Big Business Agency review
Digitising and unifying operations from Sale to Service
Big Business Agency is a Belfast-based B2B sales consulting and lead generation agency that uses HubSpot-centric technology, omnichannel advertising and workflow automation to build predictable, high-intent pipeline for complex B2B organisations.
Independently researched by the SalesHive team. Ratings are from public review platforms; this page is not sponsored by or affiliated with Big Business Agency. Research last updated December 2025.
What is Big Business Agency?
Big Business Agency (Big Business Agency Ltd) is a specialist B2B sales consulting and lead generation agency that helps companies digitise and unify operations from sale to service using a HubSpot-first technology stack, advertising services and workflow automation. The firm focuses on building intent-led pipelines, aligning sales and customer service, and turning disconnected tools into a single revenue engine. Founded in 2021 and headquartered in Belfast, Northern Ireland, Big Business Agency is led by managing partner and founder Peter Russell-Smith, an experienced enterprise software and services executive with a background in growing PE-backed and public technology businesses. The company operates as a privately held micro-consultancy with 2-10 employees and serves clients across the UK, Ireland, EMEA and APAC. The core offering combines B2B sales consulting, technology implementation and advertising services. On the consulting side, Big Business Agency designs GTM strategies, territory plans, target account maps and sales processes for complex B2B deals, supported by assets such as the Big Deal Sales Map and an AI-powered “Big Deal GPT” coach. On the technology side, the team implements and optimises HubSpot (Sales Hub, Service Hub and Content Hub), CPQ, customer portals, B2B webshops and quote-to-cash automation, integrating HubSpot with ERPs like SAP Business One, Sage, NetSuite and Microsoft Dynamics 365 Business Central via tools such as Commercient and Mobileforce CPQ. For demand generation and SDR enablement, Big Business Agency runs managed omnichannel lead-gen programs across LinkedIn, Google Ads and email, underpinned by precise ICP and target-account definition, landing pages, marketing automation and sales enablement. Its Precision Lead Engine and Ad Intent Data service transform anonymous ad interactions into named, sales-ready leads with full path-to-purchase visibility, while integrated HubSpot workflows route and nurture leads so SDRs and AEs focus on the highest-value opportunities. The agency has delivered results for mid-market and enterprise clients including Bureau Veritas, Eurofins, Hunter Apparel Solutions, Texthelp, Glean, Taxually and Selbey Anderson, and has been recognised as “Leading B2B Management Specialists 2025” in the Irish Enterprise Awards.
Big Business Agency key features
Teams typically use it for B2B lead generation and SDR enablement, account-based marketing and pipeline acceleration, hubSpot CRM implementation and migration, and more.
- ICP & target account mapping. defines Ideal Customer Profiles using firmographic, technographic and intent data, then maps high-value target accounts and key stakeholders.
- Omnichannel B2B lead generation. orchestrates LinkedIn, Google Ads, email outreach and ABM content so campaigns reach decision makers across multiple touchpoints.
- Ad Intent Data service. captures real-time behavioural signals from paid media, turning anonymous ad engagement into named leads with budget allocation, purchase-path analysis and consolidated reporting.
- Landing pages. lead magnets & SEO content, builds high-converting landing pages, lead magnets and insight content to attract inbound leads actively searching for solutions.
- Lead scoring & automated nurturing. scores prospects on engagement and buying signals, then uses marketing automation to nurture them until they are sales-ready.
- Sales enablement for SDRs & AEs. equips reps with AI-powered insights, real-time prospect data, outreach templates and Big Deal GPT guidance to improve win rates on complex deals.
- HubSpot CRM implementation & optimisation. configures Sales Hub, Service Hub and Content Hub around real-world processes, including pipelines, workflows, properties and reports aligned to revenue outcomes.
- LinkedIn Ads management. provides end-to-end LinkedIn ad strategy, targeting, creative, optimisation and reporting, plus optional Expandi-based connection campaigns to grow early-stage pipeline.
- Google Ads demand generation. runs intent-led Google Ads programs with measurement tied to meetings and opportunities, not just clicks or form fills.
- Account-based marketing & territory planning. develops GTM strategies, territory plans and target-account maps so SDR and AE effort stays focused on the most valuable markets and accounts.
- B2B eCommerce & customer portals. deploys HubSpot-based customer portals and webshops that expose contract pricing, order status, help desk and self-service capabilities for B2B buyers.
- Quote-to-cash automation. integrates CPQ, CRM, eCommerce, ERP and billing so quoting, contracting, invoicing and renewals flow through an automated, auditable process.
- CPQ & complex pricing. implements Mobileforce CPQ and related rules to handle complex bundles, services, subscriptions and multi-currency price lists inside HubSpot.
- Workflow automation & CS alignment. builds cross-functional workflows that connect sales, customer service, engineering and field service teams around a single set of data.
- Analytics & dashboards. delivers real-time dashboards and reporting on pipeline health, campaign performance, utilisation and revenue, enabling continuous optimisation.
What reviewers love, and what to watch
A balanced view of Big Business Agency, drawn from public reviews and product research.
Pros
- Deep HubSpot CRM implementation expertise, including complex migrations from Salesforce and tailoring HubSpot to each client’s processes.
- Strong project management and governance heritage that keeps implementations on time, on budget and aligned to PRINCE2-style delivery standards.
- Ability to simplify complex B2B sales and quote-to-cash workflows into clear frameworks and playbooks that teams can adopt quickly.
- High-touch, collaborative engagement style, clients highlight the team as knowledgeable, fun to work with and highly responsive when issues arise.
- Proven results for mid-market and enterprise B2B firms in TIC, manufacturing and technology, including Fortune 500/1000 brands.
- Unique combination of sales consulting, advertising services and systems integration, allowing one partner to own the full lead-to-revenue lifecycle.
Cons
- Very limited volume of public third-party reviews (a small number across Google and HubSpot Marketplace), making statistical benchmarking against larger agencies difficult.
- Small specialist team (roughly 2-10 employees), which may constrain capacity for very large, multi-region rollouts or high SDR headcount without partnering.
- Best suited to organisations standardising on HubSpot and compatible ERPs; companies heavily invested in alternative CRM stacks or pure B2C models may see less direct fit.
Big Business Agency pricing
Published pricing at the time of research. Always confirm current rates with the vendor.
not applicable
Who Big Business Agency is for
A strong fit for
Mid-market or enterprise B2B organisations in sectors like TIC, manufacturing, professional services and software that sell complex, high-value offerings, use or plan to use HubSpot, and need both strategic sales guidance and hands-on help to run omnichannel lead-generation and automate quote-to-cash.
Probably not for
Very small, purely B2C businesses, firms seeking low-cost self-serve SaaS without consulting, or organisations unwilling to standardise around HubSpot or invest in CRM and process change are unlikely to get full value from Big Business Agency’s consulting-led model.
How Big Business Agency compares
Compared with high-volume SDR and appointment-setting vendors such as CIENCE, Belkins, Martal Group or Sopro, Big Business Agency positions itself more as a senior consulting and systems-integration partner that also runs tightly targeted omnichannel campaigns. It is not designed to provide large teams of outsourced SDRs, but rather to engineer the strategy, technology and workflows that make in-house or hybrid SDR teams more effective. For companies whose primary need is raw SDR capacity across many regions, the larger networks may offer more scale. By contrast, organisations with complex products, long sales cycles and fragmented tech stacks often benefit from Big Business Agency’s ability to connect GTM strategy, HubSpot CRM, CPQ, ERP and advertising into a single, intent-led revenue engine. Their sweet spot is helping manufacturing, TIC, technology and professional services firms build predictable, high-intent pipeline while simultaneously fixing quote-to-cash and customer experience issues that can limit conversion and growth.
Frequently asked about Big Business Agency
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