Two account lists in.
You and your partner each upload an Excel or CSV list — customers, prospects, or both. Neither side sees the other's raw file.
Each company uploads an Excel or CSV list privately. OnlyCommon reveals only the accounts you share and helps connect the right account owners on each side. Your invited partner doesn't need an account to get started.

From two lists to one
Instead of comparing accounts on a call, both sides upload — and only the overlap comes back.
You and your partner each upload an Excel or CSV list — customers, prospects, or both. Neither side sees the other's raw file.
OnlyCommon normalizes company names, domains, DUNS, and VAT/registration IDs, then compares the two lists in a private workspace.
You get a clean report of the shared accounts identified from the uploaded lists, with match type and confidence — and nothing that isn't on both lists.

Two ways to match
Includes the account owner on each side. When the overlap is revealed, OnlyCommon can automatically introduce the two sellers so they can plan the deal together.
Compares the companies only. Use it when you don't have owner data on file, or when you're mapping at a higher level before drilling into individual deals.
The long tail
A dozen accounts that were already top of mind for the people on the call. Almost always this quarter's focus deals, on one team's side.
The shared accounts identified from the uploaded lists across both books — including expansion targets, dormant customers, and overlap neither team would have thought to mention.
From overlap to action
On a Team Match, OnlyCommon introduces the two account owners for each shared account. Sellers can see who owns the relationship on each side and coordinate the next action.

A line is one account row processed by OnlyCommon. If each company uploads about 100 accounts, the total is 200 lines — which fits comfortably in the free plan. That's enough to run a focused test with a partner before you decide to scale up.
Privacy first
OnlyCommon reveals only the accounts that appear on both lists. Everything else stays private to the side that uploaded it.
Non-matching rows are never shown to the other company. Your full list stays yours.
We keep the cleaned match result, not your original spreadsheet.
Your partner can upload and join in one step — no account required to get started.
200 free lines every month. Unlimited users. No per-seat fees. Upgrade when you're ready to map more accounts or run more partners.
Upload a list, invite by link, and see the accounts you share — privately, with 200 free lines every month.