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PSI
Techstars '21London, GB · Founded 2003 · 73 employees on LinkedIn · 1 known investors
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PSI provides a multichannel sales platform designed for companies selling in local markets through door-to-door and other field sales channels, offering offline capability and compliance-compliant sales experiences. The platform serves field sales teams across 36 countries and processes billions in annual transactions.
Also known as PSI Fusion · PSI Mobile
Founders & leadership
PSI was founded in 2003 by David Costello.
Investors · 1
How we know: the Techstars portfolio · open dataset · Top 3000 Accelerator Startups (no YC) 2026-08 · Not right? Tell us
Company profile
researched Sep 2026PSI is a software company supplying field sales and customer acquisition technology to telecom, broadband and energy/utility providers. Its platform, PSI Fusion, covers the customer journey from lead generation through to sale, installation and activation, combining lead management, territory planning and mapping, appointment scheduling, guided sales journeys, digital forms, compliance controls and reporting in one system. Feature areas cited by the company include routes and campaigns, appointments, data management, workflows, task management, email and payment validations, digital signatures, GPS tracking and integrated invoices, alongside CRM integration.
PSI Fusion is offered in three tiers: Territory Management for field teams focused on lead capture, appointments and rep performance; End-to-End Sales, which adds sales and customer onboarding functionality; and Multichannel Sales, which consolidates field, tele and web sales channels into a single automated backend while allowing each channel its own sales process and customer journey. Packages are also referred to as Leads+, Sales+ and Enterprise. The platform is described as a "fat client" able to operate offline as well as online, allowing reps to complete sales without connectivity and run validations once the connection is restored, and there is no stated limit on the number of daily leads or addresses that can be uploaded. Named customer references include Zzoomm and BeFibre, which used PSI to unify field sales operations after their merger, Energia, and LightSpeed.
Business model
PSI licenses its Fusion software to telecom, broadband and utility organisations under tiered packages (Territory Management/Leads+, End-to-End Sales/Sales+ and Multichannel/Enterprise), with an additional setup fee covering configuration of sales journeys to the customer's requirements. Client support is provided in two forms, Software Support and Agent Support, from an EU-based team available 8am-8pm Monday to Friday and 11am-4pm Saturday (GMT).
Software packages sold at differing tiers plus a one-off setup fee for configuring the platform to a client's brand-specific sales journeys.
Traction
The company reports more than 10,000 users across 36 countries and publishes customer testimonials from telecom and utility field sales operators, including Zzoomm and BeFibre post-merger integration, Energia and LightSpeed.
Latest developments
The leadership team comprises David Costello (Chief Executive Officer and Founder), Frank Egan (Chief Technology Officer), Andy Maslen (Chief Operating Officer), Julia Dobernig (Chief Commercial Officer), Mark Costello (Chief Financial Officer) and Sarah Roberts (Head of Commercial Growth and Marketing), alongside client services, support and engineering staff. Recent published content addresses operational integration in FTTH mergers, managing outsourced field sales teams, and the use of CRM alongside sales execution platforms.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
A specialist vendor of field sales software for the telecom and utility sectors, stating more than two decades in the market and use by more than 10,000 users across 36 countries, and citing telecom and utility providers including Zzoomm, BeFibre, Energia and LightSpeed as customers.
PSI positions itself against generic field sales systems by being purpose-built for regulated telecom and utility field sales, with territory management, compliance controls, audit trails and end-to-end customer journeys designed for those industries, low-code configuration that it says is faster and cheaper than building a bespoke system, offline operation, and industry-specialist implementation support. The company publishes direct comparisons against SPOTIO, Ecanvasser and SalesRabbit.
Technology
PSI Fusion is a low-code/no-code configurable platform: workflows, forms, products and customer journeys can be changed without development projects, and pre-configured templates are used to launch campaigns quickly. The client application is a fat client that works offline as well as online, queuing validations until connectivity returns. Capabilities include territory mapping and route management, GPS tracking, digital signatures, email and payment validation, audit trails and configurable validation for compliance, live dashboards and reporting, and configurable integration with dozens of external systems including CRM.
Go-to-market
Direct enterprise sales driven from the website via demo bookings, supported by customer case studies (Zzoomm and BeFibre, Energia), competitor comparison pages, a published FAQ and pricing information, and a content resource hub covering field sales, data, technology and industry topics. The company also offers consultative help to prospects in building an internal business case and mapping sales or customer journeys.
Telecom, broadband/fibre and energy or utility providers running field sales and multichannel customer acquisition operations, ranging from teams of around five reps to organisations with a thousand or more reps, including outsourced sales agencies.
Geography
Users in 36 countries, with named customer engagements in Ireland and the UK, and a support team based in the EU operating on GMT hours.
History
PSI states it has partnered with telecom and utility organisations for more than 20 years, and its team has over 20 years of experience launching field sales solutions for telco and energy companies. Its current platform is marketed as PSI Fusion, with modules including Fusion Pulse for field reps and Fusion Core for field management teams.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Legal entities · 1
corporate structureCompanies House · registry record
View on Companies House ↗- Registered name
- PSI LIMITED
- Company number
- 07007498
- Status
- Dissolved
- Company type
- Private limited company
- Incorporated
- 2 Sept 2009
- Dissolved
- 15 Nov 2011
- Registered office
- 3rd Floor Lawford House, Albert Place, London, N3 1QA
Current officers
- Stuart Jules Paskin — director, appointed 2 Sept 2009
- Richard Stewart Stalker — director, appointed 2 Sept 2009
Source: Companies House public register · retrieved 24 Jul 2026. Contains public sector information licensed under the Open Government Licence v3.0.
In the news
▸Research sources · 8
primary sources listed
- PSIpsi-mobile.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does PSI do?
- PSI builds field sales and customer acquisition software for telecom and utility providers.
- Who founded PSI?
- PSI was founded by David Costello in 2003.
- Who are PSI's investors?
- PSI's investors include Techstars.
- Where is PSI headquartered?
- PSI is headquartered in London, GB.