Invoice Ninja
Open-source invoicing with quotes, invoices, a client portal and payments, available hosted or self-hosted.
- Free plan or free tier
- Developer API
Free invoicing app from Zoho with quotes, invoices, a client portal and online payments.
Not enough info yet on built-in e-signature, integrates with HubSpot. Check the tool's own site.
Listing written by QuoteMeta, checked 2026-11-03. Report a correction or request removal. Back to quotes and invoices for freelancers.