Most SaaS founders think about monitoring late. It's understandable — when you're building toward an initial launch, alerting infrastructure feels like something you'll set up after you have customers. The problem is that without monitoring, you often find out about outages the same way your customers do: a frustrated email, a tweet, or a support ticket that arrived an hour after the failure started.
This guide is for founders in the early stages of a SaaS product — pre-revenue to a few hundred customers. It explains what to monitor, why each endpoint matters at a founder level, and how to scale your monitoring posture as you grow.
Why Uptime Matters More Than Founders Think
Downtime is not just a technical inconvenience. For an early-stage SaaS product, it has consequences that compound.
Churn from downtime: Early customers are not yet loyal. They're evaluating whether your product is worth continuing to pay for. An unannounced outage during their working hours is a strong signal that reliability is not a priority. For some customers, one outage is enough to cancel.
Trust erosion: In B2B SaaS, your product is part of a customer's workflow. When it goes down, it disrupts their day. Customers who experience multiple unreported outages may remain subscribers but become less committed advocates. Word of mouth dries up.
Investor optics: If you're fundraising, investors may do informal diligence by checking whether your product is up. A service that goes down during a trial period, or that has no status page, signals operational immaturity. A visible status page with a history of incidents resolved quickly signals the opposite.
The founder sleep-through problem: Without monitoring, you don't know your service is down unless you happen to be checking at the time. An outage that starts at 2 AM and runs until 9 AM — seven hours of downtime — may go completely unreported until a customer emails. With monitoring, the alert fires within 60 seconds of the failure and you can respond on your own schedule.
What to Monitor at Launch
Your Web Application
The first monitor to add is your main app URL: https://app.yoursaas.com. This confirms that the web interface is reachable and returning a valid response. Configure it to check every minute and alert when it fails.
For the status check, look beyond the HTTP 200. If your app is up but the database is broken and it's returning a broken error page with a 200 status code (this happens), you want the monitor to catch it. Add a response body keyword check for something that only appears when the app renders correctly.
Your API
If your product has an API — either a public API your customers call, or an internal API your frontend uses — monitor its health endpoint. Something like https://api.yoursaas.com/health should return a 200 with a simple {"status":"ok"} response.
API failures are often invisible in web monitoring. Your React frontend might gracefully degrade to an empty state or loading spinner when the backend API fails, meaning users see a broken UI without a clear error. A direct API monitor fires the alert.
If you don't have a dedicated health endpoint, build one. It should:
- Return 200 when the API and database are reachable
- Return 503 when they are not
- Complete in under 200ms
This endpoint becomes the source of truth for your monitoring stack.
Your Authentication Service
The login flow is the gateway to your product. If auth is broken, all your customers are locked out — regardless of whether any other part of the system is functioning. Monitor the auth endpoint directly: https://app.yoursaas.com/login or the OAuth redirect URL, or your identity provider's well-known endpoint if you use a third-party auth service.
Auth failures are a distinct failure mode from general application failures. A broken database migration may only affect certain features while leaving auth intact. Conversely, a Clerk, Auth0, or Supabase Auth outage can lock customers out while your application returns HTTP 200 on every other endpoint.
Your Payment Integration
The payment endpoint or checkout page (https://app.yoursaas.com/upgrade or your billing portal URL) is worth a dedicated monitor for any SaaS product that charges money. If a Stripe configuration change, a webhook misconfiguration, or a dependencies update breaks your billing flow, you may go hours without noticing — because you won't be trying to upgrade yourself.
For early-stage products, this is also where integration drift happens: a third-party payment library update can break the checkout form without causing any HTTP failures on other endpoints.
Your Onboarding Flow
The first step a new customer takes in your product — often the signup page or onboarding wizard — is worth monitoring. Acquisition is expensive. A broken signup flow means you're spending money on ads or content that drives potential customers to a broken page. Monitor https://app.yoursaas.com/signup and verify a 200.
SSL Certificate Monitoring
Every SaaS product that runs on HTTPS (which is all of them) should monitor SSL certificate validity. Let's Encrypt certificates expire after 90 days and depend on automated renewal that requires specific server configurations. When renewal fails, your customers start seeing browser security warnings that block access to your product entirely.
Configure SSL monitoring on your main app domain and any custom subdomains (app.yoursaas.com, api.yoursaas.com, status.yoursaas.com). A 30-day expiry alert gives you enough time to diagnose and fix renewal issues before they become an incident.
Cron Job and Background Task Monitoring
Most SaaS products have scheduled jobs: email digest sends, billing renewals, data sync tasks, cleanup jobs. When these jobs silently stop running, the problem often isn't visible as a user-facing failure — users don't get their weekly email, invoices fail to regenerate, data grows stale.
Vigilmon's heartbeat monitoring is designed for this. Add a call to your Vigilmon heartbeat URL at the end of each critical cron job. If the job stops running — for any reason — the heartbeat stops arriving and Vigilmon fires an alert.
For each critical background task, add a heartbeat monitor and configure an expected check-in interval (matching your cron schedule). This catches the silent failures that user-facing HTTP monitoring misses entirely.
Progressive Monitoring as You Scale
At launch, you don't need an elaborate monitoring stack. Add monitors progressively as your product grows.
Week 1 (pre-launch):
- Web app homepage
- API health endpoint
- SSL certificate
First customers:
- Auth / login page
- Onboarding / signup page
- Cron job heartbeats for billing and email jobs
Early revenue ($1k–$10k MRR):
- Payment / billing page
- Any region-specific endpoints if you serve international customers
- Set up your Vigilmon status page and add the link to your app's footer
Growth ($10k+ MRR):
- All critical API endpoints, not just
/health - TCP monitoring for infrastructure services (database, Redis) if you manage your own infrastructure
- Consider a public status page at
status.yoursaas.comwith a custom domain
Incident Communication with Early Customers
When something breaks, how you communicate matters as much as how quickly you fix it. Early customers who hear from you promptly forgive far more than customers who had to discover the outage themselves.
Acknowledge within 5 minutes: As soon as an alert fires, post a brief update to your status page. Even "We're investigating an issue with [component]" is better than silence. Customers checking your status page want to know you're aware.
Update every 30 minutes: Even if you have nothing new to report, post an update with a timestamp. "We're still investigating, no ETA yet — team is on it." This demonstrates active engagement and prevents customers from assuming you've disappeared.
Write a post-mortem for significant incidents: For any outage over 30 minutes or that affected paying customers, write a brief post-mortem and post it to your status page. Describe what happened, how long it lasted, how you fixed it, and what you're doing to prevent recurrence. This is one of the highest-trust signals you can send to early customers.
Never make them ask: Customers who have to email you asking "is the service down?" have already lost confidence. A working status page and prompt incident communication eliminate the need for them to ask.
Vigilmon Free Tier: What You Get Pre-Revenue
Vigilmon's free tier includes 5 monitors with 1-minute check intervals, multi-region consensus alerting, and a public status page. For a pre-revenue SaaS founder, this covers the essentials:
- Web application
- API health endpoint
- Auth / login page
- SSL certificate
- One critical cron job heartbeat or the payment page
Five well-chosen monitors cover the primary failure surface of most early-stage SaaS products. When you scale to paid plans, you add monitors progressively as your architecture grows.
The status page is included on the free tier. Set it up at launch, even with just two or three monitors on it. Having status.yoursaas.com live on day one is a signal of operational seriousness that founders with more mature products forget to set up. It costs nothing and communicates a lot.
Summary
Monitoring is not something to add after you have customers. It's something to configure before you launch, so that when something breaks — and something will break — you know within 60 seconds instead of when a frustrated customer emails you.
At minimum: monitor your web app, your API health endpoint, and your SSL certificate before launch. Add auth and the onboarding flow in your first week of customers. Add cron job heartbeats for billing and email jobs as soon as they exist. Set up your status page and link to it from your app.
The cost is approximately $0 to start. The cost of not having it is a 2 AM outage that runs for six hours and causes your first three customers to churn.
Start monitoring your SaaS product for free at vigilmon.online — 5 monitors, 1-minute check intervals, multi-region probing, and a status page. Free, forever, for early-stage products.
Tags: #saas #founders #monitoring #uptime #devops #startups #statuspage #reliability