AI Invoice Generators (2026): 10 Tools Compared

Invoicing is the job most freelancers and small business owners put off. It isn't hard, but it comes at the end of a long day, and a blank template makes it feel longer than it needs to.

AI invoice generators shorten that step. You describe the job in a sentence, paste your notes or ask a chatbot, and an invoice appears ready to check and send. The tools below are listed alphabetically and in no particular order, and each description comes from the tool's own website, read this week. When invoices go unanswered, my guide to chasing late invoices with AI covers the follow-up.

AI invoice generators side by side

I checked the free plan column on each tool's own website, as of Oct 2026. Yes means the site names the tool, an account or a plan or version of it as free. Trial only means a time-limited trial. Not stated means the pages I read named neither, even where there's a button inviting you to start, so check the tool's own page before you sign up.

Tool	Type	Good for	Free plan
Aviy	Free AI invoice generator	Invoices from one plain-English sentence	Yes
BillForge	Free AI invoice generator	Pasting project notes into an invoice	Yes
Bonsai	Business management with an invoice generator	Agencies connecting their own AI assistant	Yes
Bookipi	Invoicing and AI business tools	Invoices plus other freelance admin	Not stated
Every	AI invoice generator that works with ChatGPT	Building an invoice from inside ChatGPT	Yes
FreshBooks	Invoicing and accounting software	Invoicing tied to full accounting	Not stated
Invoice Simple	Mobile-first invoicing app	Sending invoices from your phone	Not stated
Invoicer.ai	Invoicing software with AI built in	Unlimited invoices, estimates and clients	Trial only
Otto AI	Bookkeeping app with an AI invoice generator	Invoices linked to simple bookkeeping	Yes
Robi AI	Voice AI invoice generator	Saying the job out loud	Yes

Ten AI invoice generators to try

Aviy

Best for: Freelancers who want to type or dictate one sentence with the client, service and due date and get a finished invoice back.

BillForge

Best for: Sole traders who want to paste their project details, let the AI do the formatting and download a clean PDF invoice.

Bonsai

Best for: Agencies and freelancers who want to ask an AI assistant such as Claude, ChatGPT or Gemini to draft an invoice inside their workspace.

Bookipi

Best for: Freelancers who want invoicing, proposals and other small business admin in one app with AI tools built in.

Every

Best for: ChatGPT users who'd like to ask it to build an invoice, then claim it into an account to send it and track payment.

FreshBooks

Best for: Small businesses that want invoicing, expense tracking and payments in one accounting tool, plus a connector for the Claude AI assistant.

Invoice Simple

Best for: Tradespeople who want to create and send customer invoices in a few clicks from their phone, with an AI receptionist available alongside.

Invoicer.ai

Best for: Growing service businesses that want unlimited invoices, estimates and clients, with AI built into the invoicing software.

Otto AI

Best for: Creators and small business owners who want to create invoices online with AI and keep simple bookkeeping in the same place.

Robi AI

Best for: Contractors on site who'd rather describe the job in one sentence, or say it out loud, and get a ready-to-send invoice.

Which generator matches how you work

• You'd rather talk than type: Robi AI.
• You already work inside ChatGPT: Every.
• Pasting rough project notes: BillForge.
• Agencies with their own AI assistant: Bonsai.
• Invoices from one plain sentence: Aviy.

What GOV.UK says an invoice must do

GOV.UK says that if you sell a product or service, you need to give the customer an invoice by law if both you and the customer are registered for VAT. It also points out that an invoice isn't the same as a receipt, which acknowledges a payment, and that an invoice must include certain information, such as how much the customer needs to pay and when.

An AI generator can lay all of that out in seconds, but it can't know your VAT status or the terms you agreed. Check the required details on every invoice before it goes out, especially the first few you create with a new tool.

Five details to check on every AI-made invoice

1. Your business name, address and any registration numbers.
2. The customer's correct name and address.
3. A clear description of the work or goods.
4. The amount due, any tax shown correctly and the due date.
5. A unique invoice number that follows on from the last one.

One-off generators versus invoicing software with AI

One-off generators are perfect for occasional invoices. You type a sentence, download a PDF and you're done, often without signing up. They're less helpful when you need to see who still owes you, send reminders or keep numbering consistent across a year of work.

Invoicing and bookkeeping software with AI built in does the ongoing part: client records, recurring invoices, payment tracking and reports. If you send more than a handful of invoices a month, that's usually the better home for them, with AI speeding up the writing.

Teams with this need often check one more list, which the job management software comparison compares.

Habits that get invoices settled sooner

• Send the invoice the day the work ends.
• Make the due date impossible to miss.
• Offer an easy way to pay online.
• Follow up politely and on a schedule.

Before you commit to a tool, read the gas engineer software comparison.

Signs your invoicing is under control

• Invoices go out on the day the work ends.
• You can see who still owes you at a glance.
• Numbering never skips or repeats.
• Chasing happens without you remembering to.

Do you make invoicing or billing software? Tool makers can ask to be considered for a featured place on this list.

My plain advice on AI invoice generators

If you invoice now and then, a free generator that turns one sentence into a clean PDF is all you need. If invoicing is a weekly job, choose software that keeps your clients, numbering and payment status in one place, and let its AI handle the writing.

Either way, read every invoice before you send it. AI gets the layout right far more often than the details. When you outgrow one-off invoices, my comparison of invoicing software for freelancers and small businesses is the next step.

If that raises the next question, see Best AI Chatbot for Website (2026): 10 Tools Compared.

Frequently asked questions

What is an AI invoice generator?

A tool that creates an invoice from a description, voice note or chat, instead of you filling in a template by hand.

Is there a free AI invoice generator?

Several tools on this list name free use, and others offer a trial, so check the table.

Can I make an invoice by voice?

Yes, at least one tool here lets you say the job out loud and turns it into an invoice.

Are AI-made invoices legally valid?

An invoice is valid when it carries the required details, whoever or whatever wrote it, so check those details yourself.

Can ChatGPT create an invoice?

Some tools on this list connect to ChatGPT or other assistants so you can ask them to draft an invoice.

Should I use a generator or invoicing software?

Use a generator for occasional invoices and invoicing software when you need tracking, reminders and records.