Our Product
The operating system for small services businesses.
Project management, invoicing, time tracking, accounts payable, client portals, and an AI advisor — in one place. Built for the kind of small teams who don't have time to wire seven SaaS tools together just to send a clean invoice.
What's inside
Drag tasks across a Kanban board or zoom out to a Gantt timeline. Multi-task templates spawn entire onboarding flows in one click.
Drag-to-reschedule timeline, capacity warnings, and a workload view that surfaces who's overloaded before it's a problem.
Log hours per task. Roll-ups to projects, clients, and invoices.
Branded invoices, recurring billing, payments via Stripe, ACH, or check. Export-ready for your accountant.
Track vendor bills, schedule payments, generate NACHA files or QuickBooks exports. Receipt scanning via OpenAI Vision.
White-label, read-only project view at a private URL. Your colors, your logo — clients never see Mainspring unless you want them to.
Live revenue, time, expenses, and project health dashboards. Exportable to CSV.
An OpenAI-powered strategy assistant that reads your real numbers and answers questions about cash flow, capacity, and growth.
Who it's for
Marketing studios, consultancies, agencies, professional services firms — anyone who runs projects, bills clients, and pays vendors, but isn't big enough to justify NetSuite. Mainspring sits at the seam between a project management tool and a small-business accounting platform, so you don't have to.
Contact
Software, consulting, or both — we read every note.
hello@hostengp.com