01 / DeclarationRead this before anything else
I sell a competing channel, and inbound is having a hard year
The Lead Gen Company runs paid search. Inbound competes with it for the same budget, so I have an interest in you concluding that content marketing is slow and increasingly uncertain. Section 09 is about exactly that, so read it knowing who wrote it.
Two things in mitigation. Every figure in that section comes from independent research rather than my own analysis, and I have included the evidence that cuts against my interest: the clicks that survive convert materially better, and businesses that hold their nerve are the ones being cited in AI answers now. The Lead Gen Company does not sell inbound marketing and is not scored on this page.
The honest position: inbound still works, the version of it sold between 2014 and 2022 largely does not, and the agencies that have rebuilt around commercial-intent content and revenue attribution are a genuinely different product from the ones still selling four blog posts a month.
02 / The short answerWho to use, and what it really costs
SpotDev and Whitehat SEO share the top score at 7.5/10, both on the same unusual quality: they publish detailed, honest breakdowns of what the underlying platform actually costs, including the fees the vendor's own pricing page does not show. In a market where the software licence is a quarter of your first-year spend and almost nobody itemises it, that transparency is worth more than another case study. Six & Flow (7.2) and Project36 (7.2) follow, the second on a bundled subscription that folds licence and services into one monthly figure.
Huble Digital has the strongest revenue attribution capability here at 9, and ranks sixth only because it is priced and contracted for enterprise. If your problem is that nobody can tell you which marketing produced which deal, buy on that column and ignore the order.
Five things the retainer does not tell you
- A £3,500 retainer is a £56,400 year. Add the platform licence, the mandatory onboarding fee and contact overage and the agency fee is 74% of what you spend, not 100%.
- Your bill grows automatically as your list grows. Marketing contacts are metered, and crossing a threshold by one contact charges a full block. That is the opposite incentive to good list hygiene.
- Professional and Enterprise tiers carry a mandatory onboarding fee of roughly £1,300 to £6,090, charged at purchase and not shown on the pricing page. A partner agency can often redirect it into implementation work.
- You cannot downgrade mid-term. Over-buy seats in January on an annual commitment and you pay for them until renewal, and one Enterprise hub can reprice every seat in the portal.
- The content engine inbound was built on is the exact content AI answers absorb. Educational top-of-funnel articles are where the click losses concentrate. Commercial and comparison pages have held up far better.
03 / MethodSeven criteria, weighted for revenue
Revenue attribution carries 25% because the classic failure of inbound is not that it produces nothing. It is that it produces a lot of activity nobody can connect to a sale, and the engagement ends at month fourteen with both sides believing the other one failed.
| Criterion | Weight | What earns a high score |
|---|---|---|
| Revenue attribution | 25% | Closed-won revenue traced to source, with agreed lifecycle definitions and sales alignment |
| Total cost transparency | 20% | Platform licence, onboarding and contact costs itemised up front rather than discovered later |
| AI search readiness | 15% | A stated approach to citation and commercial-intent content rather than publishing volume |
| Platform independence | 10% | Willingness to say a cheaper tier or different tool would serve you better |
| Contract flexibility | 10% | Reasonable minimum terms and a break clause given the timescales |
| Content commercial focus | 10% | Work weighted to pages that convert rather than traffic-chasing articles |
| RevOps & technical depth | 10% | CRM architecture, integrations and data hygiene, not just campaign execution |
On scores and prices
Scores reflect published positioning, pricing transparency and public commentary rather than an audit of client work, which no outsider can perform. Almost no UK inbound agency publishes retainer pricing, so fees are market-band estimates and labelled as such; the platform figures in sections 07 and 08 are published list prices verified by third parties in 2026. Ties are broken by revenue attribution.
04 / At a glanceThe full comparison
| # | Agency | Score | Attribution | Indicative UK retainer | Best for |
|---|---|---|---|---|---|
| 1 | SpotDevDiamond partner | 7.5 | 7/10 | Est. £2,500 to £8,000/mo | Technical implementation and honest cost modelling |
| 2 | Whitehat SEODiamond partner | 7.5 | 7/10 | Est. £2,500 to £7,000/mo | Inbound with genuine search capability behind it |
| 3 | Six & FlowManchester | 7.2 | 8/10 | Est. £3,000 to £10,000/mo | Demand generation rather than classic inbound |
| 4 | Project36 | 7.2 | 7/10 | From £500, typically £2,500/moPublished, licence included | One bundled fee covering licence and services |
| 5 | BabelQuestOxfordshire | 7.0 | 8/10 | Est. £3,000 to £9,000/mo | Sales and marketing alignment programmes |
| 6 | Huble DigitalLondon, global | 6.9 | 9/10 | Est. £5,000 to £20,000/mo | Enterprise attribution and CRM architecture |
| 7 | Axon GarsideManchester | 6.8 | 8/10 | Est. £3,000 to £8,000/mo | Industrial and manufacturing B2B |
| 8 | Articulate MarketingLondon | 6.8 | 6/10 | Est. £2,000 to £6,000/mo | Writing quality and technology sector content |
| 9 | StrutoElite partner | 6.5 | 7/10 | Est. £2,500 to £8,000/mo | Integrations and platform migrations |
| 10 | Tomorrow People | 6.4 | 7/10 | Est. £3,000 to £8,000/mo | Content-led brand and thought leadership |
| 11 | Really B2BReading | 6.3 | 8/10 | Est. £4,000 to £12,000/mo | Integrated B2B demand generation at scale |
One pattern worth naming. The two agencies at the top score 9 on total cost transparency and 7 on attribution, while three agencies further down score 8 or 9 on attribution and 5 or 6 on transparency. That is the trade-off this market currently forces: the firms that will tell you what it really costs are not always the firms with the deepest measurement capability, and vice versa. Ask the transparency questions of the capable agencies and you get both.
05 / The elevenReviewed one by one
Same seven bars throughout. Where scores tie, the higher revenue attribution score ranks first.
SpotDev
Best technical implementation and honest cost modelling
What it is. A UK platform implementation and RevOps specialist working on CRM architecture, integrations and technical build rather than campaign production alone.
Why total cost transparency scores 9. It publishes a detailed UK pricing breakdown in sterling, checked against the vendor's own price list, covering seats, marketing contacts, mandatory onboarding, AI credits and billing terms, and states its partner status openly while doing so. An agency that publishes the costs its own commercial interest would prefer you not to model is telling you something useful about how it will behave later.
Where it is weaker. Content commercial focus scores 6. This is an engineering-led firm, so if your gap is that nobody is writing anything worth reading, pair it with a content specialist rather than expecting both.
Strengths
- Publishes full platform costs in sterling, including hidden fees
- Deepest technical and RevOps capability in this guide
- Declares partner status alongside pricing advice
- Strong on integrations and data architecture
Considerations
- Content production is not the strength
- No published retainer pricing
- Engineering-led approach suits some buyers more than others
- Partner status still creates a platform preference
Whitehat SEO
Best inbound with real search capability behind it
What it is. A London agency combining inbound methodology with genuine search expertise, and one of the few publishing a full UK platform pricing guide with an explicit disclosure of its own commercial interest.
Why AI search readiness scores 8, the highest here. Search is a core discipline rather than a supporting one, which matters more in 2026 than at any point since inbound was invented, because the content model depends entirely on being found. An agency that has thought hard about citation and zero-click search is answering the question that decides whether the content budget works at all.
Where it is weaker. RevOps depth scores 6, below the implementation specialists. Strong on getting found and converting; less deep on complex CRM architecture and integration work.
Strengths
- Publishes full platform costs with an explicit interest disclosure
- Genuine search capability rather than content production alone
- Best AI search positioning in this guide
- Long-established UK partner
Considerations
- Less RevOps and integration depth than the technical specialists
- No published retainer pricing
- Longer minimum terms
- Partner status still creates a platform preference
Six & Flow
Best demand generation rather than classic inbound
What it is. A Manchester agency that moved earlier than most from classic inbound towards demand generation, weighting work to capturing existing demand rather than producing educational content and waiting.
Why that shift matters now. Content commercial focus scores 8 and AI search readiness 8. The agencies that repositioned before the click decline are the ones whose model still works, because commercial-intent pages have held their traffic while informational content absorbed the losses.
Where it is weaker. Total cost transparency scores 6 and contract flexibility 6. Retainers are quote-based with typical minimum terms, so you will need to ask the platform cost questions in section 07 rather than finding the answers published.
Strengths
- Repositioned to demand generation ahead of the market
- Strong commercial-intent content focus
- Good attribution and RevOps capability
- Well-regarded UK partner with strong references
Considerations
- No published pricing
- Typical minimum terms rather than flexible
- You must ask for the platform cost breakdown
- Higher entry point than smaller agencies
Project36
Best single bundled fee
What it is. An agency selling a subscription that bundles the platform licence, implementation, onboarding, support and agency services into one monthly figure, published from £500 a month and typically around £2,500.
Why transparency scores 9 and flexibility 8. Bundling solves the exact problem section 07 describes: you get one number instead of four, and the agency carries the complexity of tier selection rather than passing it to you. It also publishes that the licence is typically only 40% to 60% of first-year spend, which is the most useful single statistic in this market.
Where it is weaker. AI search readiness scores 6 and content focus 6. This is a platform and operations proposition more than a content one, so judge it on implementation rather than on demand creation.
Strengths
- One published monthly figure covering licence and services
- Removes tier selection complexity from the buyer
- Genuinely low entry point
- Publishes honest total-cost-of-ownership analysis
Considerations
- Content and demand creation are not the strengths
- Bundling means less visibility of what each element costs
- AI search positioning is modest
- Switching later means unpicking a bundle
BabelQuest
Best for sales and marketing alignment
What it is. A long-established UK partner focused on connecting marketing activity to sales process, with strong CRM implementation alongside campaign work.
Why attribution scores 8. The alignment work is the attribution work. Agreeing lifecycle stage definitions, getting sales to accept and update them, and building reporting on top is unglamorous and it is the difference between a programme that can prove its value and one that cannot.
Where it is weaker. Transparency scores 6, flexibility 6. Quote-based retainers and typical minimum terms, so the platform cost questions are yours to ask.
Strengths
- Strong attribution through genuine sales alignment
- Long-established with deep platform certification
- Good RevOps and implementation capability
- Solid B2B track record
Considerations
- No published pricing
- Typical minimum terms
- AI search positioning is competent rather than leading
- Requires sales-side buy-in to deliver its main strength
Huble Digital
Deepest attribution capability, priced for enterprise
What it is. A large international consultancy working on enterprise CRM architecture, revenue operations and marketing technology, operating across multiple regions with substantial technical resource.
Why attribution and RevOps both score 9. Nothing else here matches it on capability. If your problem is that you have several systems, a long sales cycle and no reliable way to say which marketing produced which closed deal, this is the firm equipped to fix it, and the smaller agencies are not.
Why it ranks sixth. Transparency 5, platform independence 5, flexibility 5. Enterprise procurement, annual terms, no published pricing, and a deep commercial relationship with the platform. On a capability ranking it would be first. On criteria that weight cost clarity and buyer flexibility it is not, and both are true.
Strengths
- Best attribution and RevOps capability in this guide
- Genuine enterprise and multi-region capacity
- Deep technical resource the smaller agencies lack
- Strong track record on complex implementations
Considerations
- Weakest transparency and flexibility scores here
- Enterprise procurement and annual terms
- Highest entry point of any agency in this guide
- Deep platform alignment reduces independence
Axon Garside
Best for industrial and manufacturing B2B
What it is. A Manchester agency specialising in inbound for manufacturing, engineering and industrial B2B, sectors that most content agencies find difficult because the buying cycle is long and the subject matter technical.
Why the specialism matters. Attribution scores 8 and content commercial focus 8. Industrial buyers research quietly over months and rarely fill in a form until late, which makes generic inbound measurement useless and sector understanding essential. An agency that knows this writes for the specification stage rather than the awareness stage.
Where it is weaker. AI search readiness scores 6 and transparency 6. Competent rather than leading on the search shift, and no published pricing.
Strengths
- Genuine specialism in industrial and manufacturing B2B
- Content weighted to the specification stage
- Good attribution for long, quiet buying cycles
- Understands technical subject matter
Considerations
- AI search positioning is competent rather than leading
- No published pricing
- Narrower sector focus
- Less technical RevOps depth than the specialists
Articulate Marketing
Best writing quality
What it is. A London agency built around writing quality, working largely with technology companies and publishing extensively on the craft of business writing.
Why content focus and AI readiness both score 8. Genuinely good writing is now a competitive advantage rather than a nicety. When AI answers absorb the generic explanation of a topic, the content that still earns a click is the content with a point of view, and that is a writing problem before it is an SEO problem.
Where it is weaker. RevOps depth scores 5, the lowest here, and attribution 6. If you need CRM architecture and closed-loop reporting, this is not the firm; if you need things worth reading, few here are better.
Strengths
- Best writing quality in this guide
- Strong position for a market that rewards distinctiveness
- Good flexibility and reasonable entry point
- Publishes openly on its own methods
Considerations
- Weakest RevOps and technical depth here
- Attribution capability is limited
- Not suited to complex CRM requirements
- Smaller scale than the implementation specialists
Struto
Best for integrations and migrations
What it is. A long-standing UK partner with strength in platform integration and migration work, moving businesses onto the platform and connecting it to existing systems.
Who it works for. Businesses whose problem is technical rather than creative: data trapped in a legacy CRM, systems that do not talk to each other, or a migration that previously went badly. RevOps depth scores 8.
Why it ranks ninth. No criterion above 8 and several at 6. A capable implementation partner in a table where the leaders each have a distinguishing strength, and where content and search capability are weighted more heavily than integration work.
Strengths
- Strong integration and migration capability
- Long-established elite partner
- Good technical resource
- Useful when a previous implementation went wrong
Considerations
- No standout strength on demand generation
- No published pricing
- AI search positioning is modest
- Content capability is limited
Tomorrow People
Best content-led thought leadership
What it is. A B2B agency focused on content strategy and thought leadership for considered purchases, working on positioning and narrative alongside campaign delivery.
Who it works for. Businesses whose gap is that nobody knows who they are or why they are different. Content commercial focus scores 8, and in a market where brand recognition protects you from the zero-click problem, that has become more valuable rather than less.
Why it ranks tenth. Transparency scores 5, the joint lowest. No published pricing, no published platform cost guidance, and attribution capability that is competent rather than strong. Thought leadership is also the hardest inbound output to attribute to revenue, which compounds the issue.
Strengths
- Strong content strategy and positioning capability
- Good fit for considered, high-value purchases
- Brand building protects against zero-click losses
- Experienced in complex B2B narratives
Considerations
- Joint-weakest cost transparency here
- Thought leadership is the hardest output to attribute
- No published pricing
- Limited technical depth
Really B2B
Best integrated demand generation at scale
What it is. A B2B agency running integrated demand generation combining content, paid media, telemarketing and data, at a scale most inbound specialists do not attempt.
Why attribution scores 8. Running several channels for the same client forces measurement discipline, because you cannot allocate budget across four channels without knowing which produced pipeline. That integration is a genuine advantage over single-channel inbound.
Why it ranks last. Transparency 5 and flexibility 5, both joint lowest. Longer minimum terms, higher entry point and no published pricing, in a table where the leaders publish detailed cost breakdowns. It is a capable agency judged harshly by criteria built around cost clarity.
Strengths
- Genuine multi-channel integration including telemarketing
- Measurement discipline forced by channel allocation
- Scale for larger demand generation programmes
- Established B2B specialism
Considerations
- Joint-weakest transparency and flexibility scores
- Longer minimum terms and higher entry point
- No published pricing
- Less pure inbound specialism than others here
Need pipeline sooner than month nine?
Inbound builds an asset and takes time. If the gap matters, tell me what you sell and I will give you an honest read on which channel fits the timeline.
06 / MoneyWhat inbound costs in the UK
| Tier | Monthly retainer | What you get |
|---|---|---|
| Freelancer or small studio | £1,000 to £2,000 | Content production and basic automation, limited strategy |
| Small partner agency | £2,000 to £3,500 | Strategy, content, platform management, some reporting |
| Established partner | £3,500 to £8,000 | Full programme with attribution, RevOps and sales alignment |
| Enterprise consultancy | £8,000 to £20,000 | CRM architecture, multi-region, complex integrations |
| Bundled subscription | From £500, typically £2,500Licence included | One fee covering platform and services |
07 / New analysisThe platform tax nobody itemises
Inbound is the only channel in this market where a third party takes a large, recurring, contractually inflexible slice of your budget, and where almost no proposal shows it to you as a line item.
Work a realistic mid-market year. A £3,500 monthly retainer, Marketing Hub Professional at the published UK price, the mandatory onboarding fee, and a contact list that has grown past the included allowance.
| Line | Year one | Share |
|---|---|---|
| Agency retainer at £3,500 a month | £42,000 | 74% |
| Platform licence at £780 a month | £9,360 | 17% |
| Mandatory onboarding fee | £2,700 | 5% |
| Contact overage at £195 a month | £2,340 | 4% |
| Year one total | £56,400 | 100% |
Three points follow. The retainer is 74% of your spend, not 100%, so a £3,500 quote is really a £4,700 monthly commitment. The onboarding fee is charged at purchase, is not shown on the vendor's pricing page, and is typically only discovered at checkout. And one UK partner estimates the licence is only 40% to 60% of first-year spend once implementation and support are counted, which for complex builds pushes the gap wider still.
Three contractual traps worth knowing before you sign
No mid-term downgrade. Under the platform's terms you cannot reduce tier or seat count during a term. Over-buy in January on an annual commitment and you pay until renewal.
Seats reprice to your highest tier. Hold Marketing Professional and add a single Enterprise licence elsewhere and every Core Seat in the portal reprices. Across 25 seats that is roughly £9,000 a year created by one upgrade.
Renewal uplift is automatic. A roughly 5% annual increase applies on Professional and Enterprise contracts unless you negotiate, so start that conversation weeks before renewal rather than after the invoice.
A good partner agency can often redirect the mandatory onboarding fee into implementation work you actually need. Ask about it explicitly, because it is worth £1,300 to £6,090 and it is rarely volunteered.
08 / New analysisThe contact meter runs against you
Most software bills you per seat. Marketing automation bills you per marketing contact, which means your cost rises automatically as your list grows, whether or not those contacts are worth anything.
| Marketing contacts | Monthly licence | Annual |
|---|---|---|
| 2,000 (included) | £780 | £9,360 |
| 7,000 | £975 | £11,700 |
| 12,000 | £1,170 | £14,040 |
| 22,000 | £1,560 | £18,720 |
Two consequences that should change how you run the programme. Crossing a threshold by a single contact charges a full block, so a list growing from 2,000 to 2,100 triggers the same increase as one growing to 7,000. And an agency paid to grow your database has no incentive to prune it, while every disengaged contact you keep is costing you money in a way a per-seat tool never would.
The question to ask your agency
"How many of our marketing contacts have engaged in the last twelve months, and what would our licence cost if we archived the rest?" A good agency will have run this already. An agency that treats database size as a success metric will not have, and the answer usually pays for a quarter of the retainer.
09 / New analysisWhat AI search did to the inbound engine
Classic inbound has a specific mechanism: publish educational content answering the questions your buyers ask early, rank for those questions, capture the traffic, nurture it. Every stage of that depends on the first one, and the first one is where the losses have concentrated.
Around 68% of Google searches now end without a click, up from roughly 60% in 2024. A randomised field experiment in early 2026 found AI Overviews reduced organic clicks by 38% on the queries where they appear. Coverage in B2B technology queries approaches 90%, against roughly 3% in ecommerce. Educational, top-of-funnel, "what is" and "how to" content is precisely the material an AI summary reproduces most completely, because it is factual and uncontested.
The counter-evidence matters, and I have an interest in understating it, so here it is plainly. The clicks that survive convert roughly 23% better, because a reader who clicks after reading a summary has already self-qualified. Market-level organic traffic fell only around 2.5% year on year rather than collapsing. And brand recognition, which good content builds, is what makes people search for you by name, which is the query type least affected by any of this.
What this means practically is a reweighting rather than an abandonment. Fewer articles explaining what a thing is; more pages comparing options, answering commercial questions, and giving a defensible point of view that a summary cannot flatten. An agency proposing four educational blog posts a month in 2026 is selling the format with the worst outlook in the market, and it is a fair question to put to them directly.
10 / Ask theseTen questions before you commit
- What is my total year-one cost, including licence, onboarding and contacts? One number, itemised.
- Can the mandatory onboarding fee be redirected into implementation work? Worth £1,300 to £6,090.
- What tier do we actually need, and what would you put us on if you earned nothing from the licence? The answer reveals the conflict.
- How many of our contacts are engaged, and what would archiving the rest save? Should already be answered.
- How will closed-won revenue be traced back to source? Not sessions, not MQLs.
- Who agrees the MQL and SQL definitions, and does sales accept them? If sales was not in the room, the definitions are decoration.
- What proportion of proposed content targets commercial intent? The informational half is where the clicks went.
- How do you measure whether we appear in AI answers? There should be a named method.
- What does month six look like, and what would tell us this is failing? A good agency has a failure condition.
- Who owns the content, the portal and the data at exit? Confirm the portal is in your name, not the agency's.
11 / QuestionsWhat buyers ask before signing
How much do inbound marketing agencies charge in the UK?
Retainers run roughly £1,000 to £2,000 for freelancers and small studios, £2,000 to £3,500 for small partner agencies, £3,500 to £8,000 for established partners and £8,000 to £20,000 for enterprise consultancies. The retainer is not the total: add the platform licence, mandatory onboarding and contact overage and a £3,500 monthly retainer becomes a £56,400 first year, of which the agency fee is about 74%.
Which is the best inbound marketing agency in the UK?
On the seven criteria used here, SpotDev and Whitehat SEO share the top score at 7.5 out of 10, both because they publish detailed honest breakdowns of platform costs alongside their services. Six & Flow and Project36 score 7.2. Huble Digital has the strongest revenue attribution capability at 9 out of 10 and ranks sixth only because it is priced and contracted for enterprise, so buy on that column if attribution is your problem.
What are the hidden costs of an inbound programme?
Four of them. A mandatory one-time onboarding fee of roughly £1,300 to £6,090 on Professional and Enterprise tiers, charged at purchase and not shown on the pricing page. Marketing contact overage, billed in blocks as your list grows. AI feature credits, billed on usage. And a roughly 5% automatic renewal uplift on Professional and Enterprise contracts unless negotiated. Ask for total year-one cost itemised, not the retainer.
Can I reduce my platform tier if it is not working?
Not mid-term. Under the platform's terms you cannot reduce tier or seat count during a contract term, so seats bought in January on an annual commitment are paid for until renewal. There is a second trap worth knowing: Core Seats bill at the highest tier you hold, so adding one Enterprise licence anywhere reprices every seat in the portal, which across 25 seats is roughly £9,000 a year created by a single upgrade.
Is inbound marketing still effective in 2026?
The commercial-intent half of it is. The educational top-of-funnel half is under real pressure: roughly 68% of Google searches now end without a click, AI Overviews cut organic clicks by about 38% on affected queries, and coverage on B2B technology queries approaches 90%. The counter-evidence is that surviving clicks convert around 23% better and market-level traffic fell only around 2.5% year on year. It is a reweighting towards comparison and decision-stage content, not an abandonment.
Why does my inbound programme produce leads sales will not call?
Almost always because the lifecycle definitions were written by marketing without sales in the room. An MQL defined as anyone who downloaded a guide will produce volume and no pipeline. Fix it by agreeing written qualification criteria jointly, requiring sales to accept or reject each MQL with a reason, and reporting on accepted leads rather than generated ones. Any agency that cannot describe how it will do this is selling activity.
Does my agency have a conflict of interest over the platform?
Usually a mild one. Partner agencies gain tier status and commercial benefits from client licences, which creates a gentle pull towards higher tiers and towards one platform over alternatives. That does not make them dishonest, and partner-delivered onboarding is often better value than the vendor's own. The useful question is direct: "what would you put us on if you earned nothing from the licence?" A good agency answers it without hesitating.
How long before inbound produces pipeline?
Typically six to twelve months for meaningful flow, with the first three spent on setup, migration and content foundations. That makes the total committed before you can judge it the number that matters: at £4,700 a month all in, nine months is roughly £42,000. Negotiate a break clause at month six and agree in advance what success and failure look like at that point, rather than discovering the disagreement at month fourteen.
Should I choose inbound or paid search?
They answer different questions. Paid search produces enquiries within weeks and stops when you stop paying. Inbound produces little for months, then compounds, and leaves you owning content, a database and a CRM. If you need pipeline this quarter, start with paid. If you can fund nine to twelve months, inbound builds an asset. Many businesses run both, using paid to fund the wait. I sell paid search, so weigh that accordingly.
12 / TransparencyMethod, limitations and sources
How this guide was built
Agencies were selected from UK firms where inbound and marketing automation are the core discipline rather than one service among many, spread across implementation-led, content-led and demand-generation positions. Each was scored against the seven weighted criteria in section 03, using published pricing and cost guidance where available and market benchmarks where not. Ties are broken by revenue attribution.
The conflict, restated. The Lead Gen Company runs paid search and competes with inbound for the same budget. That is declared in section 01, every figure in section 09 is sourced to independent research, and the counter-evidence that undermines my commercial interest is included rather than omitted. The Lead Gen Company does not sell inbound marketing and is not scored here.
Other limitations. Scores reflect published positioning, cost transparency and public commentary, not an audit of client work. Total cost transparency scores are the most objective column here, because publishing a cost breakdown is a checkable fact; attribution and AI readiness scores are informed judgements and should be treated as hypotheses to test in a first meeting. Platform figures are published list prices verified by third parties during 2026 and exclude VAT; they change, so check before budgeting.
Corrections. If you work at one of these agencies and a figure is wrong, send the correction and the page it is published on, and this guide will be updated with the change noted.
Sources
- HubSpot Product and Services Catalog, published tier and onboarding fees
- SpotDev, UK pricing guide in sterling, verified July 2026
- Whitehat SEO, UK pricing guide including contractual terms, verified July 2026
- Project36, total cost of ownership analysis and published subscription pricing
- TheMarketingblog, UK pricing guides for small business and enterprise, March 2026
- HubSpot Terms of Service on mid-term downgrades and seat repricing
- Reporting on annual renewal uplifts on Professional and Enterprise contracts
- SparkToro and Similarweb, 2026 zero-click study
- Agarwal and Sen, randomised field experiment on AI Overviews, 2026
- BrightEdge and Semrush, AI Overview query coverage by sector
- Search Engine Land reporting on organic traffic data, January 2026
- UK agency directories and partner listings, 2026
Want a second opinion on an inbound proposal?
Send it over with the platform tier you have been quoted. You get the total-cost maths back, including when the agency is right and I am the wrong channel for you.
Related reading: the best SEO agencies for lead generation covers organic search in more depth, the best PPC agencies covers the faster channel and declares my interest in it, and the best B2B lead generation companies covers outbound alternatives. If you want to talk about PPC lead generation while inbound builds, the form at the top of this page is the fastest route.