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Top Software Development Companies for Custom Software Development

67 of 125 software development companies ranked on evidence in the Q4 2026 edition.

Between them, the 121 best-ranked of these 122 software development companies cover web development (106), software development (93), web design (90) and mobile app development (68). They also list work in Ahmedabad, Ivano Frankivs'k, Ukraine, Kyiv and Lviv. 121 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

67 of 125 software development companies ranked on evidence held on 12 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

All software development companies 67 ranked SMEs 59 ranked

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Relia Software
Mobile App Development · Web Development · Software Development · Also in Vietnam
Relia Software is a custom software development company based in Vietnam.
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Why #46 (shared): Founded 2011, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
GroupBWT, LLC
Mobile App Development · Web Development · Software Development · Also in Ukraine
GroupBWT, LLC is a software engineering company that began in Ukraine, with branches and partners in the United States and the United Kingdom.
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Why #46 (shared): In business 15+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
EVRONE
Mobile App Development · Search Engine Optimization · Web Development · Also in Germany
Evrone is an engineering company that builds custom software. Its website cites fourteen years of experience and over two hundred developers.
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Why #52: In business 14+ years · Team of 200+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
SumatoSoft
Mobile App Development · Web Development · Software Development · Also in Belarus
SumatoSoft is a custom software development company that builds and modernises business systems, and has added AI work to its range.
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Why #53: In business 14+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Softermii
Mobile App Development · Web Development · Web Design · Also in United States of America
Softermii is a custom software and AI development company founded in 2014, with offices across the US and Europe.
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Why #54: Founded 2014 · Team of 120+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Flatlogic LLC
Mobile App Development · Web Development · Software Development · Also in Belarus
Flatlogic is a software development company that has built business applications since 2014.
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Why #55 (shared): Founded 2014, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
SmartexLab
Mobile App Development · Web Development · Web Design · Also in United Kingdom
SmartexLab is a boutique IT consulting and custom software company founded in 2014. It builds web and mobile products for small and mid-sized businesses in many countries.
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Why #55 (shared): Founded 2014 · Boutique, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
PC
Pragmatic Coders
Mobile App Development · Web Development · iOS App · Also in Poland
Polish software company building bespoke software and rescuing struggling projects, with a focus on digital health and fintech
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Why #55 (shared): Founded 2014, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Start Matter
Mobile App Development · Web Development · Software Development · Also in Belarus
Start Matter is a custom software development company founded in 2014.
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Why #55 (shared): Founded 2014, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Third Rock Techkno
Mobile App Development · Web Development · Software Development · Also in Ahmedabad
Third Rock Techkno is a software development company that now emphasises AI.
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Why #59: Founded 2015 · Team of 50+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Thinkitive Technologies
Mobile App Development · Web Development · Software Development · Also in Pune
Thinkitive Technologies is a software product development company founded in 2015 and headquartered in Pune, India.
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Why #60: Founded 2015, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Bild Studio
Web Development · Web Design · UI/UX Design · Also in Montenegro
Bild Studio, also written Bild, is a software and design company that supports CTOs and product teams from proof of concept to production.
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Why #61 (shared): In business 10+ years · Team of 70+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
BoTree Technologies Pvt. Ltd.
Web Development · Software Development · Web Design · Also in India
BoTree Technologies Pvt. Ltd. is a software development company with offices in the USA, Singapore and India.
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Why #61 (shared): In business 10+ years · Team of 100+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Attractor Software
Web Development · Software Development · Web Design · Also in Kyrgyzstan
Attractor Software LLC is a custom software development company founded in 2016.
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Why #63 (shared): Founded 2016, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
DZENSOFT
Mobile App Development · Web Development · Software Development · Also in Belarus
Software development company building dedicated remote engineering teams and custom applications for clients of all sizes
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Why #63 (shared): In business 10+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
IT company StartLightSoft
Mobile App Development · Web Development · Software Development · Also in Ukraine
Ukrainian software engineering company building custom web, mobile and SaaS products for start-ups and established firms
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Why #63 (shared): Founded 2016, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Clock Limited
Mobile App Development · Web Development · Software Development · Also in United Kingdom
UK custom software agency designing, building and supporting platforms and apps for gaming, publishing and travel brands
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Why #66: Cyber Essentials, professional accreditation, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
Altoros
Web Development · Software Development · Blockchain Development · Also in United States of America
Altoros is a software engineering consultancy that works with SaaS companies and product teams.
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On record: Team of 300+, as stated on its own website, read 6 Oct 2026
Bitnoise Sp. z o.o.
Mobile App Development · Web Development · Software Development · Also in Poland
Bitnoise Sp. z o.o., known as Bitnoise, is a Polish software house that writes custom software and embeds AI in client products.
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On record: Team of 40+, as stated on its own website, read 5 Oct 2026
Navyug Infosolutions Pvt. Ltd.
Mobile App Development · Web Development · Software Development · Also in Bengaluru, India
Navyug Infosolutions Pvt. Ltd. is a software development company based in the Noida and Delhi NCR area of India.
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On record: Team of 80+, as stated on its own website, read 5 Oct 2026
S
Sombra
Mobile App Development · Web Development · Software Development · Also in Lviv and Ivano Frankivs'k, Ukraine
Sombra is a software development company based in Eastern Europe, with its team in Ukraine.
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On record: Team of 100+, as stated on its own website, read 6 Oct 2026
STX Next
Mobile App Development · Web Development · Software Development · Also in Poland
STX Next is a software company based in Poland. It started as a Python development specialist using Django, Angular and React.
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On record: Team of 280+, as stated on its own website, read 5 Oct 2026
WIS Software
Web Development · Web Design · AngularJS · Also in United States of America
WIS Software is a software company with an in-house team working from one office in Rostov-on-Don.
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On record: Team of 55+, as stated on its own website, read 5 Oct 2026
Zibtek
Mobile App Development · Web Development · Software Development · Also in United States of America
Zibtek is a custom software development company. It offers full stack development, web design, digital marketing and AI development, and supplies dedicated engineers to client…
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On record: Team of 250+, as stated on its own website, read 5 Oct 2026

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Top Software Development Companies for Custom Software Development

Relia Software

GroupBWT, LLC

EVRONE

SumatoSoft

Softermii

Flatlogic LLC

SmartexLab

Pragmatic Coders

Start Matter

Third Rock Techkno

Thinkitive Technologies

Bild Studio

BoTree Technologies Pvt. Ltd.

Attractor Software

DZENSOFT

IT company StartLightSoft

Clock Limited

Altoros

Bitnoise Sp. z o.o.

Navyug Infosolutions Pvt. Ltd.

Sombra

STX Next

WIS Software

Zibtek

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