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App Development Company

BLACTAIL

Delhi software company building native and cross-platform mobile apps for startups and enterprises

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About BLACTAIL

BLACTAIL is an Indian software development company based in Delhi, previously trading as Excel System. It builds native and cross-platform mobile applications and takes on the whole app development process for its clients. It works with startups and larger enterprises in India and abroad.

What BLACTAIL offers

Mobile app development — native and cross-platform Android and iOS apps built to a client's requirements.
UI and UX design — interface and user experience design for mobile products.
Technology consulting — advice on technology choices for businesses across several sectors.
Launch support — help taking an app through to release, including App Store submission.
Corporate wellness programmes — a separate line of work on mental health programmes for companies.

Who it works with

The firm serves startups and enterprises, with projects in fintech, edtech, foodtech and healthtech. Project discussions take place after an NDA is signed.

Key facts

Based in: Delhi, India
Former name: Excel System
Platforms: Android and iOS

Profile written by TrustList from the business's own published information, Sep 2026.

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