Which London B2B Marketing Agency Fits a Small Company? 8 Compared

Which London B2B marketing agency fits a small company? The right fit depends on the bottleneck: weak positioning, too few qualified opportunities, a slow buying journey or poor measurement. Eight agencies with a London presence and explicit B2B work are compared below. Some may serve larger programmes; ask each for a scoped proposal before assuming it fits your budget.

Quick Summary

• The eight agencies are Gripped, Gravity Global, Integrated.Social, The Croc, tmp, Transmission, True and Velocity Partners. This is an alphabetical shortlist, not a quality ranking.
• Integrated.Social publishes this article and is included. Its claims receive the same public-evidence treatment as those of the other agencies.
• Small-company fit is a question to test, not an attribute inferred from an agency's London address or B2B label. Gripped explicitly publishes a total monthly investment expectation; most combined engagements require a quote.
• Separate strategy, delivery, media, software and production costs. No defensible market-wide retainer price can be derived from a Google AI Overview.
• Judge an agency on named practitioners, clear scope, relevant case evidence, sales-accepted pipeline and the first 90 days of work.

How this guide helps you decide

1. Apply the public-evidence selection tests (B2B focus, London presence, emphasised problem, small-team fit).
2. Review the eight-agency alphabetical shortlist and first-party evidence links.
3. Match capability to your main constraint — positioning, opportunities, buying cycle or measurement.
4. Separate strategy, agency fee, media, production and tools on the same scoped brief.
5. Evaluate case studies with dates, denominators and limitations — not pipeline labelled as revenue.
6. Ask every shortlist, including the publisher, the same ownership and first-90-day questions.

By Modi Elnadi, Founder of Integrated.Social. Updated 28 September 2026.

Editorial disclosure and method: Integrated.Social is the publisher and one of the agencies listed. Inclusion required an official site showing B2B marketing work and a London office or presence. Entries are alphabetical; there is no paid placement or “best” score. “Potential fit” is an editorial inference from public positioning, not an independently audited outcome. This shortlist is illustrative, not exhaustive. Agencies, capabilities and fees can change, so confirm them in a proposal.

How did we select these London B2B agencies?

We checked official agency pages for B2B positioning and London presence, then described the most relevant publicly stated specialism. We did not require every firm to offer SEO, AI search, paid media and ABM, because a small company usually needs a specific capability first. A company offering only brand identity or serving London remotely may still be valuable, but falls outside this shortlist's stated filter.

The original twelve-agency draft mixed a Glasgow agency with London firms, counted Earnest separately after its acquisition by Transmission, and included broad creative or branding providers without a consistent small-B2B selection test. This edition narrows the list and states the limits of each entry.

First-party evidence vs directory claims

A directory “B2B marketing” category or another publisher's roundup does not establish a London B2B service or its fee for a small company. Prefer the agency's own service and location pages, then ask for named practitioners, current scope and a first-90-day plan in the proposal.

What does “small B2B company” mean in this guide?

It means a business with a limited marketing team that needs an agency to own a defined growth or positioning problem, usually with sales involved in qualification. It does not impose one employee, revenue or media-spend threshold on all readers. A five-person SaaS company and a twenty-person professional-services firm can have very different budgets and buying cycles.

Is this a ranking of the best agencies?

No. The eight entries are alphabetical and were selected through a public-evidence filter, not a scored comparison of client outcomes. The available case studies, fees and team structures are not measured on a common basis. Treat this as a shortlist to investigate. The best fit depends on the problem, contract scope, people and commercial constraints in your own brief.

Which eight London B2B marketing agencies should you compare?

Gripped, Gravity Global, Integrated.Social, The Croc, tmp, Transmission, True and Velocity Partners have official material supporting B2B work and London presence. Their emphases differ considerably, from SaaS demand generation and performance marketing to brand-to-demand and enterprise ABM. The table is a navigation aid; “potential fit” is an inference for buyer research, not a performance endorsement.

“Scope a quote” means no comparable fee for this particular brief was verified; it is not a claim that the agency publishes no prices for any service. Gripped's threshold is total agency and media investment, not an agency retainer alone.

When might Gripped fit?

Gripped positions itself for B2B SaaS, AI and technology demand generation from London. Its booking page states a likely fit includes £2m–£50m annual recurring revenue and readiness to invest at least £10,000 per month across agency and media fees. That is useful screening information, not a general price for all small firms.

When might Gravity Global fit?

Gravity Global's London page describes B2B work in complex sectors and a brand-to-demand approach across creative, digital and technology. A small company with a significant repositioning challenge may want to investigate a tightly scoped project. Ask whether the proposed team and minimum commitment suit your size and whether demand execution is included.

When might Integrated.Social fit?

Integrated.Social describes a London B2B AI growth offering combining SEO/AEO/GEO, PPC and Performance Max and ABM. Its case study collection includes FinTech, B2B SaaS and destination marketing. These are publisher-reported engagements in different channels, not a like-for-like agency benchmark.

The B2B SaaS case study describes a qualified-pipeline programme across 47 target accounts. Ask for the exact measurement window, pipeline stage definition and attributable versus closed-won amounts when evaluating the result, as with any agency's case study.

When might The Croc fit?

The Croc describes itself as an independent B2B brand-to-demand agency with strategy, creative, media, technology and data services in London. This may suit a company whose offer lacks distinctiveness and whose demand programmes need creative support. Request a small-scope workplan and a concrete measure of commercial progress rather than assuming all services will be used.

When might tmp fit?

tmp, formerly The Marketing Practice, describes global B2B brand and demand work and account-based marketing with a London presence. Its public positioning leans towards complex organisations. A small company should ask whether a focused pilot is available, who would deliver it and how the required fee compares with an in-house or boutique alternative.

When might Transmission fit?

Transmission publishes B2B strategy and integrated services from a London office. It announced its acquisition of Earnest in January 2025, so Earnest is not counted as a separate current option here. A buyer seeking brand and demand under one plan can ask for a defined first phase and named team before committing to a broad programme.

When might True fit?

True presents itself as a B2B marketing specialist with a London address and work focused on brand and marketing communications. It may be worth investigating when the immediate constraint is differentiation or campaign resonance. Ask how the proposed work will be tested with buyers and connected to opportunity quality, beyond awareness metrics alone.

When might Velocity Partners fit?

Velocity Partners presents B2B positioning, campaigns and performance work and invites prospects to meet in London through its contact page. It may fit technology firms whose story is complex or too similar to competitors. Confirm whether execution, marketing operations and measurement are included in the proposed engagement, rather than inferred from the broader capability list.

How should a small B2B company choose an agency?

Start with the business constraint and one measurable outcome, then choose the specialist or operating model capable of changing it. Ask every agency to diagnose the same brief: audience, offer, sales cycle, baseline pipeline and budget. Compare the named team, proposed first 90 days, data access, deliverables, decision gates and exit terms before comparing headline fees.

Integrated.Social's AQL versus MQL analysis explores the distinction between a lead score and a real opportunity. Its organic, paid and agentic AI measurement framework covers channel overlap and customer-value questions.

Which questions should you ask before signing?

Ask who will do the work, what they will deliver in the first month, which CRM stages define success and how often the plan will change. Request a relevant case with dates, a clear denominator and its limitations. Confirm ownership of ad accounts, analytics, creative assets and data; itemise notice periods, dependencies and what happens if the named team changes.

What should the first 90-day plan contain?

The first month should validate the baseline, ideal customer profile, conversion events and sales feedback. The second should launch a focused message, channel or landing-page test. The third should evaluate qualified opportunity movement and decide what to scale, stop or redesign. Long sales cycles may prevent a closed-revenue verdict in 90 days, so define interim evidence honestly.

How much does a London B2B marketing agency cost?

There is no defensible universal monthly price for this group because brand strategy, content, paid media, ABM, analytics and AI search require different teams and volumes of work. One agency publishes a total investment threshold; most need a brief to quote. Compare itemised proposals for identical deliverables, and separate the agency fee from media, software and production.

Do not treat a free audit as the price of the subsequent work. Nor should a Google AI Overview be cited as an independently verified UK agency pricing survey. For a narrower AI-search cost discussion, see our UK AEO pricing guide; use a written scope for actual procurement.

Separate fee, media and tool lines

Request itemised proposals that split agency fee, media, production and third-party tools. Compare exclusions and ownership of accounts and raw data. Gripped's published threshold is total agency-plus-media investment; do not treat it as a retainer-only figure or as a market-wide average.

Is a retainer, project or hybrid model better?

A fixed project fits a defined positioning, audit or website task. A retainer can suit continuous campaign management and experimentation where a team must act on fresh data. A hybrid starts with a diagnostic or build, then retains only the necessary optimisation capacity. Compare total cost and accountability over the likely sales cycle, not just the first invoice.

How do you evaluate case studies and claimed ROI?

Ask what changed, for whom, over which period and compared with what baseline. Distinguish pipeline value from realised revenue, attributed from incremental outcomes and single-channel from multichannel work. Check whether the metric reflects the agency's work, the client's sales process or both. A case study is useful proof of method, not a guarantee of your result.

The original software draft called Integrated.Social's reported £2.4m pipeline “revenue” and described its 2026 result inconsistently with another site page's timeframe. This revised guide does not repeat that number in the comparison table. The underlying case study remains linked so buyers can inspect the stated programme and ask for reconciliation.

Pipeline is not closed revenue

Do not present pipeline value as won revenue, or credit an entire deal to one channel, without evidence of contribution and stage definition. Ask for the measurement window, sales-accepted definition and attributable versus closed-won amounts.

Which metrics should a small B2B firm require?

Report sales-accepted leads, qualified opportunities, pipeline stage progression, win rate, deal value and customer acquisition cost by channel or account cohort. Add the operational measures needed to diagnose them, such as response time and form quality. For a long sales cycle, use leading indicators without presenting them as closed revenue; revisit attribution and incrementality as evidence matures.

Frequently asked questions about London B2B agencies

Small B2B buyers usually need clarity on fit, minimum spend, deliverables, people and proof before selecting a partner. These answers distinguish publicly verified scope from what must be established in a proposal. No agency on this page is ranked by an independent client outcome study, and Integrated.Social's inclusion is disclosed as publisher interest.

Which London B2B marketing agency fits a small company?

The right fit depends on the bottleneck: weak positioning, too few qualified opportunities, a slow buying journey or poor measurement. Eight agencies with a London presence and explicit B2B work are compared below: Gripped, Gravity Global, Integrated.Social, The Croc, tmp, Transmission, True and Velocity Partners. Some may serve larger programmes; ask each for a scoped proposal before assuming it fits your budget.

What are the best B2B marketing agencies in London for small companies?

There is no single best agency for every small B2B company. This guide compares eight London-present B2B agencies: Gripped, Gravity Global, Integrated.Social, The Croc, tmp, Transmission, True and Velocity Partners. Some are positioned for larger programmes. Shortlist by the specific bottleneck, budget and named delivery team, then request comparable proposals.

Which London agency specialises in B2B SaaS demand generation?

Gripped explicitly positions itself around SaaS, AI and technology demand generation and states an expected minimum total agency-plus-media investment on its booking page. Integrated.Social also describes B2B pipeline, paid search and ABM work. Compare relevant cases, sales-accepted opportunity measurement, account ownership and the practitioners who would actually deliver your programme.

Can a small company afford an enterprise B2B agency?

It depends on minimum scope and whether a focused project is available. A large agency may be appropriate for a complex rebrand or international launch, but a broad retainer can exceed a small team's needs. Ask for a phased proposal with named people, deliverables and total costs, then compare it with boutique and in-house options.

How much should I budget for a B2B marketing agency in London?

Set a budget from the commercial value of the problem and the work required, not a generic market average. Separate agency fees, media, production and software. One shortlisted agency states a total monthly agency-plus-media threshold; the rest require scope-specific quotes in this comparison. Ask three candidates to price the same first-90-day brief.

Is a free AI visibility audit a substitute for a B2B marketing audit?

No. An AI visibility check can show how a brand appears in selected answer experiences, but a B2B marketing audit also needs buyer research, offer and message review, conversion tracking, sales handoff and pipeline economics. Use a free diagnostic to decide what to investigate next, and ask what data and work a full audit includes.

Should the agency report leads, pipeline or revenue?

The agency should report all relevant stages, with clear definitions and caveats. Lead volume helps diagnose acquisition, sales-accepted opportunities test quality, pipeline shows potential value and won revenue reflects commercial outcomes after the sales cycle. Do not call pipeline revenue or credit the entire deal to one channel without evidence of its contribution.

Do small B2B companies need AEO or GEO?

It is worth testing when buyers research category, comparison or vendor questions in AI-assisted search. First establish whether your pages are crawlable, useful and supported by credible proof. Measure a representative set of buyer prompts and business outcomes over time. AEO/GEO is not a substitute for a clear proposition or a working sales process.

What should I own if I change agencies?

Keep ownership or transferable access to ad accounts, analytics, CRM data, website content, creative files, domains, reporting definitions and experiment history. Agree licences and handover terms in the contract. A successor should be able to see what was tested, what changed and how outcomes were measured without rebuilding the entire evidence base.

How did we select these London B2B agencies?

We checked official agency pages for B2B positioning and London presence, then described the most relevant publicly stated specialism. We did not require every firm to offer SEO, AI search, paid media and ABM, because a small company usually needs a specific capability first. The shortlist is illustrative, not exhaustive, and omission does not imply a firm lacks expertise.

Is this a ranking of the best agencies?

No. The eight entries are alphabetical and were selected through a public-evidence filter, not a scored comparison of client outcomes. The available case studies, fees and team structures are not measured on a common basis. Treat this as a shortlist to investigate. The best fit depends on the problem, contract scope, people and commercial constraints in your own brief.

What does “small company” mean in this guide?

It means a business with a limited marketing team that needs an agency to own a defined growth or positioning problem, usually with sales involved in qualification. It does not impose one employee, revenue or media-spend threshold on all readers. A five-person SaaS company and a twenty-person professional-services firm can have very different budgets and buying cycles.

What should the first 90-day plan contain?

The first month should validate the baseline, ideal customer profile, conversion events and sales feedback. The second should launch a focused message, channel or landing-page test. The third should evaluate qualified opportunity movement and decide what to scale, stop or redesign. Long sales cycles may prevent a closed-revenue verdict in 90 days, so define interim evidence honestly.

Is a retainer, project or hybrid model better?

A fixed project fits a defined positioning, audit or website task. A retainer can suit continuous campaign management and experimentation where a team must act on fresh data. A hybrid starts with a diagnostic or build, then retains only the necessary optimisation capacity. Compare total cost and accountability over the likely sales cycle, not just the first invoice.

Which metrics should a small B2B firm require?

Report sales-accepted leads, qualified opportunities, pipeline stage progression, win rate, deal value and customer acquisition cost by channel or account cohort. Add the operational measures needed to diagnose them, such as response time and form quality. For a long sales cycle, use leading indicators without presenting them as closed revenue; revisit attribution and incrementality as evidence matures.

Does Gripped’s £10,000 monthly threshold apply to every small company?

No. Gripped’s booking page states a likely fit includes readiness to invest at least £10,000 per month across agency and media fees — total investment, not an agency retainer alone. That is useful screening information for SaaS and tech demand generation, not a universal London B2B retainer. Most other shortlisted firms require a scoped quote for this brief.

How should a small B2B company choose an agency?

Start with the business constraint and one measurable outcome, then choose the specialist or operating model capable of changing it. Ask every agency to diagnose the same brief: audience, offer, sales cycle, baseline pipeline and budget. Compare the named team, proposed first 90 days, data access, deliverables, decision gates and exit terms before comparing headline fees.

How much does a London B2B marketing agency cost?

There is no defensible universal monthly price for this group because brand strategy, content, paid media, ABM, analytics and AI search require different teams and volumes of work. One agency publishes a total investment threshold; most need a brief to quote. Compare itemised proposals for identical deliverables, and separate the agency fee from media, software and production.

Related guides and next steps

• Improve Google Ads results: 7 PPC optimisation steps
• Generate more qualified B2B leads: 7 UK strategies
• London agencies that handle both AI search and Google Ads
• SEO, AEO and GEO
• PPC and Performance Max
• Free AI growth audit
• Case studies

Sources and next step

Agency descriptions link to their own current websites; this review was checked on 28 September 2026. Transmission's announcement explains why Earnest is not separately listed. Google's AI features guidance says ordinary search eligibility and useful content apply to AI Overviews and AI Mode, without special AI schema requirements.

To evaluate Integrated.Social alongside the other candidates, review its B2B services, published cases and free AI growth audit. Give each firm the same brief and compare the diagnosis, first-90-day plan, fee and accountable team before choosing.