CFOs Use AI Tools to Speed Reporting and Cut Errors

CFOs at EuroTeleSites, PostHog, Emergn and Liberty Global have implemented AI-driven finance platforms to centralise data, speed reporting and automate forecasting across multi-entity operations. The firms combined legacy ERPs with newer AI-native tools to replace manual, Excel-heavy processes.

EuroTeleSites, which operates more than 13,800 mobile towers across six central and eastern European countries, integrated FP&A platform Farseer with its SAP backbone last year. The company reports planning and reporting cycles about 30% faster and planning errors reduced by more than 40%. Farseer’s AI Analyst is used during short internal reporting windows to identify key drivers of variances. Lars Mosdorf, EuroTeleSites’ CFO, noted that consolidating and standardising multiple data sources into a single system improved transparency and collaboration between finance and IT.

Developer platform PostHog uses Brex for expense control, a custom billing system built on Stripe, Campfire as its accounting ERP and Abacum for FP&A. Abacum pulls ERP and HR headcount data together so teams can model scenarios such as hiring pace, marketing spend or hosting costs. The company reduced close times from about 20–25 days to fewer than 10 days, giving near-real-time financial visibility to operational teams. Fraser Hopper, PostHog’s operations and finance lead, highlighted the role of AI tagging in accelerating data delivery: “If it wasn’t for the ability to tag that data using AI, we wouldn’t get this out fast enough.”

At services firm Emergn, NetSuite serves as the ERP foundation and the company uses an internal platform, Pulse, for time recording, revenue forecasting and project management, plus Power BI for dashboards. AI features added to Excel have shortened modelling and variance analysis tasks, and Microsoft Power Platform automates rules-based work such as transaction coding and invoice processing. Anjana Mistry, Emergn’s CFO and COO, warned that clean, consistently structured base data is required for reliable outputs and added, “Having an AI tool in Excel does not make you an accountant.”

Liberty Global replaced Oracle Hyperion with OneStream as it reorganised from operations in 17 countries to an integrated communications group across four markets. OneStream is being positioned as the financial system of record, ingesting management accounts from operating businesses and consolidating structured and unstructured information. Alex Johnstone, divisional CFO, described expectations that automation of routine tasks like journal entries and consolidations will free finance staff to focus on higher-level analysis and business partnering.

Across the four firms, reported results include faster close cycles, more standardised data, lower planning error rates and reallocation of staff time from repetitive tasks to analysis and forecasting. Executives emphasised that the tools are intended to support professional judgement and that reliable outputs depend on accurate source data.