How does tech stack targeting reduce CAC?

Traditional channels target by job title or interests. A 'Software Developer' on LinkedIn could be using any tech stack. Idlen targets by actual technology usage—so your React component library only reaches React developers, your Python SDK only reaches Python developers. Zero wasted impressions.

What's the typical CAC improvement?

Our advertisers see an average 52% CAC reduction. This comes from: 1) Higher CTR (more clicks per dollar), 2) Better targeting (fewer wasted impressions), 3) Higher conversion rates (better-fit trials). Some see up to 70% improvement.

How does pricing work?

We offer both CPM (cost per thousand impressions) and CPC (cost per click) pricing. CPM starts at €35 and is ideal for awareness. CPC is ideal for direct response campaigns. No setup fees, no minimums, no hidden costs.

Can I prove ROI to my board/investors?

Yes! Our dashboard shows full-funnel metrics: impressions, clicks, CTR, cost per click, conversions, and cost per conversion. You can export reports and track attribution from first impression to paid customer.

How does this compare to Google/LinkedIn?

Google Ads lacks tech stack targeting—you're targeting keywords, not developers. LinkedIn targets job titles, not actual technology usage. Idlen is the only platform that targets developers based on what they're actually building with.

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HomeAdvertisersUse CasesReduce Developer CAC by 52%

Reduce Developer CAC by 52%

Stop wasting budget on developers who will never convert. Tech stack targeting ensures every impression reaches your ideal customer profile.

-52%average CAC reduction

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Who is this for? Startups, Scale-ups, VC-backed companies with marketing efficiency targets

Problems We Solve

Sound familiar?

CPMs on developer-focused channels keep rising

Most impressions reach developers who'll never need your product

LinkedIn campaigns target 'developers' but waste budget on non-technical roles

Google Ads lack granular tech stack targeting

High CTR channels like Reddit have low conversion rates

Can't justify ad spend to the board with current metrics

Our Solution

How Idlen solves this

Tech stack targeting = zero waste on irrelevant developers

Only pay for impressions to developers using technologies you integrate with

Higher CTR (2.5-3.5%) means more clicks per dollar

Better-fit trials mean higher trial-to-paid conversion

CPM-based pricing with transparent, predictable costs

Real-time dashboards to prove ROI to stakeholders

Key Benefits

Zero Waste Targeting

Don't pay to show your PostgreSQL tool to MongoDB developers. Precision targeting by tech stack.

Predictable Costs

CPM and CPC pricing with no hidden fees. Know exactly what you'll spend before you start.

A/B Test Everything

Test creatives, audiences, and messaging to continuously optimize your CAC.

Attribution Clarity

Full-funnel tracking from impression to revenue. No more guessing what's working.

Retargeting Included

Re-engage developers who clicked but didn't convert. Included in your campaigns.

Scale Efficiently

As you optimize, scale budget without scaling CAC. Efficient growth path.

CAC Comparison by Channel

Metric	Traditional	With Idlen
Average CPM	$40-80	$35-55
Targeting precision	Job title based	Tech stack based
Click-through rate	0.1-0.5%	2.5-3.5%
Trial-to-paid	8-12%	18-25%
Resulting CAC	$200-500	$80-150

What Our Clients Say

"We were burning $30K/month on LinkedIn with a $380 CAC. Switching to Idlen dropped our CAC to $165 in the first quarter. The board finally stopped questioning our marketing spend."

Marcus Rodriguez

Series A DevTools Startup

Frequently Asked Questions

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The CAC Problem in Developer Marketing

Developer marketing is expensive. And it's getting worse:

LinkedIn CPMs have increased 35% year-over-year
Google Ads for developer keywords are fiercely competitive
Content marketing takes 12-18 months to show ROI
Conference sponsorships cost $50K+ with unclear attribution

But the real problem isn't the cost—it's the waste.

Where Your Budget Actually Goes

On traditional channels, most of your budget reaches the wrong developers:

Your Product	Who You're Targeting	Who Actually Sees Your Ads
React component library	React developers	Anyone with "developer" in their profile
Python API client	Python developers	Developers using any language
PostgreSQL tool	PostgreSQL users	Developers using any database

This mismatch is why CAC is so high. You're paying to reach 100 developers when only 10-15 would ever consider your product.

The Idlen Difference: Tech Stack Targeting

Idlen solves this with tech stack targeting:

We detect actual technology usage — not self-reported skills
You target by specific combinations — "React + TypeScript + Tailwind"
Every impression reaches a potential customer — zero waste

Example Targeting Setup

Target: Frontend developers building with modern stack
- React OR Vue (not Angular—different audience)
- TypeScript (signals quality-focused developers)
- Tailwind OR Chakra UI (modern styling approach)
- NOT using competitor X (avoid churn-likely users)

The Math: Why CAC Drops

Let's compare a $10,000 campaign:

Metric	LinkedIn	Idlen
CPM	$65	$45
Impressions	153,846	222,222
CTR	0.3%	2.8%
Clicks	462	6,222
Trial rate	3%	8%
Trials	14	498
Trial-to-paid	10%	22%
Customers	1-2	109
CAC	$5,000-10,000	$92

The difference isn't magic—it's precision targeting and perfect timing.

ROI Calculator Logic

Your potential savings:

Current monthly ad spend: $X
Current CAC: $Y
Idlen estimated CAC: $Y × 0.48 (52% reduction)
Monthly savings: (Current CAC - Idlen CAC) × Monthly new customers

Most companies see payback in the first month.