Sauna

Free

An AI assistant built for compounding context. It learns your taste, detects hidden patterns, augments your brain context and works proactively.

FreeFree tier

Inputs: text, fileOutputs: text

Type

Open Source

Visit Website GitHub (40 stars)

About Sauna

Sauna is an AI agent that learns how you and your team work, remembers everything that matters, and acts on your behalf. It connects to over 3,000 tools and apps (e.g., Linear, GitHub, Notion, Gmail, Slack) and runs in the cloud around the clock, proactively handling tasks like drafting messages, tracking issues, filing tickets, and delivering briefings. Available across multiple surfaces — web app, iOS app, iMessage, Slack, email, and Superhuman — Sauna is designed as a 'multiplayer' AI: teammates can share context and memory, enabling collaborative workflows without starting from scratch. It is SOC 2 compliant, and user data is never used for model training or shared with third parties.

Key Features

Multiplayer AI: teammates share context and memory for collaborative workflows

Connects to over 3,000 tools and apps (Linear, GitHub, Notion, Gmail, Slack, etc.) with custom MCP connectors

Runs in the cloud 24/7 — works even when you're offline

Available on web app, iOS app, iMessage, Slack, email, and Superhuman

Persistent memory that remembers everything that matters

Proactive automation: drafts messages, tracks issues, files tickets, delivers briefings

Peer-to-peer access: ask a colleague's Sauna directly without interrupting them

SOC 2 compliant with encrypted, private data handling

Supports scheduled work, automations, and parallel agents (up to 500 concurrent)

Pros & Cons

Pros

Extensive integration library covering thousands of tools
Multiple interaction surfaces (web, mobile, messaging) for seamless access
Persistent memory enables deep contextual understanding
Multiplayer architecture allows team-wide context sharing
Proactive, cloud-based operation reduces manual effort
SOC 2 compliance and strong privacy guarantees
No technical knowledge required for setup or daily use
Supports custom connectors via MCP for unlisted tools

Cons

Pricing is credit-based, which may limit heavy usage on lower tiers
No annual billing option currently available
Free trial limited to 7 days
Some advanced features (e.g., custom models, browser automation) only in higher-tier plans
Relies on cloud connectivity for all functionality

Best For

Team coordination and knowledge sharing across departmentsAutomated email triage, drafting, and follow-up bookingSlack thread summarization and issue triagePersonal assistant for scheduling and task managementCross-tool workflow automation (e.g., connecting Gmail, Linear, and Notion)On-the-go task handling via iMessage or iOS app

FAQ

What is Sauna?

Sauna is an AI agent that learns how you and your team work, remembers everything that matters, and acts on your behalf. The more context it has — your emails, documents, Slack messages, files — the smarter it gets.

What tools does Sauna connect to?

Sauna connects to over 3,000 tools and apps including Linear, GitHub, Notion, Gmail, Google Calendar, Jira, HubSpot, and Stripe. Custom MCP connectors can be added for other tools.

Does Sauna work when I'm offline?

Yes. Sauna runs in the cloud around the clock — drafting messages, tracking what matters, filing tickets, and delivering briefings. You don't have to be online for work to move forward.

Where can I use Sauna?

Wherever you work: the web app, iOS app, iMessage, Slack, email, or Superhuman. One agent with the same memory across all surfaces.

Can my whole team use Sauna together?

Yes. Sauna is multiplayer — teammates share a Sauna's context and memory, so it can coordinate work across the team instead of starting from scratch with each person.

Is my data secure?

Yes. Sauna is SOC 2 compliant, and your data is never used to train models or shared with third parties. Your context is private, encrypted, and only used to do work on your behalf.