measurable outcomes, and reliable delivery.
Mobile CI CD
Mobile CI CD for mobile app development buyers. Clear scope, measurable outcomes, and reliable delivery.

Agency details

Team size
11-50 people
Founded
2020 (6 years)

About this agency on Agency List

21Twelve Interactive holds an Agency List Score of 64 out of 100.

That score is higher than 13% of the 36,919 agencies Agency List has assessed so far.

The Agency List Score measures how well an agency documents its work in public: named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than to the client.

It does not measure client satisfaction, price, or availability.

How the Agency List Score is measured

Assessment date

Agency List assessed 21Twelve Interactive in August 2026, reading 4 pages published on 21twelveinteractive.com.

The score reflects what 21Twelve Interactive had published by that date; anything published since has not been read.

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