Fenster review 2026 — pros, cons and alternatives

What is Fenster?

Fenster is a Danish scheduling and route management tool built specifically for window cleaners. It covers subscription management, a simple customer database, and basic route planning. Fenster is aimed at small businesses with 1–5 employees (max 8), and it is deliberately designed as a narrow, focused product — not a broad field service platform.

At Clientflow we have migrated several customers from Fenster, so we have seen the product both from the user side and from the data integration side. This review is meant as an honest assessment — not a marketing pitch. If Fenster fits you, it's also OK to know that.

Who is Fenster built for?

Fenster nails it for one specific user: a solo window cleaner or a small business with 1–3 employees, who has recurring subscription customers, runs the same routes every week or month, and doesn't need anything other than a customer database, a calendar, and a simple way to plan the day.

If that's you, Fenster is easy to get started with, cheap on entry (from 99 kr/mo), and covers pretty much what you need. You don't need to read further — Fenster is probably the right choice for you.

This review is primarily for those who are either 1) past 3-5 employees, 2) want to capture leads from their website, 3) considering expanding into other trades, or 4) need GPS tracking, AI route optimization, or advanced customer communication. For you, Fenster hits the ceiling fast.

Fenster — pros

• Low entry price. The Solo plan starts at 99 kr/mo, which is among the cheapest on the market.
• Narrow and focused. The tool is built for window cleaners — no features you don't need are in the way.
• Simple learning curve. Most teams are up and running within an hour. You don't need a training course.
• Well-established in the niche. Many Danish solo window cleaners use Fenster and know it. It's a safe choice if you don't want to experiment.
• Danish support and Danish language. You speak Danish with support, and the product is not a translated American app.

Fenster — cons

• Hard ceiling on team size. Max 5–8 employees. Grow to 10 and you have to switch.
• Window cleaners only. If you expand to cleaning, landscaping or plumbing, Fenster doesn't cover it.
• No lead management. You can't capture leads from your website inside Fenster. The feature doesn't exist.
• No GPS tracking. You can't see where your employees are. For customer service (precise ETAs) and payroll, this is a real gap.
• Manual route planning. Fenster has no AI route optimization — you plan it yourself. That works if your routes are static, but costs time and fuel if you want to drive optimally.
• No team chat or workflow automation. Communication happens outside the system (SMS, phone, Messenger).
• Dated desktop UI. Mobile is OK, but desktop feels like software from 2015.
• SMS price. 0.375 kr/each on top of the subscription — it adds up at 200+ SMS per month.

Fenster pricing in 2026

Fenster's pricing starts at 99 kr/mo for the Solo plan with limited functionality. The Pro plan (smaller teams) starts at 399 kr/mo and Premium at 1,199 kr/mo. On top of that come 199 kr/mo per extra user on Pro and 0.375 kr per SMS.

By comparison, Clientflow starts at 199 kr/mo (Starter) + 99 kr per user but includes unlimited customers, SMS reminders, integration with Dinero/Billy/e-conomic, and — from the Professional tier (699 kr/mo) — lead module, telephony integration and reports. Workflow automation and GPS tracking are on Enterprise.

Honest verdict on price: if you're solo and don't need anything extra, Fenster is cheaper. If you're 3+ employees and use lead module, GPS or automation, Clientflow is cheaper once you count everything in.

Alternatives to Fenster

If Fenster no longer fits, you have a few Danish options:

• Clientflow — complete field service platform for all service businesses. Lead module, GPS, AI route optimization, invoicing and customer portal in one app. Scales from solo to 50+ employees. See Clientflow vs Fenster or Alternative to Fenster.
• Previsto — also Danish, primarily for window cleaners but covers slightly broader trades. Good if you're very close to Fenster's niche. See Clientflow vs Previsto or Alternative to Previsto.
• Minuba — established order management platform for tradespeople. Broader trades, but not specialized for window cleaning or subscription-based service. See Clientflow vs Minuba or Alternative to Minuba.
• Ordrestyring.dk — simple order management for smaller tradespeople. Less built-out than Minuba. See Clientflow vs Ordrestyring or Alternative to Ordrestyring.
• SkvizBiz — window-cleaner-focused competitor. Similar in scope to Fenster. See Clientflow vs SkvizBiz or Alternative to SkvizBiz.

Recommendation

Fenster is a good tool within its narrow niche — solo window cleaners with recurring subscription customers and simple needs. If that's you, stay on Fenster. You save money, and you get what you need.

But if you're growing — more employees, leads from the website, expansion to other trades, or need for GPS, AI route optimization and automation — Fenster becomes a bottleneck. We've migrated several customers who hit exactly that point, and the transition is typically completed within 1–2 business days with no data loss.

If you want a concrete comparison, start with Clientflow vs Fenster where we go through feature by feature. Or read our guide to alternatives to Fenster if you already know you've outgrown it.

Frequently asked questions

Thanks for reading. If you have questions about Fenster, Clientflow or migration between them, you're welcome to write to me directly — I answer every inquiry personally.