Welkent
Quote to invoice, for every trade.
Welkent has grown from a heat-pump quoting tool into a full operations platform for Danish tradespeople, spanning 13 main trades. It pulls building data from Denmark's public BBR registry and calculates energy use, ROI, and subsidy eligibility (VarmepumpePuljen) for heat pumps, solar, insulation, windows, and more, turning it into a branded, MitID-signable quote in minutes instead of an hour. Beyond quoting, it covers the full job lifecycle: lead tracking, invoicing with automated payment reminders, materials pricing and stock management, multi-department teams, and e-conomic integration.
Highlights
What Welkent does
Multi-trade quote engine (heat pumps, solar, insulation & more)
BBR-driven building data & subsidy calculations
Invoicing with automated payment reminders
Materials pricing & inventory management
MitID-signed digital contracts
Built with
From our engineering blog
How we built Welkent
5 Aug 2026 · 3 min read
Freezing a quote the moment it's accepted
When a customer accepts a Welkent quote, the exact content they saw is frozen as tamper-evident, append-only evidence, so it can never silently change afterward.
30 Jul 2026 · 3 min read
From a photographed receipt to an accurate VAT return
Welkent computes a business's momsangivelse from real recorded purchase VAT instead of an estimate, starting from a photo of the receipt.
18 Jul 2026 · 3 min read
Automating the part of running a trade business nobody enjoys
Welkent's rykkerflows chase unpaid invoices on a fixed schedule, with four safety rules that matter more than the reminders themselves.
1 Jun 2026 · 2 min read
Why MitID signing is off by default
Welkent's MitID e-signing is staff-gated rather than available to every account by default, enforced in both the UI and the API.
18 Feb 2026 · 3 min read
One platform, thirteen trades: Welkent's module marketplace
Instead of building a separate tool per trade, Welkent ships a shared platform with trade-specific modules a company can turn on, plus a free-form quote builder for everything else.
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