Meet Cassie - Your new AI customer service agent
From first contact to resolution - Cassie helps you deliver faster, more accurate support. An AI customer service agent that’s reliable, responsive, and surprisingly human-like.
CassieYour new AI Customer Support.
Customer support tools are easy to install - but hard to run at scale. Cassie is different. It's built to draft responses, streamline workflows, and help your team resolve issues without constant manual effort.
Knows everything about your audience, product and business.
Generates FAQs, manuals, and helpful documentation content.
Automatically drafts replies to chats on socials and emails.
Ready to answer any questions, solve any issues while you sleep.
Many businesses overlook customer support - as they usually get overwhelmed by volume.
Tickets pile up, answers repeat, and teams burn hours on routine questions, that bring in no revenue.
Cassietakes these off your plate and keeps customers satisfied.
Sintra offers on AI customer service assistant - you get a happy customer base.
Simplified onboarding on purpose
Getting started with our AI support assistant is intentionally simple. Create an account with Sintra AI, set your preferences, and let Cassie take it from there.
Start in minutes
Tell Cassie who you are, what you offer, and your support principles - so she understands your products, policies, and tone from day one.
Feed your knowledge base
Upload internal docs, help center articles, policies, and example responses into your Brain AI so Cassie can reference real context.
Setup your communications
Link your inbox or support platforms so Cassie can pull customer queries and draft accurate replies.
You review - AI drafts
Your AI customer service agent prepares replies and support content - you review and approve. Nothing is sent without your sign-off.
Use insights to improve
Get summaries of customer feedback, analyze trends, and refine your support efforts, content and training.
Your know-it-all
AI customer support
Cassie turns your customer support into a predictable, repeatable workflow that doesn’t break when volume spikes.
Resolved tickets come faster, FAQs stay current, and service quality stays high - even during peak demand.
Your team stays focused on real escalations while AI customer service agent handles repetitive responses.
Draft support replies
Create clear, accurate responses to customer emails and messages.
Generate FAQs & help content
Turn common questions into ready-to-publish documentation.
Summarize feedback & tickets
Convert volume signals into trend insights.
Personalize responses at scale
Maintain brand tone while adapting to customer intent.
Prepare knowledge base content
Build guides, manuals, and structured support docs.
Support multiple channels
Draft responses for email, chat, and comments.
Improve service quality
Highlight training gaps and suggest better reply patterns.
Highlight trending issues
Surface common problems so teams can address root causes.
Create support reports
Automatically generate summaries of feedback and resolution metrics.
Organize your support inbox
Help prioritize incoming emails by topic, urgency, or intent.
Create product manuals
Turn internal knowledge to structured manuals customers can actually use.
Your customer support,
on autopilot mode.
Faster resolutions. Frequently asked questions get answered without repeated typing.
Fewer repetitive tasks. No more copy-paste replies - Cassie drafts them for you.
Built for global teams. Responses can be crafted in multiple languages.
Boosted consistency. Brand tone and policies stay aligned across replies.
Cassie handled millions of customer conversations. To support your customers like a pro.
More than
5M+
customer messages reviewed
Available
24/7
on web and mobile
More than
30,000
businesses supported
More than
2M+
support replies generated
Built on experience - trained on
real-world support interactions
Our AI customer service agent agent is trained with insights from thousands of real customer interactions, giving her deep fluency in support language and best practices. Every pattern is translated into practical support guidance - helping teams deliver faster, more accurate replies.
Brain AI Powered Customer Service
Your AI customer service agent keeps all your support knowledge in one workspace - an encrypted index that brings together your documentation, policies, templates, and responses so nothing gets lost in translation.
1. Always up to date
Your context and docs live here - so Cassie never forgets how your support works.
2. Context that compounds
As you refine replies and content, future suggestions become more accurate.
3. One source of truth
Your messaging, tone, and policies stay consistent across every interaction.
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.
Cassie is the most ❤️ loved AI customer support agent online
Always responsive, never intrusive.
Get an AI agent for customer support that drafts replies when you need them - no noise, no flooding.
Designed for quick decisions.
Type a prompt, approve a draft, and get real work done. Edit in-line and schedule across channels in seconds.
Context-aware across support history.
Past cases, docs, and replies inform future output. Cassie pulls assets, publishes natively, and tracks what’s live.
Consistent across languages.
Support messaging stays aligned in 100+ regional contexts. Native nuance without the “machine” feel.
Learns from outcomes, not assumptions.
What gets approved or revised improves future suggestions. Every result reflects your product.
Delegates the rest to others.
When at capacity, Cassie can delegate tasks to other helpers → and work through things together.
Cassie and the alternatives
Save $400/month and hours on support operations
Trusted by leading teams worldwide
Get your first AI customer service agent for just $1 per day.
Cassie
Your dependable AI agent for customer service.
Try now - risk-free for 14 days
Not sure Cassie is right for your team?
First 14 days for free - no questions asked.
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
AI in Customer Support FAQs.
Pricing starts at $97/m for all helpers in Sintra X team. Additional savings available with annual billing.
Support available 24/7
Need help? It’s always within reach - get support that fits your schedule.
What is an AI customer service agent?
An AI customer service agent drafts accurate, context-aware replies and generates help content, reducing repetitive tasks so your team focuses on higher-value work.
How does an AI assistant for customer support help teams?
AI can draft replies instantly, pull context from knowledge bases, and suggest next best actions - freeing up time and improving response quality.
Do I still need human agents if I use an AI?
Yes. Humans remain essential for empathy, judgement, and complex issues. An AI customer support agent augments your team by handling routine inquiries and drafts.
Can Cassie respond directly to customers?
Cassie drafts responses and suggestions. Final approval and sending are controlled by your support team. This ensures accuracy and avoids unwanted automation.
Does Cassie learn our brand voice?
Yes - by feeding documentation and historical replies into Brain AI, Cassie maintains tone and guidelines tailored to your business.
Sintra is more than just Cassie
Cassie is part of the Sintra AI helper ecosystem. Beyond customer support, 11 more AI helpers are available to support sales, marketing, operations, and analytics - each specialized in their area. Work with one agent or combine them to build a fully AI-powered workflow across your business.
Vizzy
Your AI virtual assistant.
Penn
Your AI Copywriting Expert
Scouty
Your AI Recruitment Manager
Discover more of Cassie
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