Privacy Policy

The short version

Arialine is a Slack app for turning ideas into living, versioned diagrams. It acts only when you ask it to — when you @mention it, run an /arialine command, use one of its message shortcuts, or work in a thread on a board you created. We store what's needed to build your boards and keep their history, and nothing more.

Arialine is not a listening bot. It does not monitor, read, or store the everyday conversation in your channels. We do not sell your data, and we never use your Slack content to train AI models.

What Arialine accesses in Slack

When you install Arialine, Slack sends us the installing workspace or organization ID and name, the installing user's Slack ID, the app installation details, and the bot access token required to operate the app. The token is stored on our server and is never shown on the website or sent to PostHog.

Arialine only looks at a message when you bring it in — by @mentioning it, running an /arialine command, using one of its message shortcuts, or acting in a thread on a board you created. In those moments it receives just the specific message, its thread context, and any files or reactions it needs to do what you asked. It does not sit in your channels reading messages it wasn't asked to handle.

There is one opt-in exception, and it is off by default: ambient listening. If a workspace admin turns it on for a specific channel, Arialine briefly reviews recent messages in that one channel to notice when a diagram-worthy decision has settled — and even then it only keeps what becomes part of a board.

For a diagram, we store the board name, workspace and channel IDs, Mermaid source, version history, change summaries, Slack user IDs, timestamps, and links back to the source Slack messages — the record needed to show the board's history and explain why each element exists.

Website and service analytics

The website uses PostHog to collect page views, the page path, anonymous website identifiers, language changes, Add to Slack clicks, blocked-install events, successful OAuth callbacks marked installed=1, browser errors, and general interaction events captured by the analytics library.

PostHog may also receive standard technical information such as browser and operating system, screen size, URL, and the IP address used to make the request. The website does not ask for a Slack password, does not collect Slack message content, and has no account or payment form. The browser may keep an anonymous analytics ID in local storage and cookies.

The Slack service sends PostHog operational metrics such as workspace ID, feature used, trigger, response time, success or failure, AI provider and model, fallback position, token counts when a provider reports them, and error type. We do not intentionally put Slack message text or Mermaid source into these analytics events.

How we use the data

We use Slack data to respond to your request, create and update diagrams, keep version history and decision ledgers, post files and canvases back into Slack, prevent duplicate event processing, troubleshoot failures, and measure which features and AI providers are working.

Rendered diagrams are uploaded as Slack files in your workspace. Decision ledgers are Slack Canvases in your workspace. Arialine also stores the diagram source and history in its PostgreSQL database so the board can be updated later and shown in the Home tab.

AI providers

For AI-assisted features, the relevant instruction, conversation context, and current diagram source may be sent to one of these providers: Google Gemini 3.5 Flash, Fireworks Kimi K2.6, or NVIDIA NIM DeepSeek V4 Flash. The provider is selected by the fallback order configured for the service.

Arialine does not use Slack data to train models. The providers process requests to return an answer under their own service terms. We do not sell Slack data or share it with advertisers.

What we do not collect

We do not collect Slack passwords, payment card numbers, Slack user tokens, or content from workspaces and channels that Arialine cannot access. We do not sell data, use it for advertising, or use it to train AI models.

Retention, access, transfer, and deletion

Board source, versions, decisions, settings, and related metadata are kept while the app is installed so the service continues to work. Uninstalling Arialine stops new processing, but it does not automatically delete existing records yet. Operational records and analytics are kept according to the configured PostHog and service-retention settings.

You can ask what data we have about you or your workspace, request a copy in a usable format, or request deletion by emailing hi@arialine.app. If GDPR or another privacy law applies to you, use the same address for an access, portability, correction, objection, or deletion request. We may ask for enough information to verify the workspace and request before acting.

Contact

Support, privacy, GDPR, and developer contact: hi@arialine.app. We aim to reply within 2 business days.