Top 100 Third Party Verification Companies

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Top 100 Third Party Verification Companies

February 2023

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. 

Jump to Most Reviewed Companies

List of the Best Third Party Verification Agencies

  • 1
    • $1,000+
    • 250 - 999 employees
    • Wilmington, DE

    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 provides customer support services for a mediation app in 19 languages. The team handles the client's social media accounts, processes documentation, and escalates complex cases.

    "They are always ready to help and take on new things and responsibilities."

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  • 2
    • Scheduling

      4.6
    • Quality

      4.6
    • Cost

      4.3
    • NPS

      4.6
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 250 - 999 employees
    • Los Angeles, 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

    A SaaS provider has engaged with Callbox for demand generation. They create a list of target accounts, a landing page, email and message copy, a calling script, and a multi-channel demand generation program.

    "Callbox is an experienced demand generation company."

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  • 3
    • $1,000+
    • 1,000 - 9,999 employees
    • Princeton, NJ

    Flatworld Solutions is an outsourcing company headquartered in Princeton, N.J. Founded in 2006, they have a team of over 750 employees. The firm's international offices are based across India, the U.K, and the Philippines and has experience in nonvoice/ back office, transcription, and call center services. Their Clients mostly work in manufacturing, education, and healthcare industries. 

    Clients

    • MSN
    • Korchina
    • Fujitsu
    • Yale School of Management

    Industries

    Notable Project

    Flatworld Solutions designed and built the second version of a baseball development center's mobile app. 

    "The team really did well with accommodating feedback and fixing issues in a timely manner."

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  • 4
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      4.4
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $50,000+
    • 10,000+ employees
    • Wei Fang Shi, China

    Welsend Telecom Co., Ltd. Is a CRM consulting and SI company. Their large team is in Weifang, China; Chengdu, China; Mianyang, China and Rizhao, China. Their services include CRM consulting and SI, voice services, and non-voice bpo/back office services. The firm was founded in 1999.

    Industries

    Notable Project

    A government hotline team has collaborated with Welsend for call center services. The team provides 24-hour customer service support and is responsible for a particular hotline to professionally handle traffic. 

    "These are a team of lovely, tireless, brave, patient, and passionate agents!"

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  • 5
    • Scheduling

      4.7
    • Quality

      4.7
    • Cost

      4.4
    • NPS

      4.7
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 250 - 999 employees
    • Miami Beach, FL

    Uassist.ME is a virtual assistance services firm founded in 2009. Based in El Salvador, the team of over 150 employees specializes in non-voice BPO/back office services, voice services, and HR services.

    Clients

    • Facebook
    • Twitter
    • Uber
    • Instagram

    Notable Project

    Uassist.ME provides a remote team to perform administrative and marketing tasks for a property management firm. They interact with clients, close deals, and coordinate digital marketing and content efforts.

    "The quality of the work that their talent delivers is superior."

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  • 6
    • $1,000+
    • 50 - 249 employees
    • Durrës, Albania

    Dalerio Consulting is a consultancy founded in 2017 in Durres, Albania with no more than 10 experts. They specialize in social media marketing, email marketing, and SEO solutions for small and mid-market agencies in the industries of advertising and business services.

    Clients

    • KlimaTek
    • Korrieri

    Industries

    Notable Project

    Dalerio Consulting handles the digital marketing needs of a construction company. Their tasks also include designing and maintaining the client's website.

    "Their communications skills have been flawless."

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  • 7
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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

    Go4Customer provides call center services.

    "The workflow was perfect."

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  • 8
    • $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

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  • 9
    • 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

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  • 10
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.8
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 50 - 249 employees
    • Kyiv, Ukraine

    Wow24-7 is an omnichannel customer outsourcing company based in Kyiv, Ukraine. Founded in 2016, Wow24-7 provides non-voice BPO/back office services and voice services.

    Clients

    • The App Solutions
    • Gita Jewelry
    • StudentShare

    Industries

    Notable Project

    Wow24-7 is the customer support service for an app and web development company. The team handles backend support and answers client calls and chats to explain the development process and estimate costs.

    "Wow24-7 has a perfect understanding of our services."

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  • 11
    • $1,000+
    • 50 - 249 employees
    • Berkeley, CA

    Wing Assistant, a back office outsourcing company, was established in 2018. Their midsize team is located in Berkeley, California. Their services include back office outsourcing, customer service outsourcing, sales outsourcing, call center services, and more.

    Industries

    Notable Project

    Luminary Leaders hired Wing Assistant for a variety of tasks including research, preparing spreadsheets, graphic design, outbound emails and follow-up, appointment scheduling, and website maintenance.

    "I love working with Wing and plan to have a long-term working relationship."

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  • 12
    • 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

    Industries

    Notable Project

    Specialty Answering Service provides scheduling and FAQ support for a public benefit corporation. The team handles registration and scheduling for COVID-19 testing and answers phonecall-directed  FAQs.

    "They're very responsive and we have script updates live within a day, making changes painless."

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  • 13
    • Scheduling

      4.8
    • Quality

      4.9
    • Cost

      4.6
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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 existing content to help a business identify their new direction for their materials. It served as a base for them to modify and distribute across the company. 

    "They really wanted us to be successful and understood our situation."

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  • 14
    • Undisclosed
    • 50 - 249 employees
    • Torreón, Mexico

    Founded in 2014, Remote Team Solutions is an HR services company headquartered in La Laguna, Mexico, with a secondary location in Las Vegas. Their team of around 10 focuses on HR consulting and non-voice BPO/back office services.

    Clients

    • Now Prop Preservation LLC
    • ASI Inc.

    Industries

    Notable Project

    Remote Team Solutions aided a retail tech software company's local recruitment needs. They filled a staffing gap and provided all necessary legal paperwork up to onboarding to support the client's requirements.

    "Their speed in responding to any requests we made and their proactiveness were remarkable!"

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  • 15
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      4.9
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 50 - 249 employees
    • Kyiv, Ukraine

    SalesAR is a B2B lead generation company from Kyiv, Ukraine. Since 2019, their team of 25 employees provides email marketing and content marketing mostly to small businesses in the advertising, IT, and business services industries.

    Clients

    • Vedamo
    • SoftServe Business Systems
    • Pharmax
    • Tricent

    Industries

    Notable Project

    SalesAR provided lead generation services for a modular financial platform. They formed an ideal customer profile, created a content strategy, researched 1,000 contacts monthly, and conducted LinkedIn outreach.

    "We enjoyed their work efficiency, how they delivered reports, and their commitment to learning more about our company."

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  • 16
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      4.5
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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

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  • 17
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      4.8
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 50 - 249 employees
    • Orlando, FL

    Leadium is a voice services firm based in Alexandria, Va., with an additional office in Kiev, Ukraine. Founded in 2016, the team of 100 specializes in email marketing, market research and CRM consulting and SI. They work primarily with small business clients, mostly in the IT industry.

    Clients

    • DirecTV
    • Minted
    • Segment
    • Zadara

    Industries

    Notable Project

    Leadium provides outbound marketing and lead generation, planning a scope of work to increase annual recurring revenue rates.

    “I’m blown away their knowledge of outbound prospecting and lead generation.”

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  • 18
    • $1,000+
    • 250 - 999 employees
    • Los Angeles, CA

    Outsource and Save, a call center company, was launched in 2019. Based in Los Angeles, California, their midsize team offers call center services, back office outsourcing, customer service outsourcing, sales outsourcing, and more.

    Industries

    Notable Project

    Outsource and Save provides telephone operator and customer service for a management service organization. The tasks include inbound and outbound scheduling, insurance verification, and communication services.

    "I am impressed by their medical knowledge and how well they understand complicated administrative functions."

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  • 19
    • $1,000+
    • 50 - 249 employees
    • Sheridan, WY
    Call Masters BPO is a call center company. Launched in 2021, the team focuses on call center services. Their midsize firm is Sheridan, Wyoming-based.

    Industries

    Notable Project

    Call Masters BPO provides call center services, working on increasing the leads coming in for an e-commerce platform. They use RingCentral, Helpscout, and phone calls to contact customers.

    "If there is a problem, they will try their best to fix it right away."

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  • 20
    • Undisclosed
    • 10 - 49 employees
    • Fredericksburg, VA

    Conversational is a voice services company founded in 2003. Located in Fredericksburg, Virginia, the mid-sized team of experienced professional receptionists provides the best possible support for clients in the legal and medical industries, among others.

    Industries

    Notable Project

    Conversational provides call center services for a nonprofit organization. They take messages and forward them to the client's email. The goal is to respond to all inquiries and get accurate information.

    "Their most impressive part is the reliability and promptness of services provided consistently."

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  • 21
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 50 - 249 employees
    • Phoenix, AZ

    Nexa is a virtual assistant agency based in Phoenix. Founded in 1982, their team of around 440 employees focuses on voice services.

    Clients

    • Whitehardt
    • Skupin Law Group
    • Triple A Plumbing & Jetting
    • Baselayer

    Industries

    Notable Project

    Answer 1 provides legal intake services, virtual receptionists, and lead generation to support local and national campaigns for an attorney advertising agency. The collaboration is ongoing.

    "Every team member keeps to a high standard of productivity without sacrificing service quality."

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  • 22
    • $1,000+
    • 1,000 - 9,999 employees
    • Kyiv, Ukraine

    A.R.C.E. is a call center based in Lviv, Ukraine. Founded in 2007, the team of 52 specializes in voice and non-voice BPO/back office services.

    Clients

    • Vodafone
    • VFS.Global
    • CGI
    • BlaBlaCar

    Industries

    Notable Project

    A.R.C.E. Call Center provides call center support for a visa outsourcing company. They're tasked with providing call, email, and chat support to customers.

    "They are high-skilled, responsible, and client-oriented."

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  • 23
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 2 - 9 employees
    • New York, NY

    Leadroot is a New York-based lead generation company. Founded in 2017 with an additional office in the Philippines, the small team of less than 10 provides BPO services, voice services, email marketing, direct marketing, and marketing strategy for its small business and midmarket clients. 

    Clients

    • Woodpecker
    • FatCat

    Industries

    Notable Project

    Leadroot generates leads for a virtual assistant company. They led a cold-calling campaign to create leads and meetings with targeted companies. They also advise on blogs to target. The project is ongoing.

    "I've never worked with a company where I've been so comfortable with what I'm putting in and getting out."

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  • 24
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.8
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 1,000 - 9,999 employees
    • Long Beach, CA

    Located in Washington, District of Columbia and Pasig, Philippines, Boldr is a call center. Launched in 2016, the small team focuses on voice services and non-voice bpo/back office services.

    Notable Project

    Boldr. provides data monitoring and intervention for their client's automated, robotics-based sorting process. They intervene and execute tasks with the robots remotely when necessary, enabling 24/7 support.

    "I love constructive feedback, but I can’t think of anything. They’ve been very supportive and flexible with us." 

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  • 25
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 50 - 249 employees
    • Toronto, Canada

    24H Virtual is a voice and customer service agency based in Toronto with over 10 employees. They specialize in voice services for small and mid-market companies in the fields of transportation, education, and financial services.

    Industries

    Notable Project

    24H Virtual provides ongoing virtual assistance support to an accounting firm with the goal of generating warm leads. They keep track of calls, listen to customer's inquiries, and redirect calls when needed.

    "I’ve been quite happy with their services from the get-go."

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  • 26
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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 provides call center services and outreach for a data modeling company. The team performs inbound and outbound calls, web service and IVR in this 10-year ongoing partnership.

    "They truly want the program to be successful."

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  • 27
    • Scheduling

      4.7
    • Quality

      4.7
    • Cost

      4.3
    • NPS

      4.2
    Read Full Reviews on Clutch Visit Site
    • $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

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  • 28
    • Scheduling

      4.5
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      4.5
    Read Full Reviews on Clutch Visit Site
    • $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

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  • 29
    • $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 LLC provides call center services to a financial firm. They respond to the phone calls, emails, and social media chats of customers. Overall, they answer complaints, requests, and queries.

    "They’re ready to help me any time of the day."

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  • 30
    • Scheduling

      0.9
    • Quality

      4.4
    • Cost

      0.8
    • NPS

      4.4
    Read Full Reviews on Clutch Visit Site
    • 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

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