App Development Company

Grossum

Outsourced web and mobile development company building SaaS, high-load systems and MVPs

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TrustList summary

Grossum is an outsourcing company for web and mobile development and part of the App Solutions development group. It has worked on high-load and scalable projects and on secure SaaS products, and it covers the full product life cycle from architecture to operations.

Services

Web development: custom web applications, including PHP and Symfony work.
Mobile development: mobile apps, mobile sites and responsive websites.
Full-cycle product development: architecture, development and QA for MVPs and larger business systems.
DevOps support: round-the-clock DevOps for live products.
Market and promotion planning: market study, data analysis and a marketing plan for a new product.

Customers and markets

Grossum builds apps for founders and businesses; one named client project is the Authenpic app, for which it also helped with launch.

Key facts

Group: part of App Solutions
Focus: outsourced web and mobile development

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

Grossum rankings

Grossum is ranked on 3 TrustList rankings: #2 on 1, #4 on 1 and #8 on 1.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. Grossum has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

App development company · 3 rankings

#2of 91
Outsourcing
It is one of 2 here listing search engine optimization and symfony.
Its profile: “Grossum is an outsourcing company for web and mobile development and part of the App Solutions development group.”
Of the top 83 here, 31 also cover android and 29 also cover eCommerce; 5 also work in Ahmedabad and 2 also work in Delhi NCR.
Behind CROWNSTACK, ahead of LetsNurture.
#4of 173
Responsive
It is one of 2 here listing DevOps and IT outsourcing.
Its profile: “- Mobile development: mobile apps, mobile sites and responsive websites.”
Of the top 94 here, 33 also cover SEO and 32 also cover creative; 4 also work in Jaipur and 3 also work in Dubai.
Behind Evolbit, ahead of KeyToTech.
#8of 790
Marketing
It is one of 2 here listing outsourcing and one of 4 here listing SaaS.
Its profile: “- Market and promotion planning: market study, data analysis and a marketing plan for a new product.”
Of the top 94 here, 43 also cover web development and 32 also cover mobile app development; 3 also work in Chandigarh & Mohali and 3 also work in London.
Behind GrayCell Technologies, ahead of eStore Seller.