AI for copywriting that drafts in your voice, not a generic one
Drafts ad copy, landing pages, emails, and product descriptions in your specific voice through Brain AI.
Pulls hooks and structures from your past best-performers, not from a stock template library.
Adapts to client briefs in seconds and tracks which lines convert.
Every copywriting workflow in one platform
Copywriting work runs across ad copy, landing pages, emails, product descriptions, and the brief work that sits between every output. Sintra runs that work for you. Twelve specialised functions across drafting, voice consistency, performance tracking, and client comms, all sharing your voice and your client briefs through Brain AI.
What slows down a copywriter
AI copywriting should sound like you, not like every other AI-written page. These are the drains every writer runs into.
Generic AI output sounds generic
Standard AI tools produce copy that reads exactly like other AI-written copy. The voice is missing.
Brief interpretation takes a half-day
The brief is loose, the brand voice notes are in three places. You spend two hours figuring out what to write before you write.
Variations eat the afternoon
Ten headlines, twenty subject lines, fifteen CTA options. By the time you've drafted them, the rest of the day is gone.
Performance feedback doesn't reach the writer
Two headlines won, eight didn't. You don't know which ones, and the next batch is guesswork.
Client revisions go in circles
The first draft gets revised, the revision gets re-revised, the final reads like the first.
Voice consistency slips on long projects
By page twenty, the voice has drifted from page one. The client notices on review.
How AI for copywriting runs your work, function by function
Each role is built for one part of the copywriting workflow. Brain AI holds your voice, client briefs, and past best-performers.
Draft ad copy, headlines, and CTAs
Write landing page and sales page copy
Build email sequences and subject lines
Generate product descriptions at scale
Run variation generation on demand
Audit copy for voice consistency
Pull performance data across campaigns
Draft client briefs and revision notes
How copywriters actually use AI for copywriting
Five workflows that recover the drafting hours.
Ad copy variations
Drop the brief and three past best-performers into Brain AI. AI drafts twenty headline variations and ten body copy options in your voice. Picking and refining replaces drafting from scratch.
Landing page draft
Drop the offer and the audience profile. AI drafts the full landing page including hero, social proof framing, objections section, and CTA copy. Hours-to-draft drop from a day to an hour.
Email sequence
Drop the campaign goal. AI drafts a seven-email sequence with subject lines, body copy, and CTAs that escalate. The sequence ships the same day.
Product description scale
Drop the product catalog. AI drafts unique descriptions in your client's voice for every SKU. What used to be a catalog project becomes an afternoon.
Voice consistency audit
AI runs the full draft against the brand voice profile in Brain AI and flags every drift. Long projects stay consistent across every page.
Twelve AI tools for copywriting, one subscription
Each role is built for one part of the copywriting workflow. They share your voice, client briefs, and past best-performers through Brain AI.
Brain AI keeps every output sounding like you
Drop your past best-performing copy, brand voice notes, and client briefs into Brain AI. Every output reads from it before it writes. The ad copy, the landing page, and the email sequence all sound like you, or like your client, because they share one voice profile. 93% of users see response accuracy improve once Brain AI is populated.
93%
Of users report increase in response accuracy after filling Brain AI.
5.2 hours
Saved for users per week by eliminating repetitive context-setting.
As users continue to engage with Brain AI, they experience ongoing improvement in their critical thinking skills and cognitive abilities.
Plugs into the copywriting stack you already use
Google
Drive
Gmail
Google Calendar
Outlook
Notion
Quickbooks
Microsoft
Strava
Google
Analytics
Google
Drive
Gmail
Google Calendar
Outlook
Notion
Quickbooks
Microsoft
Strava
Google
Analytics
Google
Drive
Gmail
Google Calendar
Outlook
Notion
Quickbooks
Microsoft
Strava
Google
Analytics
How to start
Three steps from sign-up to your first AI-drafted headline.
Connect your stack
Link your email, project tool, and document storage. Set up takes ten minutes.
Fill Brain AI
Drop in three of your past best-performing pages and your voice notes. The system trains within an hour.
Run the first draft
Ask AI to draft headlines for your current brief. Real output before the next client review.
With great powers
comes great privacy.
Encrypted by design
From your first login to the last addition in your business knowledge vault, every interaction is encrypted in transit and at rest. This means that neither Sintra nor any third party can access your files or analytics.
Full Data Ownership
"Your content, your strategy, your AI - they belong entirely to you. At any time, you can delete your data or export it. We don’t train models on it or resell it, and your Brain AI is built exclusively on your own assets.
GDPR Compliant
We follow the highest standards of data protection under the GDPR framework. Your personal information is collected and stored transparently - with clear rights to access, modify, or delete your data at any time.
Pricing built for working copywriters
One subscription gives you all 12 functions, Brain AI with multiple voice profiles, and the full integration list. No per-word fees, no per-project charges. 14-day money-back guarantee on your first paid month.
Used by more than
50,000+ founders.
I can’t recommend SintraAI enough. It’s like having a personal business coach 24/7, mapping out steps to grow my company and clarifying my priorities. I feel a renewed sense of focus and control every day.
December 29, 2024 • Socrate Concepcion • US
Each AI bot tackles my to-do list, from scheduling tasks to crawling my website for SEO tips. I love how it set up calendar reminders for all my commitments. Sintra.ai is well worth every penny, especially for a busy single-person business.
December 14, 2024 • Jennifer Glenn • US
As an entrepreneur launching a new venture, Sintra.ai has made a real difference. The AI assistants are like personal staff I can rely on. And whenever I needed support, the team was on point. A must-try for any budding business!
December 21, 2024 • Custódio Barreiros • HU
I once had a large team, and although I loved my helpers, they needed constant motivation. With Sintra, there’s no drama, just new ideas that I can simply accept or reject. It’s a huge relief—100% recommended.
December 26, 2024 • Holly Wehde • US
Hiring Sintra was a great decision for my struggling boutique. They handle social media posts, guide my ads, and even offered a solution for double social media pages. Now I can focus on my inventory and customers.
December 17, 2024 • Michele Davis • US
Signed up for Sintra X—it felt overwhelming at first, but once it understood how I think, it turned into a creative powerhouse. Support is top-notch, and the daily integrations impress me.
Dec 10, 2024 • Sami Liftoff • US
I’m not usually one to give top marks, but once I got comfortable with Sintra’s 12 helpers, I was blown away by their efficiency. They churn out so many analytical ideas I have to pause and digest them. It’s sometimes overwhelming, but in a good way.
December 29, 2024 • lars • DK
Sintra integrates with all my favorite tools and these little helpers automate my tasks in a huge way. They actually learn my company’s style day by day. It’s a massive step up from generic AI chats.
December 30, 2024 • Michelangelo • IT
My life is simpler with Sintra. It handles content creation, next steps, brainstorming, and copy. I highly recommend it if you want to free up mental space for what truly matters in your business.
December 28, 2024 • Lionel D'Alvia • US
My “team” in Sintra knocks out tasks like magic, offering fresh ideas for efficiency and better customer outreach. It’s a relief knowing I have AI assistants ready to go around the clock.
December 31, 2024 • Kat Angelica • US
I’ve only been using Sintra for a couple of weeks, but the experience has been great—especially with the social media bot reaching out to me with new ideas. The pull model feels super proactive and makes me more confident in my daily tasks.
December 30, 2024 • Bayan Qandil • US
I challenge anyone to compare other platforms to Sintra.ai and their staff—you won’t find a better customer experience. Everyone is professional, responsive, and genuinely cares about helping. Truly top-notch!
December 28, 2024 • Timothy Montjoy • US
This platform helps me like a full-time employee would. As a startup, I can’t afford extra staff, so Sintra stepped in to handle complex tasks and free me up for big-picture thinking.
December 28, 2024 • Jules Kincaid • US
I’m juggling multiple hats in my business, and these 12 AI “helpers” lighten the load. They even crack jokes and celebrate milestones with me! I saved thousands in consultant fees by letting Sintra handle SEO and content tasks.
December 30, 2024 • Michelle Smith • US
This platform helps me like a full-time employee would. As a startup, I can’t afford extra staff, so Sintra stepped in to handle complex tasks and free me up for big-picture thinking.
December 24, 2024 • Domanic R.H • US
Data-Backed Results From Real Users
+37%
Revenue growth in the first 90 days
5x
Faster content production across all channels
20h
Saved weekly on admin, support, and content work
80%
Of repetitive tasks fully automated
Run your copywriting work with AI
Twelve functions, one subscription, voice that's actually yours. Get Sintra, drop your past best-performers into Brain AI, and see your first variations within the hour.
Frequenly asked questions
Brain AI grounds every output in your voice samples. The more best-performers you upload, the sharper the voice. Standard AI tools work from a generic model; this one works from yours.
Yes. Brain AI supports up to five distinct voice profiles. Each client's tone, examples, and brief stays separate.
Variations come from your voice profile, not from a stock template library. Twenty headline options that actually sound like your past best work.
AI takes client feedback and applies it across the draft. Voice stays consistent through every round.
Freelance copywriters get the highest leverage. Multiple client voices, faster turnaround, more capacity. The 14-day money-back guarantee lets you test against your current workflow.
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