Lowe's Deck Designer Alternatives (Real Limits Compared)
Lowe's Deck Designer is a solid choice, but people look for alternatives because of the fine print: Free with no purchase or account upgrade, but the material list and prices are pulled from Lowe's own inventory and the plans are not engineered or permit-ready. On top of that, material list and pricing are tied to Lowe's stock. Strong options to compare include Decks.com Deck Designer and Trex Deck Designer. Below we line up the real free limits of each — what it exports, what it watermarks, and which platforms it runs on — so you switch for the right reason.
Alternatives at a glance

Decks.com Deck Designer
Free, with limitsFree to design and download plans plus a suggested material list after a free signup, but you cannot change the framing lumber sizes and the materials are a suggested list, not a guaranteed takeoff.

Trex Deck Designer
Free, brand-lockedCompletely free with no payment and no export paywall, but every board, railing and SKU it prices is a Trex composite product, so the shopping list only works if you actually buy Trex.
Switch to one of these if…
Each card leads with its pricing and free-tier reality — pick the one whose limits you can live with.

Decks.com Deck Designer
Free, with limitsFree to design and download plans plus a suggested material list after a free signup, but you cannot change the framing lumber sizes and the materials are a suggested list, not a guaranteed takeoff.

Trex Deck Designer
Free, brand-lockedCompletely free with no payment and no export paywall, but every board, railing and SKU it prices is a Trex composite product, so the shopping list only works if you actually buy Trex.