What is Tantra
Tantra is an outbound platform with two engines, calendar invitations and cold email, both sending from your own Google Workspace mailboxes.
Open in Tantra
These open the app in a new tab. You may be asked to sign in.
Overview
Tantra is an outbound outreach platform. It helps you reach prospects at scale and route the results back to your team and your tools. Tantra sends from your own Google Workspace mailboxes, so messages come from your real domain, not a shared relay.
Tantra has two outreach engines that share one login:
- Calendar campaigns send Google Calendar invitations and track who accepts.
- Cold email sends multi-step email sequences through your mailboxes.
You can run either engine on its own, or both together.
How it works
Both engines send as your own mailboxes. You connect Google Workspace once by uploading a service account and granting it permission across your domain. After that, every mailbox you authorize becomes a sender. Tantra never holds a password or a personal sign-in token.
The two engines differ in what they send:
- A calendar campaign creates a Google Calendar event, adds your prospects as attendees, and lets Google deliver the invitation. The prospect's RSVP is the engagement signal.
- A cold email campaign sends a sequence of emails, one step at a time, with delays between steps. Replies, clicks, bounces, and unsubscribes are the signals.
AI is built into both engines. Tantra can read each prospect's public website and write that person's message from what it finds, using your own connected AI provider.
Screens and controls
After you sign in, the left sidebar is your main navigation. These are the sections you will use most:
| Sidebar item | What it covers |
|---|---|
| Reports | Campaign results and RSVP reporting |
| Campaigns | Create and manage both calendar and email campaigns |
| Inbox | Read and classify replies to your email sequences |
| Leads | Track lead stages and scores |
| Email Analytics | Deliverability and email performance |
| Templates | Reusable message templates |
| Contacts | Import and manage contacts and lists |
| Accounts | Add and verify your sending mailboxes |
| Connectors | Google service account, AI providers, and other integrations |
| Unsubscribe List | People who opted out of your email |
| Billing | Your plan and subscription |
The Campaigns page has two tabs: Calendar Campaigns and Email Campaigns. Each tab lists campaigns of that type.
What happens next
To start using Tantra, you connect Google Workspace, load contacts, and build your first campaign. The Quick start walks through each step in order.
If you are deciding which engine to use, read Calendar campaigns vs cold email. It explains when each one fits.
Best practices
- Connect Google Workspace first. Nothing sends until your senders are verified.
- Start with one engine and a small contact list before scaling up.
- Connect your own AI provider if you want personalized messages written from each prospect's website.
Common mistakes
- Expecting Tantra to log in to individual inboxes. It uses one service account for the whole domain instead.
- Assuming calendar and cold email are the same feature. They are separate engines with separate signals.
FAQ
Does Tantra send email or calendar invitations?
Both. They are two separate engines. Cold email runs email sequences. Calendar campaigns create events and let Google deliver the invitation.
Do I need Google Workspace?
Yes. Tantra sends as your own mailboxes using a Google service account with domain-wide delegation. See How Tantra sends as your mailboxes.
Whose AI writes the messages?
Yours. You connect your own AI provider key and choose the model and prompt. Personalization is optional on every campaign.
Can I run both engines at once?
Yes. Each engine has its own tab on the Campaigns page, and both send from the same connected mailboxes.
Where do results go?
Into the product under Reports, Inbox, Leads, and Email Analytics, and outward through webhooks to any endpoint you configure.
Related articles
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Related articles
- Calendar campaigns vs cold emailCompare Tantra's two outreach engines. Calendar campaigns send Google invitations and track RSVPs. Cold email sends multi-step sequences.
- Quick start, from sign up to first sendSet up Tantra end to end. Sign up, connect Google Workspace, verify senders, load contacts, and launch your first campaign.