6,397 reviews

Gmail AI Assistant: Read, Draft, and Send From One Chat

Send and reply to Gmail messages from a chat window

Search your inbox by sender, date, or subject in seconds

Cassie drafts in your brand voice using Brain AI memory

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14-day full money-back guarantee
2 min setup

Trusted by over 50,000+ business owners and founders

How the Gmail AI Assistant Works

Three steps. Connect Gmail, tell Cassie what you need, and she handles the inbox work for you.

1.

Connect your Gmail account

Open Sintra, go to Cassie, and select Gmail from her integrations. Sign in with Google and approve the permissions Sintra asks for. The connection finishes in under a minute.

2.

Tell Cassie what you want from your inbox

Ask in plain English. 'Show me yesterday's emails from clients.' 'Draft a reply to the last message from John.' 'Find the contract email from last Tuesday.' Cassie pulls from your inbox by date, sender, or subject and reads back what she finds.

3.

Review and send

Cassie writes the reply. You read it in chat, edit if you want a different tone, and tell her to send. The message goes out through your Gmail account with a green checkmark when it lands. Drafts, replies, Cc, Bcc, all from the same chat.

The Brain that connects your entire AI team

Sintra analyzes your brand information and workflows so every AI Helper performs tasks with precision, consistency, and full alignment to your goals.

Brain AI remembers everything about your business.

Every detail you share - from your goals and workflows to products, audiences, and insights - is securely stored and organized into a living knowledge base.

Brain AI automates what slows you down.

It scans your website to understand what you offer, how you position yourself, and the values that define your company.

Brain AI learns your business instantly.

It guides you through smart, structured prompts to uncover what makes your business unique

Sintra vs Other Gmail AI Tools

Most Gmail AI tools help you write replies or summarize threads. Sintra goes further by connecting Gmail with your wider business workflows, so emails can turn into tasks, follow-ups, content ideas, or customer actions.

OpenAI logoOpenAI logo
Claude logoClaude logo
Lindy company logoLindy company logo.
Pre-built email Helper, no agent build
Native Gmail send and reply
Inbox search by sender, date, subject
Shared brand voice memory across emails
Built for solo operators and small businesses

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

How to Set Up Gmail With Sintra

1.

Open Cassie in Sintra

Log in to Sintra and select Cassie from your Helpers list. Cassie owns the email integration. Her chat is where the Gmail connection lives.

2.

Sign in with Google

Click the Gmail connect button inside Cassie. Sign in with the Google account you want her to read and send from. Approve the permissions Sintra asks for. If you use Google Workspace, your admin may need to allow Sintra in the workspace settings first.

3.

Assign Cassie to your email workflow

Tell Cassie how you want her to handle Gmail. Daily inbox summary, draft replies for review, or scheduled tasks that send weekly customer updates. Set the pattern once and she runs it. For a daily morning brief, set up Vizzy's Daily Summarizer alongside Cassie.

4.

Test it with one email

Ask Cassie to pull the last email from a specific sender. Read what comes back. Have her draft a reply. Send it. If anything looks wrong, check the Sintra help center or write to support. Settings can be adjusted from Cassie's chat.

Used by more than
50,000+ founders.

SintraAI has been a Game-Changer for My Business!

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

Perfect for Solopreneurs—New or Seasoned

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

Additional Help from Very Organized Helpers!

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

No psychology degree needed and no drama!

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

Perfect AI Support for My Online Boutique

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

Sintra X Saved Me Time

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

Some Time They’re Too Effective with Ideas

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

SOOO much better than ChatGPT

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

So far, I love 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

I Love Using Sintra

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

Early but satisfied user

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

1st class service by everyone at Sintra.ai

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

Sintra is Amazing!

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

So Much on My Plate, But Sintra Makes It Easy

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

I Was Pleasantly Surprised with Sintra

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

50,000+ founders use Sintra
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More Sintra Integrations

Hire Your Gmail AI Assistant Today

Get Sintra X today. Connect Gmail to Cassie in under a minute. She runs the inbox so you can spend time on the rest of the business. 14-day money-back guarantee.

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Frequenly asked questions

What is a Gmail AI assistant?

A Gmail AI assistant connects to your Gmail account and runs inbox tasks for you, reading messages, drafting replies, searching by sender or subject, and sending emails from your address. In Sintra, Cassie is the helper that owns Gmail. You ask her what you need from the inbox and she handles it in chat.

How do I connect Gmail to Sintra?

Open Cassie inside Sintra, click the Gmail connection button, and sign in with the Google account you want her to use. Approve the permissions Sintra requests. Google Workspace accounts may need admin approval first. Check Sintra's help center for the current setup walkthrough.

What permissions does Sintra need to access Gmail?

Cassie needs Google permissions to read your messages and send mail through your Gmail account. Approve the scopes on the Google sign-in screen. Google Workspace admins may need to allow Sintra in workspace trusted-app settings first.

What can Cassie do with my Gmail?

Cassie reads recent emails by date, sender, or subject. She drafts and sends new messages, replies to threads, and supports Cc and Bcc. Attachments aren't supported at this time. See Sintra's help center page on email management for the current capability list.

What if Sintra cannot find an email or send a reply?

Check that Gmail is still connected in Cassie's settings. If the Google sign-in expired, reconnect. If a search pulls too many results, narrow the filter. Single sender plus a date range usually fixes it. For anything else, ask in Cassie's chat or write to Sintra support.