Featured partner
AI development shop with offices in Orange County, CA and Prishtina, Kosovo building custom AI-powered products and offering staff augmentation and fractional CTO services for companies that need hands-on AI engineering.
Specialty
Custom AI Development Companies
Custom AI development means a shop builds a system around your data and workflow instead of configuring an off-the-shelf tool. The firms listed here range from boutiques like Addepto (Warsaw) and Virtual Arc (Belgrade) to large engineering companies like N-iX, SoftServe and LeewayHertz. Some lead with generative AI and agents, others with data engineering or MLOps underneath the model work. Before you shortlist, ask each one for a past project close to your problem, who would be on your team, and who owns the code and the trained artifacts when the engagement ends. Compare engagement models too: Master of Code Global and BairesDev, for example, list project-based, staff augmentation and dedicated-team options.
30 of the 58 AI development shops and AI developers for hire tracked on AI Dev Shops publish Custom AI Development as a specialty, as of October 14, 2026. The featured partner, asaasin.ai, is pinned first when it qualifies; every other row is alphabetical, unpaid, and drawn from public information.
Filter by specialty to see which shops say they build the kind of AI system you need.
Which AI development shops and AI developers for hire do custom ai development?
Advertiser disclosureFeatured partner pinned first and labelled; every other company is listed alphabetically. No paid placement.
| Company | Headquarters | Specialties | Size | Best for | Website |
|---|---|---|---|---|---|
|
asaasin.ai
Featured partner
|
Orange County, CA · Prishtina, Kosovo | Boutique | Custom AI Development | Visit | |
|
Accel DNA
North America, Remote/Global
|
New York, USA | Boutique | AI Agents | Visit | |
|
Addepto
Europe, Remote/Global
|
Warsaw, Poland | Boutique | Custom AI Development | Visit | |
|
BairesDev
North America, Latin America
|
San Francisco, USA | Large | Full-Stack Development | Visit | |
|
Buenos Bytes
Latin America, North America
|
Buenos Aires, Argentina | Boutique | Custom AI Development | Visit | |
|
DevSmartX
Middle East, Remote/Global
|
Cairo, Egypt | Mid-size | AI Agents | Visit | |
|
Duotach
Latin America, North America
|
Buenos Aires, Argentina | Boutique | AI Agents | Visit | |
|
Ekotek
Asia
|
Hanoi, Vietnam | — | Custom AI Development | Visit | |
|
EnactOn Technologies
Asia, Remote/Global
|
Surat, India | Mid-size | AI Agents | Visit | |
|
Grid Dynamics
North America, Europe
|
San Ramon, USA | Large | Data Engineering | Visit | |
|
Innowise
Europe, Remote/Global
|
Warsaw, Poland | Large | Custom AI Development | Visit | |
|
Intellectsoft
North America, Europe
|
New York, USA | Mid-size | Mobile AI Apps | Visit | |
|
ISHIR
North America, Middle East
|
Dallas, USA | Mid-size | Custom AI Development | Visit | |
|
Kizzy Consulting
Asia, Remote/Global
|
Panchkula, India | — | AI Agents | Visit | |
|
Leanware
Latin America, North America
|
Bogotá, Colombia | Boutique | AI Agents | Visit | |
|
LeewayHertz
Asia, North America
|
Gurugram, India | Large | Custom AI Development | Visit | |
|
MALI Labs
Balkans, Europe
|
Ada, Vojvodina, Serbia | Boutique | LLM Development | Visit | |
|
Master of Code Global
North America, Europe
|
Redwood City, USA | Mid-size | Custom AI Development | Visit | |
|
N-iX
Europe, North America
|
Valletta, Malta | Large | Custom AI Development | Visit | |
|
Neoteric
Europe, North America
|
Gdansk, Poland | Boutique | Generative AI | Visit | |
|
Nextsoft Corp
Latin America, Remote/Global
|
Colombia | Boutique | LLM Development | Visit | |
|
ProductDock AG
Europe, Balkans
|
Berlin, Germany | Mid-size | Custom AI Development | Visit | |
|
SCAND
Europe, Remote/Global
|
Minsk, Belarus | Large | Mobile AI Apps | Visit | |
|
SoftServe
North America, Europe
|
Austin, USA | Large | Custom AI Development | Visit | |
|
Southworks
Latin America, North America
|
Buenos Aires, Argentina | Mid-size | AI Agents | Visit | |
|
Symph
Asia, Remote/Global
|
Philippines | Mid-size | AI Agents | Visit | |
|
Vebtual
Middle East, North America
|
Dhahran, Saudi Arabia | — | AI Agents | Visit | |
|
Virtual Arc
Europe, Balkans
|
Belgrade, Serbia | Boutique | AI Agents | Visit | |
|
Wizeline
North America, Latin America
|
San Francisco, USA | Large | AI Agents | Visit | |
|
Wunderwerk AI
Europe, Remote/Global
|
Aachen, Germany | Boutique | Custom AI Development | Visit |
Showing 10 of 30 companies
All 30 listed
30 shownAccel DNA is a New York-based data, analytics, and AI agency offering 'Agentic AI Pods' — a dedicated PM plus AI developers who scope, build, and iterate custom AI agents (workflow automation, CRM follow-ups, data parsing) alongside agent-stack consulting for startups and enterprise ops teams.
Addepto is a boutique AI and data consultancy based in Warsaw, Poland, founded in 2018. It offers generative AI and LLM development, computer vision, AI agent and chatbot creation, MLOps and data engineering. Its listed industries are aviation, manufacturing, finance and healthcare. Engagements run as project-based work or with a dedicated team.
BairesDev is a nearshore software development and staff augmentation company, headquartered in San Francisco and founded in 2009, that assembles dedicated engineering teams for front-end, back-end, mobile, and AI/machine learning projects, drawing primarily on Latin American engineering talent. It lists three engagement models: staff augmentation, dedicated team, and project-based. Its specialties here are custom AI development, AI app development, MVP development, and full-stack work. As a large firm, it suits buyers who want a bench and parallel workstreams; the question to settle in scoping is who exactly staffs your team and how continuity is handled. Time zones line up well with North American teams because of the Latin American delivery base.
Buenos Bytes is a boutique Buenos Aires firm that supplies AI-native developers from Latin America to US startups. Its work covers custom AI and ML development, LLM integration, data pipelines and AI consulting. Listed engagement models are project-based, dedicated team and consulting. Argentina's overlap with US working hours makes it a practical nearshore choice for early-stage teams.
DevSmartX is a Cairo-based AI and software systems engineering firm building autonomous AI agents, real-time computer vision systems, predictive ML pipelines, and NLP solutions for enterprise clients across Egypt, the GCC, and Europe, following a fixed six-step delivery methodology.
Duotach is a boutique software engineering and automation consultancy in Buenos Aires, Argentina. Its services include Claude Code agent development, N8N workflow automation, WhatsApp and AI chatbots, and custom web and mobile software. It also offers AI consulting for nearshore clients in North America and Latin America. The site lists it as a brand of Sysentify LLC.
Ekotek is a Vietnam-based, ISO 27001/9001-certified software engineering company building AI-native enterprise solutions: generative AI integration, AI automation engineering, and AI/data platforms, alongside custom software, web, and mobile development. It has offices in Hanoi, Da Nang, Tokyo, and Singapore. Its listed specialties are custom AI development, generative AI, AI software development, and data engineering. Buyers in Asia-Pacific get regional overlap; buyers elsewhere should plan for the time-zone gap and ask how handoffs are run.
EnactOn Technologies is a Surat, India-based mid-size software company building autonomous single-task and multi-agent AI systems (LangChain/CrewAI-based) alongside mobile, web, and full-stack development. According to its AI agent development page, it uses an in-house (never subcontracted) team and agrees the fixed build price upfront, separate from ongoing running costs. Its engagement model is project-based, and its listed specialties are AI agents, custom AI development, full-stack development, and MVP development. Ask for the scope boundary between the build and the running costs in writing.
Grid Dynamics is a publicly traded (Nasdaq: GDYN) technology engineering firm, founded in 2006 and based in San Ramon, California. It provides AI, data and analytics, cloud, and digital engagement services to Fortune 1000 enterprises, including a proprietary agentic-commerce AI platform. Its listed specialties are data engineering, custom AI development, and AI agents. It is a large firm with offices across North America and Europe, so it fits enterprise buyers with several workstreams; smaller teams should confirm that a project of their size gets senior attention.
Innowise is a full-cycle software development company offering AI and machine learning solutions through a dedicated AI hub, alongside custom web, mobile, cloud, and enterprise software development and IT staff augmentation.
Intellectsoft is a New York-headquartered custom software and AI engineering company founded in 2007, offering AI software development, AI agent development, and AI staff augmentation alongside mobile app development for enterprise clients, with additional offices across the US, UK, and Eastern Europe.
ISHIR is a digital product innovation studio offering AI-native custom software development, generative AI and AI agent development, data and analytics services, and staff augmentation, with offices spanning Texas, Dubai/Abu Dhabi, New Delhi, and Singapore.
Kizzy Consulting is a Salesforce and AI consulting partner offering 'AI Pod' engagements — dedicated fixed-scope teams (AI architect, engineers, prompt/evals specialist) that design, build, and deploy production AI agents such as document analysis, knowledge-base RAG, and voice agents for healthcare, retail, and real estate clients, billed via fixed-bid or hourly pricing.
Leanware is a Bogotá-based AI engineering company offering managed custom AI agents, AI product engineering on testable milestones, AI readiness assessments, and dedicated AI-fluent engineering teams for US-aligned startups and businesses, including an AI fitness mobile app built from concept to launch.
LeewayHertz is a large Gurugram, India-headquartered firm building generative AI platforms, LLM applications, AI agents and custom software for enterprise clients. It adds data engineering and industry-specific AI work for finance, healthcare and manufacturing. Its regions served include Asia and North America. Scale and sector breadth make it a fit for enterprise programs rather than small prototypes.
MALI Labs is a boutique software and AI development company based in Ada, Vojvodina, in northern Serbia. It builds custom web applications, LLM and NLP solutions, intelligent automation and systems integrations. Clients are mainly in Serbia, Hungary and the wider EU. The company advertises a free one-week proof of concept, which gives buyers a low-commitment way to test the team.
Master of Code Global is a mid-size firm founded in 2004 and based in the San Francisco Bay Area, with offices across North America and Europe. It develops conversational AI, generative AI and AI agent solutions on platforms such as OpenAI, Google Cloud and AWS. Custom software and mobile app development round out the offer. Engagement models include project-based work, staff augmentation and dedicated teams.
N-iX is a global software engineering company offering AI consulting, AI agent development, cloud, data platform engineering, and legacy modernization services, with an AI implementation approach it calls 'pragmatic AI software engineering.'
Neoteric is a Polish software studio building AI and generative AI-powered digital products end to end, from product strategy and design through development and scaling, for fitness, edtech, and energy sector clients.
Nextsoft Corp is a Colombia-based boutique software company building enterprise systems, legacy modernization, and applied AI: chatbots, process automation, and LLM integration with ChatGPT or Claude on clients' own data. It delivers through custom development engagements (project-based) or embedded staff augmentation teams across Latin America. Its listed specialties are LLM development, full-stack development, and custom AI development. A fit for North American buyers who want Latin American time-zone overlap; as with any boutique, ask who is on your team and what happens if they leave.
ProductDock AG is a nearshore software development provider, a subsidiary of codecentric AG, headquartered in Berlin with engineering hubs in Novi Sad (Serbia) and Banja Luka and Doboj (Bosnia-Herzegovina). It offers AI, cloud, software modernization, and product development services with a 120+ person team, and was founded in 2021. Listed here as a mid-size shop in Europe and the Balkans, its specialties are custom AI development, full-stack development, and MVP development. For European buyers the appeal is overlap with Central European working hours; ask where the senior engineers sit on your project and whether the AI work is staffed from the Balkan hubs or Berlin.
SCAND is a Minsk, Belarus-based software development company with 25+ years of experience and 250+ engineers, building AI-powered mobile apps (iOS, Android, cross-platform) alongside custom software, web development, and IT staff augmentation for clients including NASA, IBM, Cisco, and FedEx.
SoftServe is a digital engineering company designing and building data, cloud, AI/ML, robotics, IoT, and extended-reality solutions for enterprise clients, with generative and agentic AI among its core service areas.
Southworks is a software engineering firm building AI copilots and intelligent agents alongside cloud migration and modernization work for enterprise clients, operating engineering teams across Argentina, Latin America, North America, and Europe.
Symph is a Philippines-based AI software development agency with 16 years of engineering experience, building custom AI agents, AI applications, and web/mobile business systems for clients including government agencies and SMEs, delivered on a project basis.
Vebtual is an AI development company with an office in Dhahran, Saudi Arabia, serving Saudi and wider GCC enterprises. Its work spans AI agents, automation, document intelligence, generative AI and Arabic and bilingual chatbots. It lists Azure-based in-Kingdom data residency options. Arabic-language capability and local hosting are the main reasons to shortlist it.
Virtual Arc is a Belgrade-based boutique studio building production agentic AI systems with retrieval-augmented generation and multi-provider LLM orchestration, alongside custom business software such as ERPs and B2B portals for clients across Serbia, the EU, and the US. Its listed specialties are AI agents, custom AI development, and full-stack development. Being in the Balkans, it overlaps with European working hours. As a boutique, expect senior people close to the work, and ask about key-person coverage.
Wizeline runs 'Agentic Pods' — cross-functional engineering pods pairing senior engineers with embedded AI agents to accelerate software delivery (QA, documentation, CI/CD, incident triage) under outcome-based pricing, delivered from offices across North America, Latin America, Europe, and Vietnam.
Wunderwerk AI Labs GmbH is a small, EU-based (Aachen, Germany) software studio building bespoke custom AI systems, native and cross-platform mobile apps, and web applications, with client data kept on European infrastructure.
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Questions buyers ask
How many AI development shops and AI developers for hire do Custom AI Development?
30 of the 58 companies in this directory. The list is compiled from public information and refreshed as companies change.
How is this list ordered?
The featured partner, asaasin.ai, which publishes this directory, is pinned first and labelled. Everyone else is alphabetical. Position is not for sale.
Do companies pay to appear on this page?
No. Inclusion is free and unpaid. asaasin.ai is the only company with a commercial relationship to this site, and it is disclosed on every page.