Your AI Assistant.
Now Does the Admin.

Connect Claude, ChatGPT, or Gemini to Clientary. Log time, draft invoices, update projects, and see who owes you, all in plain English. Your assistant does the admin. You approve what goes out.

Your AI assistant · connected to Clientary
Log 3 hours on the Greenleaf rebrand for today, then draft an invoice for everything unbilled this month.
log_time list_time_entries create_invoice
Done. I logged 3 hours and drafted the invoice from 17 unbilled hours.
INV-0053 · Greenleaf Botanicals
Draft Ready for your review
$2,550.00
Looks right. Send it.
send_invoice
Sent to Dana at Greenleaf, with a link to pay online.

Clientary works with the AI assistant you already use.
Run your client work from a conversation.

Already living in Claude or ChatGPT? Connect it to Clientary and your assistant can track time, build estimates, draft invoices, manage projects and tasks, and answer questions about your business. It works through the open MCP standard, signs in as you, and never sends anything to a client without your go-ahead. Try us for Free.

How it works

Add the server

Add the Clientary MCP server to Claude, ChatGPT, Claude Code, or Gemini CLI. It takes about a minute.

Sign in once

Approve the connection with your Clientary login. Your assistant works as you, with your permissions.

Just ask

Ask for what you need in plain English. Review the drafts it makes and tell it when to send.

Things you can ask

If you can say it, your assistant can do it in Clientary. A few favorites from teams like yours:

Time

Log 2.5 hours on the Meridian website for yesterday, non-billable.

Invoicing

Draft invoices for every client with unbilled hours this month.

Getting paid

Which invoices are overdue, and who should I nudge first?

Estimates

Turn these meeting notes into an estimate for Bright Pixel.

Projects

Add tasks for the launch checklist and assign them to Sam.

Reporting

How much did we invoice last quarter compared to the one before?

Retainers

Set up a $3,500 monthly retainer for Greenleaf starting next month.

Clients

Add these five new clients from my email signature list.

Create invoices in ChatGPT, Claude, or Gemini

Plenty of business apps now let an AI assistant read your data. Clientary's MCP server lets it do the work, with you approving what reaches clients.

Read and write, end to end

Your assistant can create and update clients, estimates, invoices, retainers, recurring schedules, projects, tasks, time, contracts, and proposals, not only look them up.

One server, every assistant

The same Clientary MCP server works in Claude, ChatGPT, Claude Code, Gemini CLI, and other MCP-ready tools, so each person can use the assistant they prefer.

Safe to hand over

Documents start as drafts, sending needs your confirmation, nothing gets signed, and every action runs with the permissions of the person who connected it.

Works with your assistant

Claude, ChatGPT, Claude Code, Gemini CLI, and any assistant that supports MCP servers. Add the Clientary server and sign in once.

Covers the whole business

Clients, leads, estimates, invoices, retainers, recurring billing, projects, tasks, time, contracts, proposals, comments, and reports, all reachable from a conversation.

Drafts first, always

Documents your assistant creates start as drafts. Sending is a separate step it confirms with you, and it never signs anything on your behalf.

Your permissions, nothing more

You approve the connection yourself, and the assistant works as you. Teammates' assistants see only what their role allows.

Admin controls built in

Turn AI assistants off for the whole account in one switch, and review or revoke connected apps at any time.

Switching is easier

Moving from another tool? Paste in your client list and let your assistant set up the clients, projects, and retainers for you.

Clientary works with the solutions you already love

Trusted by service businesses

Freelancers, agencies, and firms run their client work on Clientary. Read their stories.

10,000+Businesses served
14 daysFaster when clients pay online
Since 2008Built for service businesses
Try it free for 14 daysNo credit card, no setup fees. Setup takes minutes.
No per-invoice feesSimple monthly plans. Payments go straight to your own processor.
Leave anytimeMonth to month. Export your data as CSV or through the API whenever you like.
Secure by defaultPasskeys, two-factor, and role-based access. How we protect you.

Highly Rated, Low-Key Loved.

Rated excellent: See why users rave about us

Users love Clientary on G2

Most of the time I'm paid within minutes of sending an invoice because it's so easy for someone to check that task off their list. Obviously I like this software, but most importantly to me - my clients like it.

Robin H.

Robin H.

Freelance Writer

With recurring invoices, custom templates, time tracking, expense tracking, automated invoice reminders, and so much more, the toolkit they offer has kept us organized and hugely simplified our bookkeeping. I can't count how many times our clients have asked about our 'amazing' invoicing system.

Chris M.

Chris M.

Digital Marketer / Founder

When searching for a client management and invoicing system we researched all the tools for SMBs on the market and tested them out, and Clientary was our hands down choice for ease of use and the ability to easily customize client-facing documentation. And of course the very reasonable subscription fee. As they say themselves, "all the functionality we need, and none that we don't."

Brian N.

Brian N.

Consultant / Executive Coach

Frequently asked questions

Which AI assistants work with Clientary?

Claude, ChatGPT, Claude Code, and Gemini CLI, plus any other assistant that supports MCP servers. Setup takes a minute and the help article walks through each one.

How do I create an invoice in ChatGPT?

Connect Clientary to ChatGPT once, then ask for the invoice in plain English, like "Invoice Greenleaf for this month's unbilled hours." ChatGPT drafts it in Clientary, shows you the total, and sends it when you say so. The same works in Claude and Gemini.

What is MCP?

The Model Context Protocol is an open standard that lets AI assistants use outside tools. Clientary runs an MCP server, so a connected assistant can read and update your account through the same API our apps use.

Can my assistant send an invoice without asking me?

No. Creating an invoice, estimate, contract, or proposal makes a draft. Sending is a separate step, and assistants confirm with you before anything goes to a client. Signing documents is never done by an assistant.

What can the assistant see?

Exactly what you can. You sign in and approve the connection yourself, and the assistant then works as you, with your role's permissions. A teammate without access to billing gets an assistant without access to billing.

Can an administrator turn this off?

Yes. Admins can turn AI assistants off for the whole account in Settings, and anyone can review and revoke the apps connected to their login.

Does it cost extra?

No. Connecting an assistant is part of every Clientary plan. You use your own Claude, ChatGPT, or Gemini account.

I use another invoicing tool today. Can my assistant help me switch?

Yes. Export your client list from your current tool and ask your assistant to create the clients, projects, and retainers in Clientary. You can also import clients and contacts from a CSV file.

Ready to hand the admin to your assistant?

See Pricing and Signup

Clientary is a comprehensive suite of tools for professional service businesses. Your assistant can help with online invoicing, time tracking, projects, retainers, and everything we automate.

Developers can find the full tool list in our AI assistants documentation.