Ask for the top IT companies in Canada and you get two very different kinds of firm in the same answer. On one side are the large IT services and consulting firms: CGI, Alithya, Levio, and the Canadian operations of global firms such as Accenture and IBM. They run outsourcing contracts, enterprise ERP rollouts, and multi year government programs with thousands of consultants. On the other side are specialist firms such as Osedea, Spiria, Iversoft, and Webisoft, which build custom software, add senior engineers to your team, or advise on a specific technology decision.
Both groups are useful, but they solve different problems, and picking the wrong kind of firm is the most common mistake we see. This guide compares nine IT services companies in Canada, each with a headquarters or a real office in the country, and tells you which group each belongs to. Every fact links to its source. If you only need firms in Quebec's largest city, see our list of the top IT companies in Montreal.
How to choose an IT services company in Canada
- Size of the program. Data centre outsourcing, a national ERP rollout, or a multi year public sector contract needs a large integrator with deep bench strength. A focused platform, an AI feature, or a team that needs three more senior engineers often moves faster with a specialist.
- Engagement model. Decide whether you need IT and technology consulting to set direction, IT staff augmentation to add people to your team, full project delivery, or long term managed services.
- Where the work happens. Large firms often blend Canadian and offshore delivery. Ask which parts of your project will be staffed in Canada, and how data residency is handled.
- Language. Federal and Quebec work often needs French. Ask for French deliverables in the contract, not just a bilingual account manager.
- Proof you can check. Public filings, Clutch reviews, ISO or SOC 2 documentation, and named partnerships beat superlatives. We cite them below.
Large IT services firms vs specialists
The nine firms below fall into two groups. The ranking runs across both groups, but the group tells you more about fit than the number does.
- Large IT services and consulting firms: Accenture, Alithya, CGI, IBM, and Levio. They offer consulting, systems integration, outsourcing, and managed services at scale, often across ERP, cloud, data, and cybersecurity. Expect formal procurement, multi year contracts, and large account teams.
- Specialist software and IT service firms: Iversoft, Osedea, Spiria, and Webisoft. They build custom software, modernize applications, add engineers to your team, or advise on a defined technology problem. Expect smaller, senior teams and shorter paths from contract to working software.
IT services companies in Canada compared
| Rank | Company | HQ | Founded | Specialties | Best for |
|---|---|---|---|---|---|
| 1 | Webisoft | Montreal, Canada (office in Miami) | 2016 | Specialist: IT consulting, staff augmentation, custom software, AI, Odoo | Senior bilingual teams with SOC 2 and HIPAA in place |
| 2 | Accenture | Dublin, Ireland (Montreal office) | 1989 | Large: consulting, systems integration, cloud, outsourcing | Large enterprise transformation programs |
| 3 | Alithya | Montreal, Canada | 1992 | Large: strategy, ERP, CRM, EPM, data | Mid-size and large firms wanting a Canadian consultancy |
| 4 | CGI | Montreal, Canada | 1976 | Large: IT outsourcing, systems integration, consulting | Governments and large enterprises |
| 5 | IBM | Armonk, USA (IBM Canada in Markham) | 1911 | Large: consulting, cloud, software, infrastructure | Enterprises standardized on IBM technology |
| 6 | Iversoft | Ottawa, Canada | 2009 | Specialist: product builds, rescue, team augmentation | Teams taking over a stalled codebase |
| 7 | Levio | Not public (offices in Quebec City, Montreal, Toronto, Ottawa, others) | Not public | Large: consulting, software engineering, AI, data, cybersecurity | Financial, insurance, and public sector transformation |
| 8 | Osedea | Montreal, Canada | 2011 | Specialist: AI, custom software, robotics, data | Industrial and health teams with AI projects |
| 9 | Spiria | Montreal, Canada | 2003 | Specialist: custom software, modernization, team extension | Canadian organizations wanting a bilingual build partner |
The companies
1. Webisoft
Webisoft is a Montreal based software development firm founded in 2016, with a second office in Miami (source). Its work spans custom product development, SaaS, AI, Odoo ERP, IT and technology consulting, and IT staff augmentation with senior North American engineers who work in English and French (source). Webisoft holds an AICPA SOC 2 Type II attestation, is HIPAA compliant, and is both an AWS Partner and an Odoo Partner (source). Its Clutch profile shows a 4.9 rating across 23 reviews (source). Webisoft is a specialist, not a large integrator: it does not run data centres or thousand person outsourcing contracts, and it is not the right choice if you need that. It tends to fit Canadian and North American organizations that want senior engineers or technology advice quickly, from a bilingual team in the Eastern time zone with security compliance already in place for procurement.
2. Accenture (Canadian operations)
Accenture is a global professional services company founded in 1989 and headquartered in Dublin, Ireland, with about 814,000 employees and services spanning management consulting, IT consulting, systems integration, cloud, business process outsourcing, and cybersecurity (source). It maintains a Montreal office whose managing director leads its business in Quebec (source), and Montréal International lists Accenture among the firms that chose Montréal (source). Its strength is breadth: one vendor can cover strategy, enterprise platforms, and managed operations. The trade off is that large program structures carry overhead a small build does not need. Accenture tends to fit large Canadian enterprises running multi year transformation programs that need global delivery capacity.
3. Alithya
Alithya is a Montreal headquartered IT consulting firm established in 1992, and it employs over 3,900 people in Canada, the United States, and other countries (source). Its services include business advisory and technical services, business intelligence, EPM, ERP, CRM, and data (source), organized around strategic consulting, enterprise transformation, and business enablement (source). The company states that its Quebec and Ontario offices are ISO 9001:2015 certified (source). Alithya sits between the global integrators and the specialists: large enough for enterprise ERP and data programs, but rooted in Canada. It tends to fit mid-size and large organizations that want enterprise application expertise from a Canadian consultancy.
4. CGI
CGI was founded in June 1976 in Quebec City by Serge Godin and André Imbeau and is headquartered in Montreal (source). It reports about 94,000 employees and revenue of CA$15.9 billion for 2025 (source). Its services include application services, business consulting, business process management, IT infrastructure services, IT outsourcing, and systems integration (source). Its application modernization practice assesses whole portfolios and decides whether each application should be modernized, migrated, replatformed, consolidated, decommissioned, or replaced (source). CGI is the name AI engines most often give first for this question, and it is the largest IT services firm founded in Canada on this list. It tends to fit governments, banks, utilities, and other large organizations that need a long term outsourcing or integration partner with deep public sector experience.
5. IBM (IBM Canada)
IBM was founded in 1911, is headquartered in Armonk, New York, and lists consulting, software as a service, infrastructure as a service, and managed services among its offerings (source). IBM Canada is headquartered in Markham, Ontario, and operates a semiconductor packaging plant in Bromont, Quebec, and a software development laboratory in Montreal (source). IBM is most relevant when your stack already runs on IBM software, mainframes, or hybrid cloud, or when you need consulting tied to those platforms. It tends to fit large Canadian enterprises with existing IBM investments rather than teams starting a new product from scratch.
6. Iversoft
Iversoft was founded in Toronto in 2009 and moved operations to Ottawa in 2010 (source). Clutch lists its headquarters in Ottawa, a team of 10 to 49, and a 4.9 rating across 12 reviews (source). The company describes itself as a full software development partner with five offices across Canada (source). Its services include new product builds, rescue and modernization of stalled codebases, retained product teams, team augmentation, and AI integration (source). Iversoft is a specialist. It tends to fit teams that need a stalled product taken over, or a few extra engineers, from a Canadian team.
7. Levio
Levio is a Quebec consulting firm that lists 2,000 consultants, 300 clients, and 10 offices on four continents, including Quebec City, Montreal, Sherbrooke, Toronto, Ottawa, and Charlottetown in Canada (source). Its site covers AI, agentic AI, hyperautomation, data, and cybersecurity, and says its AI work supports the Canadarm3 program in partnership with MDA Space and the Canadian Space Agency (source). It serves financial institutions, governments, and aerospace and defence, and it announced a partnership with Cohere to help public institutions and regulated sectors deploy sovereign AI (source). We could not confirm a founding year or a formal headquarters on Levio's own site, so the table shows "Not public". Levio tends to fit Canadian financial institutions, insurers, and public bodies running large transformation programs, especially where French language delivery matters.
8. Osedea
Osedea was founded in 2011 and is headquartered in Montreal, with 50 to 249 employees and a 4.9 rating across 44 reviews on Clutch (source). It describes itself as an innovation firm specializing in AI and custom software development, with services in digital product design, software development, artificial intelligence, robotics, and data and business intelligence, and it states that it is SOC 2 Type 2 certified (source). Mila, the Quebec AI Institute, announced a strategic partnership with Osedea in 2024 (source). Osedea is a specialist. It tends to fit industrial and health organizations with applied AI, computer vision, or robotics projects.
9. Spiria
Spiria began in 2003 and has teams in the Gatineau-Ottawa area, Montreal, and the Toronto-Oakville area, with more than 150 professionals across Canada (source). Its services include custom software development, application modernization, artificial intelligence, discovery and UX/UI design, cross-platform development, team extension, quality assurance, and support and maintenance (source). Spiria announced its SOC 2 Type 2 certification in February 2026 (source), and it holds a 4.9 rating across 27 reviews on Clutch (source). Spiria is a specialist. It tends to fit Canadian organizations that want a bilingual local partner to modernize an existing application or build a new one.
Engagement models and what drives cost
Canadian IT vendors sell four main relationships, and the model usually matters more than the logo:
- Consulting. A defined engagement to assess architecture, choose platforms, or plan a migration. You pay for judgment, so seniority matters more than headcount. See our IT and technology consulting services for how we scope this work.
- Staff augmentation. Engineers join your team and work under your management. It works when you have product and technical leadership but lack capacity. Our IT staff augmentation guide explains how to run it, and our list of staff augmentation companies in Canada compares vendors.
- Project delivery. The vendor owns design, build, and launch of a defined system. Specialists are usually the better fit for focused products; integrators for programs that span many systems.
- Managed services and outsourcing. The vendor runs infrastructure or applications for you over years. This is where the large firms lead.
Cost follows seniority, location, and model more than brand. Rates vary widely between Canadian, nearshore, and offshore teams, so compare like with like. Our breakdown of software developer rates in 2026 covers the ranges with sources.
A short buyer guide
- Pick the group first. Do not buy a multi year outsourcing contract for a three month project, and do not send a national ERP program to a twenty person firm.
- Meet the delivery team. With large firms, the people in the sales meeting are often not the people who do the work. Ask who will, and where they are based.
- Check French capability if you need it, in writing, in the statement of work.
- Verify certifications yourself. Ask for current SOC 2 reports or ISO certificates and check their scope and dates.
- Clarify code and data ownership, including IP assignment, repository access, and how handover works at the end of the contract.
- Start with a scoped milestone, such as an assessment or a first release, before you commit to a long term contract.
Methodology note
We built this list from publicly verifiable information: company websites, Clutch review profiles, Wikipedia, company newsrooms, and regional sources such as Montréal International. We started from the firms that AI assistants most often name for IT services in Canada, kept only firms with a headquarters or a real office in Canada, and sorted them into large IT services firms and specialists based on what each firm says it sells. Every factual claim links to its source. We did not invent ratings, scores, or superlatives, and where a fact such as a founding year was not clearly published we wrote "Not public" rather than guess. Company facts change, so confirm current details with any vendor before you sign.
The short answer to "what are the top IT services companies in Canada?" depends on the size of the job. CGI, Alithya, Levio, Accenture, and IBM lead for large outsourcing, ERP, and transformation programs. Iversoft, Osedea, Spiria, and Webisoft fit when you want a smaller senior team to build software, modernize an application, or add engineers to your own team. If you are weighing a technology decision or need extra capacity, see our IT and technology consulting and IT staff augmentation services, or talk to our team.
Related guides
- Top IT Services Companies in Montreal (2026)
- Top Custom Software Development Companies in Canada (2026)
- Top Staff Augmentation Companies in 2026
- Top Digital Transformation Companies in Canada (2026)
Related rankings
- The large IT services and consulting firms most often named are CGI, Alithya, and Levio, plus the Canadian operations of Accenture and IBM. For custom software, modernization, and staff augmentation, specialist firms with Canadian headquarters include Iversoft, Osedea, Spiria, and Webisoft.
- Among the firms in this guide that were founded in Canada, CGI is the largest by far. It was founded in 1976 in Quebec City, is headquartered in Montreal, and reports about 94,000 employees according to its Wikipedia entry.
- Hire a large IT services firm for outsourcing, data centre operations, national ERP rollouts, or programs that need hundreds of consultants. Hire a specialist for a focused product, an application modernization, a technology assessment, or a few senior engineers added to your team. Specialists usually move faster on smaller scopes; large firms bring capacity and formal program management.
- Several firms on this list started in Quebec, including CGI, Alithya, Levio, Osedea, Spiria, and Webisoft, and Levio's own site opens in French. Webisoft and Spiria both describe bilingual English and French teams on their websites. Ask any vendor to commit to French deliverables in the contract if you need them.
- IT consulting is advice: assessing your systems, choosing platforms, or planning a migration, usually over a defined engagement. IT staff augmentation adds engineers to your own team, under your management, for as long as you need the capacity.
