Monthly active rows
We gauge the size of your sync based on the number of âmonthly active rowsâ (MAR) in a given billing period. An active row is the number of unique rows synced between your source and your database, such as a create, update, or delete. An active row will only be counted once during a billing period, regardless of how many times it is synced or updated. Additionally, your first sync (i.e. backfill) and any re-sync from your source does not add to your monthly active row count. A quick example will help you understand how monthly active rows work.A practical example
Letâs say you have a simple Airtable base with one table and three rows â A, B, & C:
As noted above, your first sync of this table isnât counted in your MAR. So to start off, your MAR is 0.
You then add a status to rows A and B. Sequin detects this update and syncs it to your database:
Your MAR is now 2.
You realize you added the wrong status to column A and correct the status:
Again, Sequin detects this update and syncs it to your database, but because weâve already synced row A, this change doesnât affect your MAR. So your MAR is still 2.
Finally, you want to add a new noteâs column to your table. You add the new field, which adds a new column for all your rows:
This new field is added to your sync as a subsequent backfill. You never pay when first adding tables or columns to your sync, this change does not count towards your monthly active rows. Your MAR is still 2.
As you can see, instead of needing to guess how frequently your data is being synced due to updates, you can reason about MAR by looking at the size of your source and the general amount of rows being added, deleted, or updated (at least once) in a month.
Estimating your usage
As soon as you create a new sync in Sequin, weâll begin tallying your monthly active records for your source. You can access these usage metrics in the Sequin console by clicking on the user icon in the top right corner and selecting Usage. Every hour, weâll calculate your MAR by sync and in total. Youâll also see your total MAR trend graphed by day.As a general guide, you can approximate the monthly active rows for a source to be about 10% of the total rows in the source. For instance, if you have 500,000 rows in your Salesforce database, your MAR will likely be around 50,000.

