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Top System Integration in London

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System Integration Providers
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Looking for the best system integration company in London? UpCity compiles authentic reviews, company descriptions, project examples, and more into a list for you to review. Feel confident you're finding the top provider for your business.

UpCity offers objective, independent research and verified user reviews. We earn compensation from some providers who sign up for sponsored profiles. Learn more about our trusted providers.

Location
Any/All Available
Provider's minimum per-project cost
Any/All Available
$25,000 or more
Provider's minimum retainer cost
Any/All Available
$5,000 or more, monthly
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Businesses provider works with
Any/All Available
Small Businesses: 1–250 employees
Medium Businesses: 251–999 employees
Enterprise Businesses: 1000+ employees
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2 Provider(s)Last Updated: October 28, 2025
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Zazz

London, ENG, GB + 1 More Location
5.0 | 1 review
Last reviewed on 9/8/2025
Zazz is a trusted software engineering and IT services partner helping enterprises deliver secure, scalable, and high-impact technology initiatives. We Solve complex enterprise challenges - legacy bottlenecks, technical debt, talent shortages, compliance risks, and system fragmentation.
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Businesses provider works with
Works with
Small, Medium, Enterprise
Provider's minimum per-project cost
Per-project minimum
$25,000 or more
Provider's minimum retainer cost
Retainer minimum
$5,000 or more, monthly
Provider updated information on 9/8/2025
Services Offered
Enterprise Resource Planning (ERP)Big Data & Business IntelligenceManaged Service ProvidersIT ServicesSystem IntegrationView All Services (32)
VISIT WEBSITE Visit Profile
Ritik Vishwakarma — Manager GTM Strategy
Zazz has been a pivotal IT Managed Services Partner for us, we have been struggling to manage helpdesk tickets and support. They have been able to bring our ticket volumes for 250 per week to 30-40. Critical issues have gone down significantly. Will highly recommend Zazz IT Managed Services
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AvISO is an award winning ISO consultancy, based in London. Specialising in industry led management training for ISO 9001, ISO 14001, ISO 50001, Integrated (PAS:99) management systems. We serve the capital, Kent and South East UK.
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Provider updated information on 2/14/2025
Services Offered
System Integration
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