Updated in February 2026 – We’ve researched and ranked the leading custom software development agencies in Montreal, and Sidekick Interactive tops the list. This list highlights each agency’s services, expertise, and client reputation so you can find the best fit for your project.
In this guide, we will review and compare the best custom software development companies in Montreal Canada based on client feedback from trusted review sites. As an engineering manager, startup founder or head of engineering looking for a trusted long-term mobile app development partner, this guide will help you identify quality companies in the Montreal area.
Comparison table : top custom software development companies in Montreal, Canada
| Rank | Company | Year in business | Rating | Review count |
| 1 | Sidekick Interactive | 15 | 5.0 | 55 |
| 2 | Webisoft | 10 | 4.9 | 96 |
| 3 | eXolnet | 19 | 5.0 | 50 |
| 4 | Algossed Labs | 5 | 5.0 | 26 |
| 5 | Nventive x Wepoint | 18 | 4.8 | 36 |
| 6 | Osedea | 15 | 4.7 | 58 |
| 7 | Spiria | 23 | 4.7 | 59 |
| 8 | Uzinakod | 11 | 4.8 | 19 |
Our ranking methodology
To create our list of top custom software development agencies in Montreal Canada 2026, we compiled data from five of the most trusted platforms for reviewing and rating mobile application development firms. Each review and its corresponding rating were gathered, and then we calculated a comprehensive summary score for each custom software development company in Montreal across every platform.
The overall rating we display is based on a Bayesian average, a statistical method designed to produce a more balanced and reliable score for Montreal custom software development agencies. This method takes into account both the number of clients reviews a company has and the ratings provided in those reviews. This approach prevents companies with only a handful of extremely positive or negative reviews from being artificially overvalued or undervalued. In other words, Montreal custom software development companies with more reviews carry more statistical weight, while those with very few reviews are adjusted toward a neutral baseline until they accumulate more customer feedback.
The companies we have reviewed are all headquartered in Montreal, not large firms that simply station an employee or two in a shared workspace to claim a Montreal location. Choosing one of these top custom software development agencies in Montreal ensures that you will be collaborating with developers genuinely located in your time zone, providing local expertise, prompt communication, and high-quality custom software development services.
1. Sidekick Interactive
★
★
★
★
5.0 (55 reviews)
Company founded in 2011 | Visit website
Sidekick Interactive is a custom software development compagny founded in 2011 and based in Montreal. Sidekick Interactive works with clients ranging from startups to enterprise organizations to build custom software solutions tailored to their business needs. Their services include native iOS/Android apps, cross-platform mobile solutions, web applications, backend systems, API integrations, and application modernization. The team prioritizes clear communication, agile development practices, transparent pricing, and the ability to adjust development resources to match project requirements. By working with Sidekick Interactive, clients benefit from a Montreal-based team dedicated to delivering high-quality custom software development on time and on budget.
 |  |  |  |  |
| 4.9 | 4.8 | 4.9 | 5.0 | 5.0 |
| 8 reviews | 18 reviews | 2 reviews | 8 reviews | 19 reviews |
2. Webisoft
Company founded in 2016 | Visit website
Webisoft was founded in 2016 and is a Montreal-based software development agency that provides custom digital product development services. The company works on web applications, and mobile-oriented solutions, covering areas such as architecture design, development, testing, and deployment.
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| 5.0 | 4.9 | 4.7 | 5.0 | 5.0 |
| 25 reviews | 21 reviews | 4 reviews | 27 reviews | 19 reviews |
3. eXolnet
★
★
★
★
5.0 (50 reviews)
Company founded in 2007 | Visit website
eXolnet is a custom software development company founded in 2007. The company focuses on designing and building tailored software solutions for businesses, including web applications, enterprise systems, and digital platforms. Its services cover full-cycle development, from requirements analysis and architecture design to deployment and maintenance.
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| 5.0 | ||||
| 50 reviews |
4. Algoseed Labs
★
★
★
★
5.0 (26 reviews)
Company founded in 2020 | Visit website
Algoseed Labs is a Montreal-based custom software development company founded in 2020. The company offers custom web and application development services, along with e-commerce and UX/UI design solutions. Algoseed Labs works with clients using agile development practices and iterative delivery approaches to build software products based on project specifications and technical requirements.
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| 4.9 | 5.0 | |||
| 17 reviews | 9 reviews |
5. Nventive x Wepoint
Company founded in 2008 | Visit website
Nventive x Wepoint is a custom software development company founded in 2008, specializing in custom iOS and Android applications, cross-platform mobile solutions, AI solutions, and web applications. Their approach focuses on close collaboration with clients, agile development practices, and flexible resource management, enabling startups and enterprise clients to accelerate their digital projects while ensuring high-quality mobile solutions and timely delivery.
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| 4.8 | 4.7 | |||
| 16 reviews | 20 reviews |
6. Osedea
Company founded in 2011 | Visit website
Osedea is a custom software development company founded in 2011, providing end-to-end software engineering services, including custom application development, UX/UI design, and artificial intelligence solutions. The company emphasizes collaborative client engagement, agile workflows, and adaptable resourcing. Its solutions are designed for industries such as manufacturing, healthcare, mining, agri-food, and finance.
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| 4.9 | 4.3 | 4.9 | ||
| 38 reviews | 1 review | 19 reviews |
7. Spiria
Company founded in 2003 | Visit website
Spiria is a software development company founded in 2003. The company offers custom software development services, including web and mobile applications, UX/UI design, and software modernization. Spiria works with organizations to design, build, and support digital products across various industries.
8. Uzinakod
Company founded in 2015 | Visit website
Uzinakod was founded in 2015 and provides custom software development and digital product engineering services. The company specializes in building web applications, enterprise software. They work with organizations to design, develop, and deploy software systems u