Most SMEs hiring a conversion optimisation company are paying for reports, not results. They receive weekly PDFs full of impressions and click-through rates while their cost per acquisition quietly climbs and their Google Ads account drifts in the wrong direction. That gap — between analysis and action — is where most agency relationships break down.
This article explains what a genuine conversion optimisation company should deliver, where traditional approaches fall short for smaller businesses, and how AI-driven account management is changing what's actually possible without the agency overhead.
What a Conversion Optimisation Company Actually Does
A conversion optimisation company is a specialist service that improves the rate at which paid traffic turns into customers, leads, or sales. It operates across bid strategy, audience targeting, landing page alignment, keyword sculpting, and budget allocation — not just the ad copy itself.
The best definition worth quoting directly: a conversion optimisation company identifies the specific points in a paid search funnel where spend is wasted or intent is mismatched, then makes structured changes to fix them. That's it. Everything else — the dashboards, the decks, the quarterly reviews — is secondary to that core activity.
In practice, the work involves pausing keywords that consistently fail to convert, adjusting bids based on device, location, and time-of-day performance data, and shifting budget from underperforming campaigns to those generating return. It's iterative, granular, and genuinely time-consuming.
For SMEs, the challenge is that this kind of ongoing management usually comes wrapped in a retainer that starts at £1,500 per month before you've spent a single pound on ads. We spent nine years running a marketing agency, and we watched that cost kill otherwise viable campaigns before they had a chance to mature.
Understanding what paid search actually involves is a useful starting point before evaluating any provider.
Why Traditional Conversion Optimisation Falls Short for SMEs
The economics of a conversion optimisation company are built around larger accounts. Agencies need to justify senior staff time, and that becomes difficult when a client's monthly ad spend is £2,000 rather than £20,000. The result is that SME accounts tend to get reviewed less frequently, optimised less aggressively, and managed by more junior staff.
This isn't a criticism of agencies as businesses — it's a structural reality. When you're running an agency, you allocate attention proportional to revenue. A client spending £1,500 per month on management fees simply cannot absorb the same hours as one spending £8,000.
The operational consequence is that small business accounts often go weeks without meaningful changes. Bids stay static. Underperforming ad groups keep running. Budget allocation reflects last quarter's decisions rather than this week's data. By the time the monthly report arrives, the damage is done.
PPC management fees for SMEs often represent a disproportionate share of total ad investment, which makes the value calculation even harder to justify when optimisation is inconsistent.
There's also a skills gap at the account level that rarely gets discussed. Conversion rate optimisation across paid search requires understanding match types, Quality Scores, auction dynamics, and landing page relevance simultaneously. Most generalist account managers — the ones handling SME accounts at mid-tier agencies — are competent but stretched. Deep optimisation work requires focused attention that those accounts rarely receive.
AI Agent vs Agency: What SMEs Are Actually Comparing
The conversation has shifted. SMEs evaluating a conversion optimisation company in 2026 are increasingly comparing human-led agencies against AI agents that manage accounts directly. These aren't the same thing, and the distinction matters.
An AI agent logs into your Google Ads account, makes bid adjustments, pauses underperforming keywords, reallocates budget between campaigns, and sends you a plain-English summary of what changed and why. It operates continuously rather than monthly. It doesn't have a minimum spend threshold that makes your account uneconomical to manage properly.
| Approach | Typical Monthly Cost | Review Frequency | Account Access | Reporting |
|---|---|---|---|---|
| Traditional agency retainer | £1,500–£5,000+ | Monthly or fortnightly | Managed externally | PDF/dashboard |
| Freelance PPC consultant | £600–£2,000 | Weekly at best | Managed externally | Email summary |
| AI agent (e.g. Overtime) | Fraction of agency cost | Continuous | Direct account access | Automated summaries |
The trade-off worth acknowledging honestly: an AI agent won't sit in a strategy meeting with you, won't rewrite your landing page copy, and won't build a brand positioning framework. If you need that breadth of service, an agency relationship still makes sense. But if the core problem is that your Google Ads account isn't being optimised frequently enough — which is the most common problem we saw across nine years of agency work — an AI agent addresses that directly.
Comparing a PPC agency against an AI agent in detail is worth doing before committing to either approach.
How Conversion Optimisation Actually Moves Performance
The changes that move conversion rates in paid search are rarely dramatic. They're the accumulation of dozens of small, correctly-timed decisions: pausing a keyword that's spent £200 without a single conversion, increasing bids on a device type that converts at twice the account average, adding a negative keyword that's been bleeding budget to irrelevant searches.
None of these changes are complicated. All of them require someone — or something — to actually look at the account regularly enough to catch them.
When we managed accounts manually, the rhythm was roughly weekly reviews for active campaigns, with deeper monthly analysis. That cadence was adequate for large accounts where changes were predictable. For smaller accounts with more volatile traffic, it was often too slow.
The operational detail that matters here: Google's auction changes in real time. A competitor pausing their campaigns on a Tuesday afternoon creates an opportunity that lasts hours, not weeks. Manual management, even good manual management, moves too slowly to capture those moments consistently.
Paid search optimisation at the account level is less about grand strategy and more about consistent, timely execution.
What to Look for in a Conversion Optimisation Company
If you're evaluating a conversion optimisation company — whether that's an agency, a consultant, or an AI agent — the questions worth asking are operational rather than strategic.
How frequently are bids reviewed and adjusted? What's the process for pausing underperformers, and how quickly does that happen after a keyword crosses a cost threshold? Who has direct access to the account, and are changes made in real time or batched monthly? What does the reporting actually show — activity or outcomes?
These questions expose the gap between companies that optimise and companies that report on optimisation. The former make changes. The latter document the need for changes and schedule them for next month's call.
For SMEs, the cost of Google Ads is already a meaningful commitment. Paying a management premium on top of that spend only makes sense if the management is genuinely active.
One opinion worth stating plainly: most SMEs do not need a full-service conversion optimisation company. They need their existing Google Ads account managed more frequently and more precisely than it currently is. That's a narrower, more solvable problem than it's sometimes made to appear.
Overtime addresses exactly that problem — continuous account management, real changes made directly in the account, and plain-English summaries that tell you what changed and why, without the agency overhead.
Conversion Optimisation Without the Agency Model
The agency model for paid search management was built in an era when account management genuinely required human expertise at every step. Reading auction data, adjusting bids, interpreting performance trends — these required a trained analyst with account access and time to act.
That assumption has changed. The analytical work that underpins conversion optimisation — identifying underperformers, flagging budget inefficiencies, recognising bid adjustment opportunities — is now something AI handles with more consistency and at greater frequency than most agency teams can match for small accounts.
This doesn't make agencies obsolete. It makes them more appropriately suited to accounts where strategic input, creative direction, and senior advisory work justify the cost. For accounts spending under £10,000 per month on ads, the marginal value of human agency management often doesn't match the fee.
If you want to understand the full picture of how AI-driven PPC agency models compare to traditional ones, that's a useful read before making a decision.
Overtime's pricing structure is designed specifically for SMEs who need active management without the retainer economics that make agencies unworkable at smaller spend levels.
The shift worth watching is that conversion optimisation is becoming less about who you hire and more about how continuously your account is actually managed. Frequency of intervention, not quality of strategy documents, is what moves cost per acquisition over time.
For any SME running Google Ads, the most important question to ask a conversion optimisation company — or an AI agent — isn't what their methodology is. It's how often they actually touch the account.
Overtime manages your Google Ads account the way a conversion optimisation company should: continuously, transparently, and without the overhead that makes agency management impractical for most SMEs. If your account hasn't been actively optimised this week, that's worth fixing today.
---
Frequently Asked Questions
What does a conversion optimisation company do with a Google Ads account?
A conversion optimisation company analyses campaign performance, adjusts bids, pauses underperforming keywords, reallocates budget, and refines targeting to reduce cost per acquisition and improve return on ad spend. The best ones make these changes continuously, not just during scheduled monthly reviews.
How much does a conversion optimisation company typically charge SMEs?
Agency retainers for paid search management typically start between £1,000 and £2,000 per month for SME accounts, often before ad spend is factored in. Freelance consultants can cost less but usually offer lower review frequency. AI agents offer a third option with lower overhead and more frequent account intervention.
Why should SMEs care about how often their account is reviewed?
Google Ads auctions change in real time. Underperforming keywords accumulate wasted spend every day they remain active. The more frequently an account is reviewed and adjusted, the faster those inefficiencies are caught and corrected — which directly affects how far your budget goes.
Can an AI agent replace a conversion optimisation company for a small business?
For most SMEs whose primary need is consistent, active account management rather than creative strategy or brand consultancy, an AI agent addresses the core problem more cost-effectively. It won't write landing page copy or run workshops, but it will make bid and budget decisions more frequently than most agencies do at the SME price point.
Do conversion optimisation companies need direct access to your Google Ads account?
Yes. Any service making real changes — adjusting bids, pausing keywords, shifting budget — needs direct account access. If a provider is only sending recommendations without implementing them, the optimisation loop is incomplete and dependent on you or someone else taking action on their advice.