Here are well-rated IT support / managed‑services companies that serve Toronto (shortlist of reputable providers with specialties). I pulled recent listings and verified client‑review profiles — see the citations after each entry.

• Ray Business Technologies — large MSP and IT consulting (on‑prem & cloud, enterprise support). (Clutch.co)
• VBS IT Services — Toronto‑headquartered MSP noted for managed services and awards for “best managed” practices. (vbsitservices.com)
• Goji Labs — ranked on DesignRush as a top IT services agency in Toronto (software, cloud and managed projects). (DesignRush.com)
• CGTechnologies — listed on Clutch among top Toronto MSPs; focuses on outsourced IT, cybersecurity and fast response. (Clutch.co)
• Ajmie Networks — featured in local IT directories as a managed IT provider with 24/7 monitoring and Azure expertise. (CloudSecureTech.com)
• BiTS Managed IT Solutions — listed in regional directories with client praise for proactive monitoring and quick SLA response. (CloudSecureTech.com)
• Firms ranked on Clutch / DesignRush leaders lists — (Clutch and DesignRush maintain updated rankings of Toronto MSPs and IT services; useful for comparing reviews, hourly rates and project sizes). (Clutch.co)

Notes and next steps:

• “Top” varies by what you need: small‑business helpdesk, enterprise outsourcing, cybersecurity, cloud migration, or hybrid workplace support. I can narrow recommendations if you tell me your company size, primary needs (helpdesk, 24/7 monitoring, security, cloud), and budget range.
• If you want, I can fetch and compare 3–5 providers’ recent client reviews, SLAs, pricing tiers and certifications (e.g., Microsoft Gold, ISO, SOC) and provide direct contact/website links.