Arkency

What Arkency does

Arkency is a private, remote-first Ruby on Rails consulting agency founded in 2006 by Andrzej Krzywda, headquartered in Wroclaw, Poland, with a distributed team of approximately 13 core members. The firm specializes in rescuing, modernizing, and scaling legacy Rails applications, with deep practice in Domain-Driven Design (DDD), CQRS, and event sourcing. Its client base spans fintech (Trezy, CHI Cargo), event platforms (Billetto), e-commerce, waste management (Anenta), and SMBs (Imker.pl) across the US, UK, Denmark, Germany, and Poland. Engagements typically involve multi-year contracts for legacy rescue, Rails version upgrades, frontend modernization (including React-to-Hotwire migration), and architecture consulting for event-driven systems.

The company's core technology stack is Ruby on Rails with event-driven architecture built atop Arkency's flagship open-source library, Rails Event Store, which has accumulated 1.5k+ GitHub stars and is actively maintained by the firm. The product portfolio extends well beyond pure services into educational products: five published books (Domain-Driven Rails, Responsible Rails, Async Remote, Frontend-Friendly Rails, Blogging for Busy Programmers), a portfolio of workshops (DDD, Event Storming, Hotwire, Code Mentoring, AI-Native Rails), asynchronous code-mentoring subscriptions, and developer tooling around the event store (res CLI, res-mcp MCP server for AI assistants). Arkency's revenue is generated through professional services engagements (project-based consulting at undisclosed rates), one-time book sales ranging $29-$199, recurring code-mentoring subscriptions via Slack channels, and paid workshops at $419-$719 per attendee. Go-to-market is community-led and content-driven, anchored by a long-running technical blog (since 2012), conference speaking, and open-source credibility rather than paid acquisition, with direct sales engagement through the website for consulting work.

Commercially, the firm carries 5/5 Clutch ratings, claims to have educated 8.5k+ developers, and reports involvement in >100 Rails projects. It remains founder-owned with no disclosed institutional funding and operates entirely remote with an async-first methodology codified in published work. The firm competes in a niche corner of the Ruby ecosystem where deep specialization in legacy rescue and event-driven patterns differentiates it from generalist software consultancies.

Name

Arkency

Legal name

Arkency

Website

https://arkency.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

11–50 employees

Short description

Arkency is a remote-first Ruby on Rails consulting agency that rescues, modernizes, and scales legacy Rails applications for fintech, e-commerce, and enterprise clients globally, supplemented by DDD workshops, technical books, and the open-source Rails Event Store library.

Ownership category

akta.pro rank

Product category

Software Development Consulting

NAICS

Custom Computer Programming Services (541511), Computer Systems Design Services (541512), Computer Training (61142), Professional and Management Development Training (611430)

SIC

Services-Computer Programming Services (7371), Services-Management Consulting Services (8742)

akta.pro primary industry

DevOps, SRE & Platform Engineering Consulting (BPAHAEAK)

akta.pro secondary industries

Platform Engineering & Internal Developer Platforms (IDP) (BPAEAKAC), DevOps, SRE & Platform Engineering (CI/CD, IaC, Containers) (EDABAFAC)

Keywords

• Ruby on Rails consulting
• Legacy code modernization
• Domain-Driven Design workshops
• Event sourcing development
• Fintech Rails solutions

Headquarters

HQ city

Wroclaw

HQ country

Poland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. Ruby on Rails Development & Consulting: Core consulting revenue from rescuing, modernizing, and scaling Rails applications. Includes legacy code modernization, performance optimization, Rails upgrades, and feature development.
2. Workshops & Mentoring: DDD workshops, Event Storming workshops, Hotwire workshops, Code mentoring, and AI-Native Rails training delivered to client teams.
3. Code Mentoring: Personalized async-remote mentoring program with dedicated Slack channel. Senior developers provide code reviews, advice, and guidance on day-to-day work.
4. Domain-Driven Rails Book: Digital book package ($49-$199) covering DDD techniques for Rails applications. Available in PDF, EPUB, MOBI formats. Includes code exercises, community access, and video content.
5. Blogging for Busy Programmers Book: $29 digital book teaching time-efficient blogging techniques for developers.
6. Responsible Rails Book: $49 book on handling production emergencies and being a responsible Rails developer. Written by multiple Arkency team members.
7. Frontend-Friendly Rails Book: Digital book on making Rails more API-friendly for sophisticated frontends. ~100 pages plus bonus chapters.
8. Async Remote Book: $39 book on async-first remote work methodology. 137 pages covering distributed team practices.
9. Fintech Solutions: Specialized Rails development services for fintech sector including financial data processing and event-driven architecture.
10. Frontend Development Services: Modern responsive UI development integrating with Rails backends. Expertise in React and Hotwire. Services include React-to-Hotwire migration.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels9 records

Core offering

Arkency is a Ruby on Rails consulting agency offering custom Rails development, legacy application modernization, Rails version upgrades, and frontend development. They provide specialized Rails services for fintech and event-driven architectures built on Domain-Driven Design and event sourcing. They complement consulting with workshops (DDD, Event Storming, Hotwire, Code Mentoring, AI-Native Rails), published technical books, and the open-source Rails Event Store library.

Product overview

Arkency is a Ruby on Rails consulting agency founded in 2006 offering a portfolio of services, educational products, and open-source tools. The core service offerings include Ruby on Rails custom development, upgrades, fintech solutions, and frontend development. These are complemented by workshops covering DDD, Event Storming, Hotwire, Code Mentoring, and AI-Native Rails. Arkency also produces educational books including Domain-Driven Rails, Responsible Rails, Async Remote, Frontend-Friendly Rails, and Blogging for Busy Programmers. The company's flagship open-source contribution is Rails Event Store, a community-maintained event store library for Ruby and Rails. This portfolio combines consulting services with knowledge products and open-source tools, unified around the expertise in domain-driven design, event sourcing, and maintainable Rails applications.

Differentiator

Problem solved

Functional benefit

Brands

• Rails Event Store: Open-source event store library for Ruby & Rails applications, actively maintained by Arkency.

Quantifiable outcome

• 8.5k+ developers educated through workshops and educational content
• +3 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability4 records

Feature5 records

Scale indicators5 records

Recent moves5 records

Expansion highlights6 records

Direct peers

• Made With Love: Belgian Rails-focused consultancy operating as a small senior team with published thought leadership. Comparable in size, posture, and emphasis on quality Rails engineering rather than scale headcount.
• thoughtbot: US-based Ruby on Rails consultancy of similar size and posture, offering product development, legacy modernization, and design services. Directly comparable as a high-touch Rails/DDD shop with strong content and open-source presence.
• Hashrocket: US Rails consultancy with comparable focus on product development, pairing, and Rails expertise. Overlaps strongly with Arkency on legacy rescue and DDD-style consulting engagements.
• Nopio: Polish Ruby on Rails and JavaScript agency headquartered in Warsaw. Closest geographic and Rails-specialist peer to Arkency, competing for similar European mid-market modernization work.
• reinteractive: Australian Ruby on Rails agency specializing in custom development and Rails upgrades. Mirrors Arkency's Rails rescue and modernization positioning with a similar boutique boutique scale.

Broad incumbents

• Netguru: Large Polish software consultancy offering web, mobile, and product design across many stacks. Overlaps with Arkency on Rails development but at materially greater scale and broader scope.
• 8th Light: US software consultancy known for craftsmanship, pairing, and legacy modernization across Ruby and other stacks. Adjacent competitor for senior-level rescue engagements and DDD-flavored work.
• Sunscrapers: Polish software house with a Ruby/Rails heritage serving US and European clients. Competes in adjacent Rails and Python engagements from a bigger team and broader service catalog.
• The Software House: Silesia-based Polish software agency covering web, mobile, and cloud. Overlaps on Rails/web builds and competes for Silesian and European engineering talent.

Regional players

• OmbuLabs: Latin American (Buenos Aires) Ruby on Rails and Python agency. Comparable boutique Rails consulting model but serving primarily the Americas rather than Europe.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/arkency
• GitHubgithub.com/arkency
• YouTubeyoutube.com/channel/UCL8YpXFH1-y3AaELb0H7c3Q
• Facebookfacebook.com/ArkencyCom
• LinkedInlinkedin.com/company/1033364

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Arkency