Looking for a top third party verification service?

This guide contains companies from all over the globe that excel in third-party verification. Their services vary from non-voice BPO/back-office services to voice services to transcription and they provide a multitude of other services your company may need. With all of these options, we know that it can be difficult to navigate the best company for you.

That's why we've created this list of the best third party verification companies for you to review. Read through company descriptions, former clients, and notable projects to find the best fit for your business. (And, if you want personalized recommendations, tell us about your project.)

List of the Best Third Party Verification Agencies

  • 1
    Undisclosed
    250 - 999 Employees
    Encino CA

    Callbox is a business process outsourcing company based in Encino, Calif., with offices in Singapore, Ultimo, Australia, and the Philippines. Founded in 2004, Callbox's team of 174 provides voice services and non-voice BPO/back office services.

    Clients
    Alima Technologies
    Intrepid Advisors
    LexisNexis
    LiQWID
    Industries
    Notable Project

    Callbox was hired by an advertising company to take charge of its telemarketing and lead generation through its outbound calls. Previously the client was handling around 85 calls per day, which saves the client around 40 hours and $50 per month.

    "Their strongest point is their infinity call tracking...Their service is perfect for me." – Marketing Manager, Advertising Company

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  • 2
    $50,000+
    250 - 999 Employees
    Salisbury NC

    GCS Agents is a contact center firm in Salisbury, N.C., founded in 2001. The team of 300 specializes in voice services, consulting, and BPO services for its majority midmarket clients across multiple industries. 

    Industries
    Notable Project

    GCS Agents provided security consulting and analytics for an energy company's database servers. As a result, the client's security services and communication vastly improved, reducing its hours and money spent on the task.  

    "The data security and communications outside of my internal database was and is very excellent. I would love to give their name but I don't do that for security reasons." – IT Executive, Energy Company

  • 3
    $1,000+
    250 - 999 Employees
    Redwood City CA

    Salesify is an information technology firm that has offices in the United States, the Philippines, and India. Founded in 2005, Salesify's team of over 1,500 employees have over a decade of experience specializing in call center services. The firm also offers big data and back-office services to its clients. 

    Clients
    Microsoft
    IBM
    Oracle
    Cisco
    Industries
    Notable Project

    Salesify provided a technology firm with customer support and call center services. The client wanted to improve customer service and collect feedback from consumer interactions. The team at Salesify performed voice call services for the client. The firm collected and organized the data collected from the calls for the client. Salesify's efficiency particularly impressed the client. 

    "They can handle lots of traffic from consumers without failure." – VP of IT, Technology Firm 

  • 4
    $1,000+
    250 - 999 Employees
    Noida India

    Go4Customer is a contact center outsourcing company that is based in Noida, India with other centers in Jaipur, Mumbai, Bengaluru, Chennai, Ahmedabad, and Bhopal, India, South Tiverton, UK, and Houston. Since 2004, their team of over 200 experts have been providing voice/call center services and BPO/back office services. Go4Customer works with different industries including information technology, financial services, and consumer products.

    Clients
    MSME
    BSNL
    TIMEX
    HudCo
    Industries
    Notable Project

    An IT company wanted to smooth over how information enters and leaves the company, so they needed effective outbound services. Go4Customer improved the flow of calls, as well as provided lead generation services through telemarketing. The client is extremely confident in the work that Go4Customer has done.

    "They [Go4Customer] do their work quickly, safely, reliably, and they offer a good service despite the price." – Manager, IT Industry Company

  • 5
    $1,000+
    250 - 999 Employees
    Jefferson City MO

    GroupOne Health Source is a full service medical billing and consulting firm based in Jefferson City, Mo. Since 1991, their current team of 108 has been specializing in non-voice BPO services, voice services, and transcription for clients in the medical field. 

    Clients
    Sunshine Pediatrics
    Prime Healthcare Providence
    South Boston Pediatrics
    Tampa Cardiac Specialists
    Industries
    Notable Project

    A health company needed assistance with their medical billing. GroupOne Health Source provided the long-term service at an affordable price. The staff now has less work to complete since the agency came aboard.

    "Our company saves 20 man-hours on a monthly basis."– Administrative Manager, Health Company

  • 6
    $1,000+
    50 - 249 Employees
    Stafford TX

    Unee Solutions is a business process outsourcing firm based in Stafford, Texas with additional assets in India and Israel. They were founded in 2007 and currently have a staff of 125 employees. Unee Solutions' solutions focus on lead generation and include both voice outsourcing and non-voice back office services.

    Clients
    Kern
    Krohne
    Cimatron Group
    Jurat
    Industries
    Notable Project

    Unee Solutions provides voice lead generation for a luxury bed and breakfast in Colorado. The client wanted to stand out from crowded search results that prioritize large brands and partnered with Unee for a more distinct lead generation strategy. Unee's voice support agents provide outbound calls and booking over the phone. The team has considerably outperformed the client's original in-house efforts.

    "I was paying a couple of people roughly $1,500 per month to do it previously and they were only spending maybe 10 hours in total a week to produce 2 to 4 leads. Now I pay roughly $2,000 for unknown hours with 15 to 20 leads. Invaluable!" — Owner, Colorado Bed and Breakfast

  • 7
    $1,000+
    250 - 999 Employees
    South Jordan UT

    AdvancedMD is a business process outsourcing firm for the healthcare industry. Based in South Jordan, Utah, they have  a branch office in Springfield, Mass. The team was founded in 1999 and includes 590 employees. AdvancedMD offers a wide variety of solutions for independent practices. Their services include non-voice BPO, voice call outsourcing, and integration of medical and enterprise software.

    Clients
    Lineagen
    Center for Balanced Health
    Greenhill Family Clinic
    Industries
    Notable Project

    AdvancedMD provides full-service back office support for a medical clinic in Florida. The services rendered include management of patient records, billing customer support, and business analytics. The client has noted a marked improvement in their practice's efficiency. Advanced MD's contribution is saving hundreds of dollars a month on customer support with strong results.

    "[AdvancedMD] Organizes your life in a simpler way, creating a more comforting work atmosphere, and the best results in less time." — Customer Service Manager, Healthcare Hospitality Clinic

  • 8
    $1,000+
    250 - 999 Employees
    Kyiv Ukraine

    SupportYourApp is a customer support outsourcing company based in Kiev, Ukraine. Founded in 2010, SupportYourApp's team of more than 400 employees provides non-voice BPO/back office services and voice services. 

    Clients
    Mastercard
    Amazon
    HERE Technologies
    MacPaw
    Industries
    Notable Project

    SupportYourApp worked with this software development company to assist with technical customer support. Their wide range of service entails taking charge of all general, pre-sales, and technical questions about the client's Windows and Mac software products.

    "Our website is featured on Shopper Approved, where around 85% of feedback is more than satisfied with support." – Marketing Director, Software Development Company

  • 9
    $1,000+
    250 - 999 Employees
    Chennai India

    4D Global is a medical billing company based in Chennai, India, with an office in Scottsdale, Ariz. Founded in 2015, the agency employs a team of over 50 to provide non-voice BPO/back office services and call center services to clients in the healthcare and medical industries.

    Industries
    Notable Project

    4D Global worked with an IT company to assist in a variety of different projects, from staff augmentation and billing to retirement and health insurance management. With their keen business understanding, they delivered a tailored experience, saving the client about $100,000 per month.

    "Their quality of service is excellent." - IT Director, IT Company

  • 10
    $1,000+
    1,000 - 9,999 Employees
    Woodburn OR

    MattsenKumar is a back office services provider based in Woodburn, Ore., with an office in Gurgaon, India. Founded in 2010, MattsenKumar's team of 364 employees offers voice/call center services and non-voice BPO/back office services.

    Industries
    Notable Project

    MattsenKumar was hired to take over the responsibility of answering this products firm's phone calls. Making up 25% of the client's employees' work, MattsenKumar has been able to fulfill its role by respecting deadlines and being able to solve customers' problems 90% of the time, with efficiency increasing with every month the company stays on.

    "Work these past months has been flawless. They are getting better with their dealings with customers and have been able to generate a strategy to solve the problems in the calls to be more efficient and effective each time." - Director, Products Firm

  • 11
    Undisclosed
    10 - 49 Employees
    King of Prussia PA

    Specialty Answering Service is a call center outsourcing firm based in King of Prussia, Penn. Founded in 1985, they have about 30 employees and work with a national network of freelance customer support specialists. Their services consist of voice customer support and non-voice business process outsourcing.

    Clients
    Bausch+Lomb
    Fujitec
    Colwell Banker
    Notable Project

    Specialty Answering Service serves as a dispatch and management center for a produce distributor. The client has an extensive range of end-clients and delivery providers that requires considerable monitoring and attention to detail. By migrating their dispatch to Specialty Answering Service, the client saved about 520 labor hours per month with comparable outcomes.

    "Their strength is professional handling of calls and increased knowledge of our business, customer service is easy to work with and courteous. Things have run smoothly so far." — Manager, Food Producer

  • 12
    $1,000+
    250 - 999 Employees
    Noida India

    A1 Call Center is a CISCO-based outsourcing call center in Noida, India. Founded in 2009, the company has a team of 6 that specialize in back office and call center services. They primarily work with clients in the consumer products, media, and education industries. 

    Clients
    BetterU
    BIBA
    Network 18
    MMI Online
    Industries
    Notable Project

    A1 Call Center provided customer verification services for a telecommunications company. They conducted outbound calls to collect customer feedback. The former client used the collected data to update their policies and improve their services.

    "It has been a very happy, very enjoyable experience." – Administration Associate, Telecommunications Company 

  • 13
    Undisclosed
    10 - 49 Employees
    Spokane WA

    Sound Telecom is an answering services provider based in Spokane, Wash., with a team of 25. Founded in 1986, the team provides voice and transcription services for clients in a variety of industry.

    Clients
    Boeing
    Microsoft
    Starbucks
    Industries
    Notable Project

    Sound Telecom provided answering services with voicemail and call forwarding features for a healthcare company. The team recorded names and numbers to ease their return call process. All of these services were delivered on time.

    “They are prompt and answer in a personal and professional manner. They offer many benefits with their service. They are affordable and trustworthy.” — Manager, Healthcare Company

  • 14
    $1,000+
    250 - 999 Employees
    New Delhi India

    Founded in 2011, Call2Customers is an outsourced call center in New Delhi, India with roughly 250 employees who provide voice and BPO services. They focus on B2B lead generation and B2C telemarketing for clients.

    Clients
    BETA IT
    TalkWire
    Wealth Partner Australia
    Verified Learning
    Industries
    Notable Project

    A consulting firm partnered with them for outsourcing services at a fair rate. Lead generation increased exponentially with help from the client who has a solid understanding of the market.

    “Call2Customers has a solid knowledge of the American market. They understand my requirements and how to approach marketing teams over here. They’ve even made good suggestions on how I can grow my business. It shows that they care about their work enough to do additional research.” – Owner, Consulting Firm

  • 15
    $5,000+
    1,000 - 9,999 Employees
    Canton OH

    Ameridial is a call center agency. They are headquartered in North Canton, Ohio, and have additional offices in Greenville, S.C. and Bangor, Maine. Founded in 1987, Ameridial has about 193 employees that provide non-voice BPO and back office services.  Clients are in the healthcare, nonprofit, and consumer products and services sectors. 

    Clients
    Flexigroup
    Monat
    Samsung
    KFC
    Industries
    Notable Project

    Ameridial managed a data modeling company inbound and outbound calling, web chat, and IVR hosting needs. They provided these services between 8 am – 11 pm.

    "The company has seen higher Net Promoter Scores each year since our partnership with Ameridial." – Outreach, Data Modeling Company

  • 16
    $1,000+
    50 - 249 Employees
    Hiram GA

    DataPlus is a development and data entry agency in Hiram, Ga. Founded in 1992, they have at least 50 employees that serve clients in the healthcare, financial services, and business services sectors. DataPlus provides voice services and non-voice BPO/ back office services. 

    Industries
    Notable Project

    A consumer products company hired DataPlus for their data entry & cleansing services. Using their services, the company's workload reduced by about 60%. DataPlus was up to the company's standards.

    "I believe that they help the company maintain deadlines; they respond quickly." — Administration Associate, Consumer Products Company

  • 17
    $1,000+
    50 - 249 Employees
    Tempe AZ

    Calibrus is a customer management contact center headquartered in Tempe, Ariz. Founded in 2013, they have about 40 employees that have clients in the business services, consumers products, financial service, healthcare, and retail industries. Their solutions include third-party verification, outbound lead generation, and hosted call recording.

    Industries
    Notable Project

    Calibrus provides customer verification services for a mid-market business in Florida to increase their contact with their customers. Their' level of service impressed the client and saves their business around $2,000 monthly on labor and administrative costs.

    "I think their service is of good quality. The calls are well received and there are no complications." — Customer Service, Mid-size Firm

  • 18
    $1,000+
    250 - 999 Employees
    Kyiv Ukraine
    Answering service Global Bilgi was established in 2008. Their midsize team is in Kyiv, Ukraine and Dnipro, Ukraine. Their services include voice services, non-voice bpo/back office services, CRM consulting and SI, HR services, and more.
    Notable Project

    Global Bilgi provides BPO services for a telecommunications company. The team conducts telesales and customer service, handling incoming calls and creating new business processes from scratch.

    "They are a company that rapidly adopts innovations, which is important for the booming market in Ukraine."

  • 19
    $1,000+
    50 - 249 Employees
    Henderson NV

    Netcast BPO is a call center and back-office outsourcing firm headquartered in Henderson, Nev. with offices in Atlantic City, N.J. and the Philippines. Founded in 2011, they have about 200 employees, and exclusively hires English-fluent university graduates for their offshore operations. Their services include voice support and data entry.

    Industries
    Notable Project

    Netcast BPO provides outbound phone marketing for a U.S. real estate firm. The client chose them based on their strong performance for other clients and well-regarded hiring practices. Netcast BPO's phone agents perform nearly 2500 outbound calls daily with strong lead generation.

    "It is an excellent firm and I have no complaints...we have worked with them ongoing for the past three years." — Senior Marketing Manager, Real Estate Firm

  • 20
    $1,000+
    10 - 49 Employees
    Richardson TX

    VoiceStamps is a professional IVR hosting and design service provider based in Richardson, Texas. Founded in 1999, their now 2 person team specializes in voice services and transcription. VoiceStamps works with a variety of industries including business & financial services and healthcare.

    Industries
    Notable Project

    An IT company hired VoiceStamps for their outbound dialing services. Their goal was to save money, considering they handle about 70% of calls a day. The client thinks VoiceStamps provides them with great work and information.

    "Their quality is their best strength."– Owner, IT Company

  • 21
    Undisclosed
    2 - 9 Employees
    Coral Gables FL

    Founded in 1975, Sunshine Communication Services is an answering service based in Coral Gables, Fla. Their team of about 10 specializes in voice and BPO services. 

    Clients
    Mayo Clinic
    University of Miami
    Jacksonville Orthopaedic Institute
    Notable Project

    A small company was having trouble keeping track of all the phone calls they were receiving. After searching, they decided Sunshine Communication Services were the best fit. They provided custom account design, scheduled phone reports, and more.

    "The benefits, however, are that all calls are answered." —Small Company

  • 22
    $1,000+
    50 - 249 Employees

    Direct TPV is a third party verification company that specializes in BPO and voice services. With over 50 employees, the team works with various industries such as business & financial services and telecommunications. 

    Industries
    Notable Project

    Direct TPV has provided customer verification for a business services company for the past three years. The client says that their cost and quality of work are extremely strong. 

    "They save us about $70 per month." —Business Development Executive, Business Services Company

  • 23
    Undisclosed
    50 - 249 Employees
    Charleston SC

    Call Experts is a contact center outsourcing firm headquartered in Charleston, South Carolina. Founded in 1982, they now have over 200 employees distributed between three call centers on the US east coast. Call Experts provides expert services for voice support, including virtual receptionist services, inbound appointments, and customer support.

    Clients
    Charleston Water System
    College of Charleston
    CharlestonGI
    Industries
    Notable Project

    Call Experts provides voice customer support for a mid-size US IT firm. The client was receiving more calls than they could adequately service, and wanted to free up resources to focus on growth. By partnering with Call Experts, they saved hundreds of customer service working hours. As a result, the client has markedly improved the efficiency of their operations.

    "I like the ease of use and reliability of the services. It allows me to communicate with customers in a remarkably more efficient and time saving manner." — Manager, IT Firm

  • 24
    $1,000+
    50 - 249 Employees
    6th Of October Egypt

    Fusion Global Services (FGS) is a BPO company based in Giza, Egypt. The company, founded in 2016, has a core team of more than 20 that provides voice services, HR services, business consulting, non-voice BPO/back office services, and transcription services. FGS serves mid-market and other-sized companies in various industries that include business services, consumer products & services, and gaming.

    Clients
    Bosta
    Industries
    Notable Project

    A logistics and shipping company hired Fusion Global Services (FGS) to provide outsourced call center services to augment their in-house call center. FGS agreed to the number of calls that the company needed them to do, the average handling time per call, and the quality of each call. FGS has been delivering on these metrics and, if any issues come up that need to be fixed of adjusted, they are quickly fixed.

    "They adapt to our business and make sure they have proposals to make sure we’re always succeeding." - Head of Customer Care, Logistics and Shipping Company

  • 25
    $1,000+
    50 - 249 Employees
    Omaha NE

    Complete Call Solutions is a voice services outsourcing firm in Omaha, Nebraska. Founded in 2008, they have about 74 employees that serve clients in the retail, hospitality, and financial services sectors. 

    Industries
    Notable Project

    Complete Call Solutions provides seasonal customer support to an accounting firm around each year's tax filing deadline. Their inbound calls quadruple for a fairly consistent period of weeks around the deadline, and they need additional support to convert on those leads. Complete Call Solutions' services include switchboard, answering, and direct calls.

    "They were excellent. We did train them a bit in what we needed them to do to help our company, and they handled that like pros. Our customers thought they were talking to people who work for us." — HR Manager, Accounting Firm

  • 26
    $1,000+
    10 - 49 Employees
    Palo Alto CA

    ProComm is a teleservice company based in Palo Alto, Calif. Founded in 1991, they have about 50 employees and have clients in the healthcare industry. They specialize in voice and BPO services.

    Industries
    Notable Project

    ProComm provided answering services and scheduling to a telecommunications firm to increase their customer service, which helped improve the company's efficiency. 

    "They meet our expectations and have even gone above them." — Customer Service Manager, Telecommunications Firm

  • 28
    Undisclosed
    1,000 - 9,999 Employees
    Shah Alam Malaysia

    Daythree Business Services is a business service provider in Petaling Jaya, Malaysia. They provide voice services, back office services, and business consulting. They work primarily with midmarket and enterprise companies in transportation, telecommunication, and energy industries. Founded in 2008, they have about 150 employees.

    Industries
    Notable Project

    Daythree Business Services provided a telemarketing team to support contract negotiations and to contact customers based on targeted campaigns. They provide training, monitoring, and quality assurance. Since the project began, there has been improvement in several areas. They’re engaged and provide qualified agents. They’re cooperative and responsive.

    “[They’re] willing to listen to feedback and reverts with proposals for discussions.” – Head of Telesales, Telecommunication Company

  • 29
    $1,000+
    10 - 49 Employees
    Kolkata India

    Xplore-Tech is a BPO company founded in 2004 in Kolkata, India. Xplore-Tech looks to provide voice/call center services, non-voice BPO/back office services, and transcription capabilities to clients in Canada, the U.S., the Philippines, and India. The firm operates with a team of fewer than 10 employees. 

    Industries
    Notable Project

    Xplore-Tech was hired by an IT company to field its 500,000 inbound calls per day. The partnership began in 1995 and continues to this day. 

    "They have great service and speedy resources." — IT Manager, Technology Company

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