biz59
Tools for developers, data people and small teams.
Biz59 LLC is a small company in New York. We build and run eleven products, most of them with one sign-in, and we write about what we see in software, AI and startups.
A database client, plus free data tools in the browser.
iPaid, i Owe: track what you owe and what is owed to you.
Security tools for small sites and teams, with one sign-in.
Short links, QR codes and page-view tracking.
An email router for apps, developers and bots.
Privacy policies, consent records and download/delete requests for apps and sites.
Website, policies, support pages, sign-in and cloud sync for your mobile app.
Offline-first cloud sync for your app's data, with sign-in for your users built in.
Our build agent: describe your app in a chat and watch it get built. Coming soon.
A whiteboard that also draws the diagram from your outline.
Markdown notes and documents that look good on screen and on paper.
More articles
info@ and support@ without a paid seat: shared mailboxes in Microsoft 365 and Google Workspace for a ten-person business
How a ten-person company sets up info@, support@ and invoices@ without paying $216 to $648 a year for empty seats. Microsoft 365 shared mailboxes (free up to 50 GB, sign-in blocked) vs Google Groups Collaborative Inbox and delegation, send-as permissions, reply collisions, licensing traps, and when a dedicated helpdesk is worth it.
UK VAT for a non-UK software company: the first-pound rule, quarterly returns and what an agent costs
A non-UK SaaS selling to UK consumers has no GBP 90,000 allowance. Here is the 30-day registration rule, B2B reverse charge, MTD filing calendar, published 2026 agent fees, and the cost of own filing against a merchant of record at GBP 3,000 and GBP 30,000 a month.
SPF, DKIM and DMARC for a ten-person business in 2026: why invoices land in spam and the three DNS records that fix it
Why invoices sent through QuickBooks, Stripe or a CRM silently land in customer spam folders, the 10-lookup SPF limit that breaks email delivery, worked DNS records for your domain, and the 4-step path to p=reject.