Miro charges per member and edits boards in Miro; asking Slackbot to change them needs a Slack plan with Slackbot. Arialine works on every Slack plan, for one flat workspace price.
Start with Miro
Keep a Miro board when spatial arrangement and freeform facilitation are central.
A review with Miro
Evaluate Arialine
Use Arialine when Mermaid source, addressed revisions and the source message behind each applied change need a shared board in Slack. Review generated output before accepting it.
A review with Arialine
| Capability | Miro | Arialine |
|---|---|---|
| Works on Slack Free and Pro without upgrading | Slack app yes; Slackbot editing no | |
| Create a diagram from a Slack message | Via Slackbot (Business+/Enterprise+) | |
| Edit the diagram from the Slack thread | Via Slackbot (Business+/Enterprise+) | |
| Usage limit for Slack-side editing | 15 Slackbot messages/member/week on Business+ | Free: 10 AI generations/day, 8 versions per board; Team: none |
| Pricing model | Per member | Flat per workspace |
| Mermaid source you can paste and export | Generated inside Miro | |
| Version history in the Slack thread, with Undo and Rewind | — | |
| Each change linked to the Slack message behind it | — | |
| Interactive HTML file in the channel | — | |
| Freeform whiteboard, sticky notes, workshop templates | — | |
| Notifications and board access actions in Slack | — |
Arialine generates Mermaid and publishes a board with HTML and PNG artifacts in Slack.
An addressed thread edit produces a new version. In proposal mode, review and apply it first. Ordinary replies remain discussion.
Open the published HTML file → Decisions → select Retry queue
Inspect the decision history. The diagram's decision view connects recorded changes to their source messages.
For a separate technical diagram, write the accepted components and relationships as Mermaid or a concise prompt, type /arialine and create a board. Arialine works the same on Slack Free, Pro, Business+ and Enterprise: commands, mentions and shortcuts are ordinary Slack app features, not Slackbot features.
Setup, pricing and data tradeoffs
Miro is priced per member (Starter $8, Business $20 per member per month billed yearly), and each person who edits needs a seat. Asking Slackbot to create or change Miro content uses Slackbot's MCP client: Slackbot is included on Slack Business+ (15 Slackbot messages per member per week) and Enterprise+ (no weekly limit); Free and Pro get Slackbot only during a trial or preview. Arialine is one flat price per workspace — $79 a month for the whole team — and works on every Slack plan, including Free.
Arialine's Free plan includes all features with up to 3 boards of 8 versions each and 10 AI generations per workspace each day; pasted Mermaid renders without a limit. Team removes every limit and adds high-resolution PNGs. Compare current competitor plans and account requirements directly rather than assuming equal packaging.
Miro's MCP server can generate native diagrams, and a team already paying for Slack Business+ and Miro seats may be well served by it. Prices and limits are vendor list prices at the review date and can change; check the sources below.
Yes, if your Slack plan includes Slackbot. It is included on Business+ (15 messages per member per week) and Enterprise+; on Free and Pro it is only available during a trial or preview. Each person also connects their own Miro account and needs a Miro seat to edit. Arialine works on every Slack plan and needs no per-person accounts.
For diagramming in Slack, usually. Miro is billed per member (Starter $8, Business $20 per member per month, yearly). Arialine is $79 a month for the whole workspace, however many people use it, and has a Free plan with every feature.
No. Its Slack app creates boards with /miro, shows notifications and handles access requests. Editing a board happens in Miro, or through Slackbot on Slack plans that include it.
No direct Miro importer was verified. Start from Mermaid or a description of the accepted design, then review the generated board.
No. Keep the visual board for freeform workshops. Use Arialine for technical diagrams that change through Slack discussion and need a version trail.
Official sources reviewed September 24, 2026. Capabilities, account requirements and availability can change. Arialine mechanics were verified against its application implementation.
Free includes every feature. Install in one channel, make a small board and try one addressed revision.
Add Arialine to my Slack