What you'll need
Three accounts. All free or close to.
n8n
Free self-hosted, or n8n Cloud starting $20/mo
Slack workspace + bot token
xoxb token with channels:history scope
OpenAI API key
Pay-as-you-go, ~$0.005 per summary (200 messages)
Gmail or Outlook
For the email delivery
The math
What this is worth, conservatively
Time spent reading Slack backlog daily
20-40 minutes/channel
Time with this workflow
~2 minutes reading the digest
Annualized for 1 channel, 250 weekdays
~75-150 hours recovered
Plus: missed decisions caught (e.g., teammate flagged a blocker you didn't see)
harder to quantify, real
Cost to run this template forever
~$1.20/year
Time savings based on Atlassian state-of-work and Slack's own usage research. Per-channel impact depends on volume and signal-to-noise ratio.