Can I open-source Fathom HQ?
KINDA · partial or early alternativesKinda. Invoice Ninja and ERPNext cover the core of Fathom HQ, but they're early or partial — expect gaps like accounting integrations and consolidation.
They pay because board/advisor reporting needs accuracy, comparability, and presentable output.
xaccounting integrations
xconsolidation
xtemplates
xforecasting
xreport builder
xadvisor workflows
xreliability
These projects already replace it, free.
EERPNextFull ERP — accounting, inventory, HR, manufacturing, CRM — that rivals systems costing six figures.open source↗IInvoice NinjaInvoicing, quotes, expenses, and time tracking for freelancers who'd rather not pay monthly.open source↗KKimaiProfessional time tracking with invoicing, teams, and exports.open source↗What each one is, in full: ERPNext · Invoice Ninja · Kimai
no votes, no pay-to-list · just what's real
Fathom HQ pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| fathom pro starter | $41.54/workspace | — | 1 company; unlimited users and consolidated groups; each extra company is about $41.54/month |
| fathom pro silver | $221.77/workspace | — | 10 companies included; each extra company is about $21.83/month |
| fathom pro gold | $316.82/workspace | — | 25 companies included; each extra company is about $11.97/month |
| fathom pro platinum | $566.75/workspace | — | 50 companies included; each extra company is about $9.15/month |
| fathom pro enterprise | custom | — | Custom company allowance and commercial terms |
| portfolio, 100 companies | $43.65/workspace | — | Portfolio reporting for up to 100 companies |
| portfolio, 300 companies | $260.49/workspace | — | Portfolio reporting for up to 300 companies |
| portfolio, unlimited | $352.02/workspace | — | Unlimited companies for portfolio reporting |
free tierno free tier; 14-day trial only
billingmonthly only; no annual contract
hidden costsPrices exclude Australian GST. Pro accounts auto-upgrade when company count crosses a band but do not automatically downgrade when companies are removed; additional-company charges apply above the included count.
verified 2026-08-10 · source ↗
Can I open-source Fathom HQ?
Kinda. ERPNext covers the core of Fathom HQ, but there are real gaps: accounting integrations, consolidation. Read the honest list above before committing.
How much does Fathom HQ cost?
Fathom HQ costs about $41.54/month (Fathom Pro Starter, checked 2026-08-10), which is $498.48 per year.
What do I lose by replacing Fathom HQ?
Honestly: accounting integrations; consolidation; templates; forecasting; report builder; advisor workflows; reliability. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Fathom HQ?
Yes: ERPNext (Full ERP — accounting, inventory, HR, manufacturing, CRM — that rivals systems costing six figures.) Invoice Ninja (Invoicing, quotes, expenses, and time tracking for freelancers who'd rather not pay monthly.) Kimai (Professional time tracking with invoicing, teams, and exports.)