You don't need a designer or a logo file to start. You need your website.
On sign-up, paste your website address. Quillus reads your public site and pulls out the things that make your postcards look like you:
We show you what we found. Fix anything that looks off — swap the logo, nudge a color — or just accept it. This is your brand kit, and every postcard uses it automatically.
That's the setup. From here you can start a campaign whenever you finish a job. No logo file hunting, no design tools.
Don't have a website? No problem — you can upload a logo and pick colors by hand instead.