CASO

Agency & Consultancy

Callstack vs SoftServe

Structured technology and market comparison · 2026

Direct Feature Comparison

Callstack · vs · SoftServe
Market Cluster / Sector
CallstackAgency & Consultancy
SoftServeAgency & Consultancy
Platform Focus
Callstack

Enterprise React Native engineering and AI delivery services.

SoftServe

Enterprise digital engineering and consulting services provider.

Company Size
Callstack201–500 employees
SoftServe>5,000 employees
Headquarters
CallstackPL
SoftServeUS
Year Founded
Callstack2016
SoftServe1993

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Comparison Analysis

What is the main difference between Callstack and SoftServe?

When comparing Callstack and SoftServe, both platforms operate within the Large Language Models (LLM) & AI, Web/App Development & UX Design, and Agency & Consultancy ecosystem. Callstack is positioned as Enterprise React Native engineering and AI delivery services, whereas SoftServe focuses on Enterprise digital engineering and consulting services provider. Decision-makers evaluate both solutions when orchestrating their commercial monetization and technology stack.

What are the top alternatives to Callstack and SoftServe?

When evaluating Callstack and SoftServe, enterprise buyers also consider other platforms in Large Language Models (LLM) & AI, Web/App Development & UX Design, and Agency & Consultancy. You can discover the full competitive landscape and evaluate other alternatives by viewing their respective footprint profiles on Polaris7.

How do the corporate scale, structure, and headquarters of Callstack and SoftServe compare?

Callstack is headquartered in PL (founded in 2016) with 201–500 employees. SoftServe is based in US (founded in 1993) with >5,000 employees. Complete ownership, subsidiary trees, and corporate affiliations are documented across Polaris7.

Market Signals

Recent Market Signals & Activity: Callstack vs SoftServe

Documented market movements, strategic partnerships, product releases, and regulatory developments mapped across Polaris7.

CA

Callstack

Recent Signals

  • ·Callstack

    Apex Is Now Generally Available: Agentic Coding Model for Mobile and Web, Specialized in React

    Apex is now publicly available. Built by Callstack, it brings React Native expertise to feature development, code reviews, debugging, and testing, with strong performance on Next.js tasks too.

  • ·Trending TopicsInfrastructure

    Callstack Acquires Margelo for Over $20M

    Polish software company Callstack is acquiring Vienna-based engineering firm Margelo in a deal valuing the latter at more than €20 million. Both companies specialize in React Native, a cross-platform framework for building mobile apps. Margelo is known for its open-source libraries (VisionCamera, react-native-mmkv, Nitro Modules) and contract development for clients like Discord, Coinbase, and Expensify. Callstack, founded in 2016, employs over 200 people and serves enterprise clients. The acquisition aims to expand Callstack's technology portfolio and support international growth. Founder Marc Rousavy will stay on and retain a significant stake. The deal follows a recent growth investment from Viking Global Investors that valued Callstack at around €120 million.

    • Callstack is acquiring Margelo for a valuation exceeding €20 million.
    • Margelo is known for open-source React Native libraries with over 420 million total npm downloads.
    • Marc Rousavy will remain with the combined company as a significant shareholder.
  • ·Trending TopicsM&A

    Polish Callstack Acquires Vienna-Based React Native Firm Margelo

    Polish software consultancy Callstack has acquired Vienna-based engineering firm Margelo in a transaction valuing Margelo at more than €20 million. Margelo is known for open-source React Native libraries such as Nitro Modules, VisionCamera, and react-native-mmkv, and lists Discord, Coinbase, Expensify, and VSCO as clients. Callstack, founded in 2016 in Wrocław, employs more than 200 people and serves over 100 enterprise customers. Margelo founder Marc Rousavy will remain on board and continue developing the libraries. The companies say AI is shifting software development toward architecture, performance, and secure releases. Callstack previously received a growth investment from Viking Global Investors in summer 2025, which valued the company at roughly €120 million. No closing date or regulatory approval details were disclosed.

    • Callstack is acquiring Margelo, valuing the Vienna-based firm at over €20 million.
    • Margelo's open-source libraries include Nitro Modules, VisionCamera, and react-native-mmkv.
    • Margelo has about 39 senior developers and lists Discord, Coinbase, Expensify, and VSCO as clients.
SO

SoftServe

Recent Signals

  • ·SoftServe

    SoftServe Appoints Andriy Stytsyuk as Chief Executive Officer

    SoftServe announces appointment of Andriy Stytsyuk as CEO, effective immediately. Also, the company acquires NewVision Software, adds India-based expertise, and establishes local presence in Saudi Arabia.

  • ·https://martechseries.com/feed/AI

    SoftServe Launches Saudi Arabia Entity for AI Innovation

    SoftServe, an AI and technology services company, announced the official launch of a new entity in Saudi Arabia, operating from Riyadh. This expansion marks a significant milestone in its commitment to the Middle East region and increases its global presence to 54 offices in 17 countries. The company aims to bring enterprise-grade AI capabilities and digital transformation expertise to regional organizations, offering onsite responsiveness and localized solutions. The expansion aligns with Saudi Vision 2030, with SoftServe committing to cultivate local talent and support sovereign AI development. This follows SoftServe's acquisition of India-based NewVision Software, marking its first formal expansion into the Middle East market.

    • SoftServe officially launched a new entity in Saudi Arabia, based in Riyadh.
    • The expansion brings SoftServe's global presence to 54 offices in 17 countries.
    • The entity aims to deliver enterprise-grade AI and digital transformation services to Saudi organizations.
  • ·Retail-NewsE-Commerce / AI

    EHI Study: Agentic Commerce Becomes Strategic Retail Priority

    According to an EHI study commissioned by Softserve, agentic commerce is evolving into a strategic topic for the retail sector. The study reveals that approximately 60% of retail companies are engaging with AI systems that autonomously execute or control purchasing or trading processes. Over 11% already use concrete applications, while 40% currently see no use case in their own business. Key challenges include data quality and a lack of skilled personnel, with only 39.2% rating their data as good and only about 20% feeling adequately staffed. Investments are expected to increase significantly over the next five to ten years. The study also highlights that online retail is expected to be most affected, with 85.8% of participants anticipating a strong impact within five years.

    • Around 60% of retail companies are dealing with AI systems for autonomous commerce processes.
    • Over 11% of companies already use concrete agentic commerce applications.
    • 40% of surveyed companies see no current use of agentic commerce in their business.

Compare their exact ecosystem overlaps.

Explore all deep relationships in Polaris7. Discover exactly which mutual clients, integrated technologies, and overlapping partners Callstack and SoftServe share across the market ecosystem.