Top Managed IT Companies in Mississauga

Third Octet

Managed IT for the Modern SMB

✓ Verified Provider ⭐ 5.0/5 Stars Est. 2007
Mississauga, ON
10–49 employees
Founded 2007
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Third Octet is a managed IT services provider based in Mississauga, ON, operating since 2007. Across 10 verified Google reviews it averages 5.0 out of 5, a public track record you can weigh during diligence. It focuses on Managed IT Services, Cloud Services, Microsoft 365. Compare it against other Mississauga managed IT providers, then request a quote.

Vetted by the Best IT MSP editorial team · Last updated October 2026

About Third Octet

Third Octet has provided managed IT services to Canadian small and mid-sized businesses since 2007, recognized among Canada's top 50 MSPs and Channel Futures' top MSPs worldwide.

Services Offered

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Managed IT Services
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Cloud Services
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Microsoft 365

Industries Served

💰 Financial Services
⚖️ Legal
📋 Professional Services
🏭 Manufacturing
🏥 Healthcare

Why Choose Third Octet

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Based in Mississauga

Third Octet is headquartered in Mississauga, ON, so Mississauga businesses get a local team for on-site work instead of a distant call center.

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Recognized in Globe and Mail's Top MSPs

Recognized in Globe and Mail's Top MSPs

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Named in Canada's 50 Best Managed IT Companies

Named in Canada's 50 Best Managed IT Companies

Offices

Third Octet lists 2 offices. Choose one to see it on the map.

Certifications & Compliance

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Recognized in Globe and Mail's Top MSPs
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Named in Canada's 50 Best Managed IT Companies
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Channel Futures Top MSPs Worldwide award

Frequently Asked Questions

What do Third Octet reviews say?

Across 10 verified Google reviews, Third Octet averages 5.0 out of 5. Weigh that public track record alongside a direct quote.

Which IT services does Third Octet provide?

Third Octet delivers Managed IT Services, Cloud Services, Microsoft 365 to organizations across Mississauga, ON.

What area does Third Octet serve?

Third Octet is based in Mississauga, ON and supports businesses across Mississauga and the greater metro area.

When did Third Octet start?

Third Octet has been operating since 2007.

Is Third Octet certified?

Third Octet carries Recognized in Globe and Mail's Top MSPs, Named in Canada's 50 Best Managed IT Companies, Channel Futures Top MSPs Worldwide award.