Alongside client work, we build and run products of our own: e-signatures, time tracking and billing, a connection between Claude and Clio for law firms, and the PDF engine underneath. They use the same stack and the same standards as the software we build for clients.
e-signature with a full api
Send documents for signature, track who has signed, remind who hasn't and verify any signed file later. Templates, brand kits and webhooks come with it, and there is an API for everything. Your team can also prepare and send envelopes from Claude or ChatGPT, and the assistant checks with them before anything goes out.
time, billing and contractor pay for studios and agencies
Track hours with timers or a weekly grid, approve time, run contractor pay and send invoices, all in one app. Expenses, supplier bills, a client portal and profitability reports are included.
claude, connected to clio
Lets a law firm's team ask Claude about their matters, calendar, tasks and bills in Clio, and get answers from the real records. Lawyers can log time, add notes and create tasks just by asking. Each person signs in with their own Clio account, so Claude only sees what they can.
the pdf engine inside our products
Creates, fills, merges and signs PDFs. Supports PAdES signatures with long-term validation, RFC 3161 time-stamps, PDF/A archiving and the EU e-invoice formats, checked against independent validators. It runs in PHP and as a memory-safe Rust engine.
Switching to eSignStack has cut our costs by more than half while allowing us to send nearly four times the envelopes. Their support team is incredibly responsive, and the overall experience has been excellent.
We build SaaS products, customer portals and internal tools for clients, and look after them for years. Tell us what you want to build.