One brain for the whole business, so it stops waiting on you.
You are early to a business brain inside the AI you already pay for. Harness reads your mail and your Xero overnight, remembers how your business runs, and has the replies, quote follow-ups and invoice chases drafted in your words by morning. You tap.
7 days free on the full product. Cancel in one tap.
The best bits, in the order they happen.
It reads the books and the inbox while you sleep.
Unpaid invoices, quotes that went quiet, mail waiting on a reply. Ranked by how each customer actually pays, so the list is short and true.
A draft waits on your phone. In your words.
Four sentences: invoice number, amount, the date it was due, one way to pay. Approve, edit, skip or snooze. Skip has an undo.
It checks the things a chaser gets wrong.
Already paid? Chased last week? Always pays on day 40? Then it stays quiet, and tells you why.
Nothing leaves without it.
Tap to approve is on as standard. Let a routine reminder go on its own after you have approved it five times unchanged. Final demands always wait for you.
Let this one go on its own from now? You can switch it back any time.
Final demands and escalations are never offered
See the whole of it at once.
Each screen draws itself as a graph, so you spot what matters before you read a word.
Your 12 things, by how long each takes. Top left is quick and matters: start there.
It moves from person to person on its own. Hover or tap a dot to hold one.
It checks before it writes.
Already paid?
The ledger first. The worst thing a chaser can do is chase someone who has paid.
Chased last week?
Then not again. Twice in seven days is harassment, not persistence.
Always pays on day 40?
Then day 35 is not late. It learns each customer's habit and waits.
Quiet quote?
Followed up as interest, never as debt. A quote is not an invoice.
Open dispute?
Left alone. That is a conversation, not a reminder.
Friday afternoon?
It waits for Monday. A chase that sits unread all weekend burns the attempt.
Works with Xero Gmail Outlook HubSpot Telegram ChatGPT Claude
Coming soon (built, awaiting approval) QuickBooks Online GoCardless Microsoft Copilot
One price, for the whole company.
£19 a month
Not per seat. 7 days free. Card taken today, charged on day 8 unless you cancel.
The first 50 companies are the Founding Fifty and pay £19. After that it is £49. Anyone who joins at £19 keeps it.
Start 7 days freeNo AI subscription needed for the web app. Or connect your own Claude or ChatGPT.
The questions I get asked.
What is Harness by Heoka?
A business brain for small UK firms. It connects to your mailbox (Gmail or Outlook), your Xero and your HubSpot, reads them overnight, and remembers how your business runs: who pays when, who went quiet, what you promised, how you sound. By morning the replies, quote follow-ups and invoice chases are drafted in your words. You approve each one in the ChatGPT or Claude you already pay for, or in the Harness desk.
Is it only for chasing invoices?
No. Chasing is the first job most owners hand it, because it pays for itself fast. The same brain answers the mail waiting on you, follows up quiet quotes, keeps a board of everyone you deal with, holds a memory you can read and correct, and runs routines you switch on and off.
Does it send on its own?
Tap to approve is on as standard. You can switch it off for routine reminders. Final demands and escalations always wait for your tap.
Can it read my email?
Yes, the Gmail or Outlook mailbox you connect. That is how it knows who already replied. Data is held in the EU.
Why not the Claude plugin?
It is a good bundle of skills, and its invoice skill drafts reminders matched to how each customer has paid. Harness adds one memory of the business that works overnight, quiet quotes as well as invoices, the email you should not act on, and team roles, and it runs on ChatGPT too.