send21 vs Stint: Which Is Better in 2026?

Direct. Non-custodial. Yours. Prepares payment drafts and pay links; you sign in your own wallet. For humans and AI agents.

send21 helps you prepare payment drafts and pay links without taking custody of funds. You review and sign in your own wallet. Built for humans and AI agents.

Stint is a timer and invoicing desk for one freelancer.

The loop is the whole product: pick a client and start the timer, stop it when the work stops, and one click turns that client's unbilled hours into an invoice. Send the client a shareable link or a PDF, then mark it paid when the money arrives. You collect payment yourself, outside Stint.

It exists because the usual setup is two tools for one job — a timer that cannot invoice, and an invoicer that cannot track time — with the same hours re-typed between them every week. Stint is built for a single person: no team seats, no workspace admin, no accounting suite.

What it does today: a per-client timer (with optional projects and per-project rates), manual entries for forgotten hours, one-click invoices from unbilled time, a public client invoice link, PDF download, and mark-paid / void (voiding returns the hours to unbilled).

Try it free at the live link and tell us where the timer-to-invoice flow breaks for how you actually bill. Specific feedback from solo freelancers is what this launch is for.

What problem it solves

Solo freelancers usually juggle two tools for one job — a timer that cannot invoice and an invoicer that cannot track time — re-typing the same hours between them every week. Stint does both in one single-person tool.

Alternatives & competitors

Alternatives: Toggl Track, Harvest, Wave — difference: timer and invoice in one single-person tool.