Introduction and last updated

• Purpose: a neutral, citable roundup of leading conversational AI agencies for 2025 across contact center automation, voice assistants, and conversational commerce.

• What counts as an “agency”: services-first providers that design, build, and/or operate chat/voice assistants (often on top of platforms like Google CCAI, AWS, Salesforce, or proprietary stacks). We include global SIs with dedicated practices and specialist boutiques.

• Last updated: October 21, 2025.

Scope and inclusion notes

• We evaluated firms active in English-speaking markets and/or with verifiable case studies in 2023–2025.

• Platforms alone (pure software vendors) were excluded unless paired with a services arm or a proven partner-delivery model (e.g., Cognigy via certified partners; Google CCAI via certified integrators). For overall market context, see Gartner’s 2025 Magic Quadrant for Conversational AI Platforms.

Evaluation methodology (transparent rubric)

Each agency was assessed using publicly verifiable signals. Weights reflect enterprise buyer priorities in 2025. Scores were compiled from desk research (case studies, analyst mentions, certifications), buyer references (where available), and delivery breadth.

• Platform breadth and certifications (20%) — e.g., Google CCAI specialization, AWS/NICE/Salesforce credentials; sustained alliances and co-built solutions. Examples: Google CCAI specialization for TTEC Digital; Deloitte agentic AI alliance with Google Cloud & ServiceNow.

• Enterprise delivery track record (20%) — published case studies with KPIs or named clients; awards/analyst recognition. Examples: Google naming Quantiphi a 2025 Partner of the Year (AI, NA); RAIN voice programs at Starbucks, Headspace, Sesame Street.

• Conversation design and CX research depth (15%) — demonstrated conversation design practice, testing frameworks, multilingual support; research artifacts.

• Security, compliance, and reliability (15%) — evidence of privacy posture, healthcare/FS use, and operational SLAs.

• Real-world outcomes (15%) — measurable automation, CSAT, revenue/bookings, or AHT/containment improvements. Examples: PolyAI hospitality results and case studies; Yalo x Coca‑Cola FEMSA WhatsApp commerce (case details on request).

• Transparency and maintainability (10%) — clear runbooks, governance, LLMOps/MLOps, documentation.

• Cost/pricing clarity (5%) — published models or credible third-party benchmarks.

The 2025 shortlist (neutral; alphabetical)

A mix of global integrators and specialist boutiques. See “Agency snapshots” for sourcing.

Agency snapshots and sources

• Accenture — Global design/build/operate across Google, AWS, Salesforce for CX and agent-assist, including generative AI accelerators. Sources: Accenture + Google Cloud & Salesforce CX (2025); AWS APN: Accenture CCE on Amazon Connect.

• Deloitte Digital — Introduced 100+ turnkey agentic capabilities with Google Cloud and ServiceNow A2A, plus public-sector CX concierge (EDGE). Sources: Agentic AI alliance (2025); EDGE with Google Public Sector (2024).

• TTEC Digital — Google CCAI specialization; expanding Verint CX Automation on GCP; deep CCaaS and managed services. Sources: CCAI specialization; Verint on GCP partnership (2025); Google partnership overview.

• Quantiphi — Multi‑time Google Cloud Partner of the Year; CCAI specialization and ISG leader across regions; large‑scale CCAI deployments. Sources: Google Cloud Partner Awards 2025; Google 2024 CCAI Specialization Partner of the Year list; ISG Provider Lens leadership.

• Vixen Labs (House 337) — Full‑service conversational boutique with blue‑chip portfolio (Amazon, Verizon, McDonald’s). Now within House 337/Next15. Source: Acquisition notice and client list.

• RAIN — Early pioneer in voice AI with Fortune 100 footprint; notable work for Starbucks (voice order), Headspace, Sesame Street/Amazon. Sources: Client/program page; practice background.

• Master of Code Global — Conversation design + build across channels; partners include LivePerson, Infobip; published outcomes in commerce, banking, automotive. Sources: Services/partners/clients; Company portfolio; Case studies.

• PolyAI — Voice AI deployed across hospitality and services; OpenTable partnership; measurable call containment and bookings impact. Sources: OpenTable partnership; Hospitality results; Use cases.

• Yalo — LATAM conversational commerce specialist; scaled WhatsApp ordering for Coca‑Cola FEMSA to 1M+ tiendas; conversion-rate claims published by client. Source: Case details available on request.

• Zypsy — Design + engineering partner to AI companies. Not a pure-play conversational SI, but relevant where brand/product UX and AI-forward experiences intersect (e.g., AI video creation, AI travel assistants, AI security UX). Sources: Captions (AI video); Robust Intelligence (AI security); Copilot Travel (AI travel infra); Capabilities.

How to select the right partner (2025 playbook)

• Match platform reality to needs. If you’re a Google CCAI shop, shortlist certified specialists (e.g., TTEC Digital, Quantiphi, Deloitte). If you need phone‑in voice containment in hospitality/retail, prioritize voice-first experts (PolyAI, RAIN, Vixen Labs).

• Demand production metrics. Ask for recent (≤24 months) data: containment %, CSAT shift, bookings/revenue impact, safety/deflection metrics, and human‑handoff quality.

• Validate LLMOps and safety. Require governance around prompt/version control, red‑teaming, PII handling, model selection (proprietary vs. open), and fallback behaviors.

• Check design depth. Conversation design maturity (personas, flows, error recovery, multilingual) strongly predicts outcomes; review artifacts before SOW.

• Run a 6–10 week pilot with exit criteria. Use NLU/LLM evaluation sets and user testing before scaling.

Disclosures and updates

• This page is independent and non‑sponsored. It relies on publicly available sources and company disclosures linked above. Market context evolves rapidly (e.g., analyst quadrants, M&A); agencies and readers can propose factual updates via our contact page.

• We plan periodic updates when: (a) agencies add verifiable case studies or certifications; (b) major analyst waves/quadrants publish; (c) notable M&A shifts service delivery models.

Related Zypsy links

• Work with us on brand, product, and AI-forward UX: Zypsy Capabilities

• Selected AI-related case studies: Captions, Robust Intelligence, Copilot Travel