BillSensor spots SaaS billing emails and alerts you 7 days before a renewal lands. Gmail needs no account connection at all. Outlook and Microsoft 365 connect once, read-only, for a 12-month history scan.
Product screens shown with sample data.
Renewal notices land in the same inbox as everything else, and the ones that matter look exactly like the ones that don't. By the time a charge shows up on a statement, the decision has already been made for you.
Gmail and Outlook work in genuinely different ways under the hood, so the steps are not the same. Pick yours.
Nothing to sign into, nothing to approve. There is no Gmail connection step because BillSensor never asks Google for access to your inbox.
Detection happens in your browser, on the email already rendered on screen. The tool name, amount and next charge date are read from it and saved.
A Chrome notification fires before the charge, whether or not you have an account. Register free and renewal emails cover your 5 lowest-cost subscriptions too.
Same first step. No account needed yet, and nothing is connected until you choose to connect it.
Microsoft's own consent screen asks for a single scope, Mail.Read. BillSensor cannot send, delete or change anything in your mailbox with it.
Every billing email from the past year is checked at once, including subscriptions you had forgotten. Alerts arrive by email. Pro and Business re-scan daily.
A new billing email from Adobe arrived for $59.99, dated after the cancellation you recorded on 12 September.
Illustrative alert. Amounts and dates are sample data.
Mark a subscription as cancelled and BillSensor keeps checking. If a billing email turns up from that tool after your cancellation date, you hear about it immediately rather than finding it on a statement weeks later.
BillSensor cannot cancel a subscription for you or reverse a charge. It tells you what happened and points you at the vendor's own cancellation page.
Each of these exists because it maps to a billing pattern that actually costs people money.
A Chrome notification 7 days before a charge, on every plan. Pro and Business add a second warning at 3 days, by Chrome notification and by email.
Keeps checking a subscription after you mark it cancelled, and alerts you if a charge arrives anyway.
Pro and BusinessCompares each detected bill against the last one. Anything more than 20% above the previous amount is flagged as a spike.
Pro and BusinessResearched tools carry a 1 to 10 rating for how hard each makes cancelling, based on published policies and documented complaints.
A timestamped record of when you cancelled, saved as a page you can keep or print. Useful evidence if a charge turns up afterwards.
Pro and BusinessMonthly and yearly totals across everything detected, in the currency you were actually billed in. Eight currencies supported.
Pro and BusinessDetection covers 90 SaaS tools across design, marketing, developer, hosting, finance and AI software. 68 of them already carry a cancellation difficulty score with the reasoning published alongside it, and the rest are being researched.
Adobe
Google
Microsoft
Notion
Salesforce
Mailchimp
Figma
Slack
Zoom
Canva
Zapier
DocuSignCharges an early termination fee on annual plans cancelled part way through, and routes some regions to a phone call rather than a self-serve flow.
Users report charges continuing for several months after a cancellation attempt, with no confirmation email to point to and a manual refund process.
Adds billable seats when team members are invited, and annual renewals arrive with little advance notice.
A high score means cancelling takes more effort, not that a company is acting unlawfully. See the full scorecard and the evidence behind each rating.
Both paid plans include a 7-day free trial and a 14-day money-back guarantee, no conditions attached.
Cancel any time. 14-day money-back guarantee.
Cancel any time. 14-day money-back guarantee.
Install it, open your next billing email, and see what BillSensor picks up. Free, and nothing to connect.
Works in Chrome, Edge, Brave, Opera and other Chromium browsers.
Most people go looking for a subscription tracker straight after a charge they did not expect. The statement arrives, there is a line on it for a tool that was supposed to have been cancelled months ago, and the obvious thought is that something should have caught it sooner. That is the actual job. Not a tidier list of what you pay for, but a warning that reaches you while you can still act on it.
BillSensor is a subscription tracker: a subscription tracking app delivered as a Chrome extension rather than something you install on a phone. It reads the billing emails already arriving in your inbox, records what renews and when, and warns you before the charge lands. Among subscription management tools it is a deliberately narrow one, and the sections below set out exactly where that line falls.
The honest starting point is that nearly every tool in this category can show you a list. The differences sit in how that list gets built, how much access building it costs you, and whether anything happens in the gap between a renewal date being recorded and the money leaving your account.
A tracker is only as accurate as the way it finds subscriptions in the first place. Manual entry works until you forget a row, which for most people happens somewhere around the fifth tool. Bank connections see charges but not context, so a line carrying a payment processor's name tells you money moved without telling you what it bought.
Reading billing emails sits between those two approaches. The receipt already names the tool, the amount and usually the next charge date, which is why BillSensor reads receipts rather than asking for access to your bank. On Gmail this happens inside your own browser as you open an email, with no Google sign-in and no permission screen, because no OAuth request is made at any point. Outlook and Microsoft 365 work differently: one read-only connection scans twelve months of history in a single pass. The technical explanation of why Gmail needs no connection sets out the mechanism in full.
Recording that Adobe renews on the 24th is not the same as telling you on the 17th. Plenty of subscription management software stores renewal dates and shows them when you log in, which puts the information in front of you at precisely the moment you were not looking for it.
Alerts are the part that changes an outcome. BillSensor sends a notification seven days before a charge on every plan, and paid plans add a second one three days out, by Chrome notification and by email. Neither of those cancels anything on your behalf, and no tracker can: cancellation happens on the vendor's own site, under whatever process that vendor has settled on. What the alert buys you is the window in which starting that process is still worth the effort. Auto-renewal is not the problem by itself. Auto-renewal you had forgotten about is.
Cancelling and being charged for the last time are not the same event. Companies have continued billing people after a confirmed cancellation, and the usual way anyone finds out is a statement several weeks later, by which point the argument is about a refund rather than a charge.
Most subscription management tools treat a cancellation as the end of the record. BillSensor treats it as the point where checking matters most. Mark a subscription as cancelled and it keeps checking. If a billing email arrives from that tool dated after your cancellation, you hear about it immediately rather than at month end. Price changes get the same treatment, and any charge more than twenty percent above the previous one is flagged separately as a spike. Scored tools carry a cancellation difficulty score from one to ten, with the reasoning published rather than asserted, so you can see before signing up which companies make leaving hard. The full scorecard is public and needs no account to read.
BillSensor suits freelancers, agencies and teams of roughly one to ten people: the size where SaaS spend is real money and nobody has a finance department watching it. It is not enterprise procurement software, and it does not try to track recurring payments across your whole financial life. If you are still weighing the options, we have compared the best subscription tracker choices for freelancers honestly, including where other tools do more than this one. If you would rather just see it working, the setup guide walks through both the Gmail and Outlook paths.