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Custom B2B digital products, built AI-native.

Notch is an AI engineering partner. We build agentic solutions, custom AI models, and software-based digital products with AI embedded across every team and every stage of delivery - not bolted on at the end. 

Our services: AI-native software development, AI consulting, greenfield projects, app modernization, team extension, design, discovery, and business process consulting.

Domain expertise: Finance, telecom, government, construction, pharma, and IT. 

  • Min project size
    $50,000+
  • Hourly rate
    $50 - $99 / hr
  • Employees
    50 - 249
  • Locations
    Zagreb, Croatia
  • Year founded
    Founded 2014
  • Languages
  • Timezones

3 Languages that we service

  • English
  • German
  • Croatian

6 Timezones that we service

CET
Central European Time (CET)
CST
Central Standard Time (CST)
EST
Eastern Standard Time (EST)
EET
Eastern European Time (EET)
GMT
Greenwich Mean Time (GMT)
UTC
Universal Coordinated Time (UTC)

2 Locations

  • Zagreb , Croatia
  • Split , Croatia

Select Focus Area
Application Platforms
Amazon Application Development Framework
30%
Azure Platform
30%
AI Agent Development Focus
AI Agent Frameworks
60%
AI Agent Platforms & Builders
40%
AI Agent Purpose Focus
General Purpose AI Agents
20%
Business Intelligence AI Agents
15%
Coding & Development AI Agents
15%
Customer Service AI Agents
15%
Workflow AI Agents
15%
Data Analysis AI Agents
10%
Productivity AI Agents
10%
AI Consulting Focus
AI Platform Integration Focus
Hubspot AI Integration
20%
Wix AI Integration
20%
Notion AI Integration
15%
Squarespace AI Integration
15%
Google Workspace AI Integration
10%
Gumloop AI Integration
10%
Salesforce AI Integration
10%
AI Technologies & Models
Open AI GPT-3
40%
Anthropic
20%
Cohere
15%
Deepmind Gopher
10%
Hugging Face Bloom
10%
Open AI Dall-E 2
5%
Frameworks and CMS
Spring MVC
50%
.NET
10%
Programming & Scripting
Java
30%
Go
10%
Industries
Information technology
20%
Financial services
15%
Telecommunications
15%
Government
10%
Medical
10%
Supply Chain, Logistics, and Transport
10%
Business services
5%
Energy & natural resources
5%
Other industries
5%
eCommerce
5%
Clients
Midmarket ($10M - $1B)
50%
Enterprise (>$1B)
40%
Small Business (<$10M)
10%

Pricing Snapshot

Min. project size $50,000+
Avg. hourly rate $50 - $99 /hr
Rating for cost 4.6 /5

What Clients Have Said

Notch offers competitive pricing that aligns well with client budgets. Projects typically involve teams of 2-10 employees, with successful outcomes such as enhanced UX and operational efficiency. Clients appreciate the value for cost, citing strong communication and adaptability throughout the project lifecycle.

This summary is based on verified Clutch reviews.

Most Common Project Size

$200,000 - $999,999 based on 13 reviews
< $49,999 $50,000 - $199,999 $200,000 - $999,999 > $1,000,000

Select a service to see pricing information

Notch Review Insights

Overall Review Rating

4.9
  • Quality 4.9
  • Schedule 4.9
  • Cost 4.6
  • Willing to Refer 4.9

Top Mentions

Review Highlights

  • No Significant Areas for Improvement

    Clients generally do not report notable areas for improvement, indicating a high level of satisfaction with Notch's services. Some minor suggestions for more initial planning were noted but attributed to both parties.

  • Strong Technical Expertise

    Notch is highly praised for its technical knowledge and the ability to deliver complex solutions, such as AI-driven platforms, telecom transformations, and custom software applications. Their expertise in AI, UI/UX, and software integration is consistently highlighted by clients.

  • Collaborative and Client-Focused Approach

    Notch is recognized for integrating seamlessly with client teams, showing commitment and ownership akin to internal staff. Their collaborative style and investment in client success are major factors that set them apart.

  • Successful Integration with Client Teams

    Notch successfully integrates with client teams, contributing to project success as an extension of the client's workforce. This integration is facilitated by their understanding of client systems and processes.

  • High Client Retention and Continued Engagement

    Many clients express a desire to continue working with Notch on future projects, reflecting a strong client retention rate and ongoing satisfaction with their partnership.

Notch Reviews

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Custom Software Dev for Institution-Focused IT Provider

  • Custom Software Development
  • $200,000 to $999,999
  • Jan. 2018 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"They not only do what is expected of them but also think ahead, ask difficult questions..."

Jul 19, 2020
Head of Information Systems Department, IT Provider
Anonymous
Verified
  • Other industries
  • Zagreb, Croatia
  • 51-200 Employees
  • Online Review
  • Verified

AGENCY04 buttressed the development team of a Croatian IT provider. Focusing on module deployment, they helped create a national research information system that's interconnected with various databases. 

Software Dev for R&D Company

  • Custom Software Development
  • Less than $10,000
  • Feb. 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"Their technical knowledge, flexibility, work ethic, and culture are impressive."

Jun 15, 2020
CTO, R&D Company
Anonymous
Verified
  • Information technology
  • Zagreb, Croatia
  • 51-200 Employees
  • Online Review
  • Verified

AGENCY04 is providing software development services on a verification project for an R&D company. They're responsible for development, architecture, technical product steering, and integration support.

Custom Software Dev for Educational Technology Company

  • Custom Software Development
  • $10,000 to $49,999
  • Jan. - June 2020
5.0
Quality
4.5
Schedule
5.0
Cost
3.5
Willing to Refer
5.0

"The developers from the agency are very adaptive."

Jun 12, 2020
CIO, Educational Technology Company
Anonymous
Verified
  • Education
  • Zagreb, Croatia
  • 51-200 Employees
  • Online Review
  • Verified

AGENCY04 supported the development of a content contributor platform by augmenting internal resources. This involved front-and backend development.

Conference App for Startup

  • Mobile App Development
  • $200,000 to $999,999
  • Jan. 2019 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"(We) can’t imagine a better partner in developing such a complex and powerful product."

Jun 10, 2020
VP Growth, Connected Devices
Matej Zelić
Verified
  • Other industries
  • Zagreb, Croatia
  • 1-10 Employees
  • Online Review
  • Verified

A growth startup hired AGENCY04 to assist with developing a conference mobile app for iOS and Android. It needed to match users based on mutual interest and allow organizers to act on realtime congestion data.

E-Commerce Solution for IT Services Company

  • E-Commerce Development
  • $1,000,000 to $9,999,999
  • July 2019 - July 2020
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"The flexibility of the management was much appreciated."

Jun 3, 2020
ECommerce project manager, ECLA Informatique SA
Nicolas Binnendijk
Verified
  • Information technology
  • Lausanne, Switzerland
  • 1,001-5,000 Employees
  • Online Review
  • Verified

AGENCY04 provided e-commerce development. Their team augmented the client's staff. 

Software Dev for Electrical Engineering Company

  • Custom Software Development
  • $200,000 to $999,999
  • Nov. 2017 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

“They’re eager to learn from us and solve our issues creatively.”

Jan 9, 2019
Head of Custom Software Development, Končar
Tonci Kalina
Verified
  • Manufacturing
  • Zagreb, Croatia
  • 51-200 Employees
  • Phone Interview
  • Verified

AG04 was hired to develop two software programs from scratch.

Dedicated Dev for Continuous Delivery Software Firm

  • Web Development
  • Confidential
  • Jan. 2014 - Ongoing
4.5
Quality
4.5
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

"They’re committed, knowledgeable, and capable of managing an IT team."

May 11, 2018
VP of Product Development, XebiaLabs
Andreas Prins
Verified
  • Other industries
  • Burlington, Massachusetts
  • 51-200 Employees
  • Phone Interview
  • Verified

AG04 participates in the development of complex products, including a software deployment tool. They use Angular, React, Java, and Scala to build the products’ core engines and features.

Development Staff Augmentation for Life Sciences Software Co

  • API Development IT Staff Augmentation Other Application Development
  • OPEN API
    +2
  • Confidential
  • July 2025 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

"Notch stayed engaged throughout the engagement."

Dec 17, 2025
VP Product Development, Regulatory, ArisGlobal LLC
Zeljko Bak
  • Other industries
  • Boston, Massachusetts
  • 1,001-5,000 Employees
  • Online Review

Notch has augmented the product development team of a life sciences software company. The project's goal is to accelerate the client's roadmap for their regulatory SaaS product.

API Development for Observability Company

  • API Development Custom Software Development UX/UI Design
  • REST API
  • $200,000 to $999,999
  • Jan. 2022 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They always deliver on time."

Jul 5, 2024
CEO, StackState
Andreas Prins
Verified
  • Information technology
  • Hilversum, Netherlands
  • 11-50 Employees
  • Online Review
  • Verified

Notch has been hired by an observability company to assist in developing their platform. The team's tasks have included contributing to UI building, frontend development, and integrations.

Custom Web Solution for Global Construction Tech Group

  • Web Design
  • $200,000 to $999,999
  • Oct. 2018 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"All challenges our projects faced were solved together quickly!"

Mar 26, 2021
Product Owner, Global Construction Tech Group
Anonymous
Verified
  • Other industries
  • Vienna, Austria
  • 10,001+ Employees
  • Online Review
  • Verified

Agency 04 developed a custom web solution in Java and Angular for a global construction tech group. The team created an application that aggregates and visualizes data in real-time from different ERP systems.

Showing 11-20 of 20 Reviews

Our Story

We are a team of over 170 experts based in Central Europe, united by a passion for solving complex business challenges and creating robust AI-first digital products. Here, engineers, designers, analysts, and consultants thrive together, forming strong client relationships and truly living Notch’s values every day—from courage and collaboration to human respect. That’s how we delivered over 300 projects to clients worldwide and earned recognition as a top global software and AI strategy company.

Clutch verification provides an additional layer of data to help you make the right purchasing decision of business services.

Learn More
Verified Client Reviews
19
Overall Review Rating
4.9
Source
Clutch
Last Updated
June 15, 2026

Business Entity

Business Entity Name AG04 Innovative Solutions d.o.o.
Source Republika Hrvatska Sudski Registar
Jurisdiction of Formation Croatia
Date of Formation October 2, 2014
Status Active
Last Updated July 21, 2022
ID 080934686

Credit Report Results

International Credit Risk Assessment Very Low Risk
Source Creditsafe
Last Updated January 1, 2022
Learn More About The Clutch Verification Process

Locations (2)

Ul. Republike Austrije 33 ZagrebCroatia 10000

101 - 150

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