Guardrails for your SaaS costs

Automatically track recurring SaaS and hosting spend and get warned before renewals, price increases, and forgotten tools eat into your runway.

No finance setup. No spreadsheets. No surprises.

14 days free · No credit card required

SaaS spend creeps. Founders notice too late.

You don't lose money in one big mistake — you lose it slowly.

Without Costrail
  • Renewals auto-charge without review
  • Seat counts grow quietly with the team
  • Trials convert to paid plans unnoticed
  • Price increases buried in invoices
  • Nobody knows who owns which tool
With Costrail
  • Alerts before every renewal
  • Spend updates automatically each month
  • Trial endings flagged in advance
  • Price changes detected and surfaced
  • Every subscription has a clear owner

You review and decide. Nothing changes without your approval.

Everything you need to stay on top of SaaS spend

Monthly Overview
$2,847
across 12 subscriptions
Figma$45
AWS$892
Slack$340
Notion$96
Linear$80
Spend Trend
+12%vs last month
JanDec
Upcoming Renewals
Figma
Jan 15
$45/mo
in 7 days
Notion
Jan 22
$96/mo
in 14 days
Slack
Feb 1
$340/mo
in 24 days
Linear
Feb 15
$80/mo
in 38 days
Recent Alerts
Slack price increased
$12.50 → $15.00 per seat
2 days ago
New subscription detected
Loom - $12.50/mo
5 days ago
AWS usage spike
+$127 from last month
1 week ago
Subscription Owners
Figma
SC
Sarah Chen
Design Lead
AWS
MR
Mike Rodriguez
CTO
Slack
You
You
Admin
Notion
AK
Alex Kim
Product

How it works

Set up in minutes. Stay informed automatically.

invoices@yourcompany.costrail.app
Figma Invoice - $45.00
Notion Invoice - $96.00
Slack Invoice - $150.00
Extracted details
Figma$45.00
MonthlyRenews Jan 15
Notion$96.00
MonthlyRenews Jan 22
Slack$150.00
MonthlyRenews Feb 1
Recent alerts
Monthly summary: $291.00 (+$25 from last month)
Figma renews in 7 days
Slack increased by $25/month
New subscription detected: Linear

Built for founders, not finance teams

What you see

  • Total monthly SaaS spend
  • Cost trends over time
  • Upcoming renewals and trial endings
  • Fixed vs usage-based costs
  • Owner assigned per subscription

What this is not

  • Not accounting software
  • Not FinOps or cloud optimization
  • Not a bank or card integration
  • Not expense management
  • No complex setup or onboarding

Costrail is a founder hygiene tool. It shows you what you're paying — and warns you before things slip.

Pricing

Costs less than the subscription you forgot to cancel.

Solo Founder

$5/mo
  • Up to 20 subscriptions
  • Invoice forwarding
  • Renewal alerts
  • Monthly summary
Most popular

Small Team

$9/mo
  • Up to 50 subscriptions
  • Everything in Solo
  • Assign owners
  • Team access (3 seats)
  • Price change alerts

Unlimited

$15/mo
  • Unlimited subscriptions
  • Everything in Team
  • Unlimited team members
  • CSV export
  • Priority support

All plans include 14-day free trial. No credit card required. Cancel anytime.

Stop the next surprise renewal

Forward your first invoice. See your spend in 5 minutes.

14 days free · No credit card required