Atlas drafts your projects, Pulse watches what’s slipping, Herald writes your client updates, and Tally builds your invoices. You stay in control — they handle the work that used to take all weekend.
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Or poke around the interactive demo — no signup required.
Quiet AI assistants
They draft. You decide. Nothing goes out without your blessing — the work, the invoice, the client update.
One sentence in. A full project plan out — phases, tasks, hour estimates, billing milestones — for you to review.
Sweeps your projects every morning. Flags overdue work, stalled tasks, and risk before they become surprises.
Pulls the week's progress, blockers, and what's next into a client-ready note you review before it sends.
The moment you mark a milestone complete, Tally assembles the invoice from logged time, the agreed fee, and any expenses.
Why Mainspring
Other PM tools track work. Mainspring also turns that work into invoices, client updates, and risk flags — automatically, with your review at every step.
Mark a billing milestone complete and Tally assembles the invoice — line items pulled from logged time, the agreed fee, and any expenses. Every line traces back to its source. You review, edit if needed, and send.
Describe the engagement in one sentence. Atlas drafts the phases, tasks, hour estimates, and billing milestones — for you to review, adjust, and ship. No form fields. No starting from a blank canvas.
Generate a branded read-only link for any project. Clients see status, progress, outstanding invoices, and recent activity — without ever signing up for Mainspring.
See it in action
See exactly how Mainspring fits together — from kicking off a new project to invoicing the client and getting AI-flagged risks before they become problems.
Prefer to click around yourself? Try the interactive demo →
What else is included
Drag tasks across statuses or zoom out to a project timeline. Both views update from the same data.
Reusable checklists with day-offset due dates. Spawn an entire onboarding in one click.
Your colors, your logo, your domain — clients never see "Mainspring" unless you want them to.
Revenue, time, expenses, project health — all exportable to CSV.
Admin / member / viewer roles with row-level security on every table.
Track vendor bills, scan receipts, reconcile against project budgets in one place.
Free for 14 days, no credit card. Set up takes about as long as it took you to read this page.