What is an Audit Log?
A full record of every change made to a project — who did what, when, and what changed
An audit log is a chronological record of every action taken in a project — who moved a task to a new column, who changed a deadline, who left a comment, who deleted something. Each entry shows the user, the timestamp, the entity affected, and what changed: the value before and the value after.
Project teams use audit logs to answer questions that come up constantly: "Who changed the deadline on this task?" "When did this task move to In Progress?" "What did this section say before someone edited it?" Without an audit log, the answer is "I don't know" or "check the email thread." With one, it is a 10-second lookup.
Audit logs also serve as a liability record. When a client disputes what was agreed or when something goes wrong on a project, the audit log provides an objective record of decisions and changes.
What a Project Audit Log Tracks
A complete project audit log records every meaningful action — not just task status changes, but the full chain of events across the project lifecycle.
- Task status changes — when a task moved columns and who moved it
- Field edits — deadline changes, assignee updates, title edits (with before and after values)
- Comments — who posted, when, and the comment content
- File uploads and deletions
- Team membership changes — who was added or removed from the project
- Project-level changes — name, budget, color, column renames
- Task creation and deletion
Before and After: The Value of Change Diff
The most useful audit logs show not just that something changed, but what it was before and what it became. A log that says "Deadline changed by Alex on August 14" is less useful than one that says "Deadline changed from August 20 to September 3 by Alex at 14:32."
The before/after diff turns an audit log from an accountability tool into an actual productivity tool. Teams use it to understand why a project slipped (three consecutive deadline extensions visible in order), to resolve disputes without accusation (the log shows exactly what happened), and to reconstruct decisions when the person who made them is no longer available.
Activity Heatmap
An activity heatmap visualises when work happened across a 14-week calendar grid. Darker squares mean more changes on that day. Lighter squares mean less. Empty squares mean no logged activity.
The heatmap shows patterns that a list of entries cannot: which weeks were productive, when a project went quiet (a risk signal), and how activity distributes across the team over time. A project that has been dark for two weeks but is due in three is visible immediately.
Audit Log in Melororium
Each project in Melororium has a History tab. It shows the full audit log for that project with before/after diffs for every recorded change. Filter by action type (created, moved, completed, updated, deleted, commented) or search by contributor name. A 14-week activity heatmap appears at the top.
History is kept for 90 days. The Backup & History add-on module (Agency and Studio plans) includes the full audit log with all filtering capabilities.
Melororium
Backup & History in Melororium
Project management, time tracking, CRM, and invoicing — one flat monthly fee. Starter $29/mo · Agency $59/mo · Studio $119/mo.
Frequently Asked Questions
Which plan includes the project audit log?
The Backup & History module is available on Agency ($59/mo) and Studio ($119/mo) plans.
How long is history kept?
90 days of change history are stored per project.
Can I filter the audit log by a specific team member?
Yes. The History tab shows a contributor breakdown — click any team member to filter the log to their actions only.
Is the audit log visible to Workers (non-admin team members)?
No. The History tab is only accessible to Admins and Owners. Workers are limited to their own tasks and assigned projects.
Put it into practice
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Project management, time tracking, CRM, and invoicing — one workspace, one flat fee. From $29/mo.