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Slack Export Review Time and Cost Calculator
Estimate how long it takes a person to read the part of a Slack export a request makes relevant, and what that time costs. You enter every number: no review rate is assumed for you.
Messages to read: 2,500
Review hours: 14 (including second reviews)
Working days for one reviewer: 2.3
Review cost: $833.
Your numbers stay in your browser. Defaults are round placeholders, not benchmarks. Second reviews are counted as extra reads of that share of messages. The calculator ignores export prep, context threads, attachments, privilege calls by counsel and any outside vendor fees.
Review cost by export size and share flagged (illustrative grid)
| Export size | 1% flagged | 5% flagged | 10% flagged | 25% flagged |
|---|---|---|---|---|
| 10,000 messages | $33 | $167 | $333 | $833 |
| 50,000 messages | $167 | $833 | $1,667 | $4,167 |
| 250,000 messages | $833 | $4,167 | $8,333 | $20,833 |
| 1,000,000 messages | $3,333 | $16,667 | $33,333 | $83,333 |
Download this grid as CSV. Method: messages x share x 20 seconds / 3600 x $60, one reviewer, no second pass. The 20 seconds and $60 are assumptions spanning a range; they are not measured review rates and not from any vendor or survey.
What the calculator leaves out
- Reading surrounding messages for context, and files or links in them.
- Legal judgement on privilege or privacy, which belongs to counsel.
- Time to request, download and unpack the export. See the guide to searching a Slack export.
Not legal advice. See how the concept would handle review in the FAQ.
Threadlens is an early concept in validation.