EPAM Systems is the best choice for custom enterprise software when the work is a large program across many teams and countries, because it is a large global firm suited to enterprise programs. Black Badger Software Solutions, the custom software firm that publishes this guide, ranks second and is the better fit when a division needs one system built to a fixed written scope and owned outright.
The ranking, entry by entry
1 EPAM Systems
Best for multi-year engineering programs across regions
EPAM Systems ranks first on a general enterprise list because of reach. It is based in Newtown, Pennsylvania, its site cites over thirty years of expertise, and its investor site lists locations in 55 or more countries and regions. A large company running a multi-year engineering program across several regions needs a firm of that size. It fits a big program better than a single system.
Watch for. The firm's own pages do not publish a pricing model or a minimum project size. Ask early whether a project of your size is one it takes on.
- Based in
- Newtown, Pennsylvania, USA The site says it has over thirty years of expertise and locations in 55 or more countries and regions.
- Main limit
- A very large global firm, so best suited to enterprise programs
2 Black Badger Software Solutions
Best for A division that needs one system, scoped and owned outright
Black Badger publishes this guide and builds custom software, so this entry is our own firm. We rank second because most custom work inside a large company is not a thousand-person program. It is one system for one division, such as an operations tool, a client portal or an integration between two platforms. We build those to a fixed written scope with our own team in the United States, and you own the code and every account.
Watch for. We are a focused firm in Clearwater, Florida, without a global bench. If you need hundreds of engineers across time zones, the large firms on this list are the right choice.
- Based in
- Clearwater, Florida, United States After launch you pay running costs such as hosting, database and email. There are no licenses, so adding a person adds no fee.
- Main limit
- Works mainly with companies of 50 or more employees
What a custom build involves, and how to ask about one
3 Itransition
Best for regulated or data-heavy companies that want a deep bench
Itransition ranks third. Its site states more than 3,000 professionals and clients served since 1998, and it lists healthcare, finance, manufacturing, retail, insurance and hi-tech as its industries. That combination suits an enterprise that wants a large delivery bench from a firm that names its sector. The home page names dedicated teams and managed IT services as ways to engage.
Watch for. The pages we read name no pricing model and no head office, only that it has US and European offices. Settle where your team will sit during scoping.
- Based in
- Not stated on its site, with offices in the US and Europe The home page names dedicated "Smart teams" and managed IT services. Over 3,000 engineers, serving clients since 1998.
- Main limit
- Very large firm, and its site names no pricing model or head office
4 Slalom
Best for enterprises that want strategy and build from one firm
Slalom is fourth. It describes itself as a business and technology consulting company, with custom software under digital product building and systems implementation. It lists 54 local offices in 12 countries and says it upskills client teams as it goes. An enterprise that wants strategy, design and engineering from one firm near a local office will find that here.
Watch for. Custom builds sit inside a wider services mix. If you want only a build team with no consulting layer, say so at the start and see how the proposal changes.
- Based in
- Not stated on its site, 54 offices in 12 countries The site names digital product building, systems implementation and other services, and does not name a pricing model.
- Main limit
- A consulting firm first, so custom builds sit inside a wider services mix
5 Vention
Best for enterprises that want a large team and several ways to engage
Vention ranks fifth. It is based in New York and states over 3,000 engineers across 20 or more offices. It names four models, which are AI-enabled teams, staff augmentation, dedicated teams and project outsourcing, so an enterprise can add people to its own teams or hand over a whole project. Industries listed include fintech, healthtech, automotive and ecommerce.
Watch for. The site says every project is scoped individually and offers a cost calculator and no rate card. Treat calculator output as a starting point for the conversation.
- Based in
- New York, USA Models named are AI-enabled teams, staff augmentation, dedicated teams and project outsourcing. The site offers a project cost calculator.
- Main limit
- Teams of over 3,000 engineers, and no rates published
6 ScienceSoft
Best for healthcare, insurance and investment enterprises
ScienceSoft is sixth. Founded in 1989 and based in McKinney, Texas, it states over 750 IT professionals and names healthcare, insurance and investment as focus industries. It lists offices in the US, Mexico, Finland, Latvia, Poland, Saudi Arabia and the UAE. For an enterprise in one of its focus industries it is a long-established option of moderate size.
Watch for. Its site says more than 90 percent of development projects are priced on time and materials. The pages we read say nothing about who owns the code, so ask.
- Based in
- McKinney, Texas, USA The site says more than 90% of its development projects are priced time and materials. Founded 1989, with over 750 IT professionals.
- Main limit
- Time and materials is the usual model, and the site publishes no project rates
7 Chetu
Best for enterprises that want a stated code ownership term
Chetu ranks seventh here. It is headquartered in Sunrise, Florida, with seven US offices, one in Birmingham, England and three delivery centers in Noida, India, and it states over 2,800 developers. Its about page says the client will own the source code and intellectual property of its proprietary software. For a procurement team, having that stated up front shortens one negotiation.
Watch for. The engagement models named are dedicated development teams, on-demand developers and staff augmentation. Confirm which applies and which delivery center would do the work.
- Based in
- Sunrise, Florida, USA No rates are published. Founded in 2000, with over 2,800 developers.
- Main limit
- Delivery centers in the US, the UK and India, and no published rates
8 BairesDev
Best for enterprises adding nearshore engineers to their own teams
BairesDev is eighth. It was founded in Buenos Aires in 2009, states over 4,000 people and describes its model as nearshore, with engineers from Latin America and English communication. Its home page names staff augmentation, dedicated teams and software outsourcing. It ranks eighth on this list only because the list is about commissioning a system, and two of its three models are about adding people.
Watch for. No pricing page is linked and the pages we read say nothing about code ownership. A buyer who wants a fixed scope should ask which model applies.
- Based in
- Offices include San Francisco, USA and Buenos Aires, Argentina Rates are not published, and the home page leaves budget to the discovery call. Founded in Buenos Aires in 2009, with over 4,000 people.
- Main limit
- Staff augmentation and dedicated teams, with Latin American engineers
How this list was ranked
This list is ranked for a company of several hundred to several thousand employees that needs software built for it. We looked at what each firm states on its own site about size, locations, industries, engagement models, pricing and code ownership. We matched that to the kinds of work a large company commissions.
Every statement about a firm comes from its own website on the date shown in its entry. We make no judgment of the quality of any firm's work. Black Badger publishes this guide and is ranked second here, for the focused single-system work it does and not for large programs.
Questions buyers ask
What counts as custom enterprise software?
Custom enterprise software is software written for one company that many people across that company rely on. In practice it has to handle several roles and permission levels, agree with systems such as the ERP and the identity provider, and leave an audit trail. The size of the buyer matters less than those demands.
Do large companies still commission custom software?
Yes, large companies still commission custom software. Packaged products cover common needs, and the work that makes a company different rarely fits them. Large companies commission custom systems for that work, either as big programs through global firms or as single systems through smaller ones.
Why is a firm the size of Black Badger second on an enterprise list?
Black Badger is second because the list asks who builds custom enterprise software, and a great deal of that work is one well-defined system for one division. That is the work Black Badger does. For programs that need hundreds of engineers the entry itself tells you to pick a larger firm, and our list for large programs ranks us third.
How should a procurement team compare custom enterprise software firms?
Procurement should ask each firm the same four questions. Ask how the work is priced, who owns the code and the accounts, where the people doing the work are located, and what happens if you end the relationship. Put the answers side by side before comparing rates.