The outbound agency cost autopsy: why software wins in 18 months

TL;DR

We asked 12 European B2B scale-ups what their outbound agency actually delivered last quarter. Median: €18,000 spent, 4 qualified meetings, 0 closed-won. That is €4,500 per meeting and infinity per customer.

• Agency retainers in Europe: €8K–€25K/month. Per-meeting pricing: €350–€800. Per-SQL pricing: €1,200–€2,800.
• Across 12 anonymised scale-ups, agency-managed motions averaged €4,200 per qualified meeting; AI-platform motions averaged €380; an 11× delta.
• 73% of B2B buyers actively avoid suppliers who send irrelevant outreach (Gartner, 2025). Sub-1% reply rates are now structural, not tactical.
• Migration from agency to AI GTM platform pays back within 18 months for the median customer in this dataset; within 6 months for the top quartile.

Introduction

The outbound agency model is broken. Not “evolving”. Not “under pressure”. Broken; at the unit-economics level, in the math that determines whether the model can pay for itself.

We will show you the math. Then we will show you the alternative. Then we will show you a 90-day migration plan that does not break the motion you currently have. This article is for the CMO, founder or CFO who is staring at a renewal invoice from House of Marketing, Belkins, Memory Blue, Operatix or any of the dozens of European B2B outbound shops, and asking the obvious question: what am I actually buying?

We pulled comparable cost and outcome data from 12 anonymised Belgian, Dutch, French and UK B2B SaaS scale-ups in the €3M–€20M ARR band over the last three quarters. The median is what you read above. The dispersion is bad. The tail is worse.

What outbound agencies actually charge in 2026

There is no single price. There are three pricing models and the vendor will pick whichever generates the highest expected revenue per customer.

Retainer model. €8K to €25K per month. Includes a fractional SDR team (usually 0.5 to 2 FTE-equivalent), copywriting, list-building, sequencing and reporting. Most common with mid-market agencies (House of Marketing, Belkins, Sopro, Memory Blue, Sales Force Europe).

Per-meeting model. €350 to €800 per booked meeting. Looks attractive on paper but creates a perverse incentive: the agency optimises for booked not for qualified. The conversion from booked to qualified is typically 60–70%, which means the real cost per qualified meeting is €500–€1,200.

Per-SQL model. €1,200 to €2,800 per qualified opportunity (defined as a meeting that progresses to a discovery and qualification). The most expensive on paper, sometimes the cheapest in reality if the agency holds itself to the qualification standard. Almost no agency does.

To these you add ramp time (typically 6 weeks before the first qualified meeting), opportunity cost of internal management (1–3 hours per week of CMO or RevOps time), brand risk from off-spec outreach (small but real), and switching cost when the engagement ends (the average European agency relationship runs 14 months before churn).

Why response rates have collapsed below 1%

Three structural forces compressed the outbound funnel between 2022 and 2025. None of them is reversible.

Buyer behaviour. Gartner’s 2025 research shows 73% of B2B buyers actively avoid suppliers who send irrelevant outreach. Gartner’s 2026 research shows 67% prefer a rep-free buying experience and 45% used AI in their last purchase decision. 6sense’s 2025 B2B Buyer Experience Report shows 84% of deals are won by the first vendor contacted, that 81% of buyers have decided before reaching out, and that 70% of the buyer journey is anonymous. The window in which outbound matters is small and in front of the rep, not after.

Inbox saturation. A typical European VP-level prospect now receives 47 outbound emails per week (industry benchmark, mid-2025) versus 14 in 2019. The reply rate per individual email has collapsed accordingly.

AI-on-AI. Buyers’ inboxes increasingly use AI filters that recognise AI-drafted outreach. Microsoft, Google and Apple have all shipped sender-classification heuristics that suppress visibility of generic outbound. This is the irony of the current moment: agencies invested in AI to scale their output, and the same AI on the receiving end is filtering it.

The combined effect is that the median agency reply rate has fallen from ~3% in 2019 to <1% in 2025. The unit economics break at sub-1%. This is the autopsy.

The agency unit economics nobody publishes

Agencies do not publish their own unit economics for an obvious reason: the math does not flatter them.

Take a representative European agency engagement. €18K monthly retainer. The agency assigns 1 SDR-equivalent and a part-time copywriter. That SDR sends 1,500 emails per month at 0.8% reply rate, generating 12 replies. Of those, 6 are positive enough to move to a meeting attempt; 4 actually book; 3 show up; 2 qualify. Cost per qualified meeting: €18,000 / 2 = €9,000.

The agency reports “12 replies, 4 meetings booked, 2 SQLs”. The customer remembers the 4 meetings number and pays the next invoice.

The other unit economic that nobody publishes is agency churn cost. The average European outbound agency relationship runs 14 months. The hand-off cost; knowledge transfer, re-onboarding, sequence rebuild, brand recalibration; at the next vendor is typically two months of retainer. Annualised, that is a 14% drag on top of the meeting cost.

Add the brand risk of off-spec outreach (the agency that pitches your competitor’s positioning verbatim), and the cost of CMO supervision time, and the true loaded cost of an agency-driven qualified meeting in 2026 is closer to €5,500.

As Toni Hohlbein of Revenue Formula notes from the public-SaaS data:

“71 public SaaS companies; the vast majority spend $2 or more cash to acquire $1 of additional revenue.”

The agency model is one of the line items pushing that ratio.

Software vs agency: the actual cost comparison

This is the table that did the most damage to the agency model in the last 18 months.

The 18-month payback assumption underlying the title of this article comes from this table: at 50 SQLs per year; a modest target for a €5–€20M ARR scale-up; the cost differential funds an internal GTM engineer, the platform licence, and approximately €60K of contingency, with money left over.

Where agencies still beat software in 2026 (steelman)

We will not pretend agencies are obsolete. Four scenarios still favour an agency, and intellectual honesty matters.

Enterprise outbound to named accounts above $100K ACV. When the buying group is 12+ stakeholders, the cycle is 12+ months, and the value of one closed-won is a fraction of the total bet, the relationship work cannot be automated. A senior agency partner who has called the same 200 accounts for five years has institutional context that no platform can replicate.

Compliance-heavy markets where the cost of one off-spec message is six figures. Pharmaceutical sales, defence, regulated finance. The supervisory overhead for an internal AI motion in these markets exceeds the cost of an agency that has its own compliance infrastructure.

Multilingual coverage where you have no native operator. A Belgian scale-up expanding into the Nordics or DACH may genuinely lack the language and cultural context to run outbound internally. A specialised agency can be the bridge for 12–18 months.

Brand-sensitive launches. A category-creating product launch that requires custom messaging per account is an agency motion until the messaging stabilises.

If your situation fits one of these four, the agency may still be the right answer. If it does not, the math we showed you applies.

The 5 questions to ask your agency before next renewal

Bring these to the renewal meeting. Note who answers and how confidently.

1. What is your blended cost per qualified meeting (not booked meeting) in our account over the last 90 days?
2. What is your reply rate over the last 90 days? Show the raw numbers, not the dashboard.
3. Which messages were AI-drafted, and how do they comply with EU AI Act Article 50 disclosure requirements (effective August 2026)?
4. If we cancel today, what artefacts do we keep; sequences, lists, enrichments, learnings?
5. What is your retention rate among customers above €15K monthly retainer over the last 12 months?

If the answers are evasive, you have your answer.

A migration playbook: agency to AI GTM platform in 90 days

We have run this migration with 18 portfolio companies at Stretch Innovation. The plan below is the consolidated version.

Weeks 1–2: data and CRM audit. Inventory the lists, the enrichment sources and the CRM state. Most agency engagements leave the customer’s data in a state that requires 40 hours of cleanup before any platform can be deployed productively. Do this before the platform contract starts.

Weeks 3–6: signal sources migrated. Move the intent data, the firmographic enrichment and the dark-social listening from the agency’s accounts to the customer’s accounts. Renegotiate vendor contracts where the agency held the licence on your behalf (this is more common than you would expect).

Weeks 7–10: workflows rebuilt. Translate the agency’s playbook into platform configuration. The platform should reach parity with the agency’s output by week 10; not perfection, parity.

Weeks 11–12: agency exit. Cancel with the contractual notice. Run both motions in parallel for the final 30 days to validate the platform’s output. Document the handover.

Month 4 onward: optimise. The platform’s output should exceed the agency’s by month 4 on cost per qualified meeting, and approach parity on absolute meeting volume by month 6. By month 12, the gap is structural.

As Eric Nowoslawski of Growth Engine X puts it:

“The best email you send is the one where you do 10 minutes of research.”

The platform compresses that 10 minutes into 90 seconds at scale, which is what makes the migration math work.

Conclusion

The outbound agency model is not coming back. The math is the math. €18K for 4 meetings and zero closed-won is not a bad quarter. It is the median quarter, repeated three times in a row, across 12 companies in our dataset.

If you are paying €15K+ per month to an outbound agency right now and your reply rates are below 1%, the question is not whether to migrate. It is whether you migrate before or after the next renewal.

We built the migration calculator to make the conversation precise. Get your custom cost comparison →

Sources

• Gartner, Future of Sales 2026
• 6sense, B2B Buyer Experience Report 2025
• ChartMogul, SaaS Growth Report 2025
• McKinsey, State of AI 2025
• Toni Hohlbein, Revenue Formula
• Eric Nowoslawski, Growth Engine X
• Adam Robinson, RB2B
• Kyle Poyar, Growth Unhinged

Related reading on Falora

• GTM engineering vs growth marketing
• AI SDRs vs human SDRs: 7 conditions where AI loses
• The Autonomous GTM Maturity Model
• Schaalbare B2B groei zonder bureau (NL)

About the author

Jeroen De Broyer is co-founder of Falora.ai. He writes on LinkedIn.