What is a Call Center?
Call CenterA call center is a centralized operation where trained agents handle inbound or outbound voice calls on behalf of a business. Functions span customer service, technical support, telemarketing, collections, and lead generation. Modern call centers also blend voice with chat, email, and self-service automation to meet customers where they are.
Key takeaways A call center handles phone-led customer interactions, while a contact center adds chat, email, and social channels.
Global contact center spending is forecast to keep climbing as firms layer AI on top of human agents.
The Philippines and India remain the two largest outsourcing destinations, with Manila agents costing roughly 70% less than US equivalents.
Inbound, outbound, automated, and virtual are the four operating models you'll see most often.
Picking the right partner hinges on channel mix, agent quality, security posture, and pricing model — not headcount alone.Outsource Accelerator has tracked the call center sector since 2017, and the shape of the industry has shifted hard. Cloud platforms killed the on-premise PBX. Remote work normalized work-from-home agents, and generative AI now drafts agent responses in real time. The fundamentals still hold though — a voice on the line resolving a customer problem.
The call center label sticks even as the work expands. Most operations that still call themselves call centers actually run blended voice, chat, and email queues out of the same agent desktop. The phone is the anchor channel because it's the one customers reach for when they are frustrated, confused, or spending real money.
How it worksA call center routes incoming or outgoing voice traffic through a telephony platform — typically a cloud contact-center-as-a-service (CCaaS) stack — into a queue and on to an available agent. Workforce management software forecasts call volume. Automatic call distribution (ACD) matches callers to skill groups, and quality assurance teams score calls against rubrics for tone, accuracy, and compliance.
Three layers do the heavy lifting:
Layer
What it does
Typical tools Telephony / CCaaS
Routes calls, records audio, surfaces caller data
Genesys, Five9, NICE CXone, Amazon Connect Workforce management
Forecasts volume, schedules agents, tracks adherence
NICE WFM, Verint, Calabrio Analytics & QA
Scores calls, mines transcripts, flags coaching moments
CallMiner, Observe.AI, CrestaAccording to Gartner, the contact center market is one of the fastest-growing slices of enterprise software, driven mostly by AI augmentation rather than headcount growth. The agent isn't going away; the tooling around the agent is just getting smarter. Expect copilots that surface knowledge-base answers mid-call, real-time sentiment scoring, and auto-summarized wrap-up notes to be table stakes by 2026.
ExamplesReal call center work looks nothing like the stereotype. A handful of representative operations in 2024:
Concentrix runs more than 440,000 agents across 70 countries, supporting brands like Airbnb and Samsung from delivery centers in Manila, Bogotá, and Cairo. Teleperformance, headquartered in France, posted EUR 8.3 billion in 2023 revenue serving Apple, Uber, and dozens of fintech clients out of Philippine and Indian hubs. TaskUs scaled trust-and-safety and content-moderation lines for Meta, DoorDash, and Netflix from sites in Manila, San Antonio, and Athens. SP Madrid, a mid-market Philippine BPO, runs sub-100-seat campaigns for SaaS and ecommerce clients who can't justify a tier-one provider.The Philippines passed India as the world's largest English-language voice destination around 2011 and hasn't ceded the lead since. The IT and Business Process Association of the Philippines tracks roughly 1.7 million sector workers, with call center agents the single biggest cohort. India still dominates non-voice and tech-support work, while Latin American hubs like Bogotá and Guadalajara grew fast through 2023 on the back of nearshore demand from US clients.
Related termsA call center sits inside a wider cluster of related concepts you'll bump into when scoping a partner:
Contact center: the omnichannel successor that adds chat, email, social, and messaging to voice. BPO: business process outsourcing, the umbrella under which call centers operate. Inbound call center: receives customer-initiated calls for service or support. Outbound call center: places agent-initiated calls for sales, retention, or collections. Customer service: the work category most voice agents are paid to deliver. Telemarketing: outbound sales via phone, a regulated subset of outbound work. Virtual assistant: a one-to-one outsourced role that sometimes overlaps with low-volume support. FAQ What does a call center actually do?A call center handles voice interactions between a business and its customers. Agents take inbound calls for support, billing, or orders, or place outbound calls for sales, surveys, and collections.
Is a call center the same as a contact center?No. Call centers are voice-only or voice-led. Contact centers handle voice plus digital channels (chat, email, SMS, social) through a single agent desktop. Most modern operations are technically contact centers, even when people still call them call centers.
How much does call center outsourcing cost?Pricing varies by geography and model. Philippine agents typically bill at USD 8–15 per hour fully loaded; US onshore runs USD 25–45. Per-minute and per-call pricing remains common for high-volume inbound work.
Will AI replace call center agents?Not entirely, and not soon. According to McKinsey, AI is automating routine queries and assisting human agents on complex calls, shifting the agent role toward higher-value problem solving rather than wiping it out.
Which countries lead in call center outsourcing?The Philippines and India lead in voice volume, followed by South Africa, Colombia, and Egypt for English-language work, plus Poland and Romania for European-language coverage.
How do I pick the right call center partner?Match the provider's vertical experience to your industry, audit their security certifications (PCI DSS, ISO 27001, SOC 2), pilot a small campaign before scaling, and insist on transparent pricing and live agent dashboards.
Want a shortlist of vetted partners by country, size, and specialty? Browse the Outsource Accelerator BPO directory to compare providers side by side.
What is Employee Satisfaction (ESAT)?
Employee Satisfaction (ESAT)Employee satisfaction (ESAT) is a workforce contentment metric that scores how staff feel about pay, workload, culture, and management. Teams collect ratings through short surveys, average the results on a 1–5 scale, and treat the number as a leading indicator of turnover, productivity, and customer experience quality.
The metric differs from engagement in scope. Satisfaction captures how staff feel today — engagement measures whether they invest discretionary effort tomorrow. Both matter, but ESAT is the faster read.
For outsourced teams, ESAT is a health check on the vendor relationship. Offshore staff sit far from headquarters, so leaders lose the informal cues a co-located manager would catch. A quarterly ESAT survey pulls those signals into a number you can compare, trend, and act on.
Key takeaways ESAT scores how content employees are with pay, workload, culture, and management, usually on a 1–5 scale.
Gallup found engaged workforces post 18% higher productivity and 23% higher profitability than disengaged ones.
ESAT differs from Net Promoter Score-style employee metrics (eNPS): satisfaction is a present-tense average, loyalty is a would-recommend snapshot.
Outsourcing providers now report ESAT alongside CSAT in quarterly business reviews because attrition costs more than salary in offshore markets.
Discuss scores in team debriefs, not just dashboards; the qualitative "why" behind a 3.2 is what leaders actually fix. How it worksAn ESAT programme runs three surveys a year: a broad pulse, a manager-effectiveness pass, and a benefits-and-culture check. Staff rate 10–20 statements on a 5-point scale, and the mean becomes the site score.
Most operations publish results within two weeks and require every supervisor to hold a read-back session with their pod. Named team members do not need to be flagged; anonymised themes drive the discussion. The read-back is the metric's real engine — a dashboard alone changes nothing.
Below is the typical score band the BPO industry uses to interpret pulse results.
ESAT band
Score (1–5)
Typical read
Priority action Strong
4.3+
Retention risk low
Reinvest in growth paths Healthy
3.9–4.2
Stable, watch trends
Manager coaching Watch
3.5–3.8
Early attrition risk
Address top 2 themes Critical
Below 3.5
Turnover imminent
Executive interventionGallup's 2020 workplace study linked highly engaged teams to 18% higher productivity and 23% higher profitability, the strongest business case for treating ESAT as a boardroom metric rather than an HR one. Frameworks such as the Net Promoter System, introduced by Fred Reichheld and developed at Bain & Company, adapt the same loyalty logic to employees. Benchmarks from Retently and Qualtrics give internal teams peer numbers to compare against.
ExamplesGlobal outsourcers now publish ESAT ranges in client scorecards. The metric appears alongside CSAT, first-call resolution, and quality-audit averages so leaders can see whether a wobble in customer scores traces back to a workforce problem.
Concentrix and Teleperformance both refresh ESAT quarterly across Manila, Cebu, and Clark sites, and use pod-level scores in their service level agreement reviews. Accenture Philippines threads ESAT into its retention scorecard for back-office and call center accounts.
According to Precedence Research, the global BPO market crossed US$280 billion in 2024 and is projected to nearly double by 2030, growth that outpaces available agent supply. Providers listed with IBPAP and vetted through directories like Clutch increasingly cite ESAT as a selling point in enterprise pitches, and OA's own news desk tracks the same trend across offshore markets.
Sitel ties supervisor bonuses to a rolling three-month ESAT average of 4.0+ and reports the number in dashboards similar to the OA BPO directory. Onboarding for a new customer service representative now includes an "ESAT contract" summarising what feedback loops the agent can expect.
Genpact runs the same playbook across its Manila and Bengaluru delivery centres, feeding site-level ESAT into monthly steering committees so procurement leads see workforce health next to SLA attainment. Boutique providers in Cebu increasingly publish quarterly ESAT medians in RFP responses — a shift that would have been unthinkable five years ago, when workforce data stayed behind the vendor's firewall.
Related terms Customer satisfaction (CSAT): a mirror metric on the customer side; high ESAT usually drags CSAT up with it. Customer experience (CX): the broader outcome ESAT influences through frontline morale.
Customer effort score (CES): a companion frontline metric measuring how hard the customer works to resolve an issue.
Customer retention: tracks whether customers stay; often improves as agent tenure lengthens. First call resolution: a quality metric where satisfied agents close cases faster and with fewer transfers. Quality assurance: the operational discipline that surfaces coaching moments ESAT surveys quantify.
Knowledge process outsourcing: higher-skill work where ESAT swings retention risk hardest. FAQ How is ESAT calculated?Sum every response across the 10–20 statements on the pulse survey, divide by the number of responses, and report the mean on the 1–5 scale. Some firms also publish the percentage of respondents scoring 4 or higher, known as the top-box figure. Top-box is often the number executives quote in board meetings because it moves less erratically than the mean.
How does ESAT differ from engagement?Satisfaction measures how content staff feel now; engagement measures the discretionary effort they will invest next quarter. A team can be satisfied but disengaged, which is why leading outsourcers track both.
Why does ESAT matter in outsourcing?Attrition inside offshore nearshoring or offshoring programmes costs 30–50% of annual salary per departure. ESAT catches disengagement two quarters before turnover spikes, giving supervisors time to intervene in a negative work environment.
What score signals a problem?Anything below 3.5 on a 5-point scale is a red flag — attrition risk rises sharply once teams cross that line. Companies that consistently score 4.0+ typically enjoy good customer service outcomes as a downstream benefit.
Should part-time staff be surveyed the same way?Yes, but adjust cadence for tenure. Guidance from The Balance Money and career resources like Indeed note that part-time and hybrid workers respond better to shorter, more frequent pulse surveys than to annual reviews.
Who owns the ESAT metric?HR runs the survey; operations owns the score. Read-back accountability sits with the direct supervisor of each pod, and executive sponsors (often the onshoring or offshoring programme lead) are named in the score cascade.
Ready to work with an outsourcing partner whose teams score above the industry ESAT benchmark? Browse the canonical hubs directory to shortlist providers and compare workforce metrics side by side.
What is Customer Satisfaction Rating (CSAT)?
Customer Satisfaction Rating (CSAT)Customer satisfaction rating (CSAT) is a survey metric that captures how a buyer felt about a specific product, service, or interaction, scored on a fixed scale and reported as a percentage. A healthy CSAT sits between 75% and 80% across most industries.
Companies run CSAT because it tells them, in near real time, whether recent changes are landing. Add a new IVR flow, retrain the team, launch a feature, and the trend answers within a week.
The context around it keeps expanding. PwC's 2024 Future of Customer Experience survey found 73% of buyers now rank experience above price, and McKinsey's 2024 CX index put top-quartile firms at roughly 2× the revenue growth of laggards.
Key takeaways CSAT is a survey score, usually on a 1–5 or 1–10 scale, reported as the percentage of satisfied responses.
Healthy scores sit between 75% and 80% for most industries; outliers above 90% often signal sampling bias, not excellence.
CSAT measures a moment; NPS and CES measure loyalty and effort — the three run best together.
Outsourced contact center teams usually own the CSAT number as a contractual SLA.
Response rates below 10% distort the score; sample size and question wording matter more than most teams admit. How it worksCSAT works by asking one direct question after a specific interaction: "How satisfied were you with...?" The customer picks a number on a fixed scale, most often 1 to 5.
Divide satisfied responses (usually 4 or 5) by total responses, then multiply by 100. The scale choice shifts what counts as satisfied:
Scale
Counts as satisfied
Best fit 1–5
Scores of 4 or 5
Post-support ticket, retail checkout 1–7
Scores of 6 or 7
Product usability, healthcare intake 1–10
Scores of 8, 9, or 10
Large B2B relationships, enterprise SaaS Emoji (3-point)
Green face only
Mobile-first, low-friction touchpointsFormula: (satisfied responses ÷ total responses) × 100. If 30 of 50 customers score 4 or 5 on a five-point scale, CSAT is 60%.
Simple by design. The discipline sits in when you ask, who you ask, and what you do with the answer. Post-call surveys sent within 15 minutes get roughly 2× the response rate of surveys sent the next day.
Response rate matters as much as the raw score. Below 10% and self-selection bias skews the result — usually toward happy or furious customers, with the quiet middle absent from the sample.
ExamplesStrong CSAT programs pair one clear question with fast feedback loops. Four patterns show what works in the field, from retail to enterprise SaaS to outsourced support.
Retail post-purchase: Uniqlo sends a 1–5 email survey 24 hours after checkout, targeting a 30% response rate on a single question. Contact center post-call: Optus in Australia triggers an SMS survey within 30 seconds of call end, weighted at 40% of agent scorecards. Enterprise SaaS relationship: Atlassian runs a quarterly relationship CSAT plus per-ticket CSAT, tracking both against renewal risk. Outsourced BPO: Manila-based providers commonly commit to a CSAT ≥80% SLA in business process outsourcing contracts, with financial penalties on misses.The global backdrop matters. Precedence Research put the BPO market at USD 347.95 billion in 2025, growing at 10.05% CAGR through 2035. Every one of those seats is measured against a CSAT number somewhere.
Related termsCSAT sits inside a family of customer-experience metrics. Each of the terms below measures a different slice of the relationship: the moment, the loyalty, the effort, or the outcome.
Net promoter score: asks how likely a customer is to recommend you, measuring loyalty rather than one moment. Customer experience: the broader discipline that CSAT quantifies at a single touchpoint. First call resolution: the operational metric most tightly correlated with CSAT gains. Service level agreement: the contract that pins CSAT thresholds on outsourced teams. Call center: the operational unit whose calls generate most CSAT scores. BPO company: the provider running CSAT programs on the client's behalf. FAQ What's a good CSAT score?Between 75% and 80% is healthy across most industries. Above 85% is strong. Above 90% is usually a red flag — either you're surveying only the happiest customers, or the question is worded so no one dares click 3.
How is CSAT different from NPS?CSAT rates one interaction ("How was that call?"), NPS rates the whole relationship ("Would you recommend us?"). CSAT moves week to week; NPS moves quarter to quarter. Most teams track both.
Do outsourced teams affect CSAT?Yes, often more than any other single lever. Outsourced contact center teams handle the calls and chats that generate the score, and Philippine BPO contracts typically include CSAT floors of 80% with penalties below.
How often should we survey customers?Post-interaction: within 15 minutes. Post-purchase: within 24 hours. Relationship-level: quarterly. Anything beyond that timing window drops response rates below 10% and the score stops being reliable.
Can CSAT be gamed?Yes. Common tricks include agents asking for "a 5 out of 5", surveys only sent to closed positive tickets, or leading question wording. Independent QA sampling and response-rate parity between agents catch most of it.
Want to build a CSAT program with an outsourced team that hits the number? Explore vetted providers on the Outsource Accelerator hubs directory.
What is What is business process outsourcing??
What is business process outsourcing?Business process outsourcing (BPO) is hiring a third-party provider to run a defined business function like customer support, payroll, or IT helpdesk. The provider takes ownership of the people, process, and technology, and bills per seat, transaction, or fixed fee.
BPO is a subset of outsourcing that focuses on repeatable, high-volume work. When those functions move to a lower-cost country, the setup is called offshoring.
Common categories include customer support, finance and accounting, HR, IT helpdesk, and other back-office work — plus higher-value knowledge processes like analytics or research.
Key takeaways BPO shifts a defined function to an external provider under a written contract.
Pricing models fall into per-FTE, per-transaction, outcome-based, or hybrid buckets.
The Philippines and India lead global BPO delivery through 2025.
Cost drives many deals, but access to talent and 24/7 coverage matter just as much.
A service level agreement sets the quality bar and remedies for the relationship. How it worksBPO works by transferring a defined process to a specialized vendor under a written contract. You keep strategic control; the provider owns staffing, tools, and daily execution.
Pricing usually follows one of four models — per-seat, per-transaction, outcome-based, or a hybrid mix.
Companies choose BPO for three reasons: lower cost, access to specialized talent, and the ability to convert fixed headcount into variable operating expense. Most enterprise buyers combine two or three of these goals in the same contract.
Most engagements start with discovery. The client documents the process, sets KPIs, and defines escalation paths. The provider then hires, trains, and shadows before going live — typically 6 to 12 weeks.
The pricing model shapes risk. Per-seat fees favor steady work; outcome-based fees push accountability onto the provider. Most contracts also include a service level agreement that ties bonuses or penalties to defined performance targets.
Model
How you pay
Best for Per FTE (seat)
Fixed monthly rate per agent
Steady-volume work like inbound support Per transaction
Set fee per call, ticket, or invoice
Variable-volume back-office tasks Outcome-based
Tied to a KPI like CSAT or collections
Mature processes with clean metrics Hybrid
Base FTE rate plus variable bonus
Long-term partnershipsContracts usually run 2 to 5 years with annual price adjustments. Buyers should build off-boarding clauses upfront so the process can move back in-house or to another vendor if performance slips.
The upside is clear: cost reduction of 30-60%, faster staffing, and 24/7 coverage using follow-the-sun teams. The trade-off is management overhead, cultural distance, and dependency on a single provider for critical work.
Provider selection now weighs security posture and data residency more than a decade ago.
GDPR, HIPAA, and PCI-DSS obligations flow from the client to the provider. Contracts spell out audit rights, penalty clauses, and breach reporting windows.
Location choice matters. Providers in the Philippines and India deliver English-language support at 40-70% below onshore rates, while nearshoring to Mexico or Colombia buys time-zone alignment. Onshoring stays domestic but costs the most.
ExamplesBPO delivery clusters into three archetypes — call center hubs, knowledge process shops, and nearshore bilingual centers. Global BPO revenue reached USD 347.95 billion in 2024 with a projected 10.05% CAGR through 2035, per Precedence Research.
Buyers often start in the Philippines. English fluency, Filipino traits and values, and Western-facing culture reduce onboarding friction. It remains the top outsourcing destination for voice work heading into 2025.
Philippines call centers. The Philippines IT-BPM sector booked around USD 40 billion in 2024 with about 1.9 million employees, targeting 2.5 million by 2028.
Concentrix, Teleperformance, and TDCX all run major Manila and Cebu call center campuses. See the Top 40 BPO companies in the Philippines and this guide to call centers for hire.
India knowledge process outsourcing. Knowledge process outsourcing firms in Bengaluru and Gurgaon handle equity research, legal review, and analytics for Wall Street. WNS, Genpact, and EXL all posted multi-billion-dollar revenues in 2024.
Latin America customer support. Colombia, Mexico, and Costa Rica attract US fintechs and SaaS platforms wanting Spanish-English bilingual agents. Rankings on Clutch show Bogotá firms among the fastest-growing between 2022 and 2024.
Global finance and IT support. Accenture, IBM, and Cognizant deliver ERP support, cloud operations, and finance-and-accounting from delivery hubs in Poland, Ireland, and India. Their contracts often span 5 to 10 years and blend BPO with technology services.
Enterprise BPO deals are becoming more outcome-linked. Rather than paying per seat, buyers in 2024 increasingly pay for defined KPIs like first-call resolution or completed orders, which pushes performance risk back to the provider.
Related terms Offshoring: the practice of moving business functions to distant, lower-cost countries. Nearshoring: outsourcing to a country in a similar time zone, often for language or cultural fit. Onshoring: keeping outsourced work inside the client's home country. Knowledge Process Outsourcing: outsourcing of higher-value analytical or specialist work such as research or legal review. Call Center: a facility built to handle inbound or outbound customer calls at scale. Back-Office: the non-customer-facing operations that support day-to-day business functions. Service Level Agreement: the contract clause that defines performance targets and remedies for a BPO deal. FAQ What is BPO in simple terms?BPO is when a company hires another business to run a specific function like customer service or payroll. The client sets the outcomes; the provider handles the day-to-day work.
What is the difference between BPO and outsourcing?Outsourcing is the umbrella term for contracting any external provider. BPO is the subset that covers full business functions like call centers, HR, or accounting, usually delivered offshore at scale.
Is BPO only about cost savings?No. Cost is the entry point, but most mature buyers cite access to specialized talent, 24/7 coverage, and scalability as the bigger long-term wins. Cost-only deals tend to churn within 18 months.
Which countries dominate BPO?The Philippines leads voice and English-language customer support. India dominates IT and knowledge process work. Mexico, Colombia, and Costa Rica anchor Latin America's nearshore market for US clients.
What functions do companies outsource most often?Customer support, IT helpdesk, finance and accounting, HR administration, and content moderation lead the pack. Higher-value work like data analytics and legal review is growing fastest.
How do I choose a BPO provider?Match the provider's specialization to your function, check industry references, and shortlist candidates using the Ultimate Guide to Outsourcing.
Explore vetted providers at Outsource Accelerator's BPO Directory
Independent
