BillSensor
Stop getting blindsided by SaaS charges.
BillSensor is a Chrome extension that monitors SaaS billing emails in Gmail and alerts you before renewal charges hit. It works passively as you browse — no Gmail OAuth, no bank connection, no setup. It detects subscriptions from 62+ SaaS tools, scores each one on how hard they make it to cancel, and gives you a direct cancel link before the charge arrives.
Features
- Passive Gmail detection — no OAuth, no account connection required
- 7-day and 3-day renewal alerts via Chrome notification
- Dark pattern scores for 62+ SaaS tools
- Direct cancel links for every detected subscription
- Email renewal alerts (Pro)
- Cancellation records PDF (Pro)
- Cloud sync and multi-device support (Pro)
- Unlimited passive detection on free plan
- No email data ever leaves the browser
- Works instantly on install — no setup needed
Use Cases
- Freelancer paying for Adobe, Notion, and 5 other tools wants to know before any of them renew
- Solopreneur who got charged after cancelling a free trial wants a system that catches it next time
- Small business owner wants a shared view of every active SaaS subscription across the team
- Developer who signed up for multiple API trials wants alerts before they convert to paid
- Digital agency managing subscriptions across client accounts needs renewal visibility without bank access
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Comments
I got charged for a subscription I was sure I'd cancelled. The refund was denied. The cancellation flow was designed well enough to make me doubt my own memory. I looked for something that would have caught it. Everything I found either needed bank access, Gmail OAuth, or was built for enterprise teams with 50 tools and a dedicated IT person. Nothing existed for a freelancer or solopreneur who just wanted a heads-up before the charge hit. So I built BillSensor. It runs in the background while you use Gmail, detects billing emails from 62+ SaaS tools, and alerts you 7 days before the next charge. No Gmail login, no bank connection, no setup. If you've ever been surprised by a renewal you forgot about, or got charged after cancelling something, that's exactly who this is for. Happy to answer any questions.
Scoring each SaaS tool on how hard it is to cancel is a really original angle, and the direct cancel links make it actionable. The fact that it works without Gmail OAuth or bank access is a strong privacy selling point for freelancers. One idea: let users see the total monthly cost of upcoming renewals in one view, so it is easy to decide what to drop.
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Comments
I got charged for a subscription I was sure I'd cancelled. The refund was denied. The cancellation flow was designed well enough to make me doubt my own memory. I looked for something that would have caught it. Everything I found either needed bank access, Gmail OAuth, or was built for enterprise teams with 50 tools and a dedicated IT person. Nothing existed for a freelancer or solopreneur who just wanted a heads-up before the charge hit. So I built BillSensor. It runs in the background while you use Gmail, detects billing emails from 62+ SaaS tools, and alerts you 7 days before the next charge. No Gmail login, no bank connection, no setup. If you've ever been surprised by a renewal you forgot about, or got charged after cancelling something, that's exactly who this is for. Happy to answer any questions.
Scoring each SaaS tool on how hard it is to cancel is a really original angle, and the direct cancel links make it actionable. The fact that it works without Gmail OAuth or bank access is a strong privacy selling point for freelancers. One idea: let users see the total monthly cost of upcoming renewals in one view, so it is easy to decide what to drop.
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