Pricing
Free for 3 boards. $50 a month for the whole workspace.
Every feature is included on both plans. Install first so checkout can be securely bound to the correct Slack workspace.
Free
$0forever
Every feature, capped at three boards. No time limit.
- 3 boards, kept forever
- Unlimited workspace members
- Every feature included
- Full version history & decision ledger
- Markdown → Canvas rendering
- MCP server for Slack AI
- Email support
Most popular
Team
$50per workspace / month
For teams making diagrams a daily habit.
- Unlimited boards & versions
- Unlimited workspace members
- Every feature included
- Full version history & decision ledger
- Markdown → Canvas rendering
- MCP server for Slack AI
- Email support
Common questions
- Does team size change the price?
- No. Team is $50 per workspace per month, regardless of member count. Annual billing is $600, the same effective monthly rate.
- Is there a trial?
- There's no trial because there's no expiry. Free is permanent and has every feature — you only pay once you need a fourth board.
- Does Arialine store our diagrams?
- Files and canvases live in your Slack workspace. Arialine keeps operational state (version pointers, decision links) to keep the ledger current.
- Can Finance pay without joining Slack?
- Yes. A workspace admin can copy a workspace-bound payment link. Anyone with that link can complete checkout; payment does not grant Slack access or billing-management permission.