Application Performance Monitoring · London
Application Performance Monitoring in London
Instrumenting London organisations' applications so slow and failing requests can be traced to a cause. The constraint nobody mentions at purchase is cost: these tools price on data volume, and a thorough instrumentation left unmanaged produces bills that arrive as a genuine shock.
Why this comes up
The problem
Users report the application being slow, the servers look healthy, and diagnosing it means adding logging and waiting for it to happen again.
What you get
What we deliver
- Tracing across services, so a slow request can be followed to where the time went
- Database queries surfaced, since these dominate most application slowness
- Errors grouped and prioritised by how many users they affect
- Sampling configured to keep cost proportionate to the value of the data
- Attribute cardinality controlled, as unbounded values drive both cost and slowness
- Alerts based on what users experience rather than on server-side averages
Want this scoped for your business in London?
Thirty minutes, no charge, no sales script. You leave with a written summary of what application performance monitoring would actually involve — whether or not you use us.
Working in London
London
London clients usually come to us because they want senior people actually on their project rather than a large agency's B team, and because Midlands rates buy considerably more delivery per pound.
Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates.
Sectors we work with in London
- Financial Services
- Professional Services
- Technology
- Media
- Hospitality
- Retail
What we work with
Technologies and platforms
- Datadog
- OpenTelemetry
- Grafana
- Sentry
Who we work with
Industries we serve
- Technology and SaaS
- E-commerce
- Financial services
- Media and publishing
- Logistics
Why us
Why London businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in London
Looking for the full picture? See our Application Performance Monitoring services, everything we do in London or browse everything we do.
Application Performance Monitoring in London — common questions
- How does this differ from server monitoring?
- It looks inside the application rather than at the machine. Infrastructure monitoring reports processor and memory; this reports which endpoint is slow, which query is responsible and which users are affected. Servers frequently look entirely healthy while the application is failing people.
- Why do these tools get expensive?
- Because pricing follows data volume, and instrumentation is easy to add. Full tracing on high-traffic services, verbose logging and high-cardinality attributes multiply quickly. Sampling and deliberate attribute choices keep the value while removing most of the cost.
- What is the cardinality problem?
- Attaching values with unlimited possibilities — user identifiers, request identifiers, full URLs — to metrics. Each distinct value creates a separate series, and a handful of such attributes can multiply storage enormously, degrading both the bill and the tool's performance.
- Should we use an open standard?
- Instrumenting with an open standard is generally worth it. It keeps the instrumentation independent of the vendor you send it to, so changing supplier becomes a configuration change rather than a re-instrumentation project. Given how much these tools cost, that optionality is valuable.
- Do you work with businesses across Greater London?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout London, including London and the surrounding Greater London area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of London businesses do you usually work with?
- Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates. Beyond that we work across Financial Services, Professional Services, Technology, Media, Hospitality and Retail.
- Do you cover the areas around London?
- Yes — we work throughout London, including Reading, Milton Keynes, Cambridge, Brighton. London is an urban area of roughly 9,000,000+, and we take on work across the wider Greater London region rather than the city boundary alone.
Talk to us about Application Performance Monitoring in London
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise