Sundaymark writes, optimizes, and manages blogs that rank on Google and keep readers coming back. No filler, no fluff — just content that pulls its weight.
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We treat every blog from a strategic, creative, and technical perspective — simultaneously.
Most blog projects fail because of poor planning, not poor writing. We start by mapping your niche, researching competitor content gaps, and building a keyword architecture that gives every article a clear job to do. Only then do we open a blank document.
Keyword research · Content gap · Calendar
We write long-form blog content that hooks readers in the first paragraph and earns its length. No padding, no generic intros — just well-structured, genuinely useful articles that reflect your brand's expertise and keep bounce rates low.
Long-form · Hook · Brand voice
Every post is optimized for on-page SEO: proper heading hierarchy, semantic keyword usage, meta descriptions, schema markup suggestions, and internal links. We stay current with algorithm changes so your strategy never becomes outdated.
On-page SEO · Schema · Rankings
Real brands, real traffic numbers, real results.
A Madrid-based sustainable fashion brand had a blog with sporadic posts and no strategy. We rebuilt their editorial plan around long-tail buyer intent keywords, published 48 optimized articles, and grew organic traffic by 5,150% — without a single paid ad.
A B2B software startup needed bottom-of-funnel content that converts. We wrote comparison guides, use-case deep-dives, and problem-aware articles. Within six months, their blog became the #1 source of qualified leads — ahead of LinkedIn and paid search.
A Madrid-based strategy consultant had expertise but no online presence. We built a blog from zero: defined her voice, mapped 60 topics, and published consistently. Within a year, three journalists cited her blog as a source and she landed two corporate keynote invitations.
We started Sundaymark because we were tired of seeing great brands publish generic content that nobody reads. Based in Madrid and working with clients across Europe and Latin America, we combine editorial craft with SEO discipline to build blogs that actually grow. Small team, sharp focus, zero outsourcing.
We spend 30 minutes learning your brand, audience, goals, and the current state of your blog. No questionnaires — just a real conversation.
We deliver a full editorial plan: target topics, keyword map, posting frequency, and a sample content calendar for the first 90 days.
Our writers produce articles according to the approved plan. You review, request tweaks, and approve — or let us post directly if you prefer.
Every month we share a plain-English report on traffic, rankings, and engagement — then adjust the strategy based on what's working.
Honest answers about blog content, timelines, and how we work.
It depends on the plan. Our Starter plan includes 4 articles per month, Growth includes 8, and Scale goes up to 16. Each article is fully researched, written, and SEO-optimized — not recycled templates.
Yes. We write in both English and Spanish, and we manage bilingual blog strategies for brands targeting audiences in Spain, Latin America, and English-speaking markets simultaneously.
That's our baseline expectation, not a bonus feature. During onboarding we develop or refine your brand voice guide, and every writer on your account works from that document before writing a single sentence.
SEO takes time — typically 3 to 6 months before significant organic traffic growth. We set realistic expectations from day one and give you monthly reports so you can see the trajectory clearly, not just the end result.
On Growth and Scale plans, yes. We request editor access to your CMS (WordPress, Webflow, Ghost, or others), handle all formatting, upload images, fill in meta tags, and schedule posts. On Starter, we deliver publish-ready Google Docs.
Every week without a content strategy is a week your competitors are ranking for the keywords your customers are searching. Let's fix that — starting this month.