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Top Business Service Companies in Ontario

9 of 31 business service companies ranked on evidence in the Q4 2026 edition.

Between them, the 31 business service companies on this page cover accounting (7), tax (7), legal (5) and government (4). They also list work in Toronto, New Brunswick, London and Bolton. 31 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

9 of 31 business service 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.

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All business service companies 9 ranked SMEs 9 ranked

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KELCOM
Security
Windsor, Ontario telecom dealer offering business phone, internet, two-way radio, GPS fleet tracking and security systems
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Why #1: Based in Windsor, Ontario · Founded 1969, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Agilec
Government · Goals · Also in Canada
Agilec is a Canadian career and employment services provider with locations across Ontario.
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Why #2: Based in Ontario, Canada · Founded 1985, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
A.N.G Chartered Professional Accountants
A.N.G Chartered Professional Accountants, which operates as A N G CPA Professional Corporation, is a firm of chartered professional accountants in Vaughan, Ontario.
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Why #3: Based in Vaughan, Ontario, Canada · Founded 1990, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
HK Accounting
Accounting · Tax · Also in Brampton and Bolton
HK Accounting is an accounting practice for small and medium-sized businesses, providing bookkeeping, payroll and administrative support.
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Why #4 (shared): Based in Bolton, Ontario · In business 30+ years, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
H&T Accounting Services
Accounting · Tax · Legal · Also in Mississauga and Toronto
Mississauga accounting firm providing tax returns, bookkeeping, estate planning and audit defence for clients across the GTA
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Why #4 (shared): Based in Mississauga and Brampton, Ontario, Canada · In business 30+ years, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
A to Z Event Management
Learning
A to Z Event Management is an event planning business in Toronto, Ontario. It is led by Angela Zaltsman, who has more than twenty-five years in the events trade.
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Why #6: Based in Toronto, Ontario · In business 25+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Quest Mindshare
Software Development · Also in Canada
Quest Mindshare is a market research supplier that connects researchers with online survey respondents.
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Why #7: Address in Ontario · Founded 2003, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
GBC HR
GBC HR is an HR consultancy in Richmond Hill, Ontario, providing human resources support to small and medium sized organisations.
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Why #8: Based in Richmond Hill, Ontario · Founded 2004, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
ITS
Industrial
ITS is a staffing company that connects employers with qualified workers in the warehousing industry.
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Why #9: Based in Ontario, Canada · In business 20+ years, as stated on its own website, read 9 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
Apex Time Solutions
Energy · Also in Montreal and Halifax
Apex Time Solutions supplies time and attendance systems to employers in Ontario, Canada.
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On record: Based in Ontario, Canada
Billah and Associates
Billah and Associates is an accounting firm in Mississauga, Ontario.
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On record: Based in Mississauga, Ontario, Canada
Bomcas Canada
Accounting · Tax · Video · Also in United States and Edmonton, Canada
Bomcas Canada is an audit, tax and accounting firm serving clients across Canada, with local pages for towns throughout Alberta and Ontario, including Edmonton, Calgary, Ottawa and…
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On record: Based in Alberta and Ontario, Canada
Breakaway
Video · Manufacturing
Breakaway Staffing is a licensed employment agency in Mississauga that connects job seekers with employers across Ontario.
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On record: Based in Mississauga, Ontario, Canada
Canada Virtual Office
Canada Virtual Office supplies a Toronto business address to people who want a professional presence without renting physical premises.
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On record: Based in Toronto, Ontario, Canada · One person
Canadian Innovation Centre
Government · Learning · Energy
Canadian Innovation Centre, known as CIC, guides new ideas towards the market.
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On record: Based in Waterloo, Ontario, Canada
Canadian Payroll and Tax Services
Canadian Payroll and Tax Services is a family-owned tax and payroll practice in Ottawa, Ontario.
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On record: Based in Ottawa, Ontario, Canada · Family-owned
CGI Credit Guard
Tax · Legal · Reporting · Also in Vancouver and British Columbia
CGI Credit Guard Inc. is a licensed and bonded collection agency working across Canada.
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First Frontier Logistics
Logistics
First Frontier Logistics is a freight and logistics firm that moves commercial goods across Canada, the United States and Mexico.
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On record: Office in Ontario
Fuze HR Solutions
Accounting · Government · Logistics · Also in Bolton
Fuze HR Solutions is a recruitment and staffing agency placing candidates in engineering, finance, technology and public sector roles
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On record: Based in Ontario, with offices in Mississauga, Toronto, Markham, Ottawa and Burlington
Gold Line
Gold Line is an employment agency based in Brampton, Ontario, that connects job seekers with client companies.
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On record: Based in Brampton, Ontario
GS Financial Group
Tax
GS Financial Group is a Canadian financial advisory firm with its head office in London, Ontario.
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On record: Based in London, Ontario
GTA Accounting Professional Corporation
Accounting · Tax · Rating · Also in York and Mississauga
Chartered accounting firm in Toronto offering corporate, personal and cross-border tax, bookkeeping and payroll services
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On record: Based in Toronto and Mississauga, Ontario
HM Staffing Solutions
Mississauga staffing agency placing temporary, permanent and contract staff for employers across the Greater Toronto Area
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On record: Based in Mississauga, Ontario
Jacob Accounting
Accounting · Tax · Corporation
Jacob Accounting provides accounting, tax and business planning services in Toronto and the GTA.
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On record: Based in Markham, Ontario

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Top Business Service Companies in Ontario

KELCOM

Agilec

A.N.G Chartered Professional Accountants

HK Accounting

H&T Accounting Services

A to Z Event Management

Quest Mindshare

GBC HR

ITS

Apex Time Solutions

Billah and Associates

Bomcas Canada

Breakaway

Canada Virtual Office

Canadian Innovation Centre

Canadian Payroll and Tax Services

CGI Credit Guard

First Frontier Logistics

Fuze HR Solutions

Gold Line

GS Financial Group

GTA Accounting Professional Corporation

HM Staffing Solutions

Jacob Accounting

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