Zest4
Zest4 is a UK channel-focused wholesale provider of unified communications, distributing business mobile (O2, EE, Vodafone), IoT connectivity, cloud telephony, cyber security, and compliance services to over 700 UK reseller partners on a wholesale-only basis.
- Company typePrivate
- Founded2013
- HeadquartersWilmslow, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Zest4 does
Zest4 is a UK-based, channel-focused wholesale distributor of unified communications solutions, founded in 2013 and headquartered in Wilmslow, Cheshire. The company exclusively serves UK telecoms, IoT, and mobile resellers, offering access to all three major UK mobile networks (O2, EE, Vodafone), cloud telephony platforms (8x8, CallSwitch One, Gamma), managed IoT connectivity across 545+ networks in 220+ countries, cyber security awareness training, bulk SMS, and PCI-DSS compliance under a single wholesale relationship. Its technology stack is anchored by a suite of partner- and customer-facing portals (Partner Portal, Customer Portal, Zest4 Connect for IoT, Connected Hub white-label portal, TextHub for SMS) plus the Tekton API, enabling real-time provisioning, SIM management, spend controls, and billing across products.
Zest4 generates revenue through wholesale mobile airtime distribution (Reseller and Dealer billing models), recurring cloud telephony licence fees, IoT data subscriptions, per-message SMS charges, and per-SIP-channel or per-user licence fees for cyber security and PCI compliance. Pricing is bespoke and deal-by-deal, with no minimum targets and a focus on recurring revenue streams across the portfolio. The go-to-market is sales-led through dedicated Channel Business Managers, supplemented by industry trade press, LinkedIn, the annual "The Big Ten" partner event, roadshows, and partner referrals.
As of September 2025, Zest4 services more than 700 UK reseller partners, up from over 500 in 2023, and reports an NPS above 70. The company received a strategic investment from Focus Group in January 2023 — explicitly intended to double revenue within two years — while continuing to operate independently under Managing Director Mandy Fazelynia. Its competitive position rests on a channel-only distribution model that never competes with its partners for end customers, aggregated three-network access on a single bill, and a broadening product portfolio that has expanded from mobile and UC into security, compliance, and IoT verticals.
Zest4 firmographics
Firmographics- Name
- Zest4
- Legal name
- Zest4 Group Limited
- Website
- https://zest4.com
- Company type
- Private
- Founded year
- 2013
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Zest4 is a UK channel-focused wholesale provider of unified communications, distributing business mobile (O2, EE, Vodafone), IoT connectivity, cloud telephony, cyber security, and compliance services to over 700 UK reseller partners on a wholesale-only basis.
- Ownership category
- akta.pro rank
Zest4 industry classification
Industry- Product category
- Wholesale Telecommunications Distribution
- NAICS
- Telecommunications Resellers and Agents for Wireless Telecommunication Services (51712), Telecommunications Resellers (517121)
- akta.pro primary industry
- Mobile Wholesale & Roaming Providers (Interconnect, IOT, Roaming Hubs) (HDAIAAAD)
- akta.pro secondary industry
- Mobile Roaming & Interconnect Services (roaming hubs, IREG/TADIG, clearing) (HDAIAEAE)
Keywords
Where Zest4 is headquartered
LocationHeadquarters
- HQ city
- Wilmslow
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Zest4 business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Mobile Airtime Distribution (Wholesale): Zest4 acts as a wholesale distributor of mobile airtime across O2, EE, and Vodafone networks. Under the Reseller Model, partners buy from Zest4, set their own margins, and bill customers directly. Under the Dealer Model, Zest4 bills the customer and pays partners an upfront commission. Revenue is generated through wholesale airtime pricing differentials, with no complex commission reconciliations or revenue-share structures.
- Cloud Telephony Distribution: Zest4 distributes cloud telephony solutions (8x8, CallSwitch One, Gamma, Horizon Contact) to channel partners on a wholesale basis. Revenue is generated through licence fees, recurring platform charges, and per-user pricing passed through from providers, with Zest4 taking a wholesale margin.
- IoT Connectivity: Zest4 provides managed IoT connectivity services with access to 545+ mobile networks across 220+ countries. Revenue is generated through data SIM subscriptions, data usage fees, and device management platform fees, providing partners with recurring revenue opportunities.
- Cyber Security Awareness: Zest4 distributes managed cyber security awareness services (Security Awareness Training & Testing, GDPR Awareness Training, Dark Web Monitoring via CyberSIGHT, Monthly Vulnerability Scanning via V-Scan) to channel partners. Revenue is generated through per-user or per-subscription licence fees.
- Bulk SMS (TextHub): Zest4 offers bulk SMS services through the TextHub platform, enabling partners to provide their customers with mass text messaging capabilities. Pricing starts at 2.5p per SMS, with revenue generated on a per-message (transaction) basis.
- PCI Compliance (PCI Guard): PCI-DSS compliance solution distributed to channel partners with monthly per-SIP-channel licensing and zero transaction fees. Revenue is generated through recurring licence fees from partners.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Bulk SMS from 2.5p per message |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels6 records
Zest4 product offering
Product offeringCore offering
Zest4 is a UK channel-focused wholesale distributor of Unified Communications solutions. It aggregates mobile airtime from O2, EE (via BT Wholesale) and Vodafone, cloud telephony from 8x8, CallSwitch One and Gamma, managed IoT connectivity across 545+ networks, cyber security awareness, PCI compliance (PCI Guard), bulk SMS (TextHub) and the Zest4Tag asset-tracking solution, and sells them on a wholesale basis exclusively to UK resellers and dealers who retain the end-customer relationship.
Product overview
Zest4 is a channel-focused wholesale provider of unified communications solutions for UK resellers. The portfolio spans four core product areas: Business Mobile (wholesale access to O2, EE, and Vodafone UK networks via O2 Business Go, EE Complete, and Vodafone 4 Business, offered under Reseller and Dealer billing models); IoT & Mobile Data (managed global connectivity via 545+ networks, including the Zest4Tag asset-tracking solution and 5G multi-network SIMs for critical connectivity); Cloud Telephony (wholesale cloud communications via 8x8, CallSwitch One, and Gamma, including 8x8 Operator Connect for Microsoft Teams and 8x8 Conversation IQ AI analytics); and Cyber Security & Compliance (Cyber Security Awareness portfolio including SATT, GDPR training, dark web monitoring, and PCI Guard for PCI-DSS compliance, plus Bulk SMS via TextHub). The offering is supported by a suite of partner and customer portals (Partner Portal, Customer Portal, Zest4 Connect for IoT, and The Connected Hub white-label portal) that provide real-time transaction capabilities, self-service management, and reporting. Zest4 operates exclusively through channel partners, offering flexible commercial terms, no minimum targets, and dedicated channel managers.
Differentiator
Problem solved
Functional benefit
Brands
- Zest4 IoT: IoT connectivity solutions provider offering 4G data SIMs with fixed IP, operating over multiple networks globally with partnerships providing services in 220+ countries.
- TextHub
- PCI Guard
- Zest4 Connect
- The Connected Hub
- CallSwitch One
Products and services
- Business Mobile
Quantifiable outcome
- Net Promoter Score exceeds 70 — a level widely recognised as outstanding within the industry
- +4 more outcomes
Companies that use Zest4
Customer profileNamed customers6 records
Ideal customer profiles2 records
Zest4 technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
AI capability5 records
Feature8 records
Zest4 partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core and minor.
- BT WholesalecoreZest4 joined BT Wholesale's Partner Plus Programme, gaining access to the EE network to complement existing O2 and Vodafone offerings. This enables Zest4 partners to access all three major UK networks on a single bill. Zest4 was awarded BT Wholesale Mobile Partner of the Year for its EE proposition. EE's 4G network covers over 88% of UK landmass and its 5G network covers over 75% of the UK population.
- AuditelminorZest4 partnered with Auditel (a leading UK Cost, Procurement & Carbon Solutions Company) as part of Focus Group's journey to achieve carbon neutrality. The partnership provides a framework for carbon auditing and reduction planning.
- O2 BusinesscoreZest4 distributes O2 Business tariffs (O2 Business Go) as a wholesale partner, enabling resellers to offer market-leading, cost-effective mobile plans to their customers.
- EE (via BT Wholesale)coreZest4 distributes EE Complete as a true wholesale model on the EE network (not MVNO), offering genuine EE SIMs with no complicated commission structures or revenue share discounts.
- VodafonecoreZest4 distributes Vodafone 4 Business tariffs, providing reduced rentals, international saver bolt-ons, and lower call rates to multiple destinations for reseller customers.
- 8x8coreZest4 offers 8x8 cloud telephony solutions as a preferred partner, including Operator Connect for Microsoft Teams and Conversation IQ (AI-driven analytics including call transcription, sentiment analysis, and compliance reporting). Zest4 participates in the 8x8 early access programme.
- CallSwitch OnecoreZest4 distributes CallSwitch One, a cloud-native, fully white-label cloud communications platform built for channel partners. Partners can earn £25 cashback per new licence under promotional incentives.
- GammacoreZest4 offers Gamma cloud telephony solutions as part of its preferred partner relationships, providing additional UCaaS options alongside 8x8 and CallSwitch One.
- Global Mobile Network Operators (545+ networks)coreZest4 IoT has strategic partnerships providing managed connectivity services across 545+ mobile networks in over 220 countries globally, enabling private, secure IoT connections worldwide.
- Cyber Security Awareness (CSA)coreZest4 distributes Cyber Security Awareness products including Security Awareness Training & Testing (SATT), GDPR Awareness Training, CyberSIGHT Dark Web Monitoring, and V-Scan Monthly Vulnerability Scanning. CSA is a fully managed, UK-based cyber security awareness service supporting over 26 languages.
- Microsoft (Operator Connect)coreZest4 participates in 8x8's Operator Connect for Microsoft Teams programme, enabling PSTN calling through Microsoft Teams Phone. Direct peering through Microsoft Azure provides reliability and streamlined SLA with Microsoft.
Scale indicators6 records
Recent moves7 records
Expansion highlights5 records
Zest4 competitors and assessment
Company assessmentDirect peers
- Virtual1: Virtual1 (formerly TalkTalk Business) is a UK wholesale-only network and communications provider serving channel partners with connectivity, voice and cloud services. Like Zest4, it sells exclusively through resellers, making it a direct model and channel competitor.
- Daisy Communications: Daisy is a major UK channel-focused communications provider offering mobile, hosted telephony, connectivity and IT services through a partner programme. It competes head-to-head with Zest4 for UK resellers across mobile airtime and UCaaS distribution.
- Spitfire Network Services: Spitfire is an independent UK channel-focused ISP and telephony provider serving business resellers with connectivity, hosted voice and mobile services. It targets the same independent reseller segment as Zest4.
- Gamma plc: Gamma is a leading UK wholesale provider of unified communications, SIP trunking, hosted telephony and mobile services to channel partners. Zest4 distributes Gamma cloud telephony as one of its preferred vendors, but Gamma also competes for the same reseller base with direct wholesale propositions.
- Pangea Connected: Pangea is a UK-based MVNO and mobile/IoT data connectivity provider with a strong channel partner programme. It directly overlaps Zest4 on wholesale mobile and IoT SIM distribution to UK resellers.
Broad incumbents
- Focus Group: Focus Group is Zest4's parent company and a broader UK business communications and IT services provider with direct end-customer sales. Its scale and breadth make it a broad incumbent relative to Zest4's narrower wholesale-only focus.
- BT Wholesale: BT Wholesale operates the Partner Plus Programme through which Zest4 accesses the EE network. As a major UK wholesale carrier, BT Wholesale sets the terms of Zest4's EE proposition and could compete for the same resellers through alternative programmes.
- 8x8: 8x8 is a global UCaaS and CCaaS platform whose cloud telephony portfolio Zest4 distributes to UK channel partners. As a large platform vendor, 8x8 could increasingly bypass wholesale partners and sell direct to UK resellers or end customers.
Emerging players
- Onecom: Onecom is a large UK mobile and unified communications reseller and a named Zest4 partner. As one of the channel's larger players with direct MNO relationships and own-brand propositions, it sits between Zest4 (pure wholesaler) and direct competitors.
- CallSwitch One: CallSwitch One is a UK cloud-native, white-label communications platform that Zest4 distributes with a £25 cashback promotion. As a smaller, partner-built UCaaS platform, it competes with broader UCaaS distributors on channel terms.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Zest4 social profiles
Digital presenceZest4 financial estimates
Financial estimateRevenue estimate
Valuation estimate
Zest4 leadership team
Management profileNumber of profiles
Profiles9 records
Zest4 funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Zest4 M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Zest4
What does Zest4 do?
Zest4 is a UK channel-focused wholesale distributor of Unified Communications solutions. It aggregates mobile airtime from O2, EE (via BT Wholesale) and Vodafone, cloud telephony from 8x8, CallSwitch One and Gamma, managed IoT connectivity across 545+ networks, cyber security awareness, PCI compliance (PCI Guard), bulk SMS (TextHub) and the Zest4Tag asset-tracking solution, and sells them on a wholesale basis exclusively to UK resellers and dealers who retain the end-customer relationship.
Is Zest4 a public or private company?
Zest4 is a private company. It is classified as corporate owned and is currently operating.
When was Zest4 founded?
Zest4 was founded in 2013. It employs 11 to 50 people.
Where is Zest4 based?
Zest4 is headquartered in Wilmslow, United Kingdom, in the Europe region.
How does Zest4 make money?
Six revenue lines are on record. Mobile Airtime Distribution (Wholesale) is the primary driver. The others are cloud Telephony Distribution, ioT Connectivity, cyber Security Awareness, bulk SMS (TextHub) and PCI Compliance (PCI Guard).
Who are Zest4's main competitors?
Direct peers on record are Virtual1, Daisy Communications, Spitfire Network Services, Gamma plc and Pangea Connected. Broad incumbents are Focus Group, BT Wholesale and 8x8. Emerging players are Onecom and CallSwitch One.
Does Zest4 have an API?
No public API is recorded for Zest4.
What industry is Zest4 in?
Zest4's product category is Wholesale Telecommunications Distribution. Its primary akta.pro industry code is HDAIAAAD, Mobile Wholesale & Roaming Providers (Interconnect, IOT, Roaming Hubs), with a secondary code of HDAIAEAE, Mobile Roaming & Interconnect Services (roaming hubs, IREG/TADIG, clearing). Its NAICS code is 51712.