We built this because we needed it.
Bordermath was born after one of our founders spent 4 hours on a Saturday realizing his Schengen days didn't add up for his planned return to Portugal — and he was already in Bangkok. The spreadsheet said one thing. Reality said another.
“We believe long-term travel should be about the trip — not the paperwork. Bordermath handles the visa math so you can focus on where you're going, not whether you're allowed to be there.”
What makes Bordermath different
The first visa planner that sequences routes
Every existing tool answers 'how many days have I been in Schengen?' Bordermath answers 'what's the optimal ORDER to visit my destinations to stay legal?' That's the real problem — and nobody else solves it.
Proactive alerts, not reactive panic
You hear about conflicts before you book, not after you land. Bordermath monitors your active routes and fires alerts 30, 14, and 7 days before every deadline. While you sleep.
Built by travelers who've hit the wall
We know what actually matters in the data. Not every policy nuance — the ones that bite you on the return trip. The ones that Reddit finds out about 2 weeks after the embassy updates them.
Built by ChimeStream
ChimeStream is a small team of builders and travelers. We ship fast, iterate on user feedback, and dogfood every feature ourselves. Bordermath is the tool we wish existed when we were staring at a spreadsheet at 11pm, trying to figure out if our Europe → Asia → Europe route was actually legal.
Start planning — it's free
No credit card. No onboarding call. Just plan your route.
Start planning free