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Kairos and FreshBooks, side by side
FreshBooks is bookkeeping first: invoices, expenses, accounting reports and a seat for your accountant, with a timer alongside. Kairos is the timer first, with the invoice on the end of it.
Kairos and FreshBooks compared
| Feature | Kairos | FreshBooks |
|---|---|---|
| Price | $0.99 a month for Basic, $1.99 for Pro: founding prices, locked for life for the first 500 workspaces. Pro covers up to five members; nothing per seat. | $23 a month for Lite, flat rather than per user, with up to five billable clients. Plus is $43 for fifty clients. Each extra team member is $11 a month. |
| Invoicing | Built in, on every plan. Unbilled hours and expenses become an invoice with your tax line, due date and logo. The client gets a PDF and a page to read and pay it, through your own Stripe account or your bank details. Monthly retainers draft themselves, and invoices sync to QuickBooks Online and Xero. | Built in, with online payment, recurring invoices and reminders, and the accounting behind it: expenses, reports, and access for your accountant. |
| Free tier | No free plan. Every workspace starts with 14 days of Pro, no card, and a sample workspace can be tried without signing up. | No free plan. A 30-day trial, no card. |
| Monitoring | None. No screenshots, activity scores or location. Just the hours you track. | None. |
| iPhone app | Yes, on Pro. Works offline; entries sync when you are back online. | Yes. |
| Assistant and API | Yes. Claude connects to Kairos as a connector, signed in with OAuth, and can start, stop and log time and draft invoices. A token-scoped API does the same for scripts. | A REST API for developers. |
FreshBooks prices checked October 16, 2026, per user per month on annual billing, from public pricing pages and comparison guides. They are rounded and they change; FreshBooks’s own site has the current figures.
The difference, in plain terms
FreshBooks began as an invoicing tool and grew into an accounting one. It handles estimates, recurring invoices, expenses, bank connections and the reports a tax preparer asks for, and its time tracker feeds the invoice the way everything else does. If you want one place for the whole money side of a small business, it is a sound choice, and the price is for the accounting.
Kairos is only the hours and the invoice. It does not keep your books, reconcile a bank account or file anything. It tracks time against a client and a rate, and on invoice day it turns the unbilled entries and expenses into an invoice with your tax line, due date and logo. The client gets a PDF and a page to pay from, through your own Stripe account or your bank details. A monthly retainer drafts its own invoice. If your books are in QuickBooks Online or Xero, Kairos syncs its invoices there, so the bookkeeping stays where it already is.
That narrowness is what the price buys. Basic is $0.99 a month for one person on the web; Pro is $1.99 with the iPhone app and up to five members included, where FreshBooks is $23 a month plus $11 for each person you add. Both are founding prices, locked for life for the first 500 workspaces.
If you want your accounting, expenses and invoicing in one system with automatic payment reminders, or your accountant already works in FreshBooks, FreshBooks is the better fit.
Fourteen days on us. Then a dollar.
Every workspace starts on a full Pro trial, no card. If it isn’t for you, nothing was charged.