Harpoon combines time tracking, invoicing, and revenue forecasting for agencies and freelancers. Plans start at $9/month with a 14-day free trial.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Harpoon is a web-based time-tracking, invoicing, and financial planning application built for agencies, studios, and freelancers. It describes itself as mission control for a business's billing and finances, bringing hourly tracking, client billing, yearly goals, revenue forecasts, and expense budgets into a single account instead of separate tools and spreadsheets.
Harpoon was created by co-founders Andy Johnson, Tom Jaeger, and Ryan Battles. In 2024 they retired and passed it to FlexBillPro LLC, a Texas-based company run by Sam and Brian. The current owners describe a small, independent team and say they intend to keep the product simple and tied to customers' financial success.
Harpoon starts with a yearly financial goal, meaning the revenue needed to cover expenses and salaries and still be profitable. Team members then record time against client projects. The software converts that activity into a forecast showing expected revenue, when it will be collected, and how it affects monthly and yearly goal progress.
Projects can be budgeted before work begins, for hourly or fixed-fee billing, so profitability is estimated up front. A monthly expense budget covers spending, and invoices can be sent and followed up automatically. The company calls its approach The Harpoon Method, a set of four rules that structure these financial practices.
The planning tools include financial goal tracking, revenue forecasting, and predictive project budgeting. Time tracking shows the value, cost, and potential profit of each recorded hour. Invoicing covers scheduled sending, recurring invoices, automatic billing of credit cards or ACH accounts, and automatic follow-ups on overdue invoices, which reduces repetitive billing work.
Beyond that, Harpoon offers a customizable dashboard with dozens of metrics and reports that can be shared with an accountant. Team management supports partners, employees, and contractors with roles, permissions, internal cost rates, and weekly capacity. International options include custom currency and date formats and multi-language invoicing. Security covers SSL encryption, daily backups, and Stripe payment processing.
Harpoon is web-based time-tracking, invoicing, and financial planning software for agencies, studios, and freelancers. It combines yearly goal tracking, revenue forecasting, project and expense budgeting, and automated billing.
Plans start at $9/month for the Starter plan (1 user, 3 clients). Freelancer is $19/month, Studio is $39/month, and Agency is $99/month for 20+ users, with $5 per user per month beyond 20. Yearly billing saves 21%.
Yes. Harpoon offers a 14-day free trial with unlimited access to all features and no credit card required. After the trial you are prompted to upgrade, and trial data is saved for a limited period if you do not.
Harpoon is built for agencies, studios, and freelancers that track client time and bill by the hour or at a fixed fee. It suits owners who want to plan revenue against a yearly goal.
Harpoon has a full Zapier integration and a flexible API for custom workflows. Stripe handles credit card information and online client payments.
Yes. The Starter plan covers one user with up to 3 clients, Freelancer covers 2 users, and Studio covers 8 users. Larger teams can move to the Agency plan.
No. Harpoon is pay-as-you-go and billed monthly or yearly. You can cancel your subscription whenever you like.
Harpoon uses SSL encryption for account data and makes daily backups. Credit card information and online client payments are processed through Stripe.