Ignition at ignitionapp.com is proposal and billing software for accounting firms, bookkeepers, and other professional services. It is not a car product. You send a branded proposal, with up to three package options, plus an engagement letter. The client signs and enters payment details. Ignition then creates invoices in QuickBooks Online or Xero on the schedule in the proposal, and Ignition Payments can mark those invoices paid.

TaxDome and Canopy also send proposals and take payment, inside a system that runs the firm's jobs and portal. Ignition is the agreement and the recurring bill, not that operating system. Double (formerly Keeper) closes the client file. Ignition does not categorize transactions or replace the ledger. The books stay in QuickBooks Online or Xero, which is where the invoice and the payment land.

Firms stick with it when they are tired of rebuilding a Word letter and then chasing the first payment. The card or bank details are on file before the work starts, so a monthly fee can run from the signed proposal. A scope change can be billed from the same client instead of a new contract from scratch.

Build a branded proposal from templates and a service library, with up to three options and add-ons. Engagement terms go out with it. The client signs online. Solo and Core include one signature per proposal. The US pricing table shows up to 2 on Pro and up to 10 on Pro+.

Send the proposal and the engagement letter together

The client enters a card or bank account on the proposal. Ignition can bill one-off, recurring, hourly, weekly, quarterly, or annual schedules. During the 14-day trial you can collect up to $10,000 with zero payment fees. After that, US standard cards are 2.5% + $0.30, premium cards are 3.6% + $0.30, and ACH is 1% + $0.30 with a $5 cap, plus 0.3% on the amount above $3,000.

Collect payment details before work starts

When the client accepts, Ignition creates the invoice in QuickBooks Online from the proposal lines and can match a new client or update the name. It can also import recurring QuickBooks invoices and turn them into draft proposals. The Xero integration page describes the same pattern: invoices from the proposal, and payments marked paid.

Create the invoice in QuickBooks Online or Xero

US annual prices on the pricing page: Solo is $39 for 20 active clients and 1 user (under $150k revenue), then +$7 per extra client. Core is $99 for 50 clients and 3 users, then +$5. Pro is $229 for 350 clients and 15 users, then +$3. Pro+ is $399 for 600 clients and 20 users, then +$2.

Stay inside the client and user caps

The pricing table lists single renewals on Core and bulk renewals on Pro and Pro+. Online forms are included on Pro and Pro+ and an add-on below that. The deals pipeline is included on Pro+ and an add-on on lower plans. The product page also lists billing for out-of-scope work. Add-on dollar amounts were mixed across currencies, so they are not repeated here.

Renew, reprice, and bill work outside scope

Proposals, engagement letters, and recurring invoices for firms. US Solo is $39/mo billed annually. Not a vehicle product.

Ignition Review: Proposals and Recurring Billing for Firms

Ignition

Solo

Core

Pro+

Enterprise

Clear Books is the ledger for a UK sole trader, landlord, or small company. You record income and expenses, send invoices, and file to HMRC from this file. Paid plans add bank feeds and bill and receipt capture. MTD for Income Tax quarterly updates are on the free sole trader and property plans. MTD VAT submissions are on Sole Trader Plus and on the Medium and Large organisation plans. The site has said it is UK software since 2008.

Xero and QuickBooks Online are the ledgers many accountants already know. Kick is a US replacement ledger. Dext, Hubdoc, and Veryfi capture documents and publish them into Xero or QuickBooks Online. Nanonets and DocuClipper extract invoices or statements for those same files. Clear Books is the books, not a capture add-on. Invoices, bank matching, VAT, CIS, and dividends live here, with hard plan gates. A US shop will not find 1099s in this file.

People who stay want UK support and one file that can start as a free MTD Income Tax record for a simple sole trader or a single property, then add invoicing and bank feeds. You can invite an accountant on the free plans. Limited companies, partnerships, and charities move to the organisation plans when they need journals, user permissions, dividends, and the fuller report set.

Sole Trader Free, Property Free, and Foreign Property Free cover HMRC-recognised MTD Income Tax quarterly updates and year-end filing, with no transaction cap, and you can invite an accountant. MTD VAT, the flat-rate scheme, and domestic reverse charge start on Sole Trader Plus. On organisation plans, MTD VAT submissions start on Medium. Small does not include them.

File MTD from the plan that includes it

Sole Trader and the organisation plans create and email invoices, including recurring invoices and reminders. Stripe and GoCardless are on the feature list for card and direct debit. Instant Bank Payments is an optional open-banking add-on. The pricing page does not show that add-on's price.

Invoice and collect in the same file

Paid sole trader and property plans include automated bank feeds and bill and receipt scanning. Organisation plans include a bank feed with automated matching on Small and up. The feature list also names an Auto Code pass over bank lines. The bank-feed provider is not named.

Match a bank feed and capture bills

Medium adds purchase orders, CIS reporting and submissions, and budgets, plus MTD VAT. Large adds project accounting, multi-currency with XE.com rates unless you override them, employee expense claims, mileage, and fixed assets. Stock tracking is marked on Small, Medium, and Large.

Step up for VAT, CIS, projects, and currency

The feature list says you can pay bills and payroll from Clear Books through Revolut Business. Payroll is a separate add-on with RTI submissions to HMRC and a 30-day trial. Its price is not on the pricing page. Auto Bills is included on paid sole trader and property plans and listed as an add-on on Small, Medium, and Large.

Pay bills or run payroll as add-ons

Organisation plans include journals, an audit log, user permissions, and period locks. Reports include profit and loss, balance sheet, cash flow, and trial balance, with CSV or PDF export. The accountant works in this file. There is no QuickBooks Online or Xero sync on the pages opened.

Lock a period and hand the file to an accountant

Clear Books is a UK ledger. Free MTD Income Tax plans exist. Paid plans start at £5/mo plus VAT. VAT filing is not on every plan.

Clear Books Review: UK Ledger, MTD Plans, and VAT Gates

Clear Books

Sole Trader Free

Sole Trader

Sole Trader Plus

Property Free

Property

Foreign Property Free

Foreign Property

Small

Medium

Large

Invoice Ninja is a free invoicing software designed for freelancers and small businesses. It provides tools for invoicing, payments, expenses, time tracking, and project management, allowing users to maintain a clear overview of their financial status. The platform enables users to create professional invoices and quotes quickly, manage client payments, and track business expenses efficiently.

Create beautiful, professional invoices and quotes in seconds.

Invoicing & Quotes

Clients pay directly from their invoice with one click.

Online Payments

Track every billable minute and manage projects with Kanban boards.

Time Tracking & Projects

Track all your business expenses and manage vendors.

Expenses & Vendors

Your clients get their own branded portal to view invoices and make payments.

Client Portal

Free Invoicing Software for Small Business

Free Plan

InvoiceSnap

InvoiceForge

Conta is an invoicing software designed to help freelancers and small business owners create, send, and manage invoices quickly and efficiently. With a user-friendly interface, Conta allows users to send professional invoices via email, PDF, or WhatsApp, and includes features like automated payment reminders and the ability to track invoices on the go. Conta is free to try for 30 days, making it accessible for startups and small businesses looking to streamline their invoicing process.

Create and send professional invoices in seconds.

Professional Invoicing

Let Conta send reminders to your clients for you.

Automated Payment Reminders

Manage your invoices on the go with the free mobile app.

Mobile App

Send unlimited invoices, quotes, and orders with the Premium plan.

Unlimited Invoices

Recurring Invoices

Free professional invoicing for startups

Standard

Premium

Invoiced by Flywire is an AI-native invoice-to-cash platform designed for B2B finance teams. It automates accounts receivable processes including invoicing, collections, cash application, reporting, and forecasting, while integrating global payments. This allows mid- to large-sized businesses to receive payments faster with reduced manual work. With features like smart chasing and cash application, Invoiced enhances the efficiency of financial operations.

Automates invoicing, collections, and cash application to streamline the accounts receivable process.

Accounts Receivable Automation

Customizable reminders and follow-ups based on customer payment behavior.

Smart Chasing

Offers over 1,200 local payment options across 140+ currencies, integrated directly into the platform.

Embedded Global Payments

Provides insights into accounts receivable performance and cash flow forecasting.

Analytics and Reporting

Seamlessly connects with major ERP systems to ensure accurate data synchronization.

Integration with ERP Systems

Invoiced

Invoicely is a free, simple, and secure invoicing platform designed for small businesses. It allows users to create and send invoices and estimates, track time and expenses, and accept online payments. With over 250,000 small businesses using the platform, invoicely aims to help users manage their finances efficiently and effectively.

Create professional and elegant looking estimates and invoices in any language or currency in seconds.

Effortless Invoicing

Receive instant online invoice payments from anywhere, allowing clients to pay directly on your invoice.

Accept Online Payments

Turn hours, miles, and expenses into invoices and bills at the click of a button.

Track Time, Expenses & Mileage

Easily set up multiple businesses with individual team members and clients.

Manage Multiple Businesses

Fully customize statements, logos, and control panel pages to fit your brand.

Custom Branding

Invoicely

Free

Basic

Professional

Flowlu is an all-in-one project management and CRM platform designed for small and medium businesses. It offers tools for managing client work, tracking project progress, and handling financial records in one place. Users can create and send invoices, manage budgets, and visualize financial data with ease.

Log payments and expenditures for projects instantly to keep your books accurate.

Expense Tracking

Create and send invoices within seconds, automate billing, and get paid online.

Invoicing

Manage all financial records and plan your budget in one place with visual data insights.

Financial Management

Collaborate on tasks and projects in real-time with chat and comments.

Collaboration Tools

Measure and analyze time spent on each task to improve productivity.

Time Tracking

Flowlu

Essential

Advanced

Ultimate

Gekko is designed specifically for small entrepreneurs, providing an easy-to-use accounting system with all necessary features. Users can manage expenses, scan receipts, create invoices, and track time and trips seamlessly. The Gekko Costs app allows users to digitize receipts effortlessly, eliminating the need for physical storage. Gekko offers a free basic plan with unlimited use, making it accessible for all entrepreneurs.

Scan and manage receipts using the Gekko Costs app, keeping expenses organized.

Receipt Management

Create and send professional invoices and quotations directly from the platform.

Track billable and non-billable hours with a clear overview and integration with calendars.

Connect your bank account for real-time updates on incoming and outgoing payments.

Real-Time Bank Integration

Automatically track business trips using GPS for accurate mileage logging.

Trip Management

Gekko

Gekko Basic

Gekko Premium

Quipu is an all-in-one invoicing and treasury solution designed for freelancers, companies, and bookkeepers. It simplifies the management of invoicing, cash flow, and taxes, allowing users to focus on their core business activities. With features like automated billing processes and real-time cash flow visualization, Quipu helps users make informed financial decisions.

Easily create and send invoices while tracking their status from anywhere.

Automated Invoicing

Synchronize income sources and visualize cash flow with real-time data.

Cash Flow Management

Utilize OCR technology to register invoices quickly and reliably.

Document Digitization

Automatically associate bank movements with corresponding invoices.

Bank Reconciliation

Benefit from auto-completion of tax forms and specialized advisory services.

Tax Management

Quipu

Starter

Versapay is a cloud-based invoice-to-cash solution that automates and simplifies the accounts receivable process. It helps finance teams unlock cash flow by streamlining invoicing, collections management, and cash application. With features like a digital invoicing portal and automated reconciliation, Versapay enables businesses to get paid faster and improve cash flow efficiency.

Automate billing and streamline collections with digital invoicing.

Predict delinquencies and prioritize high-risk accounts with automated collections.

Collections Management

Automatically match payments to invoices, reducing guesswork.

Cash Application

Accept ACH, credit cards, and wire payments seamlessly.

Digital Payments

Track AR metrics and visualize collections trends for better decision-making.

Cash Flow Forecasting

Versapay

Harvest helps professional teams track time, bill clients, optimize team time, and measure performance with confidence. It offers features like time tracking, invoicing, expense management, and team management, all in one platform. Over 70,000 companies use Harvest to turn tracked hours into paid invoices.

Log hours your way, on any device with one-click timers, weekly and daily timesheets.

Create polished invoices from tracked time and expenses, with online payment options.

Log expenses per project, attach receipts, and manage reimbursements.

Expense Management

Analyze time spent and project profitability with visual breakdowns.

Reporting

Approve timesheets, see team capacity, and assign people to projects.

Team Management

Harvest

Teams

GroFlex is a business resource planning (BRP) software designed to optimize various business processes, including sales, accounting, inventory management, and customer relationship management. It offers real-time analytics and reporting to enhance decision-making and operational efficiency. GroFlex is cloud-based, allowing for easy scalability and integration of new applications as businesses grow.

Offers real-time insights and analytics for better decision-making and accurate forecasting.

Real-time Analytics

Automate recurring invoices and payment processing to save time.

Invoicing Automation

Real-time monitoring and advanced analytics for efficient stock control.

Inventory Management

Manage customer interactions and analyze customer data to enhance service.

Customer Relationship Management

Automatically records all transactions for accurate financial tracking.

Seamless Accounting

GroFlex

FreeAgent is designed for small businesses, freelancers, and contractors, providing a comprehensive solution for managing finances with confidence. It offers features like cashflow forecasting, invoicing, payroll, and tax compliance, ensuring users can streamline their administrative tasks and focus on growth. With a user-friendly interface and mobile app, FreeAgent helps users stay on top of their financial position and make informed decisions.

Automated cashflow forecasting to help users project their financial future.

Cashflow Forecasting

Easy-to-use invoicing tools that allow for quick payments and automated reminders.

Fully integrated payroll system that submits Real Time Information directly to HMRC.

Payroll

Generate MTD-compatible VAT returns and file them directly to HMRC.

Tax Compliance

Manage finances on the go with the FreeAgent mobile application.

FreeAgent

Monthly Plan

Introductory Monthly Plan

Annual Plan

Introductory Annual Plan

Zoho Books is comprehensive accounting software designed for growing businesses, managing everything from invoicing to inventory and expenses. It offers a cloud-based solution that allows users to handle their end-to-end accounting needs efficiently. The platform is also VERI*FACTU compliant in Spain, ensuring local compliance for users in that region.

Raise professional invoices and quotes, automate invoices and reminders, and send online payment links.

Receivables

Track vendor bills and expenses, add recurring expenses, and include client expenses on invoices.

Payables

Track inventory, update stock information automatically, and set reorder points.

Inventory

Send project quotes, accommodate partial payments, and log time and expenses.

Projects

Get actionable insights on cash flow, taxes, profit and loss, and sales.

Reports

Zoho Books

Elite

Wave is a small business software that provides a unified system for accounting, invoicing, payments, and more. It helps users gain financial clarity and stay tax-ready year-round. Designed for small business owners and solopreneurs, Wave simplifies bookkeeping and tax preparation, making it easy to track income, manage cash flow, and create professional invoices.

Invoicing & Billing