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BBB Accredited Business since


Phone: (617) 244-8560 Fax: (617) 244-5560 9 Summer Street Suite 201, Franklin, MA 02038

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A family owned business founded in 1955, Sostek specializes in referring private caregivers who provide affordable senior care and companion services on a 24 hour live-in or hourly live-out basis.  As a household employer, our customers determine the schedule and services they want the caregiver to provide.  For customers who prefer to have a professional payroll service handle those responsibilities, we can assist you in locating local resources that can quickly simplify the entire payroll process for you.  We do the initial screening, including reference and CORI checks, but you control the things that are important to you, and you have the final decision regarding hiring the caregiver.

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BBB Accreditation

A BBB Accredited Business since

BBB has determined that Sostek meets BBB accreditation standards, which include a commitment to make a good faith effort to resolve any consumer complaints. BBB Accredited Businesses pay a fee for accreditation review/monitoring and for support of BBB services to the public.

BBB accreditation does not mean that the business' products or services have been evaluated or endorsed by BBB, or that BBB has made a determination as to the business' product quality or competency in performing services.

Reason for Rating

BBB rating is based on 13 factors. Get the details about the factors considered.

Factors that raised the rating for Sostek include:

  • Length of time business has been operating
  • No complaints filed with BBB

Industry Ratings Comparison | Chart

Customer Complaints Summary

0 complaints closed with BBB in last 3 years | 0 closed in last 12 months
Complaint Type Total Closed Complaints
Advertising/Sales Issues 0
Billing/Collection Issues 0
Delivery Issues 0
Guarantee/Warranty Issues 0
Problems with Product/Service 0
Total Closed Complaints 0

Customer Reviews Summary Read customer reviews

0 Customer Reviews on Sostek
Customer Experience Total Customer Reviews
Positive Experience 0
Neutral Experience 0
Negative Experience 0
Total Customer Reviews 0

Additional Information

BBB file opened: February 18, 2005 Business started: 01/01/1955 in MA Business incorporated 03/11/1975 in MA
Type of Entity


Business Management
Mr. Donald Sostek, President
Contact Information
Principal: Mr. Donald Sostek, President
Number of Employees


Business Category


Method(s) of Payment
Personal Check
Business Check
Service Area
Sostek provides their services in MASSACHUSETTS.
Alternate Business Names
Cecily M. Sostek, Inc.
Industry Ratings Comparison Chart X
Same Relative Size   All Businesses
The information in the chart below represents an industry ratings comparison of businesses which are of the same relative size or for all businesses (see toggle). This is based on BBB's database of businesses located in Eastern Massachusetts, Maine, Rhode Island and Vermont. Businesses may engage in more than one type of business.

BBB Customer Review Rating plus BBB Rating Overview

BBB Customer Reviews Rating represents the customers opinions of the business. The Customer Review Rating is based on the number of positive, neutral and negative customer reviews posted that are calculated to produce a score.

Customer Review Experience Value
Positive Review 5 points per review
Neutral Review 3 points per review
Negative Review 1 point per review

BBB letter grades represent the BBB's opinion of the business. The BBB grade is based on BBB file information about the business. In some cases, a business' grade may be lowered if the BBB does not have sufficient information about the business despite BBB requests for that information from the business.

BBB Letter Grade Scale

BBB Rating Value
A+ 5
A 4.66
A- 4.33
B+ 4
B 3.66
B- 3.33
C+ 3
C 2.66
C- 2.33
D+ 2
D 1.66
D- 1.33
F 1
NR -----
Star Rating scale

  Average Score
5 stars 5.00
4.5 stars 4.50-4.99
4 stars 4.00-4.49
3.5 stars 3.50-3.99
3 stars 3.00-3.49
2.5 stars 2.50-2.99
2 stars 2.00-2.49
1.5 stars 1.50-1.99
1 star 0-1.49

BBB Customer Review Rating plus BBB Rating is not a guarantee of a business' reliability or performance, and BBB recommends that consumers consider a business' BBB Rating and Customer Review Rating in addition to all other available information about the business. If the BBB Rating is NR then only Customer Reviews are used for the Star Rating.